Powered by Deep Web Technologies
Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Type Ia Supernovae Project at NERSC  

NLE Websites -- All DOE Office Websites (Extended Search)

Type Ia Supernovae Type Ia Supernovae Supernova-1.jpg Update: Recent Berkeley Lab Computing Sciences News about supernovae: read more... Key Challenges: Understanding Type Ia...

2

Category:Mason, IA | Open Energy Information  

Open Energy Info (EERE)

IA IA Jump to: navigation, search Go Back to PV Economics By Location Media in category "Mason, IA" The following 16 files are in this category, out of 16 total. SVQuickServiceRestaurant Mason IA MidAmerican Energy Co (Iowa).png SVQuickServiceRestaura... 64 KB SVFullServiceRestaurant Mason IA MidAmerican Energy Co (Iowa).png SVFullServiceRestauran... 64 KB SVHospital Mason IA MidAmerican Energy Co (Iowa).png SVHospital Mason IA Mi... 73 KB SVLargeHotel Mason IA MidAmerican Energy Co (Iowa).png SVLargeHotel Mason IA ... 72 KB SVLargeOffice Mason IA MidAmerican Energy Co (Iowa).png SVLargeOffice Mason IA... 73 KB SVMediumOffice Mason IA MidAmerican Energy Co (Iowa).png SVMediumOffice Mason I... 69 KB SVMidriseApartment Mason IA MidAmerican Energy Co (Iowa).png

3

Prospective Type Ia supernova surveys from Dome A  

E-Print Network (OSTI)

Prospective Type Ia Supernova Surveys From Dome A A. Kim a ,are conducive toward Type Ia supernova surveys forheterogeneities within the Type Ia supernova class, reducing

Kim, A.

2010-01-01T23:59:59.000Z

4

Turbulent Combustion in Type Ia Supernova Models  

E-Print Network (OSTI)

We review the astrophysical modeling of type Ia supernova explosions and describe numerical methods to implement numerical simulations of these events. Some results of such simulations are discussed.

F. K. Roepke; W. Hillebrandt

2006-09-15T23:59:59.000Z

5

New approaches for modeling type Ia supernovae  

SciTech Connect

Type Ia supernovae (SNe Ia) are the largest thermonuclearexplosions in the Universe. Their light output can be seen across greatstances and has led to the discovery that the expansion rate of theUniverse is accelerating. Despite the significance of SNe Ia, there arestill a large number of uncertainties in current theoretical models.Computational modeling offers the promise to help answer the outstandingquestions. However, even with today's supercomputers, such calculationsare extremely challenging because of the wide range of length and timescales. In this paper, we discuss several new algorithms for simulationsof SNe Ia and demonstrate some of their successes.

Zingale, Michael; Almgren, Ann S.; Bell, John B.; Day, Marcus S.; Rendleman, Charles A.; Woosley, Stan

2007-06-25T23:59:59.000Z

6

Theoretical cosmic Type Ia supernova rates  

E-Print Network (OSTI)

The aim of this work is the computation of the cosmic Type Ia supernova rates at very high redshifts (z>2). We adopt various progenitor models in order to predict the number of explosions in different scenarios for galaxy formation and to check whether it is possible to select the best delay time distribution model, on the basis of the available observations of Type Ia supernovae. We also computed the Type Ia supernova rate in typical elliptical galaxies of different initial luminous masses and the total amount of iron produced by Type Ia supernovae in each case. It emerges that: it is not easy to select the best delay time distribution scenario from the observational data and this is because the cosmic star formation rate dominates over the distribution function of the delay times; the monolithic collapse scenario predicts an increasing trend of the SN Ia rate at high redshifts whereas the predicted rate in the hierarchical scheme drops dramatically at high redshift; for the elliptical galaxies we note that the predicted maximum of the Type Ia supernova rate depends on the initial galactic mass. The maximum occurs earlier (at about 0.3 Gyr) in the most massive ellipticals, as a consequence of downsizing in star formation. We find that different delay time distributions predict different relations between the Type Ia supernova rate per unit mass at the present time and the color of the parent galaxies and that bluer ellipticals present higher supernova Type Ia rates at the present time.

R. Valiante; F. Matteucci; S. Recchi; F. Calura

2008-07-15T23:59:59.000Z

7

Steamboat IA Geothermal Facility | Open Energy Information  

Open Energy Info (EERE)

IA Geothermal Facility IA Geothermal Facility Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Steamboat IA Geothermal Facility General Information Name Steamboat IA Geothermal Facility Facility Steamboat IA Sector Geothermal energy Location Information Location Washoe, Nevada Coordinates 40.5608387°, -119.6035495° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.5608387,"lon":-119.6035495,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

8

The progenitors of subluminous type Ia supernovae  

DOE Green Energy (OSTI)

We find that spectroscopically peculiar subluminous SNe Ia come from an old population. Of the thirteen subluminous SNe Ia known, nine are found in E/S0 galaxies, and the remainder are found in early-type spirals. The probability that this is a chance occurrence is only 0.1%. The finding that subluminous SNe Ia are associated with an older stellar population indicates that for a sufficiently large lookback time (already accessible in current high redshift searches) they will not be found. Due to a scarcity in old populations, hydrogen and helium main sequence stars and He red giant stars that undergo Roche lobe overflow are unlikely to be the progenitors of subluminous SNe Ia. Earlier findings that overluminous SNe Ia (DELTA m{sub 15} (B) < 0.94) come from a young progenitor population are confirmed. The fact that subluminous SNe Ia and overluminous SNe Ia come from different progenitor populations and also have different properties is a prediction of the CO white dwarf merger progenitor scenario.

Howell, D. Andrew

2001-02-01T23:59:59.000Z

9

Rates and progenitors of type Ia supernovae  

SciTech Connect

The remarkable uniformity of Type Ia supernovae has allowed astronomers to use them as distance indicators to measure the properties and expansion history of the Universe. However, Type Ia supernovae exhibit intrinsic variation in both their spectra and observed brightness. The brightness variations have been approximately corrected by various methods, but there remain intrinsic variations that limit the statistical power of current and future observations of distant supernovae for cosmological purposes. There may be systematic effects in this residual variation that evolve with redshift and thus limit the cosmological power of SN Ia luminosity-distance experiments. To reduce these systematic uncertainties, we need a deeper understanding of the observed variations in Type Ia supernovae. Toward this end, the Nearby Supernova Factory has been designed to discover hundreds of Type Ia supernovae in a systematic and automated fashion and study them in detail. This project will observe these supernovae spectrophotometrically to provide the homogeneous high-quality data set necessary to improve the understanding and calibration of these vital cosmological yardsticks. From 1998 to 2003, in collaboration with the Near-Earth Asteroid Tracking group at the Jet Propulsion Laboratory, a systematic and automated searching program was conceived and executed using the computing facilities at Lawrence Berkeley National Laboratory and the National Energy Research Supercomputing Center. An automated search had never been attempted on this scale. A number of planned future large supernovae projects are predicated on the ability to find supernovae quickly, reliably, and efficiently in large datasets. A prototype run of the SNfactory search pipeline conducted from 2002 to 2003 discovered 83 SNe at a final rate of 12 SNe/month. A large, homogeneous search of this scale offers an excellent opportunity to measure the rate of Type Ia supernovae. This thesis presents a new method for analyzing the true sensitivity of a multi-epoch supernova search and finds a Type Ia supernova rate from z {approx} 0.01-0.1 of r{sub V} = 4.26{sub -1.93 -0.10}{sup +1.39 +0.10} h{sup 3} x 10{sup -4} SNe Ia/yr/Mpc{sup 3} from a preliminary analysis of a subsample of the SNfactory prototype search. Several unusual supernovae were found in the course of the SNfactory prototype search. One in particular, SN 2002ic, was the first SN Ia to exhibit convincing evidence for a circumstellar medium and offers valuable insight into the progenitors of Type Ia supernovae.

Wood-Vasey, William Michael

2004-08-16T23:59:59.000Z

10

Rolling Hills (IA) | Open Energy Information  

Open Energy Info (EERE)

Rolling Hills (IA) Rolling Hills (IA) Jump to: navigation, search Name Rolling Hills (IA) Facility Rolling Hills (IA) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MidAmerican Energy Company Developer MidAmerican Energy Company Energy Purchaser MidAmerican Energy Company Location Massena IA Coordinates 41.230443°, -94.75459° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.230443,"lon":-94.75459,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

11

On the Brightness of Supernova Ia  

E-Print Network (OSTI)

Before 1998 the universe expansion was thought to be slowing down. After 1998 the universe expansion is thought to be accelerating up. The key evidence came from the observed brightness of high redshift supernovae Ia in 1998. Astronomers found that the observed brightness of high redshift supernovae Ia is fainter than expected. Astronomers believe this means that the universe expansion is accelerating up. In this paper it is argued that if the ionized gas in the universe space is taken into account, then the brightness of the high redshift supernova Ia should be fainter than expected. The universe expansion does not need to be accelerating up. The exotic form of energy (dark energy) does not need to be introduce

Yijia Zheng

2013-10-01T23:59:59.000Z

12

Spectral diversity of Type Ia Supernovae  

E-Print Network (OSTI)

We use published spectroscopic and photometric data for 8 Type Ia supernovae to construct a dispersion spectrum for this class of object, showing their diversity over the wavelength range 3700A to 7100A. We find that the B and V bands are the spectral regions with the least dispersion, while the U band below 4100A is more diverse. Some spectral features such as the Si line at 6150A are also highly diverse. We then construct two objective measures of 'peculiarity' by (i) using the deviation of individual objects from the average SN Ia spectrum compared to the typical dispersion and (ii) applying principle component analysis. We demonstrate these methods on several SNe Ia that have previously been classified as peculiar.

J. Berian James; Tamara M. Davis; Brian P. Schmidt; Alex G. Kim

2006-05-05T23:59:59.000Z

13

Visualizing Buoyant Burning Bubbles in Type Ia Supernovae at...  

NLE Websites -- All DOE Office Websites (Extended Search)

Burning in Supernovae Buoyant Burning Bubbles in Type Ia Supernovae bubble-s.jpeg Flame ignition in type Ia supernovae leads to isolated bubbles of burning buoyant fluid. As a...

14

LINKING TYPE Ia SUPERNOVA PROGENITORS AND THEIR RESULTING EXPLOSIONS  

Science Conference Proceedings (OSTI)

Comparing the ejecta velocities at maximum brightness and narrow circumstellar/interstellar Na D absorption line profiles of a sample of 23 Type Ia supernovae (SNe Ia), we determine that the properties of SN Ia progenitor systems and explosions are intimately connected. As demonstrated by Sternberg et al., half of all SNe Ia with detectable Na D absorption at the host-galaxy redshift in high-resolution spectroscopy have Na D line profiles with significant blueshifted absorption relative to the strongest absorption component, which indicates that a large fraction of SN Ia progenitor systems have strong outflows. In this study, we find that SNe Ia with blueshifted circumstellar/interstellar absorption systematically have higher ejecta velocities and redder colors at maximum brightness relative to the rest of the SN Ia population. This result is robust at a 98.9%-99.8% confidence level, providing the first link between the progenitor systems and properties of the explosion. This finding is further evidence that the outflow scenario is the correct interpretation of the blueshifted Na D absorption, adding additional confirmation that some SNe Ia are produced from a single-degenerate progenitor channel. An additional implication is that either SN Ia progenitor systems have highly asymmetric outflows that are also aligned with the SN explosion or SNe Ia come from a variety of progenitor systems where SNe Ia from systems with strong outflows tend to have more kinetic energy per unit mass than those from systems with weak or no outflows.

Foley, Ryan J.; Kirshner, Robert P. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Simon, Joshua D.; Burns, Christopher R. [Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101 (United States); Gal-Yam, Avishay [Benoziyo Center for Astrophysics, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100 (Israel); Hamuy, Mario [Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago (Chile); Morrell, Nidia I.; Phillips, Mark M. [Las Campanas Observatory, Carnegie Observatories, Casilla 601, La Serena (Chile); Shields, Gregory A. [Department of Astronomy, University of Texas, Austin, TX 78712 (United States); Sternberg, Assaf, E-mail: rfoley@cfa.harvard.edu [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Strasse 1, 85741 Garching (Germany)

2012-06-20T23:59:59.000Z

15

Category:Des Moines, IA | Open Energy Information  

Open Energy Info (EERE)

IA IA Jump to: navigation, search Go Back to PV Economics By Location Media in category "Des Moines, IA" The following 16 files are in this category, out of 16 total. SVFullServiceRestaurant Des Moines IA MidAmerican Energy Co (Iowa).png SVFullServiceRestauran... 64 KB SVQuickServiceRestaurant Des Moines IA MidAmerican Energy Co (Iowa).png SVQuickServiceRestaura... 64 KB SVHospital Des Moines IA MidAmerican Energy Co (Iowa).png SVHospital Des Moines ... 73 KB SVLargeHotel Des Moines IA MidAmerican Energy Co (Iowa).png SVLargeHotel Des Moine... 72 KB SVLargeOffice Des Moines IA MidAmerican Energy Co (Iowa).png SVLargeOffice Des Moin... 73 KB SVMediumOffice Des Moines IA MidAmerican Energy Co (Iowa).png SVMediumOffice Des Moi... 69 KB SVMidriseApartment Des Moines IA MidAmerican Energy Co (Iowa).png

16

DOE - Office of Legacy Management -- Titus Metals - IA 04  

Office of Legacy Management (LM)

from consideration under FUSRAP Also see Documents Related to TITUS METALS IA.04-1 - Argonne National Laboratory Memorandum; Lonergan to Novak; Subject: Extrusion of Billets,...

17

Turbulence-Flame Interactions in Type Ia Supernovae  

E-Print Network (OSTI)

Turbulence-Flame Interactions in Type Ia Supernovae A. J.Normalised time (e) Normalised flame speed Normalised time (length scale (cm) Laminar flame width Gibson scale Cell

Aspden, Andrew J; Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 50A-1148, Berkeley, CA 94720 (Authors 1, 2 & 3); Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (Author 4); Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (Author 5)

2008-01-01T23:59:59.000Z

18

DOE - Office of Legacy Management -- Bendix Aviation Corp Pioneer Div - IA  

Office of Legacy Management (LM)

Bendix Aviation Corp Pioneer Div - Bendix Aviation Corp Pioneer Div - IA 05 FUSRAP Considered Sites Site: BENDIX AVIATION CORP., PIONEER DIV. (IA.05 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Pioneer Division, Bendix Aviation Corporation Bendix Aviation Corporation Bendix Pioneer Division IA.05-1 IA.05-2 IA.05-3 Location: Davenport , Iowa IA.05-1 Evaluation Year: 1990 IA.05-2 IA.05-4 Site Operations: Conducted studies to investigate the feasibility of using sonic cleaning equipment to decontaminate uranium contaminated drums. IA.05-1 Site Disposition: Eliminated - Potential for contamination considered remote based on limited operations at the site IA.05-2 IA.05-4 IA.05-5 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium IA.05-1

19

Conformal cosmological model and SNe Ia data  

SciTech Connect

Now there is a huge scientific activity in astrophysical studies and cosmological ones in particular. Cosmology transforms from a pure theoretical branch of science into an observational one. All the cosmological models have to pass observational tests. The supernovae type Ia (SNe Ia) test is among the most important ones. If one applies the test to determine parameters of the standard Friedmann-Robertson-Walker cosmological model one can conclude that observations lead to the discovery of the dominance of the {Lambda} term and as a result to an acceleration of the Universe. However, there are big mysteries connected with an origin and an essence of dark matter (DM) and the {Lambda} term or dark energy (DE). Alternative theories of gravitation are treated as a possible solution of DM and DE puzzles. The conformal cosmological approach is one of possible alternatives to the standard {Lambda}CDM model. As it was noted several years ago, in the framework of the conformal cosmological approach an introduction of a rigid matter can explain observational data without {Lambda} term (or dark energy). We confirm the claim with much larger set of observational data.

Zakharov, A. F., E-mail: zakharov@itep.ru [National Astronomical Observatories of Chinese Academy of Sciences (China); Pervushin, V. N. [Joint Institute for Nuclear Research, Bogoliubov Laboratory for Theoretical Physics (Russian Federation)

2012-11-15T23:59:59.000Z

20

The Distant Type Ia Supernova Rate  

DOE R&D Accomplishments (OSTI)

We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which surveyed about 12 square degrees, thirty-eight supernovae were detected at redshifts 0.25--0.85. In a spatially flat cosmological model consistent with the results obtained by the Supernova Cosmology Project, we derive a rest-frame Type Ia supernova rate at a mean red shift z {approx_equal} 0.55 of 1.53 {sub -0.25}{sub -0.31}{sup 0.28}{sup 0.32} x 10{sup -4} h{sup 3} Mpc{sup -3} yr{sup -1} or 0.58{sub -0.09}{sub -0.09}{sup +0.10}{sup +0.10} h{sup 2} SNu(1 SNu = 1 supernova per century per 10{sup 10} L{sub B}sun), where the first uncertainty is statistical and the second includes systematic effects. The dependence of the rate on the assumed cosmological parameters is studied and the redshift dependence of the rate per unit comoving volume is contrasted with local estimates in the context of possible cosmic star formation histories and progenitor models.

Pain, R.; Fabbro, S.; Sullivan, M.; Ellis, R. S.; Aldering, G.; Astier, P.; Deustua, S. E.; Fruchter, A. S.; Goldhaber, G.; Goobar, A.; Groom, D. E.; Hardin, D.; Hook, I. M.; Howell, D. A.; Irwin, M. J.; Kim, A. G.; Kim, M. Y.; Knop, R. A.; Lee, J. C.; Perlmutter, S.; Ruiz-Lapuente, P.; Schahmaneche, K.; Schaefer, B.; Walton, N. A.

2002-05-28T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Burning Thermals in Type Ia Supernovae A. J. Aspden1  

E-Print Network (OSTI)

Burning Thermals in Type Ia Supernovae A. J. Aspden1 , J. B. Bell1 , S. Dong2 , and S. E. Woosley2 ABSTRACT We develop a one-dimensional theoretical model for thermals burning in Type Ia supernovae based for the burning and for the expansion of the thermal due to changes in the background stratification found

Bell, John B.

22

Visualizing Type Ia Supernova Explosions at NERSC  

NLE Websites -- All DOE Office Websites (Extended Search)

Supernova Explosions Supernova Explosions Visualizing Type Ia Supernova Explosions Childs1a-Supernovasm.png Deep inside a dying star in a galaxy far, far away, a carbon fusion flame ignites. Ignition may happen in the middle or displaced slightly to one side, but this simulation explores the consequences of central ignition. In a localized hot spot, represented here by a deformed sphere with an average radius of 100 km, carbon is assumed to have already fused to iron, producing hot ash (~10 billion K) with a density about 20% less than its surroundings. As the burning progresses, this hot buoyant ash rises up and interacts with cold fuel. Rayleigh-Taylor fingers give rise to shear and turbulence, which interacts with the flame, causing it to move faster. In about 2 seconds, the energy released blows the entire white dwarf star up,

23

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Gasoline and Diesel Fuel Update (EIA)

176, "Annual Report of Natural and Supplemental Gas Supply and Disposition." NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA ME MI MA MD MN MS MT MO NE ND OH NV NM NY...

24

DOE - Office of Legacy Management -- Iowa Army Ammunition Plant - IA 02  

Office of Legacy Management (LM)

Army Ammunition Plant - IA 02 Army Ammunition Plant - IA 02 FUSRAP Considered Sites Iowa Army Ammunition Plant, IA Alternate Name(s): Burlington Ordnance Plant Iowa Ordnance Plant Silas Mason Company IA.02-3 Location: Located in Township 70 North, Range 3 West, Section 32, 5th Principal Meridian, Des Moines County, Burlington, Iowa IA.02-1 IA.02-5 Historical Operations: Assembled nuclear weapons, primarily high explosive components and conducted explosives testing using the high explosive components and depleted uranium. AEC and ERDA operations conducted under permit from the Department of the Army. IA.02-3 IA.02-4 Eligibility Determination: Eligible IA.02-5 Radiological Survey(s): Assessment Survey IA.02-2 Site Status: Cleanup pending by U.S. Army Corps of Engineers. IA.02-6

25

Late Light Curves of Normally-Luminous Type Ia Supernovae  

E-Print Network (OSTI)

The use of Type Ia supernovae as cosmological tools has reinforced the need to better understand these objects and their light curves. The light curves of Type Ia supernovae are powered by the nuclear decay of $^{56}Ni \\to ^{56}Co \\to ^{56}Fe$. The late time light curves can provide insight into the behavior of the decay products and their effect of the shape of the curves. We present the optical light curves of six "normal" Type Ia supernovae, obtained at late times with template image subtraction, and the fits of these light curves to supernova energy deposition models.

J. C. Lair; M. D. Leising; P. A. Milne; G. G. Williams

2006-01-05T23:59:59.000Z

26

UMore Ph IA CR Report 7-8-10.pdf  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PHASE IA ARCHAEOLOGICAL AND PHASE IA ARCHAEOLOGICAL AND ARCHITECTURAL HISTORY SURVEY FOR THE UMORE PARK RESEARCH WIND TURBINE PROJECT, DAKOTA COUNTY, MINNESOTA SHPO File No. Pending Client No. Pending The 106 Group Project No. 10-18 Submitted to: Barr Engineering Company 4700 West 77th Street Minneapolis, MN 55435-4803 Submitted by: The 106 Group Ltd. The Dacotah Building 370 Selby Avenue St. Paul, MN 55102 Principal Investigators: AnneKetz, M.A., RPA Greg Mathis, M.C.R.P. Report Authors: Mark Doperalski, B.S. Miranda Van Vleet, M.H.P July 2010 UMore Park Wind Turbine Project Phase IA Archaeological and Architectural History Survey Page i MANAGEMENT SUMMARY During May of 2010, The 106 Group Ltd. (106 Group) conducted a Phase IA archaeological and architectural history survey for the University of Minnesota Outreach, Research, and

27

TYPE Ia SUPERNOVAE STRONGLY INTERACTING WITH THEIR CIRCUMSTELLAR MEDIUM  

SciTech Connect

Owing to their utility for measurements of cosmic acceleration, Type Ia supernovae (SNe Ia) are perhaps the best-studied class of SNe, yet the progenitor systems of these explosions largely remain a mystery. A rare subclass of SNe Ia shows evidence of strong interaction with their circumstellar medium (CSM), and in particular, a hydrogen-rich CSM; we refer to them as SNe Ia-CSM. In the first systematic search for such systems, we have identified 16 SNe Ia-CSM, and here we present new spectra of 13 of them. Six SNe Ia-CSM have been well studied previously, three were previously known but are analyzed in depth for the first time here, and seven are new discoveries from the Palomar Transient Factory. The spectra of all SNe Ia-CSM are dominated by H{alpha} emission (with widths of {approx}2000 km s{sup -1}) and exhibit large H{alpha}/H{beta} intensity ratios (perhaps due to collisional excitation of hydrogen via the SN ejecta overtaking slower-moving CSM shells); moreover, they have an almost complete lack of He I emission. They also show possible evidence of dust formation through a decrease in the red wing of H{alpha} 75-100 days past maximum brightness, and nearly all SNe Ia-CSM exhibit strong Na I D absorption from the host galaxy. The absolute magnitudes (uncorrected for host-galaxy extinction) of SNe Ia-CSM are found to be -21.3 mag {<=} M{sub R} {<=} -19 mag, and they also seem to show ultraviolet emission at early times and strong infrared emission at late times (but no detected radio or X-ray emission). Finally, the host galaxies of SNe Ia-CSM are all late-type spirals similar to the Milky Way, or dwarf irregulars like the Large Magellanic Cloud, which implies that these objects come from a relatively young stellar population. This work represents the most detailed analysis of the SN Ia-CSM class to date.

Silverman, Jeffrey M. [Department of Astronomy, University of Texas, Austin, TX 78712-0259 (United States); Nugent, Peter E. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Gal-Yam, Avishay; Arcavi, Iair; Ben-Ami, Sagi [Benoziyo Center for Astrophysics, Weizmann Institute of Science, Rehovot 76100 (Israel); Sullivan, Mark [School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom); Howell, D. Andrew; Graham, Melissa L. [Las Cumbres Observatory Global Telescope Network, Goleta, CA 93117 (United States); Filippenko, Alexei V.; Bloom, Joshua S.; Cenko, S. Bradley; Clubb, Kelsey I. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Cao, Yi; Horesh, Assaf; Kulkarni, Shrinivas R. [Cahill Center for Astrophysics, California Institute of Technology, Pasadena, CA 91125 (United States); Chornock, Ryan; Foley, Ryan J. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Coil, Alison L. [Department of Physics, University of California, San Diego, La Jolla, CA 92093 (United States); Griffith, Christopher V. [Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States); Kasliwal, Mansi M., E-mail: jsilverman@astro.as.utexas.edu [Observatories of the Carnegie Institution of Science, Pasadena, CA 91101 (United States); and others

2013-07-01T23:59:59.000Z

28

VELOCITY EVOLUTION AND THE INTRINSIC COLOR OF TYPE Ia SUPERNOVAE  

SciTech Connect

To understand how best to use observations of Type Ia supernovae (SNe Ia) to obtain precise and accurate distances, we investigate the relations between spectra of SNe Ia and their intrinsic colors. Using a sample of 1630 optical spectra of 255 SNe, based primarily on data from the CfA Supernova Program, we examine how the velocity evolution and line strengths of Si II {lambda}6355 and Ca II H and K are related to the B - V color at peak brightness. We find that the maximum-light velocity of Si II {lambda}6355 and Ca II H and K and the maximum-light pseudo-equivalent width of Si II {lambda}6355 are correlated with intrinsic color, with intrinsic color having a linear relation with the Si II {lambda}6355 measurements. Ca II H and K does not have a linear relation with intrinsic color, but lower-velocity SNe tend to be intrinsically bluer. Combining the spectroscopic measurements does not improve intrinsic color inference. The intrinsic color scatter is larger for higher-velocity SNe Ia-even after removing a linear trend with velocity-indicating that lower-velocity SNe Ia are more 'standard crayons'. Employing information derived from SN Ia spectra has the potential to improve the measurements of extragalactic distances and the cosmological properties inferred from them.

Foley, Ryan J.; Sanders, Nathan E.; Kirshner, Robert P., E-mail: rfoley@cfa.harvard.edu [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2011-12-01T23:59:59.000Z

29

The Rate of Type Ia Supernovae at High Redshift  

E-Print Network (OSTI)

We derive the rates of Type Ia supernovae (SNIa) over a wide range of redshifts using a complete sample from the IfA Deep Survey. This sample of more than 100 SNIa is the largest set ever collected from a single survey, and therefore uniquely powerful for a detailed supernova rate (SNR) calculation. Measurements of the SNR as a function of cosmological time offer a glimpse into the relationship between the star formation rate (SFR) and Type Ia SNR, and may provide evidence for the progenitor pathway. We observe a progressively increasing Type Ia SNR between redshifts z~0.3-0.8. The Type Ia SNR measurements are consistent with a short time delay (t~1 Gyr) with respect to the SFR, indicating a fairly prompt evolution of SNIa progenitor systems. We derive a best-fit value of SFR/SNR 580 h_70^(-2) M_solar/SNIa for the conversion factor between star formation and SNIa rates, as determined for a delay time of t~1 Gyr between the SFR and the Type Ia SNR. More complete measurements of the Type Ia SNR at z>1 are necessary to conclusively determine the SFR--SNR relationship and constrain SNIa evolutionary pathways.

Brian J. Barris; John L. Tonry

2005-09-22T23:59:59.000Z

30

The diversity of Type Ia Supernovae: evidence for systematics?  

E-Print Network (OSTI)

The photometric and spectroscopic properties of 26 well observed Type Ia Supernovae (SNeIa) were analyzed with the aim to explore SNIa diversity. The sample includes (Branch-)normal SNe as well as extreme events like SNe 1991T and 1991bg, while the truly peculiar SNIa, SN2000cx and SN2002cx are not included in our sample . A statistical treatment reveals the existence of three different groups. The first group (FAINT) consists of faint SNeIa similar to SN1991bg, with low expansion velocities and rapid evolution of SiII velocity. A second group consists of ``normal'' SNeIa, also with high temporal velocity gradient (HVG), but with brighter mean absolute magnitude =-19.3 and higher expansion velocities than the FAINT SNe. The third group includes both ``normal'' and SN1991T-like SNeIa: these SNe populate a narrow strip in the SiII velocity evolution plot, with a small velocity gradient (SVG), but have absolute magnitudes similar to HVGs. While the FAINT and HVG SNeIa together seem to define a relation between RSi(II) and Dm15(B), the SVG ones either do not conform with that relation or define a new, looser one. The RSi(II) pre-maximum evolution of HVGs is strikingly different from that of SVGs. The impact of this evidence on the understanding of SNIa diversity, in terms of explosion mechanisms, degree of ejecta mixing, and ejecta-CSM interaction, is discussed.

S. Benetti; E. Cappellaro; P. A. Mazzali; M. Turatto; G. Altavilla; F. Bufano; N. Elias-Rosa; R. Kotak; G. Pignata; M. Salvo; V. Stanishev

2004-11-02T23:59:59.000Z

31

DISTRIBUTED FLAMES IN TYPE Ia SUPERNOVAE  

Science Conference Proceedings (OSTI)

At a density near a few x10{sup 7} g cm{sup -3}, the subsonic burning in a Type Ia supernova (SN) enters the distributed regime (high Karlovitz number). In this regime, turbulence disrupts the internal structure of the flame, and so the idea of laminar burning propagated by conduction is no longer valid. The nature of the burning in this distributed regime depends on the turbulent Damkoehler number (Da{sub T}), which steadily declines from much greater than one to less than one as the density decreases to a few x10{sup 6} g cm{sup -3}. Classical scaling arguments predict that the turbulent flame speed s{sub T} , normalized by the turbulent intensity u-check, follows s{sub T}/u-check = Da{sub T}{sup 1/2} for Da{sub T} {approx}burns as a turbulently broadened effective unity Lewis number flame. This flame burns locally with speed s{sub l}ambda and width l{sub l}ambda, and we refer to this kind of flame as a lambda-flame. The burning becomes a collection of lambda-flames spread over a region approximately the size of the {integral} scale. While the total burning rate continues to have a well-defined average, s{sub T}{approx}u-check, the burning is unsteady. We present a theoretical framework, supported by both one-dimensional and three-dimensional numerical simulations, for the burning in these two regimes. Our results indicate that the average value of s{sub T} can actually be roughly twice u-check for Da{sub T} {approx}> 1, and that localized excursions to as much as 5 times u-check can occur. We also explore the properties of the individual flames, which could be sites for a transition to detonation when Da{sub T} {approx} 1. The lambda-flame speed and width can be predicted based on the turbulence in the star (specifically the energy dissipation rate epsilon*) and the turbulent nuclear burning timescale of the fuel tau {sup T}{sub nuc}. We propose a practical method for measuring s{sub l}ambda and l{sub l}ambda based on the scaling relations and small-scale computationally inexpensive simulations. This suggests that a simple turbulent flame model can be easily constructed suitable for large-scale distributed SNe flames. These results will be useful both for characterizing the deflagration speed in larger full-star simulations, where the flame cannot be resolved, and for predicting when detonation occurs.

Aspden, A. J.; Bell, J. B. [Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 50A-1148, Berkeley, CA 94720 (United States); Woosley, S. E. [Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (United States)

2010-02-20T23:59:59.000Z

32

IA REP0 SAND85-2809 Unlimited Release UC-92A  

Office of Scientific and Technical Information (OSTI)

IA REP0 SAND85-2809 Unlimited Release UC-92A IA REP0 SAND85-2809 Unlimited Release UC-92A Printed July 1986 High Energy Gas Fracture Experiments in Fluid-Filled Boreholes-Potential Geothermal Application J. F. Cuderman, T. Y. Chu, J. Jung, R. D. Jacobson Prepared by Sandia National Laboratories Albuquerque, New Mexico 87 185 and Livermore, California 94550 for the United States Department of Energy under Contract DE-AC04-76DP00789 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process

33

Redshift-Independent Distances to Type Ia Supernovae  

E-Print Network (OSTI)

We describe a procedure for accurately determining luminosity distances to Type Ia supernovae (SNe Ia) without knowledge of redshift. This procedure, which may be used as an extension of any of the various distance determination methods currently in use, is based on marginalizing over redshift, removing the requirement of knowing $z$ a priori. We demonstrate that the Hubble diagram scatter of distances measured with this technique is approximately equal to that of distances derived from conventional redshift-specific methods for a set of 60 nearby SNe Ia. This indicates that accurate distances for cosmological SNe Ia may be determined without the requirement of spectroscopic redshifts, which are typically the limiting factor for the number of SNe that modern surveys can collect. Removing this limitation would greatly increase the number of SNe for which current and future SN surveys will be able to accurately measure distance. The method may also be able to be used for high-$z$ SNe Ia to determine cosmological density parameters without redshift information.

Brian J. Barris; John L. Tonry

2004-08-04T23:59:59.000Z

34

The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star  

E-Print Network (OSTI)

The absolute magnitudes of Type IA supernovae. Astrophys. J.in a Sublu- o minous Type Ia Supernova: SpectropolarimetryL. Could There Be a Hole in Type Ia Super- novae? Astrophys.

2008-01-01T23:59:59.000Z

35

Nucleosynthesis in type Ia supernovae driven by asymmetric thermonuclear ignition  

Science Conference Proceedings (OSTI)

Type Ia Supernovae (SNe Ia) are believed to be thermonuclear explosions of a white dwarf. They can be used as mature cosmological standardized candles, leading to the discovery of the accelerating expansion of the Universe. However, the explosion mechanism has not yet been fully clarified. In this paper, we first present nucleosynthetic features of a leading explosion scenario, namely a delayed-detonation scenario. Based on this, we propose a new and strong observational constraint on the explosion mechanism through emission lines from neutron-rich Fe-peaks. Especially, we show that an asymmetry in the explosion is likely a generic feature. We further argue that the diversity arising from various viewing angles can be an origin of observational diversities of SNe Ia seen in their spectral features (suspected possible biases in cosmology) and colors (related to the extinction estimate in cosmology). Using these new insights could open up a possibility of using SNe Ia as more precise distance indicators than currently employed.

Maeda, Keiichi [Institute for the Physics and Mathematics of the Universe (IPMU), Todai Institutes for Advanced Study (TODIAS), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan)

2012-11-12T23:59:59.000Z

36

Optical Spectra of Type Ia Supernovae at z=0.46 and z=1.2  

E-Print Network (OSTI)

We present optical spectra, obtained with the Keck 10-m telescope, of two high-redshift type Ia supernovae (SNe Ia) discovered by the High-z Supernova Search Team: SN 1999ff at z=0.455 and SN 1999fv at z~1.2, the highest-redshift published SN Ia spectrum. Both SNe were at maximum light when the spectra were taken. We compare our high-z spectra with low-z normal and peculiar SNe Ia as well as with SNe Ic, Ib, and II. There are no significant differences between SN 1999ff and normal SNe Ia at low redshift. SN 1999fv appears to be a SN Ia and does not resemble the most peculiar nearby SNe Ia.

Coil, A L; Filippenko, A V; Leonard, D C; Tonry, J; Riess, A G; Challis, P M; Clocchiatti, A; Garnavich, P M; Hogan, C J; Jha, S; Kirshner, R P; Leibundgut, B; Phillips, M M; Schmidt, B P; Schommer, R A; Smith, R C; Soderberg, A M; Spyromilio, J; Stubbs, C; Suntzeff, N B; Woudt, P A; Coil, Alison L.; Matheson, Thomas; Filippenko, Alexei V.; Leonard, Douglas C.; Tonry, John; Riess, Adam G.; Challis, Peter; Clocchiatti, Alejandro; Garnavich, Peter M.; Hogan, Craig J.; Jha, Saurabh; Kirshner, Robert P.; Schmidt, Brian P.; Schommer, Robert A.; Soderberg, Alicia M.; Stubbs, Christopher; Suntzeff, Nicholas B.; Woudt, Patrick

2000-01-01T23:59:59.000Z

37

Progenitors of type Ia supernovae in elliptical galaxies  

Science Conference Proceedings (OSTI)

Although there is a nearly universal agreement that type Ia supernovae are associated with the thermonuclear disruption of a CO white dwarf, the exact nature of their progenitors is still unknown. The single degenerate scenario envisages a white dwarf accreting matter from a non-degenerate companion in a binary system. Nuclear energy of the accreted matter is released in the form of electromagnetic radiation or gives rise to numerous classical nova explosions prior to the supernova event. We show that combined X-ray output of supernova progenitors and statistics of classical novae predicted in the single degenerate scenario are inconsistent with X-ray and optical observations of nearby early type galaxies and galaxy bulges. White dwarfs accreting from a donor star in a binary system and detonating at the Chandrasekhar mass limit can account for no more than {approx}5% of type Ia supernovae observed in old stellar populations.

Gilfanov, M.; Bogdan, A.

2011-09-21T23:59:59.000Z

38

Learning from the scatter in type ia supernovae  

SciTech Connect

Type Ia Supernovae are standard candles so their mean apparent magnitude has been exploited to learn about the redshift-distance relationship. Besides intrinsic scatter in this standard candle, additional scatter is caused by gravitational magnification by large scale structure. Here they probe the dependence of this dispersion on cosmological parameters and show that information about the amplitude of clustering, {sigma}{sub s}, is contained in the scatter. In principle, it will be possible to constrain {sigma}{sub s} to within 5% with observations of 2000 Type Ia Supernovae. They identify three sources of systematic error--evolution of intrinsic scatter, baryon contributions to lensing, and non-Gaussianity of lensing--which will make this measurement difficult.

Dodelson, Scott; /Fermilab /Chicago U., Astron. Astrophys. Ctr.; Vallinotto, Alberto; /Fermilab /Chicago U.

2005-11-01T23:59:59.000Z

39

Type Ia Supernova Spectral Line Ratios as LuminosityIndicators  

SciTech Connect

Type Ia supernovae have played a crucial role in thediscovery of the dark energy, via the measurement of their light curvesand the determination of the peak brightness via fitting templates to theobserved lightcurve shape. Two spectroscopic indicators are also known tobe well correlated with peak luminosity. Since the spectroscopicluminosity indicators are obtained directly from observed spectra, theywill have different systematic errors than do measurements usingphotometry. Additionally, these spectroscopic indicators may be usefulfor studies of effects of evolution or age of the SNe~;Ia progenitorpopulation. We present several new variants of such spectroscopicindicators which are easy to automate and which minimize the effects ofnoise. We show that these spectroscopic indicators can be measured byproposed JDEM missions such as snap and JEDI.

Bongard, Sebastien; Baron, E.; Smadja, G.; Branch, David; Hauschildt, Peter H.

2005-12-07T23:59:59.000Z

40

Investigating the Flame Microstructure in Type Ia Supernovae  

E-Print Network (OSTI)

We present a numerical model to study the behavior of thermonuclear flames in the discontinuity approximation. This model is applied to investigate the Landau-Darrieus instability under conditions found in Type Ia supernova explosions of Chandrasekhar mass white dwarfs. This is a first step to explore the flame microstructure in these events. The model reproduces Landau's linearized stability analysis in early stages of the flame evolution and the stabilization in a cellular flame structure in the nonlinear stage.

F. K. Roepke; W. Hillebrandt; J. C. Niemeyer

2002-04-02T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Reflections on Reflexions: I. Light Echoes in Type Ia Supernovae  

E-Print Network (OSTI)

In the last ten years, observational evidences about a possible connection between Type Ia Supernovae (SNe) properties and the environment where they explode have been steadily growing. In this paper I discuss, from a theoretical point of view but with an observer's perspective, the usage of light echoes (LEs) to probe the CSM around SNe of Type Ia since, in principle, they give us a unique opportunity of getting a three-dimensional description of the SN environment. In turn, this can be used to check the often suggested association of some Ia's with dusty/star forming regions, which would point to a young population for the progenitors. After giving a brief introduction to the LE phenomenon in single scattering approximation, I derive analytical and numerical solutions for the optical light and colour curves for a few simple dust geometries. A fully 3D multiple scattering treatment has also been implemented in a Monte Carlo code, which I have used to investigate the effects of multiple scattering. In particu...

Patat, F

2004-01-01T23:59:59.000Z

42

Could There Be A Hole In Type Ia Supernovae?  

E-Print Network (OSTI)

In the favored progenitor scenario, Type Ia supernovae arise from a white dwarf accreting material from a non-degenerate companion star. Soon after the white dwarf explodes, the ejected supernova material engulfs the companion star; two-dimensional hydrodynamical simulations by Marietta et. al. show that, in the interaction, the companion star carves out a conical hole of opening angle 30-40 degrees in the supernova ejecta. In this paper we use multi-dimensional Monte Carlo radiative transfer calculations to explore the observable consequences of an ejecta-hole asymmetry. We calculate the variation of the spectrum, luminosity, and polarization with viewing angle for the aspherical supernova near maximum light. We find that the supernova looks normal from almost all viewing angles except when one looks almost directly down the hole. In the latter case, one sees into the deeper, hotter layers of ejecta. The supernova is relatively brighter and has a peculiar spectrum characterized by more highly ionized species, weaker absorption features, and lower absorption velocities. The spectrum viewed down the hole is comparable to the class of SN 1991T-like supernovae. We consider how the ejecta-hole asymmetry may explain the current spectropolarimetric observations of SNe Ia, and suggest a few observational signatures of the geometry. Finally, we discuss the variety currently seen in observed SNe Ia and how an ejecta-hole asymmetry may fit in as one of several possible sources of diversity.

Daniel Kasen; Peter Nugent; R. C. Thomas; Lifan Wang

2003-11-01T23:59:59.000Z

43

THE SDSS-II SUPERNOVA SURVEY: PARAMETERIZING THE TYPE Ia SUPERNOVA RATE AS A FUNCTION OF HOST GALAXY PROPERTIES  

Science Conference Proceedings (OSTI)

Using data from the Sloan Digital Sky Supernova Survey-II (SDSS-II SN Survey), we measure the rate of Type Ia supernovae (SNe Ia) as a function of galaxy properties at intermediate redshift. A sample of 342 SNe Ia with 0.05 0.15) SNe Ia in highly star-forming galaxies. We consider that the high levels of dust in these systems may be obscuring the reddest and faintest SNe Ia.

Smith, Mathew [Department of Physics, University of Western Cape, Bellville 7530, Cape Town (South Africa); Nichol, Robert C. [Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX (United Kingdom); Dilday, Benjamin [Las Cumbres Observatory Global Telescope Network, 6740 Cortona Dr., Suite 102, Goleta, CA 93117 (United States); Marriner, John; Frieman, Joshua [Center for Particle Astrophysics, Fermilab, P.O. Box 500, Batavia, IL 60510 (United States); Kessler, Richard [Department of Astronomy and Astrophysics, University of Chicago, 5640 S. Ellis Ave, Chicago, IL 60637 (United States); Bassett, Bruce [African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945 (South Africa); Cinabro, David [Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201 (United States); Garnavich, Peter [Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN 46556 (United States); Jha, Saurabh W. [Department of Physics and Astronomy, Rutgers, State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Lampeitl, Hubert [Astrophysics, Cosmology and Gravity Centre (ACGC), Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch 7701 (South Africa); Sako, Masao [Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Schneider, Donald P. [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States); Sollerman, Jesper, E-mail: matsmith2@gmail.com [Oskar Klein Centre, Department of Astronomy, AlbaNova, Stockholm University, SE-106 91 Stockholm (Sweden)

2012-08-10T23:59:59.000Z

44

THE DIFFUSE GAMMA-RAY BACKGROUND FROM TYPE Ia SUPERNOVAE  

SciTech Connect

The origin of the diffuse extragalactic gamma-ray background (EGB) has been intensively studied but remains unsettled. Current popular source candidates include unresolved star-forming galaxies, starburst galaxies, and blazars. In this paper, we calculate the EGB contribution from the interactions of cosmic rays accelerated by Type Ia supernovae (SNe), extending earlier work that only included core-collapse SNe. We consider Type Ia events not only in star-forming galaxies, but also in quiescent galaxies that lack star formation. In the case of star-forming galaxies, consistently including Type Ia events makes little change to the star-forming EGB prediction, so long as both SN types have the same cosmic-ray acceleration efficiencies in star-forming galaxies. Thus, our updated EGB estimate continues to show that star-forming galaxies can represent a substantial portion of the signal measured by Fermi. In the case of quiescent galaxies, conversely, we find a wide range of possibilities for the EGB contribution. The dominant uncertainty we investigated comes from the mass in hot gas in these objects, which provides targets for cosmic rays; total gas masses are as yet poorly known, particularly at larger radii. Additionally, the EGB estimation is very sensitive to the cosmic-ray acceleration efficiency and confinement, especially in quiescent galaxies. In the most optimistic allowed scenarios, quiescent galaxies can be an important source of the EGB. In this case, star-forming galaxies and quiescent galaxies together will dominate the EGB and leave little room for other contributions. If other sources, such as blazars, are found to have important contributions to the EGB, then either the gas mass or cosmic-ray content of quiescent galaxies must be significantly lower than in their star-forming counterparts. In any case, improved Fermi EGB measurements will provide important constraints on hot gas and cosmic rays in quiescent galaxies.

Lien, Amy; Fields, Brian D. [Department of Physics, University of Illinois, Urbana, IL 61801 (United States)

2012-03-10T23:59:59.000Z

45

Reflections on Reflexions: I. Light Echoes in Type Ia Supernovae  

E-Print Network (OSTI)

In the last ten years, observational evidences about a possible connection between Type Ia Supernovae (SNe) properties and the environment where they explode have been steadily growing. In this paper I discuss, from a theoretical point of view but with an observer's perspective, the usage of light echoes (LEs) to probe the CSM around SNe of Type Ia since, in principle, they give us a unique opportunity of getting a three-dimensional description of the SN environment. In turn, this can be used to check the often suggested association of some Ia's with dusty/star forming regions, which would point to a young population for the progenitors. After giving a brief introduction to the LE phenomenon in single scattering approximation, I derive analytical and numerical solutions for the optical light and colour curves for a few simple dust geometries. A fully 3D multiple scattering treatment has also been implemented in a Monte Carlo code, which I have used to investigate the effects of multiple scattering. In particular, I have explored in detail the LE colour dependency from time and dust distribution, since this is a promising tool to determine the dust density and derive the effective presence of multiple scattering from the observed properties. Finally, again by means of Monte Carlo simulations, I have studied the effects of multiple scattering on the LE linear polarization, analyzing the dependencies from the dust parameters and geometry. Both the analytical formalism and MC codes described in this paper can be used for any LE for which the light curve of the central source is known.

F. Patat

2004-09-28T23:59:59.000Z

46

Turbulence-Flame Interactions in Type Ia Supernovae  

SciTech Connect

The large range of time and length scales involved in type Ia supernovae (SN Ia) requires the use of flame models. As a prelude to exploring various options for flame models, we consider, in this paper, high-resolution three-dimensional simulations of the small-scale dynamics of nuclear flames in the supernova environment in which the details of the flame structure are fully resolved. The range of densities examined, 1 to 8 x 107 g cm-3, spans the transition from the laminar flamelet regime to the distributed burning regime where small scale turbulence disrupts the flame. The use of a low Mach number algorithm facilitates the accurate resolution of the thermal structure of the flame and the inviscid turbulent kinetic energy cascade, while implicitly incorporating kinetic energy dissipation at the grid-scale cutoff. For an assumed background of isotropic Kolmogorov turbulence with an energy characteristic of SN Ia, we find a transition density between 1 and 3 x 107 g cm-3 where the nature of the burning changes ualitatively. By 1 x 107 g cm-3, energy diffusion by conduction and radiation is exceeded, on the flame scale, by turbulent advection. As a result, the effective Lewis Number approaches unity. That is, the flame resembles a laminar flame, but is turbulently broadened with an effective diffusion coefficient, D_T \\sim u' l, where u' is the turbulent intensity and l is the integral scale. For the larger integral scales characteristic of a real supernova, the flame structure is predicted to become complex and unsteady. Implications for a possible transition to detonation are discussed.

Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 50A-1148, Berkeley, CA 94720 (Authors 1, 2& 3); Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (Author 4); Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (Author 5); Aspden, Andrew J; Aspden, Andrew J.; Bell, John B.; Day, Marc S.; Woosley, Stan E.; Zingale, Mike

2008-05-27T23:59:59.000Z

47

Turbulence-Flame Interactions in Type Ia Supernovae  

E-Print Network (OSTI)

The large range of time and length scales involved in type Ia supernovae (SN Ia) requires the use of flame models. As a prelude to exploring various options for flame models, we consider, in this paper, high-resolution three-dimensional simulations of the small-scale dynamics of nuclear flames in the supernova environment in which the details of the flame structure are fully resolved. The range of densities examined, 1 to $8 \\times 10^7$ g cm$^{-3}$, spans the transition from the laminar flamelet regime to the distributed burning regime where small scale turbulence disrupts the flame. The use of a low Mach number algorithm facilitates the accurate resolution of the thermal structure of the flame and the inviscid turbulent kinetic energy cascade, while implicitly incorporating kinetic energy dissipation at the grid-scale cutoff. For an assumed background of isotropic Kolmogorov turbulence with an energy characteristic of SN Ia, we find a transition density between 1 and $3 \\times 10^7$ g cm$^{-3}$ where the nature of the burning changes qualitatively. By $1 \\times 10^7$ g cm$^{-3}$, energy diffusion by conduction and radiation is exceeded, on the flame scale, by turbulent advection. As a result, the effective Lewis Number approaches unity. That is, the flame resembles a laminar flame, but is turbulently broadened with an effective diffusion coefficient, $D_T \\sim u' l$, where $u'$ is the turbulent intensity and $l$ is the integral scale. For the larger integral scales characteristic of a real supernova, the flame structure is predicted to become complex and unsteady. Implications for a possible transition to detonation are discussed.

A. J. Aspden; J. B. Bell; M. S. Day; S. E. Woosley; M. Zingale

2008-11-17T23:59:59.000Z

48

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Gasoline and Diesel Fuel Update (EIA)

0.00-1.99 0.00-1.99 2.00-2.99 3.00-3.99 4.00-4.99 5.00-5.99 6.00-6.99 7.00+ NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA ME MI MA MD MN MS MT MO NE ND OH NV NM NY NH NC OK OR PA RI SC SD TN TX UT VT WA WV WI AZ VA DC 0.00-1.99 2.00-2.99 3.00-3.99 4.00-4.99 5.00-5.99 6.00-6.99 7.00+ 18. Average Price of Natural Gas Delivered to U.S. Onsystem Industrial Consumers, 1996 (Dollars per Thousand Cubic Feet) Figure 19. Average Price of Natural Gas Delivered to U.S. Electric Utilities, 1996 (Dollars per Thousand Cubic Feet) Figure Sources: Federal Energy Regulatory Commission (FERC), Form FERC-423, "Monthly Report of Cost and Quality of Fuels for Electric Plants," and Energy Information Administration (EIA), Form EIA-176, "Annual Report of Natural and Supplemental Gas Supply and Disposition." Note: In 1996, consumption of natural gas for agricultural use

49

Microsoft PowerPoint - IEEE IAS PES 102313.pptx  

NLE Websites -- All DOE Office Websites (Extended Search)

DOE's ARRA DOE's ARRA Smart Grid Program Steve Bossart, Senior Energy Analyst IEEE IAS/PES Pittsburgh Section October 23, 2013 ‹#› Topics * OE ARRA Smart Grid Program * OE ARRA Smart Grid Progress * Results and Case Studies * Life After ARRA Smart Grid ‹#› DOE OE ARRA Smart Grid Program ‹#› American Recovery and Reinvestment Act ($4.5B) * Smart Grid Investment Grants (99 projects) - $3.4 billion Federal; $4.7 billion private sector - > 800 PMUs covering almost 100% of transmission - ~ 8000 distribution automation circuits - > 15 million smart meters * Smart Grid Demonstration Projects (32 projects) - $685 million Federal; $1 billion private sector - 16 storage projects - 16 regional demonstrations Smart Grid ARRA Activities ‹#› Smart Grid investment from ARRA field projects

50

Type Ia Supernova: Burning and Detonation in the Distributed Regime  

E-Print Network (OSTI)

A simple, semi-analytic representation is developed for nuclear burning in Type Ia supernovae in the special case where turbulent eddies completely disrupt the flame. The speed and width of the ``distributed'' flame front are derived. For the conditions considered, the burning front can be considered as a turbulent flame brush composed of corrugated sheets of well-mixed flames. These flames are assumed to have a quasi-steady-state structure similar to the laminar flame structure, but controlled by turbulent diffusion. Detonations cannot appear in the system as long as distributed flames are still quasi-steady-state, but this condition is violated when the distributed flame width becomes comparable to the size of largest turbulent eddies. When this happens, a transition to detonation may occur. For current best estimates of the turbulent energy, the most likely density for the transition to detonation is in the range 0.5 - 1.5 x 10^7 g cm^{-3}.

S. E. Woosley

2007-09-26T23:59:59.000Z

51

Type Ia Supernovae Rates and Galaxy Clustering from the CFHT Supernova Legacy Survey  

E-Print Network (OSTI)

The Canada-France-Hawaii Telescope Supernova Legacy Survey (SNLS) has created a large homogeneous database of intermediate redshift (0.2 rates, properties, and host galaxy star formation rates. The SNLS SN Ia database has now been combined with a photometric redshift galaxy catalog and an optical galaxy cluster catalog to investigate the possible influence of galaxy clustering on the SN Ia rate, over and above the expected effect due to the dependence of SFR on clustering through the morphology-density relation. We identify three cluster SNe Ia, plus three additional possible cluster SNe Ia, and find the SN Ia rate per unit mass in clusters at intermediate redshifts is consistent with the rate per unit mass in field early-type galaxies and the SN Ia cluster rate from low redshift cluster targeted surveys. We also find the number of SNe Ia in cluster environments to be within a factor of two of expectations from the two component SNIa rate model.

M. L. Graham; C. J. Pritchet; M. Sullivan; S. D. J. Gwyn; J. D. Neill; E. Y. Hsiao; P. Astier; D. Balam; C. Balland; S. Basa; R. G. Carlberg; A. Conley; D. Fouchez; J. Guy; D. Hardin; I. M. Hook; D. A. Howell; R. Pain; K. Perrett; N. Regnault; S. Baumont; J. Le Du; C. Lidman; S. Perlmutter; P. Ripoche; N. Suzuki; E. S. Walker; T. Zhang

2008-01-31T23:59:59.000Z

52

Fitting Type Ia supernovae with coupled dark energy  

E-Print Network (OSTI)

We discuss the possible consistency of the recently discovered Type Ia supernovae at z>1 with models in which dark energy is strongly coupled to a significant fraction of dark matter, and in which an (asymptotic) accelerated phase exists where dark matter and dark energy scale in the same way. Such a coupling has been suggested for a possible solution of the coincidence problem, and is also motivated by string cosmology models of "late time" dilaton interactions. Our analysis shows that, for coupled dark energy models, the recent data are still consistent with acceleration starting as early as at $z=3$ (to within 90% c.l.), although at the price of a large "non-universality" of the dark energy coupling to different matter fields. Also, as opposed to uncoupled models which seem to prefer a ``phantom'' dark energy, we find that a large amount of coupled dark matter is compatible with present data only if the dark energy field has a conventional equation of state w>-1.

Amendola, L; Piazza, F; Amendola, Luca; Gasperini, Maurizio; Piazza, Federico

2004-01-01T23:59:59.000Z

53

Mtrologie des supernovae de type Ia pour la cosmologie : instrumentation et analyse calorimtrique.  

E-Print Network (OSTI)

??L'utilisation des supernovae de type Ia comme indicateurs de distance est un pilier du modle de concordance actuel en cosmologie. Le travail d'instrumentation prsent dans (more)

Juramy, Claire

2006-01-01T23:59:59.000Z

54

Toward Exascale Computing of Type Ia and Ib,c Supernovae: V&V...  

NLE Websites -- All DOE Office Websites (Extended Search)

Toward Exascale Computing of Type Ia and Ib,c Supernovae: V&V of Current Models PI Name: Don Lamb PI Email: lamb@oddjob.uchicago.edu Institution: University Of Chicago Allocation...

55

Diversity of supernovae Ia determined using equivalent widths of Si II 4000  

E-Print Network (OSTI)

Spectroscopic and photometric properties of low and high-z supernovae Ia (SNe Ia) have been analyzed in order to achieve a better understanding of their diversity and to identify possible SN Ia sub-types. We use wavelet transformed spectra in which one can easily measure spectral features. We investigate the \\ion{Si}{II} 4000 equivalent width ($EW_w\\lbrace\\ion{Si}{II}\\rbrace$). The ability and, especially, the ease in extending the method to SNe at high-$z$ is demonstrated. We applied the method to 110 SNe Ia and found correlations between $EW_w\\lbrace\\ion{Si}{II}\\rbrace$ and parameters related to the light-curve shape for 88 supernovae with available photometry. No evidence for evolution of $EW_w\\lbrace\\ion{Si}{II}\\rbrace$ with redshift is seen. Three sub-classes of SNe Ia were confirmed using an independent cluster analysis with only light-curve shape, colour, and $EW_w\\lbrace\\ion{Si}{II}\\rbrace$. SNe from high-$z$ samples seem to follow a similar grouping to nearby objects. The $EW_w\\lbrace\\ion{Si}{II}\\rbrace$ value measured on a single spectrum may point towards SN Ia sub-classification, avoiding the need for expansion velocity gradient calculations.

V. Arsenijevic; S. Fabbro; A. M. Mourao; A. J. Rica da Silva

2008-09-18T23:59:59.000Z

56

Verifying the Cosmological Utility of Type Ia Supernovae: Implications of a Dispersion in the Ultraviolet Spectra  

SciTech Connect

We analyze the mean rest-frame ultraviolet (UV) spectrum of Type Ia Supernovae (SNe) and its dispersion using high signal-to-noise ratio Keck-I/LRIS-B spectroscopy for a sample of 36 events at intermediate redshift (z=0.5) discovered by the Canada-France-Hawaii Telescope Supernova Legacy Survey (SNLS). We introduce a new method for removing host galaxy contamination in our spectra, exploiting the comprehensive photometric coverage of the SNLS SNe and their host galaxies, thereby providing the first quantitative view of the UV spectral properties of a large sample of distant SNe Ia. Although the mean SN Ia spectrum has not evolved significantly over the past 40percent of cosmic history, precise evolutionary constraints are limited by the absence of a comparable sample of high-quality local spectra. The mean UV spectrum of our z~;;=0.5 SNe Ia and its dispersion is tabulated for use in future applications. Within the high-redshift sample, we discover significant UV spectral variations and exclude dust extinction as the primary cause by examining trends with the optical SN color. Although progenitor metallicity may drive some of these trends, the variations we see are much larger than predicted in recent models and do not follow expected patterns. An interesting new result is a variation seen in the wavelength of selected UV features with phase. We also demonstrate systematic differences in the SN Ia spectral features with SN light curve width in both the UV and the optical. We show that these intrinsic variations could represent a statistical limitation in the future use of high-redshift SNe Ia for precision cosmology. We conclude that further detailed studies are needed, both locally and at moderate redshift where the rest-frame UV can be studied precisely, in order that future missions can confidently be planned to fully exploit SNe Ia as cosmological probes.

Nugent, Peter E; Ellis, R.S.; Sullivan, M.; Nugent, P.E.; Howell, D.A.; Gal-Yam, A.; Astier, P.; Balam, D.; Balland, C.; Basa, S.; Carlberg, R.; Conley, A.; Fouchez, D.; Guy, J.; Hardin, D.; Hook, I.; Pain, R.; Perrett, K.; Pritchet, C.J.; Regnault, N.

2008-02-28T23:59:59.000Z

57

THE FIRST MAXIMUM-LIGHT ULTRAVIOLET THROUGH NEAR-INFRARED SPECTRUM OF A TYPE Ia SUPERNOVA  

Science Conference Proceedings (OSTI)

We present the first maximum-light ultraviolet (UV) through near-infrared (NIR) Type Ia supernova (SN Ia) spectrum. This spectrum of SN 2011iv was obtained nearly simultaneously by the Hubble Space Telescope at UV/optical wavelengths and the Magellan Baade telescope at NIR wavelengths. These data provide the opportunity to examine the entire maximum-light SN Ia spectral energy distribution. Since the UV region of an SN Ia spectrum is extremely sensitive to the composition of the outer layers of the explosion, which are transparent at longer wavelengths, this unprecedented spectrum can provide strong constraints on the composition of the SN ejecta, and similarly the SN explosion and progenitor system. SN 2011iv is spectroscopically normal, but has a relatively fast decline ({Delta}m{sub 15}(B) = 1.69 {+-} 0.05 mag). We compare SN 2011iv to other SNe Ia with UV spectra near maximum light and examine trends between UV spectral properties, light-curve shape, and ejecta velocity. We tentatively find that SNe with similar light-curve shapes but different ejecta velocities have similar UV spectra, while those with similar ejecta velocities but different light-curve shapes have very different UV spectra. Through a comparison with explosion models, we find that both a solar-metallicity W7 and a zero-metallicity delayed-detonation model provide a reasonable fit to the spectrum of SN 2011iv from the UV to the NIR.

Foley, Ryan J.; Marion, G. Howie; Challis, Peter; Kirshner, Robert P.; Berta, Zachory K. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Kromer, Markus; Taubenberger, Stefan; Hillebrandt, Wolfgang; Roepke, Friedrich K.; Ciaraldi-Schoolmann, Franco; Seitenzahl, Ivo R. [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Strasse 1, D-85748 Garching bei Muenchen (Germany); Pignata, Giuliano [Departamento de Ciencias Fisicas, Universidad Andres Bello, Avda. Republica 252, Santiago (Chile); Stritzinger, Maximilian D. [Department of Physics and Astronomy, Aarhus University, Ny Munkegade, DK-8000 Aarhus C (Denmark); Filippenko, Alexei V.; Li Weidong; Silverman, Jeffrey M. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Folatelli, Gaston [Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), Todai Institutes for Advanced Study, University of Tokyo, Kashiwa 277-8583 (Japan); Hsiao, Eric Y.; Morrell, Nidia I. [Carnegie Observatories, Las Campanas Observatory, La Serena (Chile); Simcoe, Robert A., E-mail: rfoley@cfa.harvard.edu [MIT-Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Avenue, 37-664D Cambridge, MA 02139 (United States); and others

2012-07-01T23:59:59.000Z

58

Spectral Modeling of SNe Ia Near Maximum Light: Probing the Characteristics of Hydro Models  

E-Print Network (OSTI)

We have performed detailed NLTE spectral synthesis modeling of 2 types of 1-D hydro models: the very highly parameterized deflagration model W7, and two delayed detonation models. We find that overall both models do about equally well at fitting well observed SNe Ia near to maximum light. However, the Si II 6150 feature of W7 is systematically too fast, whereas for the delayed detonation models it is also somewhat too fast, but significantly better than that of W7. We find that a parameterized mixed model does the best job of reproducing the Si II 6150 line near maximum light and we study the differences in the models that lead to better fits to normal SNe Ia. We discuss what is required of a hydro model to fit the spectra of observed SNe Ia near maximum light.

E. Baron; S. Bongard; David Branch; Peter H. Hauschildt

2006-03-03T23:59:59.000Z

59

THE LOW-VELOCITY, RAPIDLY FADING TYPE Ia SUPERNOVA 2002es  

SciTech Connect

SN 2002es is a peculiar subluminous Type Ia supernova (SN Ia) with a combination of observed characteristics never before seen in an SN Ia. At maximum light, SN 2002es shares spectroscopic properties with the underluminous SN 1991bg subclass of SNe Ia, but with substantially lower expansion velocities ({approx}6000 km s{sup -1}) more typical of the peculiar SN 2002cx subclass. Photometrically, SN 2002es differs from both SN 1991bg-like and SN 2002cx-like supernovae. Although at maximum light it is subluminous (M{sub B} = -17.78 mag), SN 2002es has a relatively broad light curve ({Delta}m{sub 15}(B) = 1.28 {+-} 0.04 mag), making it a significant outlier in the light-curve width versus luminosity relationship. We estimate a {sup 56}Ni mass of 0.17 {+-} 0.05 M{sub Sun} synthesized in the explosion, relatively low for an SN Ia. One month after maximum light, we find an unexpected plummet in the bolometric luminosity. The late-time decay of the light curves is inconsistent with our estimated {sup 56}Ni mass, indicating that either the light curve was not completely powered by {sup 56}Ni decay or the ejecta became optically thin to {gamma}-rays within a month after maximum light. The host galaxy is classified as an S0 galaxy with little to no star formation, indicating that the progenitor of SN 2002es is likely from an old stellar population. We also present a less extensive data set for SN 1999bh, an object which shares similar photometric and spectroscopic properties. Both objects were found as part of the Lick Observatory Supernova Search, allowing us to estimate that these objects should account for 2.5% of SNe Ia within a fixed volume. Current theoretical models are unable to explain the observed characteristics of SN 2002es.

Ganeshalingam, Mohan; Li Weidong; Filippenko, Alexei V.; Silverman, Jeffrey M.; Shen, Ken J. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Chornock, Ryan; Foley, Ryan J.; Kirshner, Robert P.; Calkins, Mike [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Matheson, Thomas [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Milne, Peter, E-mail: mganesh@astro.berkeley.edu [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)

2012-06-01T23:59:59.000Z

60

EARLY PHASE OBSERVATIONS OF EXTREMELY LUMINOUS TYPE Ia SUPERNOVA 2009dc  

Science Conference Proceedings (OSTI)

We present early phase observations in optical and near-infrared wavelengths for the extremely luminous Type Ia supernova (SN Ia) 2009dc. The decline rate of the light curve is DELTAm{sub 15}(B) = 0.65 +- 0.03, which is one of the slowest among SNe Ia. The peak V-band absolute magnitude is estimated to be M{sub V} = -19.90 +- 0.15 mag if no host extinction is assumed. It reaches M{sub V} = -20.19 +- 0.19 mag if we assume the host extinction of A{sub V} = 0.29 mag. SN 2009dc belongs to the most luminous class of SNe Ia, like SNe 2003fg and 2006gz. Our JHK{sub s} -band photometry shows that this SN is also one of the most luminous SNe Ia in near-infrared wavelengths. We estimate the ejected {sup 56}Ni mass of 1.2 +- 0.3 M{sub sun} for the no host extinction case (and of 1.6 +- 0.4 M{sub sun} for the host extinction of A{sub V} = 0.29 mag). The C II lambda6580 absorption line remains visible until a week after the maximum brightness, in contrast to its early disappearance in SN 2006gz. The line velocity of Si II lambda6355 is about 8000 km s{sup -1} around the maximum, being considerably slower than that of SN 2006gz. The velocity of the C II line is similar to or slightly less than that of the Si II line around the maximum. The presence of the carbon line suggests that the thick unburned C+O layer remains after the explosion. Spectropolarimetric observations by Tanaka et al. indicate that the explosion is nearly spherical. These observational facts suggest that SN 2009dc is a super-Chandrasekhar mass SN Ia.

Yamanaka, M.; Arai, A.; Chiyonobu, S.; Fukazawa, Y.; Ikejiri, Y.; Itoh, R.; Komatsu, T.; Miyamoto, H. [Department of Physical Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526 (Japan); Kawabata, K. S. [Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Kinugasa, K.; Hashimoto, O.; Honda, S. [Gunma Astronomical Observatory, Takayama, Gunma 377-0702 (Japan); Tanaka, M. [Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); Imada, A.; Kuroda, D. [Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Asakuchi-shi, Okayama 719-0232 (Japan); Maeda, K.; Nomoto, K. [Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa (Japan); Kamata, Y. [National Astronomical Observatory of Japan, Osawa, Mitaka, Tokyo 181-8588 (Japan); Kawai, N. [Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan); Konishi, K., E-mail: myamanaka@hiroshima-u.ac.j [Institute for Cosmic Ray Research, University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba, 277-8582 (Japan)

2009-12-20T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Final Technical Report: Discovering the Nature of Dark Energy: Towards Better Distances from Type Ia Supernovae  

Science Conference Proceedings (OSTI)

The final technical report from the project "Discovering the Nature of Dark Energy: Towards Better Distances from Type Ia Supernovae" led at Rutgers the State University of New Jersey by Prof. Saurabh W. Jha is presented, including all publications resulting from this award.

Saurabh W. Jha

2012-10-03T23:59:59.000Z

62

Symbiotic stars as possible progenitors of SNe Ia: binary parameters and overall outlook  

E-Print Network (OSTI)

Symbiotic stars are interacting binaries in which the first-formed white dwarf accretes and burns material from a red giant companion. This paper aims at presenting physical characteristics of these objects and discussing their possible link with progenitors of type Ia supernovae.

Miko?ajewska, J

2011-01-01T23:59:59.000Z

63

g-MODE EXCITATION DURING THE PRE-EXPLOSIVE SIMMERING OF TYPE Ia SUPERNOVAE  

SciTech Connect

Prior to the explosive burning of a white dwarf (WD) that makes a Type Ia supernova (SN Ia), the star 'simmers' for {approx}10{sup 3} yr in a convecting, carbon-burning region. I estimate the excitation of g-modes by convection during this phase and explore their possible effect on the WD. As these modes propagate from the core of the WD toward its surface, their amplitudes grow with decreasing density. Once the modes reach nonlinear amplitudes, they break and deposit their energy into a shell of mass {approx}10{sup -4} M{sub sun}. This raises the surface temperature by {approx}4 x 10{sup 8} K, which is sufficient to ignite a layer of helium, as is expected to exist for some SN Ia scenarios. This predominantly synthesizes {sup 40}Ca, but some amount of {sup 28}Si, {sup 32}S, and {sup 44}Ti may also be present. These ashes are expanded out with the subsequent explosion up to velocities of {approx}20, 000 km s{sup -1}, which may explain the high velocity features (HVFs) seen in many SNe Ia. The appearance of HVFs would therefore be a useful discriminant for determining between progenitors, since a flammable helium-rich layer will not be present for accretion from a C/O WD as in a merger scenario. I also discuss the implications of {sup 44}Ti production.

Piro, Anthony L., E-mail: piro@caltech.edu [Theoretical Astrophysics, California Institute of Technology, 1200 E California Blvd., M/C 350-17, Pasadena, CA 91125 (United States)

2011-09-01T23:59:59.000Z

64

Flames in Type Ia Supernova: Deflagration-Detonation Transition in the Oxygen Burning Flame  

E-Print Network (OSTI)

Flames in Type Ia Supernova: Deflagration-Detonation Transition in the Oxygen Burning Flame S. E structure which, de- pending on density, may involve separate regions of carbon, oxygen and silicon burning, all propagating in a self-similar, subsonic front. The separation between these three burning regions

65

A Test for the Nature of the Type Ia Supernova Explosion Mechanism  

E-Print Network (OSTI)

Currently popular models for Type Ia supernovae (SNe Ia) fall into two general classes. The first comprises explosions of nearly pure carbon/oxygen (C/O) white dwarfs at the Chandrasekhar limit which ignite near their centers. The second consists of lower-mass C/O cores which are ignited by the detonation of an accreted surface helium layer. Explosions of the latter type produce copious Fe, Co and Ni K-alpha emission from 56Ni and 56Co decay in the detonated surface layers, emission which is much weaker from Chandrasekhar-mass models. The presence of this emission provides a simple and unambiguous discriminant between these two models for SNe Ia. Both mechanisms may produce 0.1-0.6 solar masses of 56Ni, making them bright gamma-ray line emitters. The time to maximum brightness of 56Ni decay lines is distinctly shorter in the sub-Chandrasekhar mass class of model (approximately 15 days) than in the Chandrasekhar mass model (approximately 30 days), making gamma-ray line evolution another direct test of the explosion mechanism. It should just be possible to detect K-shell emission from a sub-Chandrasekhar explosion from SNe Ia as far away as the Virgo cluster with the XMM Observatory. A 1 to 2 square meter X-ray telescope such as the proposed Con-X Observatory could observe K-alpha emission from sub-Chandrasekhar mass SNe Ia in the Virgo cluster, providing not just a detection, but high-accuracy flux and kinematic information.

Philip A. Pinto; Ronald G. Eastman; Tamara Rogers

2000-08-21T23:59:59.000Z

66

WHITE DWARF/M DWARF BINARIES AS SINGLE DEGENERATE PROGENITORS OF TYPE Ia SUPERNOVAE  

SciTech Connect

Limits on the companions of white dwarfs in the single-degenerate scenario for the origin of Type Ia supernovae (SNe Ia) have gotten increasingly tight, yet igniting a nearly Chandrasekhar mass C/O white dwarf from a condition of near hydrostatic equilibrium provides compelling agreement with observed spectral evolution. The only type of non-degenerate stars that survive the tight limits, M{sub V} {approx}> 8.4 on the SN Ia in SNR 0509-67.5 and M{sub V} {approx}> 9.5 in the remnant of SN 1572, are M dwarfs. While M dwarfs are observed in cataclysmic variables, they have special properties that have not been considered in most work on the progenitors of SNe Ia: they have small but finite magnetic fields and they flare frequently. These properties are explored in the context of SN Ia progenitors. White dwarf/M dwarf pairs may be sufficiently plentiful to provide, in principle, an adequate rate of explosions even with slow orbital evolution due to magnetic braking or gravitational radiation. Even modest magnetic fields on the white dwarf and M dwarf will yield adequate torques to lock the two stars together, resulting in a slowly rotating white dwarf, with the magnetic poles pointing at one another in the orbital plane. The mass loss will be channeled by a 'magnetic bottle' connecting the two stars, landing on a concentrated polar area on the white dwarf. This enhances the effective rate of accretion compared to spherical accretion. Luminosity from accretion and hydrogen burning on the surface of the white dwarf may induce self-excited mass transfer. The combined effects of self-excited mass loss, polar accretion, and magnetic inhibition of mixing of accretion layers give possible means to beat the 'nova limit' and grow the white dwarf to the Chandrasekhar mass even at rather moderate mass accretion rates.

Wheeler, J. Craig, E-mail: wheel@astro.as.utexas.edu [Department of Astronomy, University of Texas at Austin, Austin, TX 78712 (United States)

2012-10-20T23:59:59.000Z

67

File:USDA-CE-Production-GIFmaps-IA.pdf | Open Energy Information  

Open Energy Info (EERE)

IA.pdf IA.pdf Jump to: navigation, search File File history File usage Iowa Ethanol Plant Locations Size of this preview: 776 × 600 pixels. Full resolution ‎(1,650 × 1,275 pixels, file size: 303 KB, MIME type: application/pdf) Description Iowa Ethanol Plant Locations Sources United States Department of Agriculture Related Technologies Biomass, Biofuels, Ethanol Creation Date 2010-01-19 Extent State Countries United States UN Region Northern America States Iowa External links http://www.nass.usda.gov/Charts_and_Maps/Ethanol_Plants/ File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 16:13, 27 December 2010 Thumbnail for version as of 16:13, 27 December 2010 1,650 × 1,275 (303 KB) MapBot (Talk | contribs) Automated bot upload

68

Constraining the spin-down timescale of the white-dwarf progenitors of Type Ia supernovae  

E-Print Network (OSTI)

Justham (2011) and DiStefano et al.\\ (2011) proposed that the white-dwarf progenitor of a Type Ia supernova (SN Ia) may have to spin down before it can explode. As the white dwarf spin-down timescale is not well known theoretically, we here try to constrain it empirically (within the framework of this spin-down model) for progenitor systems that contain a giant donor and for which circumbinary material has been detected after the explosion: we obtain an upper limit of a few $10^{\\rm 7} {\\rm yr}$. Based on the study of Di Stefano & Kilic (2012) this means that it is too early to rule out the existence of a surviving companion in SNR 0509-67.5.

Meng, Xiangcun

2013-01-01T23:59:59.000Z

69

Integral Airframe Structures (IAS)---Validated Feasibility Study of Integrally Stiffened Metallic Fuselage Panels for Reducing Manufacturing Costs  

Science Conference Proceedings (OSTI)

The Integral Airframe Structures (IAS) program investigated the feasibility of using "integrally stiffened" construction for commercial transport fuselage structure. The objective of the program was to demonstrate structural performance and weight equal ...

Munroe J.; Wilkins K.; Gruber M.

2000-05-01T23:59:59.000Z

70

In vivo cofactor biosynthesis and maintenance in the class Ia ribonucleotide reductase small subunit of Escherichia coli  

E-Print Network (OSTI)

The small subunit ([beta]2) of Escherichia coli class Ia ribonucleotide reductases (RNRs) contains a diferric tyrosyl radical (Y*) cofactor essential for the conversion of nucleotides to deoxynucleotides that are needed ...

Wu, Chia-Hung, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

71

Generation of a stable, aminotyrosyl radical-induced ?2?2 complex of Escherichia coli class Ia ribonucleotide reductase  

E-Print Network (OSTI)

Ribonucleotide reductase (RNR) catalyzes the conversion of nucleoside diphosphates to deoxynucleoside diphosphates (dNDPs). The Escherichia coli class Ia RNR uses a mechanism of radical propagation by which a cysteine in ...

Minnihan, Ellen Catherine

72

SELF-SHIELDING OF SOFT X-RAYS IN TYPE Ia SUPERNOVA PROGENITORS  

SciTech Connect

There are insufficient super-soft ({approx}0.1 keV) X-ray sources in either spiral or elliptical galaxies to account for the rate of explosion of Type Ia supernovae (SNe Ia) in either the single-degenerate or the double-degenerate scenarios. We quantify the amount of circumstellar matter that would be required to suppress the soft X-ray flux by yielding a column density in excess of 10{sup 23} cm{sup -2}. We summarize evidence that appropriate quantities of matter are extant in SNe Ia and in recurrent novae that may be supernova precursors. The obscuring matter is likely to have a large, but not complete, covering factor and to be substantially non-spherically symmetric. Assuming that much of the absorbed X-ray flux is re-radiated as blackbody radiation in the UV, we estimate that {approx}<100 sources might be detectable in the Galaxy Evolution Explorer All-sky Survey.

Wheeler, J. Craig [Department of Astronomy, University of Texas at Austin, Austin, TX (United States)] [Department of Astronomy, University of Texas at Austin, Austin, TX (United States); Pooley, D., E-mail: wheel@astro.as.utexas.edu [Department of Physics, Sam Houston State University, Huntsville, TX (United States)

2013-01-10T23:59:59.000Z

73

Restframe I-band Hubble diagram for type Ia supernovae up toredshift z ~; 0.5  

SciTech Connect

We present a novel technique for fitting rest frame I-bandlight curves on a data set of 42 type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the subset at 0.01 < z < 0.1. Adding two SNe at z {approx} 0.5 yields results consistent with a flat Lambda-dominated ''concordance universe'' (OmegaM,Omega Lambda) = (0.25, 0.75). For one of these, SN 2000fr, new near infrared data are presented. The high redshift supernova NIR data are also used to test for systematic effects in the use of SNe Ia as distance estimators. A flat, Lambda = 0, universe where the faintness of supernovae at z {approx} 0.5 is due to grey dust homogeneously distributed in the intergalactic medium is disfavored based on the high-z Hubble diagram using this small data-set. However, the uncertainties are large and no firm conclusion may be drawn. We explore the possibility of setting limits on intergalactic dust based on B - I and B - V color measurements, and conclude that about 20 well measured SNe are needed to give statistically significant results. We also show that the high redshift restframe I-band data points are better fit by light curve templates that show a prominent second peak, suggesting that they are not intrinsically underluminous.

Nobili, S.; Amanullah, R.; Garavini, G.; Goobar, A.; Lidman, C.; Stanishev, V.; Aldering, G.; Antilogus, P.; Astier, P.; Burns, M.S.; Conley, A.; Deustua, S.E.; Ellis, R.; Fabbro, S.; Fadeyev, V.; Folatelli,G.; Gibbons, R.; Goldhaber, G.; Groom, D.E.; Hook, I.; Howell, D.A.; Kim,A.G.; Knop, R.A.; Nugent, P.E.; Pain, R.; Perlmutter, S.; Quimby, R.; Raux, J.; Regnault, N.; Ruiz-Lapuente, P.; Sainton, G.; Schahmaneche, K.; Smith, E.; Spadafora, A.L.; Thomas, R.C.; Wang, L.

2005-04-01T23:59:59.000Z

74

Observational constraints from SNe Ia and Gamma-Ray Bursts on a clumpy universe  

E-Print Network (OSTI)

The luminosity distance describing the effect of local inhomogeneities in the propagation of light proposed by Zeldovich-Kantowski-Dyer-Roeder (ZKDR) is tested with two probes for two distinct ranges of redshifts: supernovae Ia (SNe Ia) in 0.015 gamma-ray bursts (GRBs) in 1.547 < z < 3.57. Our analysis is performed by a Markov Chain Monte Carlo (MCMC) code that allows us to constrain the matter density parameter \\Omega_m as well as the smoothness parameter $\\alpha$ that measures the inhomogeneous-homogeneous rate of the cosmic fluid in a flat \\LambdaCDM model. The obtained best fits are (\\Omega_m=0.285^{+0.019}_{-0.018}, \\alpha= 0.856^{+0.106}_{-0.176}) from SNe Ia and (\\Omega_m=0.259^{+0.028}_{-0.028}, \\alpha=0.587^{+0.201}_{-0.202}) from GRBs, while from the joint analysis the best fits are (\\Omega_m=0.284^{+0.021}_{-0.020}, \\alpha= 0.685^{+0.164}_{-0.171}) with a \\chi^2_{\\rm red}=0.975. The value of the smoothness parameter $\\alpha$ indicates a clumped universe however it does not have an impact on the amount of dark energy (cosmological constant) needed to fit observations. This result may be an indication that the Dyer-Roeder approximation does not describe in a precise form the effects of clumpiness in the expansion of the universe.

Nora Bretn; Ariadna Montiel

2013-03-06T23:59:59.000Z

75

The Cellular Burning Regime in Type Ia Supernova Explosions - I. Flame Propagation into Quiescent Fuel  

E-Print Network (OSTI)

We present a numerical investigation of the cellular burning regime in Type Ia supernova explosions. This regime holds at small scales (i.e. below the Gibson scale), which are unresolved in large-scale Type Ia supernova simulations. The fundamental effects that dominate the flame evolution here are the Landau-Darrieus instability and its nonlinear stabilization, leading to a stabilization of the flame in a cellular shape. The flame propagation into quiescent fuel is investigated addressing the dependence of the simulation results on the specific parameters of the numerical setup. Furthermore, we investigate the flame stability at a range of fuel densities. This is directly connected to the questions of active turbulent combustion (a mechanism of flame destabilization and subsequent self-turbulization) and a deflagration-to-detonation transition of the flame. In our simulations we find no substantial destabilization of the flame when propagating into quiescent fuels of densities down to ~10^7 g/cm^3, corroborating fundamental assumptions of large-scale SN Ia explosion models. For these models, however, we suggest an increased lower cutoff for the flame propagation velocity to take the cellular burning regime into account.

F. K. Roepke; W. Hillebrandt; J. C. Niemeyer

2003-12-03T23:59:59.000Z

76

Measurements of the Rate of Type Ia Supernovae at Redshift z < ~0.3 from the SDSS-II Supernova Survey  

E-Print Network (OSTI)

We present a measurement of the volumetric Type Ia supernova (SN Ia) rate based on data from the Sloan Digital Sky Survey II (SDSS-II) Supernova Survey. The adopted sample of supernovae (SNe) includes 516 SNe Ia at redshift z \\lesssim 0.3, of which 270 (52%) are spectroscopically identified as SNe Ia. The remaining 246 SNe Ia were identified through their light curves; 113 of these objects have spectroscopic redshifts from spectra of their host galaxy, and 133 have photometric redshifts estimated from the SN light curves. Based on consideration of 87 spectroscopically confirmed non-Ia SNe discovered by the SDSS-II SN Survey, we estimate that 2.04+1.61-0.95 % of the photometric SNe Ia may be misidentified. The sample of SNe Ia used in this measurement represents an order of magnitude increase in the statistics for SN Ia rate measurements in the redshift range covered by the SDSS-II Supernova Survey. If we assume a SN Ia rate that is constant at low redshift (z < 0.15), then the SN observations can be used t...

Dilday, Benjamin; Bassett, Bruce; Becker, Andrew; Bender, Ralf; Castander, Francisco; Cinabro, David; Filippenko, Alexei V; Frieman, Joshua A; Galbany, Lluis; Garnavich, Peter M; Goobar, Ariel; Hopp, Ulrich; Ihara, Yutaka; Jha, Saurabh W; Kessler, Richard; Lampeitl, Hubert; Marriner, John; Miquel, Ramon; Molla, Mercedes; Nichol, Robert C; Nordin, Jakob; Riess, Adam G; Sako, Masao; Schneider, Donald P; Sollerman, Jesper; Wheeler, J Craig; Ostman, Linda; Bizyaev, Dmitry; Brewington, Howard; Malanushenko, Elena; Malanushenko, Viktor; Oravetz, Dan; Pan, Kaike; Simmons, Audrey; Snedden, Stephanie

2010-01-01T23:59:59.000Z

77

Notes on the compatibility of type Ia supernovae data and varying--$G$ cosmology  

E-Print Network (OSTI)

Observational data for type Ia supernovae, shows that the expansion of the universe is accelerated. This accelerated expansion can be described by a cosmological constant or by dark energy models like quintessence. An interesting question may be raised here. Is it possible to describe the accelerated expansion of universe using varying--$G$ cosmological models? Here we shall show that the price for having accelerated expansion in slow--varying--$G$ models (in which the dynamical terms of $G$ are ignored) is to have highly non--conserved matter and also that it is in contradiction with other data.

Shojai, F

2013-01-01T23:59:59.000Z

78

On the hydrogen emission from the type Ia supernova 2002ic  

DOE Green Energy (OSTI)

The discovery of SN 2002ic by the Supernova Factory and the subsequent spectroscopic studies have led to the surprising finding that SN 2002ic is a type Ia supernova with strong ejecta-circumstellar interaction. Here we show that nearly 1 year after the explosion the supernova has become fainter overall, but the H-alpha emission has brightened and broadened dramatically compared to earlier observations. We have obtained spectropolarimetry data which show that the hydrogen-rich matter is highly aspherically distributed. These observations suggest that the supernova exploded inside a dense, clumpy, disk-like circumstellar environment.

Wang, Lifan; Baade, Dietrich; Hoflich, Peter; Wheeler, J. Craig; Kawabata, Koji; Nomoto, Ken'ichi

2003-12-10T23:59:59.000Z

79

Photometric Observations of the Type Ia SN 2002er in UGC 10743  

E-Print Network (OSTI)

Extensive light and colour curves for the Type Ia supernova SN 2002er are presented as part of the European Supernova Collaboration. We have collected UBVRI photometry from ten different telescopes covering the phases from 7 days before until 619 days after maximum light. Corrections for the different instrumental systems and the non-thermal spectrum of the supernova (S-corrections) have been applied. With the densely sampled light curves we can make detailed comparisons to other well-observed objects. SN 2002er most closely resembles SN 1996X after maximum, but clearly shows a different colour evolution before peak light and a stronger shoulder in V and R bands compared to other well-observed SNe Ia. In particular, the rise time appears to be longer than what is expected from rise-time vs.decline-rate relation. We use several methods to determine the reddening towards SN 2002er based on the colour evolution at near peak and at late phases. The uvoir (bolometric) light curve shows great similarity with SN 199...

Pignata, G; Benetti, S; Blinnikov, S; Hillebrandt, W; Kotak, R; Leibundgut, B; Mazzali, P A; Meikle, P; Qiu, Y; Ruiz-Lapuente, P; Smartt, S; Sorokina, E; Stritzinger, M; Stehle, M; Turatto, M; Marsh, T; Martin-Luis, F; McBride, N; Mndez, J; Morales-Rueda, L; Narbutis, D; Street, R

2004-01-01T23:59:59.000Z

80

The Cellular Burning Regime in Type Ia Supernova Explosions - II. Flame Propagation into Vortical Fuel  

E-Print Network (OSTI)

We investigate the interaction of thermonuclear flames in Type Ia supernova explosions with vortical flows by means of numerical simulations. In our study, we focus on small scales, where the flame propagation is no longer dominated by the turbulent cascade originating from large-scale effects. Here, the flame propagation proceeds in the cellular burning regime, resulting from a balance between the Landau-Darrieus instability and its nonlinear stabilization. The interaction of a cellularly stabilized flame front with a vortical fuel flow is explored applying a variety of fuel densities and strengths of the velocity fluctuations. We find that the vortical flow can break up the cellular flame structure if it is sufficiently strong. In this case the flame structure adapts to the imprinted flow field. The transition from the cellularly stabilized front to the flame structure dominated by vortices of the flow proceeds in a smooth way. The implications of the results of our simulations for Type Ia Supernova explosion models are discussed.

F. K. Roepke; W. Hillebrandt; J. C. Niemeyer

2003-12-08T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Flame Evolution During Type Ia Supernovae and the Deflagration Phase in the Gravitationally Confined Detonation Scenario  

E-Print Network (OSTI)

We develop an improved method for tracking the nuclear flame during the deflagration phase of a Type Ia supernova, and apply it to study the variation in outcomes expected from the gravitationally confined detonation (GCD) paradigm. A simplified 3-stage burning model and a non-static ash state are integrated with an artificially thickened advection-diffusion-reaction (ADR) flame front in order to provide an accurate but highly efficient representation of the energy release and electron capture in and after the unresolvable flame. We demonstrate that both our ADR and energy release methods do not generate significant acoustic noise, as has been a problem with previous ADR-based schemes. We proceed to model aspects of the deflagration, particularly the role of buoyancy of the hot ash, and find that our methods are reasonably well-behaved with respect to numerical resolution. We show that if a detonation occurs in material swept up by the material ejected by the first rising bubble but gravitationally confined to the white dwarf (WD) surface (the GCD paradigm), the density structure of the WD at detonation is systematically correlated with the distance of the deflagration ignition point from the center of the star. Coupled to a suitably stochastic ignition process, this correlation may provide a plausible explanation for the variety of nickel masses seen in Type Ia Supernovae.

D. M. Townsley; A. C. Calder; S. M. Asida; I. R. Seitenzahl; F. Peng; N. Vladimirova; D. Q. Lamb; J. W. Truran

2007-06-07T23:59:59.000Z

82

Flame-driven deflagration-to-detonation transitions in Type Ia supernovae?  

E-Print Network (OSTI)

Although delayed detonation models of thermonuclear explosions of white dwarfs seem promising for reproducing Type Ia supernovae, the transition of the flame propagation mode from subsonic deflagration to supersonic detonation remains hypothetical. A potential instant for this transition to occur is the onset of the distributed burning regime, i.e. the moment when turbulence first affects the internal flame structure. Some studies of the burning microphysics indicate that a deflagration-to-detonation transition may be possible here, provided the turbulent intensities are strong enough. Consequently, the magnitude of turbulent velocity fluctuations generated by the deflagration flame is analyzed at the onset of the distributed burning regime in several three-dimensional simulations of deflagrations in thermonuclear supernovae. It is shown that the corresponding probability density functions fall off towards high turbulent velocity fluctuations much more slowly than a Gaussian distribution. Thus, values claimed to be necessary for triggering a detonation are likely to be found in sufficiently large patches of the flame. Although the microphysical evolution of the burning is not followed and a successful deflagration-to-detonation transition cannot be guaranteed from simulations presented here, the results still indicate that such events may be possible in Type Ia supernova explosions.

F. K. Roepke

2007-09-26T23:59:59.000Z

83

Verifying the Cosmological Utility of Type Ia Supernovae:Implications of a Dispersion in the Ultraviolet Spectra  

SciTech Connect

We analyze the mean rest-frame ultraviolet (UV) spectrum ofType Ia Supernovae(SNe) and its dispersion using high signal-to-noiseKeck-I/LRIS-B spectroscopyfor a sample of 36 events at intermediateredshift (z=0.5) discoveredby the Canada-France-Hawaii TelescopeSupernova Legacy Survey (SNLS). Weintroduce a new method for removinghost galaxy contamination in our spectra,exploiting the comprehensivephotometric coverage of the SNLS SNe and theirhost galaxies, therebyproviding the first quantitative view of the UV spectralproperties of alarge sample of distant SNe Ia. Although the mean SN Ia spectrumhas notevolved significantly over the past 40 percent of cosmic history,preciseevolutionary constraints are limited by the absence of acomparable sample ofhigh quality local spectra. The mean UV spectrum ofour z 0.5 SNe Ia and itsdispersion is tabulated for use in futureapplications. Within the high-redshiftsample, we discover significant UVspectral variations and exclude dust extinctionas the primary cause byexamining trends with the optical SN color. Although progenitormetallicity may drive some of these trends, the variations we see aremuchlarger than predicted in recent models and do not follow expectedpatterns.An interesting new result is a variation seen in the wavelengthof selected UVfeatures with phase. We also demonstrate systematicdifferences in the SN Iaspectral features with SN lightcurve width inboth the UV and the optical. Weshow that these intrinsic variations couldrepresent a statistical limitation in thefuture use of high-redshift SNeIa for precision cosmology. We conclude thatfurther detailed studies areneeded, both locally and at moderate redshift wherethe rest-frame UV canbe studied precisely, in order that future missions canconfidently beplanned to fully exploit SNe Ia as cosmological probes.

Ellis, R.S.; Sullivan, M.; Nugent, P.E.; Howell, D.A.; Gal-Yam,A.; Astier, P.; Balam, D.; Balland, C.; Basa, S.; Carlberg, R.G.; Conley,A.; Fouchez, D.; Guy, J.; Hardin, D.; Hook, I.; Pain, R.; Perrett, K.; Pritchet, C.J.; Regnault, N.

2007-11-02T23:59:59.000Z

84

LATE-TIME SPECTRAL OBSERVATIONS OF THE STRONGLY INTERACTING TYPE Ia SUPERNOVA PTF11kx  

SciTech Connect

PTF11kx was a Type Ia supernova (SN Ia) that showed time-variable absorption features, including saturated Ca II H and K lines that weakened and eventually went into emission. The strength of the emission component of H{alpha} gradually increased, implying that the SN was undergoing significant interaction with its circumstellar medium (CSM). These features, and many others, were blueshifted slightly and showed a P-Cygni profile, likely indicating that the CSM was directly related to, and probably previously ejected by, the progenitor system itself. These and other observations led Dilday et al. to conclude that PTF11kx came from a symbiotic nova progenitor like RS Oph. In this work we extend the spectral coverage of PTF11kx to 124-680 rest-frame days past maximum brightness. The late-time spectra of PTF11kx are dominated by H{alpha} emission (with widths of full width at half-maximum intensity Almost-Equal-To 2000 km s{sup -1}), strong Ca II emission features ({approx}10,000 km s{sup -1} wide), and a blue 'quasi-continuum' due to many overlapping narrow lines of Fe II. Emission from oxygen, He I, and Balmer lines higher than H{alpha} is weak or completely absent at all epochs, leading to large observed H{alpha}/H{beta} intensity ratios. The H{alpha} emission appears to increase in strength with time for {approx}1 yr, but it subsequently decreases significantly along with the Ca II emission. Our latest spectrum also indicates the possibility of newly formed dust in the system as evidenced by a slight decrease in the red wing of H{alpha}. During the same epochs, multiple narrow emission features from the CSM temporally vary in strength. The weakening of the H{alpha} and Ca II emission at late times is possible evidence that the SN ejecta have overtaken the majority of the CSM and agrees with models of other strongly interacting SNe Ia. The varying narrow emission features, on the other hand, may indicate that the CSM is clumpy or consists of multiple thin shells.

Silverman, Jeffrey M. [Department of Astronomy, University of Texas, Austin, TX 78712-0259 (United States); Nugent, Peter E.; Filippenko, Alexei V.; Cenko, S. Bradley [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Gal-Yam, Avishay [Benoziyo Center for Astrophysics, The Weizmann Institute of Science, Rehovot 76100 (Israel); Sullivan, Mark [School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ (United Kingdom); Howell, D. Andrew [Las Cumbres Observatory Global Telescope Network, Goleta, CA 93117 (United States); Pan, Yen-Chen; Hook, Isobel M., E-mail: jsilverman@astro.as.utexas.edu [Department of Physics (Astrophysics), University of Oxford, Keble Road, Oxford OX1 3RH (United Kingdom)

2013-08-01T23:59:59.000Z

85

A Precision Photometric Comparison between SDSS-II and CSP Type Ia Supernova Data  

Science Conference Proceedings (OSTI)

Consistency between Carnegie Supernova Project (CSP) and SDSS-II Supernova Survey ugri measurements has been evaluated by comparing Sloan Digital Sky Survey (SDSS) and CSP photometry for nine spectroscopically confirmed Type Ia supernova observed contemporaneously by both programs. The CSP data were transformed into the SDSS photometric system. Sources of systematic uncertainty have been identified, quantified, and shown to be at or below the 0.023 mag level in all bands. When all photometry for a given band is combined, we find average magnitude differences of equal to or less than 0.011 mag in ugri, with rms scatter ranging from 0.043 to 0.077 mag. The u-band agreement is promising, with the caveat that only four of the nine supernovae are well observed in u and these four exhibit an 0.038 mag supernova-to-supernova scatter in this filter.

Mosher, J.; /Pennsylvania U.; Sako, M.; /Pennsylvania U.; Corlies, L.; /Pennsylvania U. /Columbia U.; Folatelli, G.; /Tokyo U. /Carnegie Inst. Observ.; Frieman, J.; /Chicago U., KICP /Chicago U., Astron. Astrophys. Ctr.; Holtzman, J.; /New Mexico State U.; Jha, S.W.; /Rutgers U., Piscataway; Kessler, R.; /Chicago U., Astron. Astrophys. Ctr. /Chicago U., KICP; Marriner, J.; /Fermilab; Phillips, M.M.; /Carnegie Inst. Observ.; Stritzinger, M.; /Aarhus U. /Stockholm U., OKC /Bohr Inst. /Carnegie Inst. Observ.

2012-06-01T23:59:59.000Z

86

A PRECISION PHOTOMETRIC COMPARISON BETWEEN SDSS-II AND CSP TYPE Ia SUPERNOVA DATA  

SciTech Connect

Consistency between Carnegie Supernova Project (CSP) and SDSS-II Supernova Survey ugri measurements has been evaluated by comparing Sloan Digital Sky Survey (SDSS) and CSP photometry for nine spectroscopically confirmed Type Ia supernova observed contemporaneously by both programs. The CSP data were transformed into the SDSS photometric system. Sources of systematic uncertainty have been identified, quantified, and shown to be at or below the 0.023 mag level in all bands. When all photometry for a given band is combined, we find average magnitude differences of equal to or less than 0.011 mag in ugri, with rms scatter ranging from 0.043 to 0.077 mag. The u-band agreement is promising, with the caveat that only four of the nine supernovae are well observed in u and these four exhibit an 0.038 mag supernova-to-supernova scatter in this filter.

Mosher, J.; Sako, M.; Corlies, L. [Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Folatelli, G. [Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan); Frieman, J.; Kessler, R. [Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States); Holtzman, J. [Department of Astronomy, MSC 4500, New Mexico State University, P.O. Box 30001, Las Cruces, NM 88003 (United States); Jha, S. W. [Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Marriner, J. [Center for Particle Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Phillips, M. M.; Morrell, N. [Las Campanas Observatory, Carnegie Observatories, Casilla 601, La Serena (Chile); Stritzinger, M. [Oskar Klein Centre for Cosmo Particle Physics, AlbaNova University Center, 106 91 Stockholm (Sweden); Schneider, D. P., E-mail: jmosher@sas.upenn.edu [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802 (United States)

2012-07-15T23:59:59.000Z

87

A Precision Photometric Comparison between SDSS-II and CSP Type Ia Supernova Data  

E-Print Network (OSTI)

Consistency between Carnegie Supernova Project (CSP) and SDSS-II supernova (SN) survey ugri measurements has been evaluated by comparing SDSS and CSP photometry for nine spectroscopically confirmed Type Ia supernova observed contemporaneously by both programs. The CSP data were transformed into the SDSS photometric system. Sources of systematic uncertainty have been identified, quantified, and shown to be at or below the 0.023 magnitude level in all bands. When all photometry for a given band is combined, we find average magnitude differences of equal to or less than 0.011 magnitudes in ugri, with rms scatter ranging from 0.043 to 0.077 magnitudes. The u band agreement is promising, with the caveat that only four of the nine supernovae are well-observed in u and these four exhibit an 0.038 magnitude supernova-to-supernova scatter in this filter.

Mosher, J; Corlies, L; Folatelli, G; Frieman, J; Holtzman, J; Jha, S W; Kessler, R; Marriner, J; Phillips, M M; Stritzinger, M; Morrell, N; Schneider, D P

2012-01-01T23:59:59.000Z

88

Analysis of Reaction-Diffusion Systems for Flame Capturing in Type Ia Supernova Simulations  

E-Print Network (OSTI)

We present a study of numerical behavior of a thickened flame used in Flame Capturing (FC, Khokhlov (1995)) for tracking thin unresolved physical flames in deflagration simulations. We develop a steady-state procedure for calibrating the flame model used, and test it against analytical results. We observe numerical noises generated by original realization of the technique. Alternative artificial burning rates are discussed, which produce acceptably quiet flames. Two new quiet models are calibrated to yield required "flame" speed and width, and further studied in 2D and 3D setting. Landau-Darrieus type instabilities of the flames are observed. One model also shows significantly anisotropic propagation speed on the grid, both effects increasingly pronounced at larger matter expansion as a result of burning; this makes the model unacceptable for use in type Ia supernova simulations. Another model looks promising for use in flame capturing at fuel to ash density ratio of order 3 and below. That "Model B" yields f...

Zhiglo, Andrey V

2009-01-01T23:59:59.000Z

89

ASD(NII)/DoD CIO SUBJECT: Defense Industrial Base (DIB) Cyber Security/Information Assurance (CS/IA) Activities  

E-Print Network (OSTI)

directing the conduct of DIB CS/IA activities to protect unclassified DoD information, as defined in the Glossary, that transits or resides on unclassified DIB information systems and networks. 2. APPLICABILITY. This Instruction applies to OSD, the Military Departments, the Office of

unknown authors

2010-01-01T23:59:59.000Z

90

EARLY RADIO AND X-RAY OBSERVATIONS OF THE YOUNGEST NEARBY TYPE Ia SUPERNOVA PTF 11kly (SN 2011fe)  

SciTech Connect

On 2011 August 24 (UT) the Palomar Transient Factory (PTF) discovered PTF11kly (SN 2011fe), the youngest and most nearby Type Ia supernova (SN Ia) in decades. We followed this event up in the radio (centimeter and millimeter bands) and X-ray bands, starting about a day after the estimated explosion time. We present our analysis of the radio and X-ray observations, yielding the tightest constraints yet placed on the pre-explosion mass-loss rate from the progenitor system of this supernova. We find a robust limit of M-dot {approx}<10{sup -8}(w/100 km s{sup -1}) M{sub sun} yr{sup -1} from sensitive X-ray non-detections, as well as a similar limit from radio data, which depends, however, on assumptions about microphysical parameters. We discuss our results in the context of single-degenerate models for SNe Ia and find that our observations modestly disfavor symbiotic progenitor models involving a red giant donor, but cannot constrain systems accreting from main-sequence or sub-giant stars, including the popular supersoft channel. In view of the proximity of PTF11kly and the sensitivity of our prompt observations, we would have to wait for a long time (a decade or longer) in order to more meaningfully probe the circumstellar matter of SNe Ia.

Horesh, Assaf; Kulkarni, S. R.; Carpenter, John; Kasliwal, Mansi M.; Ofek, Eran O. [Cahill Center for Astrophysics, California Institute of Technology, Pasadena, CA 91125 (United States); Fox, Derek B. [Astronomy and Astrophysics, Eberly College of Science, Pennsylvania State University, University Park, PA 16802 (United States); Quimby, Robert [IPMU, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, Chiba (Japan); Gal-Yam, Avishay [Benoziyo Center for Astrophysics, Faculty of Physics, Weizmann Institute of Science, Rehovot 76100 (Israel); Cenko, S. Bradley [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); De Bruyn, A. G. [Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, NL-7990 AA Dwingeloo (Netherlands); Kamble, Atish; Wijers, Ralph A. M. J. [Center for Gravitation and Cosmology, University of Wisconsin, Milwaukee, WI 53211 (United States); Van der Horst, Alexander J. [Universities Space Research Association, NSSTC, Huntsville, AL 35805 (United States); Kouveliotou, Chryssa [Space Science Office, VP-62, NASA-Marshall Space Flight Center, Huntsville, AL 35805 (United States); Podsiadlowski, Philipp; Sullivan, Mark; Maguire, Kate [Department of Physics (Astrophysics), University of Oxford, Keble Road, Oxford OX1 3RH (United Kingdom); Howell, D. Andrew [Las Cumbres Observatory Global Telescope Network, Santa Barbara, CA 93117 (United States); Nugent, Peter E. [Computational Cosmology Center, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States); Gehrels, Neil [NASA-Goddard Space Flight Center, Greenbelt, MD 20771 (United States); and others

2012-02-10T23:59:59.000Z

91

Photometric Observations of the Type Ia SN 2002er in UGC 10743  

E-Print Network (OSTI)

Extensive light and colour curves for the Type Ia supernova SN 2002er are presented as part of the European Supernova Collaboration. We have collected UBVRI photometry from ten different telescopes covering the phases from 7 days before until 619 days after maximum light. Corrections for the different instrumental systems and the non-thermal spectrum of the supernova (S-corrections) have been applied. With the densely sampled light curves we can make detailed comparisons to other well-observed objects. SN 2002er most closely resembles SN 1996X after maximum, but clearly shows a different colour evolution before peak light and a stronger shoulder in V and R bands compared to other well-observed SNe Ia. In particular, the rise time appears to be longer than what is expected from rise-time vs.decline-rate relation. We use several methods to determine the reddening towards SN 2002er based on the colour evolution at near peak and at late phases. The uvoir (bolometric) light curve shows great similarity with SN 1996X, but also indications of a higher luminosity, longer rise time and a more pronounced shoulder 25 days past maximum. The interpretation of the light curves was done with two independent light curve codes. Both find that given the luminosity of SN 2002er the 56Ni mass exceeds 0.6 Msun with prefered values near 0.7 Msun. Uncertainties in the exact distance to SN 2002er are the most serious limitation of this measurement. The light curve modelling also indicates a high level of mixing of the nickel in the explosion of SN 2002er.

G. Pignata; F. Patat; S. Benetti; S. Blinnikov; W. Hillebrandt; R. Kotak; B. Leibundgut; P. A. Mazzali; P. Meikle; Y. Qiu; P. Ruiz-Lapuente; S. Smartt; E. Sorokina; M. Stritzinger; M. Stehle; M. Turatto; T. Marsh; F. Martin-Luis; N. McBride; J. Mendez; L. Morales-Rueda; D. Narbutis; R. Street

2004-08-12T23:59:59.000Z

92

Direct Analysis of Spectra of the Peculiar Type Ia Supernova 2000cx  

E-Print Network (OSTI)

The Type Ia SN 2000cx exhibited multiple peculiarities, including a lopsided B-band light-curve peak that does not conform to current methods for using shapes of light curves to standardize SN Ia luminosities. We use the parameterized supernova synthetic-spectrum code SYNOW to study line identifications in the photospheric-phase spectra of SN 2000cx. Previous work established the presence of Ca II infrared-triplet features forming above velocity about 20,000 km/s, much higher than the photospheric velocity of about 10,000 km/s. We find Ti II features forming at the same high velocity. High-velocity line formation is partly responsible for the photometric peculiarities of SN 2000cx: for example, B-band flux blocking by Ti II absorption features that decreases with time causes the B light curve to rise more rapidly and decline more slowly than it otherwise would. SN 2000cx contains an absorption feature near 4530 A that may be H-beta, forming at the same high velocity. The lack of conspicuous H-alpha and P-alpha signatures does not necessarily invalidate the H-beta identification if the high-velocity line formation is confined to a clump that partly covers the photosphere and the H-alpha and P-alpha source functions are elevated relative to that of resonance scattering. The H-beta identification is tentative. If it is correct, the high-velocity matter must have come from a nondegenerate companion star.

D. Branch; R. C. Thomas; E. Baron; D. Kasen; K. Hatano; K. Nomoto; A. V. Filippenko; W. Li; R. J. Rudy

2004-01-15T23:59:59.000Z

93

NUCLEOSYNTHESIS IN TWO-DIMENSIONAL DELAYED DETONATION MODELS OF TYPE Ia SUPERNOVA EXPLOSIONS  

SciTech Connect

For the explosion mechanism of Type Ia supernovae (SNe Ia), different scenarios have been suggested. In these, the propagation of the burning front through the exploding white dwarf (WD) star proceeds in different modes, and consequently imprints of the explosion model on the nucleosynthetic yields can be expected. The nucleosynthetic characteristics of various explosion mechanisms are explored based on three two-dimensional explosion simulations representing extreme cases: a pure turbulent deflagration, a delayed detonation following an approximately spherical ignition of the initial deflagration, and a delayed detonation arising from a highly asymmetric deflagration ignition. Apart from this initial condition, the deflagration stage is treated in a parameter-free approach. The detonation is initiated when the turbulent burning enters the distributed burning regime. This occurs at densities around 10{sup 7} g cm{sup -3}-relatively low as compared to existing nucleosynthesis studies for one-dimensional spherically symmetric models. The burning in these multidimensional models is different from that in one-dimensional simulations as the detonation wave propagates both into unburned material in the high-density region near the center of a WD and into the low-density region near the surface. Thus, the resulting yield is a mixture of different explosive burning products, from carbon-burning products at low densities to complete silicon-burning products at the highest densities, as well as electron-capture products synthesized at the deflagration stage. Detailed calculations of the nucleosynthesis in all three models are presented. In contrast to the deflagration model, the delayed detonations produce a characteristic layered structure and the yields largely satisfy constraints from Galactic chemical evolution. In the asymmetric delayed detonation model, the region filled with electron capture species (e.g., {sup 58}Ni, {sup 54}Fe) is within a shell, showing a large off-set, above the bulk of {sup 56}Ni distribution, while species produced by the detonation are distributed more spherically.

Maeda, K. [Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 (Japan); Roepke, F.K.; Fink, M.; Hillebrandt, W.; Travaglio, C. [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Strasse 1, 85741 Garching (Germany); Thielemann, F.-K., E-mail: keiichi.maeda@ipmu.j [Department Physik, Universitaet Basel, CH-4056 Basel (Switzerland)

2010-03-20T23:59:59.000Z

94

Measurements of the Rate of Type Ia Supernovae at Redshift z < ~0.3 from the SDSS-II Supernova Survey  

Science Conference Proceedings (OSTI)

We present a measurement of the volumetric Type Ia supernova (SN Ia) rate based on data from the Sloan Digital Sky Survey II (SDSS-II) Supernova Survey. The adopted sample of supernovae (SNe) includes 516 SNe Ia at redshift z {approx}< 0.3, of which 270 (52%) are spectroscopically identified as SNe Ia. The remaining 246 SNe Ia were identified through their light curves; 113 of these objects have spectroscopic redshifts from spectra of their host galaxy, and 133 have photometric redshifts estimated from the SN light curves. Based on consideration of 87 spectroscopically confirmed non-Ia SNe discovered by the SDSS-II SN Survey, we estimate that 2.04{sub -0.95}{sup +1.61}% of the photometric SNe Ia may be misidentified. The sample of SNe Ia used in this measurement represents an order of magnitude increase in the statistics for SN Ia rate measurements in the redshift range covered by the SDSS-II Supernova Survey. If we assume a SN Ia rate that is constant at low redshift (z < 0.15), then the SN observations can be used to infer a value of the SN rate of r{sub V} = (2.69{sub -0.30-0.01}{sup +0.34+0.21}) x 10{sup -5} SNe yr{sup -1} Mpc{sup -3} (H{sub 0}/(70 km s{sup -1} Mpc{sup -1})){sup 3} at a mean redshift of {approx} 0.12, based on 79 SNe Ia of which 72 are spectroscopically confirmed. However, the large sample of SNe Ia included in this study allows us to place constraints on the redshift dependence of the SN Ia rate based on the SDSS-II Supernova Survey data alone. Fitting a power-law model of the SN rate evolution, r{sub V} (z) = A{sub p} x ((1+z)/(1+z{sub 0})){sup {nu}}, over the redshift range 0.0 < z < 0.3 with z{sub 0} = 0.21, results in A{sub p} = (3.43{sub -0.15}{sup +0.15}) x 10{sup -5} SNe yr{sup -1} Mpc{sup -3} (H{sub 0}/(70 km s{sup -1} Mpc{sup -1})){sup 3} and {nu} = 2.04{sub -0.89}{sup +0.90}.

Dilday, Benjamin; /Rutgers U., Piscataway /Chicago U. /KICP, Chicago; Smith, Mathew; /Cape Town U., Dept. Math. /Portsmouth U.; Bassett, Bruce; /Cape Town U., Dept. Math. /South African Astron. Observ.; Becker, Andrew; /Washington U., Seattle, Astron. Dept.; Bender, Ralf; /Munich, Tech. U. /Munich U. Observ.; Castander, Francisco; /Barcelona, IEEC; Cinabro, David; /Wayne State U.; Filippenko, Alexei V.; /UC, Berkeley; Frieman, Joshua A.; /Chicago U. /Fermilab; Galbany, Lluis; /Barcelona, IFAE; Garnavich, Peter M.; /Notre Dame U. /Stockholm U., OKC /Stockholm U.

2010-01-01T23:59:59.000Z

95

Constraints on SN Ia progenitor time delays from high-z SNe and the star formation history  

E-Print Network (OSTI)

We re-assess the question of a systematic time delay between the formation of the progenitor and its explosion in a type Ia supernova (SN Ia) using the Hubble Higher-z Supernova Search sample (Strolger et al. 2004). While the previous analysis indicated a significant time delay, with a most likely value of 3.4 Gyr, effectively ruling out all previously proposed progenitor models, our analysis shows that the time-delay estimate is dominated by systematic errors, in particular due to uncertainties in the star-formation history. We find that none of the popular progenitor models under consideration can be ruled out with any significant degree of confidence. The inferred time delay is mainly determined by the peak in the assumed star-formation history. We show that, even with a much larger Supernova sample, the time delay distribution cannot be reliably reconstructed without better constraints on the star-formation history.

F. Frster; C. Wolf; Ph. Podsiadlowski; Z. Han

2006-01-19T23:59:59.000Z

96

A Measurement of the Rate of Type Ia Supernovae in Galaxy Clusters from the SDSS-II Supernova Survey  

Science Conference Proceedings (OSTI)

We present measurements of the Type Ia supernova (SN) rate in galaxy clusters based on data from the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. The cluster SN Ia rate is determined from 9 SN events in a set of 71 C4 clusters at z {le} 0.17 and 27 SN events in 492 maxBCG clusters at 0.1 {le} z {le} 0.3. We find values for the cluster SN Ia rate of (0.37{sub -0.12-0.01}{sup +0.17+0.01}) SNur h{sup 2} and (0.55{sub -0.11-0.01}{sup +0.13+0.02}) SNur h{sup 2} (SNux = 10{sup -12}L{sub x{circle_dot}}{sup -1} yr{sup -1}) in C4 and maxBCG clusters, respectively, where the quoted errors are statistical and systematic, respectively. The SN rate for early-type galaxies is found to be (0.31{sub -0.12-0.01}{sup +0.18+0.01}) SNur h{sup 2} and (0.49{sub -0.11-0.01}{sup +0.15+0.02}) SNur h{sup 2} in C4 and maxBCG clusters, respectively. The SN rate for the brightest cluster galaxies (BCG) is found to be (2.04{sub -1.11-0.04}{sup +1.99+0.07}) SNur h{sup 2} and (0.36{sub -0.30-0.01}{sup +0.84+0.01}) SNur h{sup 2} in C4 and maxBCG clusters, respectively. The ratio of the SN Ia rate in cluster early-type galaxies to that of the SN Ia rate in field early-type galaxies is 1.94{sub -0.91-0.015}{sup +1.31+0.043} and 3.02{sub -1.03-0.048}{sup +1.31+0.062}, for C4 and maxBCG clusters, respectively. The SN rate in galaxy clusters as a function of redshift, which probes the late time SN Ia delay distribution, shows only weak dependence on redshift. Combining our current measurements with previous measurements, we fit the cluster SN Ia rate data to a linear function of redshift, and find r{sub L} = [(0.49{sub -0.14}{sup +0.15}) + (0.91{sub -0.81}{sup +0.85}) x z] SNuB h{sup 2}. A comparison of the radial distribution of SNe in cluster to field early-type galaxies shows possible evidence for an enhancement of the SN rate in the cores of cluster early-type galaxies. With an observation of at most 3 hostless, intra-cluster SNe Ia, we estimate the fraction of cluster SNe that are hostless to be (9.4{sub -5.1}{sup +8.3})%.

Dilday, Benjamin; /Rutgers U., Piscataway /Chicago U. /KICP, Chicago; Bassett, Bruce; /Cape Town U., Dept. Math. /South African Astron. Observ.; Becker, Andrew; /Washington U., Seattle, Astron. Dept.; Bender, Ralf; /Munich, Tech. U. /Munich U. Observ.; Castander, Francisco; /Barcelona, IEEC; Cinabro, David; /Wayne State U.; Frieman, Joshua A.; /Chicago U. /Fermilab; Galbany, Lluis; /Barcelona, IFAE; Garnavich, Peter; /Notre Dame U.; Goobar, Ariel; /Stockholm U., OKC /Stockholm U.; Hopp, Ulrich; /Munich, Tech. U. /Munich U. Observ. /Tokyo U.

2010-03-01T23:59:59.000Z

97

LAX XXlCfl jX?iK, Idd+?KYLViG?IA  

Office of Legacy Management (LM)

f f , : I~&l, samtier cipwati8Aa CffUm - . Jiux.lCJ d,# 1754 - - _- - .- t :; . Jesse e. ahizmn*~*ter -2.' -------- - _ &tV' hi@A l f izau Bkteriala ;' . . 1 -7 I _' i' . Fpr&G& r&Q Q,&& fu &fI& L;&& -l&d 2;,i' iI,;/Qi' rIGN CQ&GgJy p;E& p;~p>gyf LAX XXlCfl jX?iK, Idd+?KYLViG?IA i-icfer~~o is &o ta yaw rwarandu3;: l P iimwmbec L?, 1953, reque&in~ a d&q.&ti of khority tA A&sister prog= for th+zz developmrrrl, Ii-&k& & acyui8itti ef c;uYletit*type and reswitlitc-type urtim bi:aPing eres and far t3-u jx*uctim and acquisitian 6f W ;aniU CCm- csa:ratc~ fhzi awes wit2n Lhe Six&e of Pemlsyzvania. 1 da not b&i- the projscrt fmr the pkcch2670 +S eroa from i&d.&

98

Prospects for Type Ia Supernova explosion mechanism identification with gamma rays  

E-Print Network (OSTI)

The explosion mechanism associated with thermonuclear supernovae (SNIa) is still a matter of debate. There is a wide agreement that high amounts of of radioactive nuclei are produced during these events and they are expected to be strong gamma-ray emitters. In the past, several authors have investigated the use of this gamma-ray emission as a diagnostic tool. In this paper we have done a complete study of the gamma-ray spectra associated with all the different scenarios currently proposed. This includes detonation, delayed detonation, deflagration and the off-center detonation. We have performed accurate simulations for this complete set of models in order to determine the most promising spectral features that could be used to discriminate among the different models. Our study is not limited to qualitative arguments. Instead, we have quantified the differences among the spectra and established distance limits for their detection. The calculations have been performed considering the best current response estimations of the SPI and IBIS instruments aboard INTEGRAL in such a way that our results can be used as a guideline to evaluate the capabilities of INTEGRAL in the study of type Ia supernovae. For the purpose of completeness we have also investigated the nuclear excitation and spallation reactions as a possible secondary source of gamma-rays present in some supernova scenarios. We conclude that this mechanism can be neglected due to its small contribution.

Jordi Gomez-Gomar; Jordi Isern; Pierre Jean

1997-09-05T23:59:59.000Z

99

EVALUATING SYSTEMATIC DEPENDENCIES OF TYPE Ia SUPERNOVAE: THE INFLUENCE OF CENTRAL DENSITY  

SciTech Connect

We present a study exploring a systematic effect on the brightness of Type Ia supernovae using numerical models that assume the single-degenerate paradigm. Our investigation varied the central density of the progenitor white dwarf at flame ignition, and considered its impact on the explosion yield, particularly the production and distribution of radioactive {sup 56}Ni, which powers the light curve. We performed a suite of two-dimensional simulations with randomized initial conditions, allowing us to characterize the statistical trends that we present. The simulations indicate that the production of Fe-group material is statistically independent of progenitor central density, but the mass of stable Fe-group isotopes is tightly correlated with central density, with a decrease in the production of {sup 56}Ni at higher central densities. These results imply that progenitors with higher central densities produce dimmer events. We provide details of the post-explosion distribution of {sup 56}Ni in the models, including the lack of a consistent centrally located deficit of {sup 56}Ni, which may be compared to observed remnants. By performing a self-consistent extrapolation of our model yields and considering the main-sequence lifetime of the progenitor star and the elapsed time between the formation of the white dwarf and the onset of accretion, we develop a brightness-age relation that improves our prediction of the expected trend for single degenerates and we compare this relation with observations.

Krueger, Brendan K.; Jackson, Aaron P.; Calder, Alan C. [Department of Physics and Astronomy, State University of New York-Stony Brook, Stony Brook, NY (United States); Townsley, Dean M. [Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL (United States); Brown, Edward F. [Department of Physics and Astronomy, Michigan State University, East Lansing, MI (United States); Timmes, Francis X., E-mail: brendan.krueger@stonybrook.edu [Joint Institute for Nuclear Astrophysics, Notre Dame, IN (United States)

2012-10-01T23:59:59.000Z

100

Phenomenology for Supernova Ia Data Based on a New Cosmic Time  

E-Print Network (OSTI)

A new phenomenological theory for the expansion of our universe is presented. Because fundamental supporting theory is still in development, its discussion is not presented in this paper. The theory is based on a new algebraic expression for cosmic time G Rho t^2=3/32Pi, which correctly predicts the WMAP measured cosmological constants and the fundamental Hubble parameter H(t) for the expansion of the universe. A replacement for dark matter, called here "dark mass", is proposed which scales as with the expansion and incorporated. It does not react with ordinary matter, except gravitationally, and produces flat rotational curves for spiral galaxies. Also a new expression for the approaching velocity of radiation in a closed 3-sphere expanding universe is given that accounts for the early degrading negative approach of radiation for z > 1.7. The expression is v = Hr-c. Combining these three elements produces a luminosity distance dL that successfully predicts the apparent magnitude of exploding supernova Ia stars and even the new gamma ray bursts with no need for dark energy or acceleration of the expansion of the universe.

Charles B. Leffert

2007-07-26T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

HIGH-RESOLUTION SIMULATIONS OF CONVECTION PRECEDING IGNITION IN TYPE Ia SUPERNOVAE USING ADAPTIVE MESH REFINEMENT  

E-Print Network (OSTI)

We extend our previous three-dimensional, full-star simulations of the final hours of convection preceding ignition in Type Ia supernovae to higher resolution using the adaptive mesh refinement capability of our low Mach number code, MAESTRO. We report the statistics of the ignition of the first flame at an effective 4.34 km resolution and general flow field properties at an effective 2.17 km resolution. We find that off-center ignition is likely, with radius of 50 km most favored and a likely range of 4075 km. This is consistent with our previous coarser (8.68 km resolution) simulations, implying that we have achieved sufficient resolution in our determination of likely ignition radii. The dynamics of the last few hot spots preceding ignition suggest that a multiple ignition scenario is not likely. With improved resolution, we can more clearly see the general flow pattern in the convective region, characterized by a strong outward plume with a lower speed recirculation. We show that the convective core is turbulent with a Kolmogorov spectrum and has a lower turbulent intensity and larger integral length scale than previously thought (on the order of 16 km s?1 and 200 km, respectively), and we discuss the potential consequences for the first flames. Key words: convection hydrodynamics methods: numerical nuclear reactions, nucleosynthesis, abundances supernovae: general white dwarfs Online-only material: color figures 1.

A. Nonaka; A. J. Aspden; M. Zingale; A. S. Almgren; J. B. Bell; S. E. Woosley

2012-01-01T23:59:59.000Z

102

Direct numerical simulations of type Ia supernovae flames II: The Rayleigh-Taylor instability  

Science Conference Proceedings (OSTI)

A Type Ia supernova explosion likely begins as a nuclear runaway near the center of a carbon-oxygen white dwarf. The outward propagating flame is unstable to the Landau-Darrieus, Rayleigh-Taylor, and Kelvin-Helmholtz instabilities, which serve to accelerate it to a large fraction of the speed of sound. We investigate the Rayleigh-Taylor unstable flame at the transition from the flamelet regime to the distributed-burning regime, around densities of 10e7 gm/cc, through detailed, fully resolved simulations. A low Mach number, adaptive mesh hydrodynamics code is used to achieve the necessary resolution and long time scales. As the density is varied, we see a fundamental change in the character of the burning--at the low end of the density range the Rayleigh-Taylor instability dominates the burning, whereas at the high end the burning suppresses the instability. In all cases, significant acceleration of the flame is observed, limited only by the size of the domain we are able to study. We discuss the implications of these results on the potential for a deflagration to detonation transition.

Bell, J.B.; Day, M.S.; Rendleman, C.A.; Woosley, S.E.; Zingale, M.

2004-01-12T23:59:59.000Z

103

Constraining deflagration models of Type Ia supernovae through intermediate-mass elements  

E-Print Network (OSTI)

The physical structure of a nuclear flame is a basic ingredient of the theory of Type Ia supernovae (SNIa). Assuming an exponential density reduction with several characteristic times we have followed the evolution of a planar nuclear flame in an expanding background from an initial density 6.6 10^7 g/cm3 down to 2 10^6 g/cm3. The total amount of synthesized intermediate-mass elements (IME), from silicon to calcium, was monitored during the calculation. We have made use of the computed mass fractions, X_IME, of these elements to give an estimation of the total amount of IME synthesized during the deflagration of a massive white dwarf. Using X_IME and adopting the usual hypothesis that turbulence decouples the effective burning velocity from the laminar flame speed, so that the relevant flame speed is actually the turbulent speed on the integral length-scale, we have built a simple geometrical approach to model the region where IME are thought to be produced. It turns out that a healthy production of IME invol...

Garca-Senz, D; Cabezon, R M; Woosley, S E

2006-01-01T23:59:59.000Z

104

Direct numerical simulations of type Ia supernovae flames I: The landau-darrieus instability  

SciTech Connect

Planar flames are intrinsically unstable in open domains due to the thermal expansion across the burning front--the Landau-Darrieus instability. This instability leads to wrinkling and growth of the flame surface, and corresponding acceleration of the flame, until it is stabilized by cusp formation. We look at the Landau-Darrieus in stability for C/O thermonuclear flames at conditions relevant to the late stages of a Type Ia supernova explosion. Two-dimensional direct numerical simulations of both single-mode and multi-mode perturbations using a low Mach number hydrodynamics code are presented. We show the effect of the instability on the flame speed as a function of both the density and domain size, demonstrate the existence of the small scale cutoff to the growth of the instability, and look for the proposed breakdown of the non-linear stabilization at low densities. The effects of curvature on the flame as quantified through measurements of the growth rate and computation of the corresponding Markstein number. While accelerations of a few percent are observed, they are too small to have any direct outcome on the supernova explosion.

Bell, J.B.; Day, M.S.; Rendleman, C.A.; Woosley, S.E.; Zingale, M.

2003-11-24T23:59:59.000Z

105

FLAMES IN TYPE Ia SUPERNOVA: DEFLAGRATION-DETONATION TRANSITION IN THE OXYGEN-BURNING FLAME  

Science Conference Proceedings (OSTI)

The flame in a Type Ia supernova is a conglomerate structure that, depending on density, may involve separate regions of carbon, oxygen, and silicon burning, all propagating in a self-similar, subsonic front. The separation between these three burning regions increases as the density declines until eventually, below about 2 x 10{sup 7} g cm{sup -3}, only carbon burning remains active, the other two burning phases having 'frozen out' on stellar scales. Between 2 and 3 x 10{sup 7} g cm{sup -3}, however, there remains an energetic oxygen-burning region that trails the carbon burning by an amount that is sensitive to the turbulence intensity. As the carbon flame makes a transition to the distributed regime (Karlovitz number {approx}> 10), the characteristic separation between the carbon- and oxygen-burning regions increases dramatically, from a fraction of a meter to many kilometers. The oxygen-rich mixture between the two flames is created at a nearly constant temperature, and turbulence helps to maintain islands of well-mixed isothermal fuel as the temperature increases. The delayed burning of these regions can be supersonic and could initiate a detonation.

Woosley, S. E. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Kerstein, A. R. [Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551 (United States); Aspden, A. J., E-mail: woosley@ucolick.org, E-mail: arkerst@sandia.gov, E-mail: ajaspden@lbl.gov [Center for Computational Sciences and Engineering, Lawrence Berkeley National Laboratory, CA 94720 (United States)

2011-06-10T23:59:59.000Z

106

TYPE Ia SUPERNOVAE: CALCULATIONS OF TURBULENT FLAMES USING THE LINEAR EDDY MODEL  

SciTech Connect

The nature of carbon burning flames in Type Ia supernovae is explored as they interact with Kolmogorov turbulence. One-dimensional calculations using the Linear Eddy Model of Kerstein elucidate three regimes of turbulent burning. In the simplest case, large-scale turbulence folds and deforms thin laminar flamelets to produce a flame brush with a total burning rate given approximately by the speed of turbulent fluctuations on the integral scale, U{sub L} , This is the regime where the supernova explosion begins and where most of its pre-detonation burning occurs. As the density declines, turbulence starts to tear the individual flamelets, making broader structures that move faster. For a brief time, these turbulent flamelets are still narrow compared to their spacing and the concept of a flame brush moving with an overall speed of U{sub L} remains valid. However, the typical width of the individual flamelets, which is given by the condition that their turnover time equals their burning time, continues to increase as the density declines. Eventually, mixed regions almost as large as the integral scale itself are transiently formed. At that point, a transition to detonation can occur. The conditions for such a transition are explored numerically and it is estimated that the transition will occur for densities near 1 x 10{sup 7} g cm{sup -3}, provided the turbulent speed on the integral scale exceeds about 20% sonic. An example calculation shows the details of a detonation actually developing.

Woosley, S. E. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Kerstein, A. R.; Sankaran, V. [Combustion Research Facility, Sandia National Laboratory, Livermore, CA 94551 (United States); Aspden, A. J. [Center for Computational Science and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Roepke, F. K., E-mail: woosley@ucolick.or, E-mail: arkerst@sandia.go, E-mail: AJAspden@lbl.go, E-mail: fritz@mpa-Garching.mpg.d [Max Planck Institut fuer Astrophysik, Garching (Germany)

2009-10-10T23:59:59.000Z

107

ON THE NATURE OF THE PROGENITOR OF THE Type Ia SN2011fe IN M101  

SciTech Connect

The explosion of a Type Ia supernova, SN2011fe, in the nearby Pinwheel galaxy (M101 at 6.4 Mpc) provides an opportunity to study pre-explosion images and search for the progenitor, which should consist of a white dwarf (WD), possibly surrounded by an accretion disk, in orbit with another star. We report on our use of deep Chandra observations and Hubble Space Telescope observations to limit the luminosity and temperature of the pre-explosion WD. It is found that if the spectrum was a blackbody, then pre-SN WDs with steady nuclear burning of the highest possible temperatures and luminosities are excluded assuming moderate n{sub H} values, but values of kT between roughly 10 eV and 60 eV are permitted even if the WD was emitting at the Eddington luminosity. This allows the progenitor to be an accreting nuclear-burning WD with an expanded photosphere 4-100 times the WD itself, or a super-critically accreting WD blowing off an optically thick strong wind, or possibly a recurrent nova with luminosities an order of magnitude lower than Eddington. The observations are also consistent with a double degenerate scenario, or a spinning down WD that has been spun up by accretion from the donor.

Liu Jifeng [National Astronomical Observatory of China, Beijing 100012 (China); Di Stefano, Rosanne; Wang Tao; Moe, Maxwell [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2012-04-20T23:59:59.000Z

108

Capturing the Fire: Flame Energetics and Neutronizaton for Type Ia Supernova Simulations  

E-Print Network (OSTI)

We develop and calibrate a realistic model flame for hydrodynamical simulations of deflagrations in white dwarf (Type Ia) supernovae. Our flame model builds on the advection-diffusion-reaction model of Khokhlov and includes electron screening and Coulomb corrections to the equation of state in a self-consistent way. We calibrate this model flame--its energetics and timescales for energy release and neutronization--with self-heating reaction network calculations that include both these Coulomb effects and up-to-date weak interactions. The burned material evolves post-flame due to both weak interactions and hydrodynamic changes in density and temperature. We develop a scheme to follow the evolution, including neutronization, of the NSE state subsequent to the passage of the flame front. As a result, our model flame is suitable for deflagration simulations over a wide range of initial central densities and can track the temperature and electron fraction of the burned material through the explosion and into the expansion of the ejecta.

A. C. Calder; D. M. Townsley; I. R. Seitenzahl; F. Peng; O. E. B. Messer; N. Vladimirova; E. F. Brown; J. W. Truran; D. Q. Lamb

2006-11-01T23:59:59.000Z

109

The Joint Efficient Dark-energy Investigation (JEDI): Measuring the cosmic expansion history from type Ia supernovae  

E-Print Network (OSTI)

JEDI (Joint Efficient Dark-energy Investigation) is a candidate implementation of the NASA-DOE Joint Dark Energy Mission (JDEM). JEDI will probe dark energy in three independent methods: (1) type Ia supernovae, (2) baryon acoustic oscillations, and (3) weak gravitational lensing. In an accompanying paper, an overall summary of the JEDI mission is given. In this paper, we present further details of the supernova component of JEDI. To derive model-independent constraints on dark energy, it is important to precisely measure the cosmic expansion history, H(z), in continuous redshift bins from z \\~ 0-2 (the redshift range in which dark energy is important). SNe Ia at z > 1 are not readily accessible from the ground because the bulk of their light has shifted into the near-infrared where the sky background is overwhelming; hence a space mission is required to probe dark energy using SNe. Because of its unique near-infrared wavelength coverage (0.8-4.2 microns), JEDI has the advantage of observing SNe Ia in the rest frame J band for the entire redshift range of 0 energy are discussed, with special emphasis on the improved precision afforded by the rest frame near-infrared data.

M. M. Phillips; Peter Garnavich; Yun Wang; David Branch; Edward Baron; Arlin Crotts; J. Craig Wheeler; Edward Cheng; Mario Hamuy; for the JEDI Team

2006-06-28T23:59:59.000Z

110

A Measurement of the Rate of Type Ia Supernovae in Galaxy Clusters from the SDSS-II Supernova Survey  

E-Print Network (OSTI)

ABRIDGED We present measurements of the Type Ia supernova (SN) rate in galaxy clusters based on data from the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. The cluster SN Ia rate is determined from 9 SN events in a set of 71 C4 clusters at z <0.17 and 27 SN events in 492 maxBCG clusters at 0.1 < z < 0.3$. We find values for the cluster SN Ia rate of $({0.37}^{+0.17+0.01}_{-0.12-0.01}) \\mathrm{SNu}r h^{2}$ and $({0.55}^{+0.13+0.02}_{-0.11-0.01}) \\mathrm{SNu}r h^{2}$ ($\\mathrm{SNu}x = 10^{-12} L_{x\\sun}^{-1} \\mathrm{yr}^{-1}$) in C4 and maxBCG clusters, respectively, where the quoted errors are statistical and systematic, respectively. The SN rate for early-type galaxies is found to be $({0.31}^{+0.18+0.01}_{-0.12-0.01}) \\mathrm{SNu}r h^{2}$ and $({0.49}^{+0.15+0.02}_{-0.11-0.01})$ $\\mathrm{SNu}r h^{2}$ in C4 and maxBCG clusters, respectively. The SN rate for the brightest cluster galaxies (BCG) is found to be $({2.04}^{+1.99+0.07}_{-1.11-0.04}) \\mathrm{SNu}r h^{2}$ and $({0.36}^{+0.84+0.01}_...

Dilday, Benjamin; Becker, Andrew; Bender, Ralf; Castander, Francisco; Cinabro, David; Frieman, Joshua A; Galbany, Llus; Garnavich, Peter; Goobar, Ariel; Hopp, Ulrich; Ihara, Yutaka; Jha, Saurabh W; Kessler, Richard; Lampeitl, Hubert; Marriner, John; Miquel, Ramon; Moll, Mercedes; Nichol, Robert C; Nordin, Jakob; Riess, Adam G; Sako, Masao; Schneider, Donald P; Smith, Mathew; Sollerman, Jesper; Wheeler, J Craig; stman, Linda; Bizyaev, Dmitry; Brewington, Howard; Malanushenko, Elena; Malanushenko, Viktor; Oravetz, Dan; Pan, Kaike; Simmons, Audrey; Snedden, Stephanie

2010-01-01T23:59:59.000Z

111

The Rise and Fall of Type Ia Supernova Light Curves in the SDSS-II Supernova Survey  

Science Conference Proceedings (OSTI)

We analyze the rise and fall times of Type Ia supernova (SN Ia) light curves discovered by the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. From a set of 391 light curves k-corrected to the rest-frame B and V bands, we find a smaller dispersion in the rising portion of the light curve compared to the decline. This is in qualitative agreement with computer models which predict that variations in radioactive nickel yield have less impact on the rise than on the spread of the decline rates. The differences we find in the rise and fall properties suggest that a single 'stretch' correction to the light curve phase does not properly model the range of SN Ia light curve shapes. We select a subset of 105 light curves well observed in both rise and fall portions of the light curves and develop a '2-stretch' fit algorithm which estimates the rise and fall times independently. We find the average time from explosion to B-band peak brightness is 17.38 {+-} 0.17 days, but with a spread of rise times which range from 13 days to 23 days. Our average rise time is shorter than the 19.5 days found in previous studies; this reflects both the different light curve template used and the application of the 2-stretch algorithm. The SDSS-II supernova set and the local SNe Ia with well-observed early light curves show no significant differences in their average rise-time properties. We find that slow-declining events tend to have fast rise times, but that the distribution of rise minus fall time is broad and single peaked. This distribution is in contrast to the bimodality in this parameter that was first suggested by Strovink (2007) from an analysis of a small set of local SNe Ia. We divide the SDSS-II sample in half based on the rise minus fall value, t{sub r} - t{sub f} {approx} 2 days, to search for differences in their host galaxy properties and Hubble residuals; we find no difference in host galaxy properties or Hubble residuals in our sample.

Hayden, Brian T.; /Notre Dame U.; Garnavich, Peter M.; /Notre Dame U.; Kessler, Richard; /KICP, Chicago /Chicago U., EFI; Frieman, Joshua A.; /KICP, Chicago /Chicago U. /Fermilab; Jha, Saurabh W.; /Stanford U., Phys. Dept. /Rutgers U., Piscataway; Bassett, Bruce; /Cape Town U., Dept. Math. /South African Astron. Observ.; Cinabro, David; /Wayne State U.; Dilday, Benjamin; /Rutgers U., Piscataway; Kasen, Daniel; /UC, Santa Cruz; Marriner, John; /Fermilab; Nichol, Robert C.; /Portsmouth U., ICG /Baltimore, Space Telescope Sci. /Johns Hopkins U.

2010-01-01T23:59:59.000Z

112

THE DETONATION MECHANISM OF THE PULSATIONALLY ASSISTED GRAVITATIONALLY CONFINED DETONATION MODEL OF Type Ia SUPERNOVAE  

Science Conference Proceedings (OSTI)

We describe the detonation mechanism composing the 'pulsationally assisted' gravitationally confined detonation (GCD) model of Type Ia supernovae. This model is analogous to the previous GCD model reported in Jordan et al.; however, the chosen initial conditions produce a substantively different detonation mechanism, resulting from a larger energy release during the deflagration phase. The resulting final kinetic energy and {sup 56}Ni yields conform better to observational values than is the case for the 'classical' GCD models. In the present class of models, the ignition of a deflagration phase leads to a rising, burning plume of ash. The ash breaks out of the surface of the white dwarf, flows laterally around the star, and converges on the collision region at the antipodal point from where it broke out. The amount of energy released during the deflagration phase is enough to cause the star to rapidly expand, so that when the ash reaches the antipodal point, the surface density is too low to initiate a detonation. Instead, as the ash flows into the collision region (while mixing with surface fuel), the star reaches its maximally expanded state and then contracts. The stellar contraction acts to increase the density of the star, including the density in the collision region. This both raises the temperature and density of the fuel-ash mixture in the collision region and ultimately leads to thermodynamic conditions that are necessary for the Zel'dovich gradient mechanism to produce a detonation. We demonstrate feasibility of this scenario with three three-dimensional (3D), full star simulations of this model using the FLASH code. We characterized the simulations by the energy released during the deflagration phase, which ranged from 38% to 78% of the white dwarf's binding energy. We show that the necessary conditions for detonation are achieved in all three of the models.

Jordan, G. C. IV; Graziani, C.; Weide, K.; Norris, J.; Hudson, R.; Lamb, D. Q. [Flash Center for Computational Science, University of Chicago, Chicago, IL 60637 (United States); Fisher, R. T. [Department of Physics, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02740 (United States); Townsley, D. M. [Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487 (United States); Meakin, C. [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); Reid, L. B. [NTEC Environmental Technology, Subiaco WA 6008 (Australia)

2012-11-01T23:59:59.000Z

113

Three-dimensional numerical simulations of Rayleigh-Taylorunstable flames in type Ia supernovae  

SciTech Connect

Flame instabilities play a dominant role in accelerating the burning front to a large fraction of the speed of sound in a Type Ia supernova. We present a three-dimensional numerical simulation of a Rayleigh-Taylor unstable carbon flame, following its evolution through the transition to turbulence. A low Mach number hydrodynamics method is used, freeing us from the harsh time step restrictions imposed by sound waves. We fully resolve the thermal structure of the flame and its reaction zone, eliminating the need for a flame model. A single density is considered, 1.5x107 gm/cc, and half carbon/half oxygen fuel--conditions under which the flame propagated in the flamelet regime in our related two-dimensional study. We compare to a corresponding two-dimensional simulation, and show that while fire-polishing keeps the small features suppressed in two dimensions, turbulence wrinkles the flame on far smaller scales in the three-dimensional case, suggesting that the transition to the distributed burning regime occurs at higher densities in three dimensions. Detailed turbulence diagnostics are provided. We show that the turbulence follows a Kolmogorov spectrum and is highly anisotropic on the large scales, with a much larger integral scale in the direction of gravity. Furthermore, we demonstrate that it becomes more isotropic as it cascades down to small scales. Based on the turbulent statistics and the flame properties of our simulation, we compute the Gibson scale. We show the progress of the turbulent flame through a classic combustion regime diagram, indicating that the flame just enters the distributed burning regime near the end of our simulation.

Zingale, M.; Woosley, S.E.; Rendleman, C.A.; Day, M.S.; Bell, J.B.

2005-01-28T23:59:59.000Z

114

Constraining deflagration models of Type Ia supernovae through intermediate-mass elements  

E-Print Network (OSTI)

The physical structure of a nuclear flame is a basic ingredient of the theory of Type Ia supernovae (SNIa). Assuming an exponential density reduction with several characteristic times we have followed the evolution of a planar nuclear flame in an expanding background from an initial density 6.6 10^7 g/cm3 down to 2 10^6 g/cm3. The total amount of synthesized intermediate-mass elements (IME), from silicon to calcium, was monitored during the calculation. We have made use of the computed mass fractions, X_IME, of these elements to give an estimation of the total amount of IME synthesized during the deflagration of a massive white dwarf. Using X_IME and adopting the usual hypothesis that turbulence decouples the effective burning velocity from the laminar flame speed, so that the relevant flame speed is actually the turbulent speed on the integral length-scale, we have built a simple geometrical approach to model the region where IME are thought to be produced. It turns out that a healthy production of IME involves the combination of not too short expansion times, t_c > 0.2 s, and high turbulent intensities. According to our results it could be difficult to produce much more than 0.2 solar masses of intermediate-mass elements within the deflagrative paradigma. The calculations also suggest that the mass of IME scales with the mass of Fe-peak elements, making it difficult to conciliate energetic explosions with low ejected nickel masses, as in the well observed SN1991bg or in SN1998de. Thus a large production of Si-peak elements, especially in combination with a low or a moderate production of iron, could be better addressed by either the delayed detonation route in standard Chandrasekhar-mass models or, perhaps, by the off-center helium detonation in the sub Chandrasekhar-mass scenario.

D. Garcia-Senz; E. Bravo; R. M. Cabezon; S. E. Woosley

2006-09-15T23:59:59.000Z

115

Revealing Type Ia supernova physics with cosmic rates and nuclear gamma rays  

E-Print Network (OSTI)

Type Ia supernovae (SNIa) remain mysterious despite their central importance in cosmology and their rapidly increasing discovery rate. The progenitors of SNIa can be probed by the delay time between progenitor birth and explosion as SNIa. The explosions and progenitors of SNIa can be probed by MeV nuclear gamma rays emitted in the decays of radioactive nickel and cobalt into iron. We compare the cosmic star formation and SNIa rates, finding that their different redshift evolution requires a large fraction of SNIa to have large delay times. A delay time distribution of the form t^{-1.0 +/- 0.3} provides a good fit, implying 50% of SNIa explode more than ~ 1 Gyr after progenitor birth. The extrapolation of the cosmic SNIa rate to z = 0 agrees with the rate we deduce from catalogs of local SNIa. We investigate prospects for gamma-ray telescopes to exploit the facts that escaping gamma rays directly reveal the power source of SNIa and uniquely provide tomography of the expanding ejecta. We find large improvements relative to earlier studies by Gehrels et al. in 1987 and Timmes & Woosley in 1997 due to larger and more certain SNIa rates and advances in gamma-ray detectors. The proposed Advanced Compton Telescope, with a narrow-line sensitivity ~ 60 times better than that of current satellites, would, on an annual basis, detect up to ~ 100 SNIa (3 sigma) and provide revolutionary model discrimination for SNIa within 20 Mpc, with gamma-ray light curves measured with ~ 10 sigma significance daily for ~ 100 days. Even more modest improvements in detector sensitivity would open a new and invaluable astronomy with frequent SNIa gamma-ray detections.

Shunsaku Horiuchi; John F. Beacom

2010-06-30T23:59:59.000Z

116

Limits on the Time Variation of the Fermi Constant G_F Based on Type Ia Supernova Observations  

E-Print Network (OSTI)

The light curve of a type Ia supernova decays at a rate set by the beta-decay lifetimes of the Ni-56 and Co-56 produced in the explosion. This makes such a light curve sensitive to the value of the Fermi constant G_F at the time of the supernova. Using data from the CfA Supernova Archive, we measure the dependence of the light curve decay rate on redshift and place a bound on the time variation of G_F of |(dG_F/dt)/G_F| < 10^(-9) / y.

Ferrero, Alejandro

2010-01-01T23:59:59.000Z

117

Type Ia Supernova Properties as a Function of the Distance to the Host Galaxy in the SDSS-II SN Survey  

E-Print Network (OSTI)

We use type-Ia supernovae (SNe Ia) discovered by the SDSS-II SN Survey to search for dependencies between SN Ia properties and the projected distance to the host galaxy center, using the distance as a proxy for local galaxy properties (local star-formation rate, local metallicity, etc.). The sample consists of almost 200 spectroscopically or photometrically confirmed SNe Ia at redshifts below 0.25. The sample is split into two groups depending on the morphology of the host galaxy. We fit light-curves using both MLCS2k2 and SALT2, and determine color (AV, c) and light-curve shape (delta, x1) parameters for each SN Ia, as well as its residual in the Hubble diagram. We then correlate these parameters with both the physical and the normalized distances to the center of the host galaxy and look for trends in the mean values and scatters of these parameters with increasing distance. The most significant (at the 4-sigma level) finding is that the average fitted AV from MLCS2k2 and c from SALT2 decrease with the proj...

Galbany, Lluis; Ostman, Linda; Brown, Peter J; Cinabro, David; D'Andrea, Chris B; Frieman, Joshua; Jha, Saurabh W; Marriner, John; Nichol, Robert C; Nordin, Jakob; Olmstead, Matthew D; Sako, Masao; Schneider, Donald P; Smith, Mathew; Sollerman, Jesper; Pan, Kaike; Snedden, Stephanie; Bizyaev, Dmitry; Brewington, Howard; Malanushenko, Elena; Malanushenko, Viktor; Oravetz, Dan; Simmons, Audrey; Shelden, Alaina

2012-01-01T23:59:59.000Z

118

FAILED-DETONATION SUPERNOVAE: SUBLUMINOUS LOW-VELOCITY Ia SUPERNOVAE AND THEIR KICKED REMNANT WHITE DWARFS WITH IRON-RICH CORES  

SciTech Connect

Type Ia supernovae (SNe Ia) originate from the thermonuclear explosions of carbon-oxygen (C-O) white dwarfs (WDs). The single-degenerate scenario is a well-explored model of SNe Ia where unstable thermonuclear burning initiates in an accreting, Chandrasekhar-mass WD and forms an advancing flame. By several proposed physical processes, the rising, burning material triggers a detonation, which subsequently consumes and unbinds the WD. However, if a detonation is not triggered and the deflagration is too weak to unbind the star, a completely different scenario unfolds. We explore the failure of the gravitationally confined detonation mechanism of SNe Ia, and demonstrate through two-dimensional and three-dimensional simulations the properties of failed-detonation SNe. We show that failed-detonation SNe expel a few 0.1 M{sub Sun} of burned and partially burned material and that a fraction of the material falls back onto the WD, polluting the remnant WD with intermediate-mass and iron-group elements that likely segregate to the core forming a WD whose core is iron rich. The remaining material is asymmetrically ejected at velocities comparable to the escape velocity from the WD, and in response, the WD is kicked to velocities of a few hundred km s{sup -1}. These kicks may unbind the binary and eject a runaway/hypervelocity WD. Although the energy and ejected mass of the failed-detonation SN are a fraction of typical thermonuclear SNe, they are likely to appear as subluminous low-velocity SNe Ia. Such failed detonations might therefore explain or are related to the observed branch of peculiar SNe Ia, such as the family of low-velocity subluminous SNe (SN 2002cx/SN 2008ha-like SNe).

Jordan, George C. IV; Van Rossum, Daniel R. [Center for Astrophysical Thermonuclear Flashes, University of Chicago, Chicago, IL 60637 (United States); Perets, Hagai B. [Physics Department, Technion, Israel Institute of Technology, Haifa 32000 (Israel); Fisher, Robert T. [Department of Physics, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02740 (United States)

2012-12-20T23:59:59.000Z

119

TYPE Ia SUPERNOVA PROPERTIES AS A FUNCTION OF THE DISTANCE TO THE HOST GALAXY IN THE SDSS-II SN SURVEY  

Science Conference Proceedings (OSTI)

We use Type Ia supernovae (SNe Ia) discovered by the Sloan Digital Sky Survey-II SN Survey to search for dependencies between SN Ia properties and the projected distance to the host-galaxy center, using the distance as a proxy for local galaxy properties (local star formation rate, local metallicity, etc.). The sample consists of almost 200 spectroscopically or photometrically confirmed SNe Ia at redshifts below 0.25. The sample is split into two groups depending on the morphology of the host galaxy. We fit light curves using both MLCS2K2 and SALT2, and determine color (A{sub V} , c) and light-curve shape ({Delta}, x{sub 1}) parameters for each SN Ia, as well as its residual in the Hubble diagram. We then correlate these parameters with both the physical and the normalized distances to the center of the host galaxy and look for trends in the mean values and scatters of these parameters with increasing distance. The most significant (at the 4{sigma} level) finding is that the average fitted A{sub V} from MLCS2K2 and c from SALT2 decrease with the projected distance for SNe Ia in spiral galaxies. We also find indications that supernovae (SNe) in elliptical galaxies tend to have narrower light curves if they explode at larger distances, although this may be due to selection effects in our sample. We do not find strong correlations between the residuals of the distance moduli with respect to the Hubble flow and the galactocentric distances, which indicates a limited correlation between SN magnitudes after standardization and local host metallicity.

Galbany, Lluis; Miquel, Ramon; Oestman, Linda [Institut de Fisica d'Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona) (Spain); Brown, Peter J.; Olmstead, Matthew D. [Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112 (United States); Cinabro, David [Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201 (United States); D'Andrea, Chris B.; Nichol, Robert C. [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX (United Kingdom); Frieman, Joshua [Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellise Avenue, Chicago, IL 60637 (United States); Jha, Saurabh W. [Department of Physics and Astronomy, Rutgers the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States); Marriner, John [Center for Astrophysics, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Nordin, Jakob [E.O. Lawrence Berkeley National Lab, 1 Cyclotron Rd., Berkeley, CA 94720 (United States); Sako, Masao [Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Schneider, Donald P. [Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States); Smith, Mathew [Department of Physics, University of Western Cape, Bellville 7535, Cape Town (South Africa); Sollerman, Jesper [Oskar Klein Centre, Department of Astronomy, AlbaNova, SE-106 91 Stockholm (Sweden); Pan, Kaike; Snedden, Stephanie; Bizyaev, Dmitry; Brewington, Howard, E-mail: lluis.galbany@ist.utl.pt [Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349 (United States); and others

2012-08-20T23:59:59.000Z

120

A Measurement of the Rate of type-Ia Supernovae at Redshift $z\\approx$ 0.1 from the First Season of the SDSS-II Supernova Survey  

E-Print Network (OSTI)

We present a measurement of the rate of type Ia supernovae (SNe Ia) from the first of three seasons of data from the SDSS-II Supernova Survey. For this measurement, we include 17 SNe Ia at redshift $z\\le0.12$. Assuming a flat cosmology with $\\Omega_m = 0.3=1-\\Omega_\\Lambda$, we find a volumetric SN Ia rate of $[2.93^{+0.17}_{-0.04}({\\rm systematic})^{+0.90}_{-0.71}({\\rm statistical})] \\times 10^{-5} {\\rm SNe} {\\rm Mpc}^{-3} h_{70}^3 {\\rm year}^{-1}$, at a volume-weighted mean redshift of 0.09. This result is consistent with previous measurements of the SN Ia rate in a similar redshift range. The systematic errors are well controlled, resulting in the most precise measurement of the SN Ia rate in this redshift range. We use a maximum likelihood method to fit SN rate models to the SDSS-II Supernova Survey data in combination with other rate measurements, thereby constraining models for the redshift-evolution of the SN Ia rate. Fitting the combined data to a simple power-law evolution of the volumetric SN Ia rat...

Dilday, Benjamin; Frieman, J A; Holtzman, J; Marriner, J; Miknaitis, G; Nichol, R C; Romani, R; Sako, M; Bassett, B; Becker, A; Cinabro, D; De Jongh, F; Depoy, D L; Doi, M; Garnavich, P M; Hogan, C J; Jha, S; Konishi, K; Lampeitl, H; Marshall, J L; McGinnis, D; Prieto, J L; Riess, A G; Richmond, M W; Schneider, D P; Smith, M; Takanashi, N; Tokita, K; van der Heyden, K; Zheng, N Yasuda C; Barentine, J; Brewington, H; Choi, C; Crotts, A; Dembicky, J; Harvanek, M; Im, M; Ketzeback, W; Kleinman, S J; Krzesi?ski, J; Long, D C; Malanushenko, E; Malanushenko, V; McMillan, R J; Nitta, A; Pan, K; Saurage, G; Snedden, S A; Watters, S; Wheeler, J C; York, D

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Making the Standard Candle: A study of how the progenitor white dwarf modulates the peak luminosity of type Ia supernovae  

SciTech Connect

The goals of the proposed research as stated in the proposal were to: Build a suite of one-dimensional initial models of different metallicities and central densities. Using the improved flame capturing scheme, simulate the explosion of a white dwarf with embedded Lagrangian tracer particles, and post-process the thermal histories of the tracers to reconstruct the nucleosynthesis of the explosion. Survey the effects of a changing progenitor metallicity on the isotopic yields. Of particular interest is 1) whether the linear relation between the mass of 56Ni synthesized and the pro- genitor metallicity is moderated by the effect of electron captures in the core; and 2) how a varying central density alters the relation between metallicity and 56Ni mass. Using these results, examine how the observed metallicity distribution would affect the brightness distribution of SNe Ia and the isotopic ratios about the Fe-peak.

Brown, Edward F [Michigan State University

2010-01-21T23:59:59.000Z

122

Determining the motion of the solar system relative to the cosmic microwave background using type Ia supernovae  

E-Print Network (OSTI)

We estimate the solar system motion relative to the cosmic microwave background using type Ia supernovae (SNe) measurements. We take into account the correlations in the error bars of the SNe measurements arising from correlated peculiar velocities. Without accounting for correlations in the peculiar velocities, the SNe data we use appear to detect the peculiar velocity of the solar system at about the 3.5 sigma level. However, when the correlations are correctly accounted for, the SNe data only detects the solar system peculiar velocity at about the 2.5 sigma level. We forecast that the solar system peculiar velocity will be detected at the 9 sigma level by GAIA and the 11 sigma level by the LSST. For these surveys we find the correlations are much less important as most of the signal comes from higher redshifts where the number density of SNe is insufficient for the correlations to be important.

Christopher Gordon; Kate Land; Anze Slosar

2007-11-27T23:59:59.000Z

123

A localised subgrid scale model for fluid dynamical simulations in astrophysics II: Application to type Ia supernovae  

E-Print Network (OSTI)

The dynamics of the explosive burning process is highly sensitive to the flame speed model in numerical simulations of type Ia supernovae. Based upon the hypothesis that the effective flame speed is determined by the unresolved turbulent velocity fluctuations, we employ a new subgrid scale model which includes a localised treatment of the energy transfer through the turbulence cascade in combination with semi-statistical closures for the dissipation and non-local transport of turbulence energy. In addition, subgrid scale buoyancy effects are included. In the limit of negligible energy transfer and transport, the dynamical model reduces to the Sharp-Wheeler relation. According to our findings, the Sharp-Wheeler relation is insuffcient to account for the complicated turbulent dynamics of flames in thermonuclear supernovae. The application of a co-moving grid technique enables us to achieve very high spatial resolution in the burning region. Turbulence is produced mostly at the flame surface and in the interior ash regions. Consequently, there is a pronounced anisotropy in the vicinity of the flame fronts. The localised subgrid scale model predicts significantly enhanced energy generation and less unburnt carbon and oxygen at low velocities compared to earlier simulations.

W. Schmidt; J. C. Niemeyer; W. Hillebrandt; F. K. Roepke

2006-01-23T23:59:59.000Z

124

Early and late time VLT spectroscopy of SN 2001el - progenitor constraints for a type Ia supernova  

E-Print Network (OSTI)

We present early time high-resolution (VLT/UVES) and late time low-resolution (VLT/FORS) optical spectra of the normal type Ia supernova, SN 2001el. The high-resolution spectra were obtained 9 and 2 days before (B-band) maximum light in order to detect narrow hydrogen and/or helium emission lines from the SN CSM. No such lines were detected in our data. We therefore use photoionisation models to derive upper limits of 1x10^-5 and 6x10^-5 Msol/yr, assuming wind velocities of 10 and 50 km/s, respectively, for the mass loss rate from the progenitor system of SN 2001el. This excludes a symbiotic star in the upper mass loss rate regime from being the progenitor of SN 2001el. The low-resolution spectrum was obtained in the nebular phase of the supernova, \\~400 days after the maximum light, to search for any hydrogen rich gas originating from the SN progenitor system. However, we see no signs of Balmer lines in our spectrum. Therefore, we model the late time spectra to derive an upper limit of ~0.03 Msol for solar a...

Mattila, S; Sollerman, J; Kozma, C; Baron, E; Fransson, C; Leibundgut, B; Nomoto, K

2005-01-01T23:59:59.000Z

125

EVOLUTION OF POST-IMPACT COMPANION STARS IN SN Ia REMNANTS WITHIN THE SINGLE-DEGENERATE SCENARIO  

Science Conference Proceedings (OSTI)

The nature of the progenitor systems of Type Ia supernovae is still uncertain. One way to distinguish between the single-degenerate scenario and double-degenerate scenario is to search for the post-impact remnant star. To examine the characteristics of the post-impact remnant star, we have carried out three-dimensional hydrodynamic simulations of supernova impacts on main-sequence-like stars. We explore the evolution of the post-impact remnants using the stellar evolution code MESA. We find that the luminosity and radius of the remnant star dramatically increase just after the impact. After the explosion, post-impact companions continue to expand on a progenitor-dependent timescale of {approx}10{sup 2.5}-10{sup 3} years before contracting. It is found that the time evolution of the remnant star is dependent not only on the amount of energy absorbed but also on the depth of the energy deposition. We examine the viability of the candidate star Tycho G as the possible remnant companion in Tycho's supernova by comparing it to the evolved post-impact remnant stars in our simulations. The closest model in our simulations has a similar effective temperature, but the luminosity and radius are twice as large. By examining the angular momentum distribution in our simulations, we find that the surface rotational speed could drop to {approx}10 km s{sup -1} if the specific angular momentum is conserved during the post-impact evolution, implying that Tycho G cannot be completely ruled out because of its low surface rotation speed.

Pan, Kuo-Chuan; Ricker, Paul M. [Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, IL 61801 (United States); Taam, Ronald E., E-mail: kpan2@illinois.edu, E-mail: pmricker@illinois.edu, E-mail: taam@northwestern.edu [Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (United States)

2012-11-20T23:59:59.000Z

126

Gorchakova-IA  

NLE Websites -- All DOE Office Websites (Extended Search)

(3D) Radiation Codes (Cahalan 2000). In the present work, the broadband fluxes of solar radiation are calculated using two different approaches. The purpose is * to compare...

127

Neutron Diffraction Residual Strain Tensor Measurements Within The Phase IA Weld Mock-up Plate P-5  

SciTech Connect

Oak Ridge National Laboratory (ORNL) has worked with NRC and EPRI to apply neutron and X-ray diffraction methods to characterize the residual stresses in a number of dissimilar metal weld mockups and samples. The design of the Phase IA specimens aimed to enable stress measurements by several methods and computational modeling of the weld residual stresses. The partial groove in the 304L stainless steel plate was filled with weld beads of Alloy 82. A summary of the weld conditions for each plate is provided in Table 1. The plates were constrained along the long edges during and after welding by bolts with spring-loaded washers attached to the 1-inch thick Al backing plate. The purpose was to avoid stress relief due to bending of the welded stainless steel plate. The neutron diffraction method was one of the methods selected by EPRI for non-destructive through thickness strain and stress measurement. Four different plates (P-3 to P-6) were studied by neutron diffraction strain mapping, representing four different welding conditions. Through thickness neutron diffraction strain mappings at NRSF2 for the four plates and associated strain-free d-zero specimens involved measurement along seven lines across the weld and at six to seven depths. The mountings of each plate for neutron diffraction measurements were such that the diffraction vector was parallel to each of the three primary orthogonal directions of the plate: two in-plane directions, longitudinal and transverse, and the direction normal to the plate (shown in left figure within Table 1). From the three orthogonal strains for each location, the residual stresses along the three plate directions were calculated. The principal axes of the strain and stress tensors, however, need not necessarily align with the plate coordinate system. To explore this, plate P-5 was selected for examination of the possibility that the principal axes of strain are not along the sample coordinate system axes. If adequate data could be collected the goal would be to determine the strain tensor's orientation and magnitude of strain along each principle axis direction.

Hubbard, Camden R [ORNL

2011-09-01T23:59:59.000Z

128

Early and late time VLT spectroscopy of SN 2001el - progenitor constraints for a type Ia supernova  

E-Print Network (OSTI)

We present early time high-resolution (VLT/UVES) and late time low-resolution (VLT/FORS) optical spectra of the normal type Ia supernova, SN 2001el. The high-resolution spectra were obtained at -9 and -2 days to allow the detection of narrow hydrogen and/or helium emission lines from the circumstellar medium of the SN. No such lines were detected, and we therefore use photoionisation models to derive upper limits of 9x10^-6 Msun/yr and 5x10^-5 Msun/yr for the mass loss rate from the progenitor system assuming velocities of 10 km/s and 50 km/s, respectively, for a wind extending to outside at least a few x 10^15 cm away from the SN explosion site. These limits exclude a symbiotic star in the upper mass loss rate regime from being the progenitor of SN 2001el. The low resolution spectrum was obtained in the nebular phase of the SN, 400 days after the maximum light, to search for any hydrogen rich gas originating from the SN progenitor system. However, we see no signs of Balmer lines in our spectrum. Therefore, we model the late time spectra to derive an upper limit of ~0.03 Msun for solar abundance material present at velocities lower than 1000 km/s within the SN explosion site. According to simulations of Marietta et al. (2000) this is less than the expected mass lost by a subgiant, red giant or main sequence secondary star at a small binary separation as a result of the SN explosion. Finally, we discuss the origin of high velocity Ca II lines. We see both the CaII IR triplet and the H&K lines in the -9 days spectrum at a very high velocity of up to 34000 km/s. The spectrum also shows a flat-bottomed Si II `6150 A' feature similar to the one previously observed in SN 1990N at -14 days. We compare these spectral features to those observed in SNe 1984A and 1990N at even higher velocities.

S. Mattila; P. Lundqvist; J. Sollerman; C. Kozma; E. Baron; C. Fransson; B. Leibundgut; K. Nomoto

2005-01-20T23:59:59.000Z

129

A Measurement of the Rate of type-Ia Supernovae at Redshift $z\\approx$ 0.1 from the First Season of the SDSS-II Supernova Survey  

E-Print Network (OSTI)

We present a measurement of the rate of type Ia supernovae (SNe Ia) from the first of three seasons of data from the SDSS-II Supernova Survey. For this measurement, we include 17 SNe Ia at redshift $z\\le0.12$. Assuming a flat cosmology with $\\Omega_m = 0.3=1-\\Omega_\\Lambda$, we find a volumetric SN Ia rate of $[2.93^{+0.17}_{-0.04}({\\rm systematic})^{+0.90}_{-0.71}({\\rm statistical})] \\times 10^{-5} {\\rm SNe} {\\rm Mpc}^{-3} h_{70}^3 {\\rm year}^{-1}$, at a volume-weighted mean redshift of 0.09. This result is consistent with previous measurements of the SN Ia rate in a similar redshift range. The systematic errors are well controlled, resulting in the most precise measurement of the SN Ia rate in this redshift range. We use a maximum likelihood method to fit SN rate models to the SDSS-II Supernova Survey data in combination with other rate measurements, thereby constraining models for the redshift-evolution of the SN Ia rate. Fitting the combined data to a simple power-law evolution of the volumetric SN Ia rate, $r_V \\propto (1+z)^{\\beta}$, we obtain a value of $\\beta = 1.5 \\pm 0.6$, i.e. the SN Ia rate is determined to be an increasing function of redshift at the $\\sim 2.5 \\sigma$ level. Fitting the results to a model in which the volumetric SN rate, $r_V=A\\rho(t)+B\\dot \\rho(t)$, where $\\rho(t)$ is the stellar mass density and $\\dot \\rho(t)$ is the star formation rate, we find $A = (2.8 \\pm 1.2) \\times 10^{-14} \\mathrm{SNe} \\mathrm{M}_{\\sun}^{-1} \\mathrm{year}^{-1}$, $B = (9.3^{+3.4}_{-3.1})\\times 10^{-4} \\mathrm{SNe} \\mathrm{M}_{\\sun}^{-1}$.

Benjamin Dilday; R. Kessler; J. A. Frieman; J. Holtzman; J. Marriner; G. Miknaitis; R. C. Nichol; R. Romani; M. Sako; B. Bassett; A. Becker; D. Cinabro; F. DeJongh; D. L. Depoy; M. Doi; P. M. Garnavich; C. J. Hogan; S. Jha; K. Konishi; H. Lampeitl; J. L. Marshall; D. McGinnis; J. L. Prieto; A. G. Riess; M. W. Richmond; D. P. Schneider; M. Smith; N. Takanashi; K. Tokita; K. van der Heyden; N. Yasuda; C. Zheng; J. Barentine; H. Brewington; C. Choi; A. Crotts; J. Dembicky; M. Harvanek; M. Im; W. Ketzeback; S. J. Kleinman; J. Krzesi?ski; D. C. Long; E. Malanushenko; V. Malanushenko; R. J. McMillan; A. Nitta; K. Pan; G. Saurage; S. A. Snedden; S. Watters; J. C. Wheeler; D. York

2008-01-22T23:59:59.000Z

130

RELATIVISTIC SHOCK BREAKOUTS-A VARIETY OF GAMMA-RAY FLARES: FROM LOW-LUMINOSITY GAMMA-RAY BURSTS TO TYPE Ia SUPERNOVAE  

SciTech Connect

The light from a shock breakout of stellar explosions, which carries a wealth of information, strongly depends on the shock velocity at the time of the breakout. The emission from Newtonian breakouts, typical in regular core-collapse supernovae (SNe), has been explored extensively. However, a large variety of explosions result in mildly or ultrarelativistic breakouts, where the observed signature is unknown. Here we calculate the luminosity and spectrum produced by relativistic breakouts. In order to do so, we improve the analytic description of relativistic radiation-mediated shocks and follow the system from the breakout itself, through the planar phase and into the spherical phase. We limit our calculation to cases where the post-breakout acceleration of the gas ends during the planar phase (i.e., the final gas Lorentz factor {approx}< 30). We find that spherical relativistic breakouts produce a flash of gamma rays with energy, E{sub bo}, temperature, T{sub bo}, and duration, t{sup obs} b{sub o}, that provide the breakout radius ( Almost-Equal-To 5 R{sub Sun }(t{sup obs}{sub bo}/10 s)(T{sub bo}/50 keV){sup 2}) and the Lorentz factor ( Almost-Equal-To T{sub bo}/50 keV). They also always satisfy a relativistic breakout relation (t{sup obs}{sub bo}/20 s) {approx} (E{sub bo}/10{sup 46} erg){sup 1/2}(T{sub bo}/50 keV){sup -2.68}. The breakout flare is typically followed, on longer timescales, by X-rays that carry a comparable energy. We apply our model to a variety of explosions, including Type Ia and .Ia SNe, accretion-induced collapse, energetic SNe, and gamma-ray bursts (GRBs). We find that all these events produce detectable gamma-ray signals, some of which may have already been seen. Some particular examples are: (1) relativistic shock breakouts provide a natural explanation to the energy, temperature, and timescales of low-luminosity GRBs. Indeed, all observed low-luminosity GRBs satisfy the relativistic breakout relation. (2) Nearby broad-line Type Ib/c (like SN 2002ap) may produce a detectable {gamma}-ray signal. (3) Galactic Type Ia SNe may produce detectable {gamma}-ray flares. We conclude that relativistic shock breakouts provide a generic process for the production of gamma-ray flares.

Nakar, Ehud [Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel); Sari, Re'em [Racah Institute for Physics, Hebrew University, Jerusalem 91904 (Israel)

2012-03-10T23:59:59.000Z

131

Solar Wind: Manifestations of Solar Activity E N CYC LO PE D IA O F AS T R O N O MY AN D AS T R O PHYS I C S Solar Wind: Manifestations of Solar  

E-Print Network (OSTI)

Solar Wind: Manifestations of Solar Activity E N CYC LO PE D IA O F AS T R O N O MY AN D AS T R O PHYS I C S Solar Wind: Manifestations of Solar Activity The Sun's outer atmosphere, the corona, is continually heated and expands to create the solar wind. Solar activity waxes and wanes with the 11 yr cycle

Webb, David F.

132

Multi-Megawatt Organic Rankine Engine power plant (MORE). Phase IA final report: system design of MORE power plant for industrial energy conservation emphasizing the cement industry  

SciTech Connect

The Multi-Megawatt Organic Rankine Engine (MORE) program is directed towards the development of a large, organic Rankine power plant for energy conservation from moderate temperature industrial heat streams. Organic Rankine power plants are ideally suited for use with heat sources in the temperature range below 1100/sup 0/F. Cement manufacture was selected as the prototype industry for the MORE system because of the range of parameters which can be tested in a cement application. This includes process exit temperatures of 650/sup 0/F to 1110/sup 0/F for suspension preheater and long dry kilns, severe dust loading, multi-megawatt power generation potential, and boiler exhaust gas acid dew point variations. The work performed during the Phase IA System Design contract period is described. The System Design task defines the complete MORE system and its installation to the level necessary to obtain detailed performance maps, equipment specifications, planning of supporting experiments, and credible construction and hardware cost estimates. The MORE power plant design is based upon installation in the Black Mountain Quarry Cement Plant near Victorville, California.

Bair, E.K.; Breindel, B.; Collamore, F.N.; Hodgson, J.N.; Olson, G.K.

1980-01-31T23:59:59.000Z

133

THE POST-MERGER MAGNETIZED EVOLUTION OF WHITE DWARF BINARIES: THE DOUBLE-DEGENERATE CHANNEL OF SUB-CHANDRASEKHAR TYPE Ia SUPERNOVAE AND THE FORMATION OF MAGNETIZED WHITE DWARFS  

SciTech Connect

Type Ia supernovae (SNe Ia) play a crucial role as standardizable cosmological candles, though the nature of their progenitors is a subject of active investigation. Recent observational and theoretical work has pointed to merging white dwarf binaries, referred to as the double-degenerate channel, as the possible progenitor systems for some SNe Ia. Additionally, recent theoretical work suggests that mergers which fail to detonate may produce magnetized, rapidly rotating white dwarfs. In this paper, we present the first multidimensional simulations of the post-merger evolution of white dwarf binaries to include the effect of the magnetic field. In these systems, the two white dwarfs complete a final merger on a dynamical timescale, and are tidally disrupted, producing a rapidly rotating white dwarf merger surrounded by a hot corona and a thick, differentially rotating disk. The disk is strongly susceptible to the magnetorotational instability (MRI), and we demonstrate that this leads to the rapid growth of an initially dynamically weak magnetic field in the disk, the spin-down of the white dwarf merger, and to the subsequent central ignition of the white dwarf merger. Additionally, these magnetized models exhibit new features not present in prior hydrodynamic studies of white dwarf mergers, including the development of MRI turbulence in the hot disk, magnetized outflows carrying a significant fraction of the disk mass, and the magnetization of the white dwarf merger to field strengths {approx}2 Multiplication-Sign 10{sup 8} G. We discuss the impact of our findings on the origins, circumstellar media, and observed properties of SNe Ia and magnetized white dwarfs.

Ji Suoqing; Fisher, Robert T. [University of Massachusetts Dartmouth, Department of Physics, 285 Old Westport Road, North Dartmouth, MA 02740 (United States); Garcia-Berro, Enrique [Departament de Fisica Aplicada, Universitat Politecnica de Catalunya, c/Esteve Terrades, 5, E-08860 Castelldefels (Spain); Tzeferacos, Petros; Jordan, George; Lee, Dongwook [Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL 60637 (United States); Loren-Aguilar, Pablo [School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom); Cremer, Pascal [Bethe Center for Theoretical Physics, Universitaet Bonn, Nussallee 12, D-53115 Bonn (Germany); Behrends, Jan [Fachbereich Physik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin (Germany)

2013-08-20T23:59:59.000Z

134

IA_50m_Wind  

NLE Websites -- All DOE Office Websites (Extended Search)

ISDataTechnologySpecificUnitedStatesWindHighResolutionIowaWindHighResolution.zip> Description: Abstract: Annual average wind resource potential for the state of Iowa at...

135

Consolidative Involved-Node Proton Therapy for Stage IA-IIIB Mediastinal Hodgkin Lymphoma: Preliminary Dosimetric Outcomes From a Phase II Study  

SciTech Connect

Purpose: To compare the dose reduction to organs at risk (OARs) with proton therapy (PT) versus three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) in patients with mediastinal Hodgkin lymphoma (HL) enrolled on a Phase II study of involved-node radiotherapy (INRT). Methods and Materials: Between June 2009 and October 2010, 10 patients were enrolled on a University of Florida institutional review board-approved protocol for de novo 'classical' Stage IA-IIIB HL with mediastinal (bulky or nonbulky) involvement after chemotherapy. INRT was planned per European Organization for Research and Treatment of Cancer guidelines. Three separate optimized plans were developed for each patient: 3D-CRT, IMRT, and PT. The primary end point was a 50% reduction in the body V4 with PT compared with 3D-CRT or IMRT. Results: The median relative reduction with PT in the primary end point, body V4, was 51% compared with 3D-CRT (p = 0.0098) and 59% compared with IMRT (p = 0.0020), thus all patients were offered treatment with PT. PT provided the lowest mean dose to the heart, lungs, and breasts for all 10 patients compared with either 3D-CRT or IMRT. The median difference in the OAR mean dose reduction with PT compared with 3D-CRT were 10.4 Gy/CGE for heart; 5.5 Gy/CGE for lung; 0.9 Gy/CGE for breast; 8.3 Gy/CGE for esophagus; and 4.1 Gy/CGE for thyroid. The median differences for mean OAR dose reduction for PT compared with IMRT were 4.3 Gy/CGE for heart, 3.1 Gy/CGE for lung, 1.4 Gy/CGE for breast, 2.8 Gy/CGE for esophagus, and 2.7 Gy/CGE for thyroid. Conclusions: All 10 patients benefitted from dose reductions to OARs with PT compared with either 3D-CRT or IMRT. It is anticipated that these reductions in dose to OAR will translate into lower rates of late complications, but long-term follow-up on this Phase II INRT study is needed.

Hoppe, Bradford S., E-mail: bhoppe@floridaproton.org [University of Florida Proton Therapy Institute, Jacksonville, FL (United States); Flampouri, Stella; Su Zhong; Morris, Christopher G. [University of Florida Proton Therapy Institute, Jacksonville, FL (United States); Latif, Naeem [University of Florida Hematology/Oncology, Jacksonville, FL (United States); Dang, Nam H.; Lynch, James [University of Florida Hematology/Oncology, Gainesville, FL (United States); Li Zuofeng; Mendenhall, Nancy P. [University of Florida Proton Therapy Institute, Jacksonville, FL (United States)

2012-05-01T23:59:59.000Z

136

Lawrence Livermore National Laboratory Lawrence Livermore National...  

National Nuclear Security Administration (NNSA)

racks "Green" supercomputer reduces energy footprint by 75% "Green" supercomputer reduces energy footprint by 75% Lawrence Livermore National Laboratory Lawrence Livermore National...

137

"Report Date","U.S.",,,"PADD I",,,"PADD IA",,,"PADD IB",,,"PADD IC",,,"PADD II"  

U.S. Energy Information Administration (EIA) Indexed Site

Residential Heating Oil Prices (Before and After Change in Aggregation Methodology)" Residential Heating Oil Prices (Before and After Change in Aggregation Methodology)" "Report Date","U.S.",,,"PADD I",,,"PADD IA",,,"PADD IB",,,"PADD IC",,,"PADD II" ,"Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference","Old Reported Value ($ per Gallon)","New Revised Value ($ per Gallon)","Difference"

138

Lawrence Livermore National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratorys (LLNL) primary mission is research and development in support of national security. As a...

139

Lawrence Livermore National Laboratory (LLNL):Livermore Lab Report  

NLE Websites -- All DOE Office Websites (Extended Search)

Livermore Lab Report News Center Around the Lab Contacts For Reporters Livermore Lab Report News Archive News Releases Social Media & Multi Media Livermore Lab Report A weekly...

140

Rates and progenitors of type Ia supernovae  

E-Print Network (OSTI)

Propulsion Laboratory, operated under contract NAS7-030001 with the National Aeronautics and SpacePropulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space

Wood-Vasey, William Michael

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Visualizing Type Ia Supernova Explosions at NERSC  

NLE Websites -- All DOE Office Websites (Extended Search)

Childs1a-Supernovasm.png Deep inside a dying star in a galaxy far, far away, a carbon fusion flame ignites. Ignition may happen in the middle or displaced slightly to one side,...

142

Distributed Flames in Type Ia Supernovae  

E-Print Network (OSTI)

In the distributed burning regime, turbulence disrupts the internal structure of the flame, and so the idea of laminar burning propagated by conduction is no longer valid. The nature of the burning depends on the turbulent Damkohler number (Da), which steadily declines from much greater than one to less that one as the density decreases to a few 10^6 g/cc. Scaling arguments predict that the turbulent flame speed s, normalized by the turbulent intensity u, follows s/u=Da^1/2 for Da1, and that localized excursions to as much as five times u can occur. The lambda-flame speed and width can be predicted based on the turbulence in the star and the turbulent nuclear burning time scale of the fuel. We propose a practical method for measuring these based on the scaling relations and small-scale computationally-inexpensive simulations. This suggests that a simple turbulent flame model can be easily constructed suitable for large-scale distributed supernovae flames.

Aspden, A J; Woosley, S E; 10.1088/0004-637X/710/2/1654

2011-01-01T23:59:59.000Z

143

Lawrence Livermore National Laboratory  

LLNL Home. Latest News Headlines. ... Operated by Lawrence Livermore National Security, LLC, for the Department of Energy's National Nuclear Security Administration

144

Lawrence Livermore National Laboratory  

LLNL Home. Latest News Headlines. LLNL, Intel, Cray produce big data machine. November 4, 2013. ... Operated by Lawrence Livermore National Security, LLC, ...

145

Lawrence Livermore National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Livermore researchers have pioneered the formulation and application of silica aerogels, an extremely lightweight glassy material with ideal mechanical characteristics for...

146

Lawrence Livermore National Laboratory - Reports  

NLE Websites -- All DOE Office Websites (Extended Search)

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Review Reports 2013 Independent Oversight Review of the Fire Protection Program at Lawrence Livermore National Laboratory, September 2013 Independent Oversight Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory, July 2013 Activity Reports 2013 Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility, February 2013 Activity Reports 2012 Lawrence Livermore National Laboratory Site Lead Planning Activities, October 2012 Review Reports 2011 Review of Integrated Safety Management System Effectiveness at the Livermore Site Office, October 2011 Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory, September 2011

147

Print - Lawrence Livermore National Laboratory  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore ...

148

LVOC - Livermore Valley Open Campus  

NLE Websites -- All DOE Office Websites (Extended Search)

Livermore Livermore National Laboratory researchers used meteorological observations and wind farm data in conjunction with high-performance computing to help industry partners...

149

Search - Lawrence Livermore National Laboratory  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore ...

150

Lawrence Livermore National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

team are using Livermore's 6.2-meter-long, two-stage, light-gas gun to conduct their shock experiments on organic liquids. They are focusing initially on cometary impacts. For...

151

1 | EqIA Summary| Diversity Team| 08/12/08 EqIA Summary  

E-Print Network (OSTI)

) Summary of Impact There are no direct or significant adverse impacts on Race, Gender, Disability, Sexual, in particular benefits relating to age as there will be a strong focus on bio energy, which will support fuel

152

Independent Activity Report, Lawrence Livermore National Laboratory...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Livermore National Laboratory Operational Drill at the B332 Plutonium Facility HIAR LLNL-2013-02-27 The Livermore Site Office (LSO) and Lawrence Livermore National Security,...

153

Print - Lawrence Livermore National Laboratory  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore National Security, LLC ...

154

Technologies - Lawrence Livermore National Laboratory  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore National Security, LLC ...

155

Search - Lawrence Livermore National Laboratory  

Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988 Operated by Lawrence Livermore National Security, LLC ...

156

Technologies - Lawrence Livermore National Laboratory  

Nuclear & Radiological. ... Operated by Lawrence Livermore National Security, LLC, for the Department of Energy's National Nuclear Security Administration

157

Application - Lawrence Livermore National Laboratory  

Search & Browse Software: Licensing Instructions: Patents: Application. Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 ...

158

Lab Spotlight: Lawrence Livermore National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Lawrence Livermore National Laboratory Designing Biocompatible Microelectronics Pioneering work with polymer-based microfabrication methods at Lawrence Livermore National...

159

LVOC - Livermore Valley Open Campus  

NLE Websites -- All DOE Office Websites (Extended Search)

LVOC - Livermore Valley Open Campus LVOC - Livermore Valley Open Campus ↓ Case Studies | ↓ About LVOC Get to market faster Making the impossible possible Lawrence Livermore and Sandia National Laboratories are home to some of the world's most unique state-of-the art facilities and resources. For decades, we have been using our combined capabilities, including a workforce of over 7000 employees to solve complex problems for the nation. Visit the science and technology epicenter - the Livermore Valley Open Campus - just east of San Francisco in the Tri-Valley's innovation ecosystem to find out what problems we can solve for you. LVOC Flyer We Keep Industry on the Cutting Edge of Innovative Technology About the Livermore Valley Open Campus LVOC Rendering Open for Business: The Livermore Valley Open Campus is located at the

160

Lawrence Livermore National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

March/April 2008 March/April 2008 4 Lawrence Livermore National Laboratory Extending the Search for Extending the Search for A new imager will allow astrophysicists to study the atmospheres of distant planets. T HE discovery of other solar systems beyond ours has been the stuff of science fiction for decades. Great excitement greeted the positive identification of the first planet outside our solar system in 1995. Since then, scientists have identified approximately 250 extrasolar planets (exoplanets), but they have had no way to study the majority of these planets or their

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

UC Regents Visit Lawrence Livermore  

NLE Websites -- All DOE Office Websites (Extended Search)

of a regional-scale earthquake simulation at TSF and were briefed on the Lab's response to the Fukushima Daiichi power plant disaster in Japan. Livermore Mayor John...

162

Technologies - Lawrence Livermore National Laboratory  

LLNL Home. Latest News Headlines. ... Operated by Lawrence Livermore National Security, LLC, for the Department of Energy's National Nuclear Security Administration

163

Search - Lawrence Livermore National Laboratory  

Giving animals in need a HOME. November 14, 2013. LLNL, Intel, Cray produce big data machine. ... Operated by Lawrence Livermore National Security, LLC, ...

164

Print - Lawrence Livermore National Laboratory  

... or in home healthcare settings. ... Operated by Lawrence Livermore National Security, LLC, for the Department of Energy's National Nuclear Security Administration

165

Technologies - Lawrence Livermore National Laboratory  

Information & Communication. Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988

166

Lawrence Livermore National Laboratory (LLNL):  

NLE Websites -- All DOE Office Websites (Extended Search)

IPO Fact Sheet Strategic Diversity Program Lawrence Livermore National Laboratory (LLNL) works with other national laboratories to coordinate and integrate programmatic...

167

LIVERMORE SITE OFFICE CONTRACT MANAGEMENT PLAN For LAWRENCE LIVERMORE NATIONAL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LIVERMORE SITE OFFICE CONTRACT MANAGEMENT PLAN For LAWRENCE LIVERMORE NATIONAL LABORATORY CONTRACT NO. DE-AC52-07NA27344 LSO_CMP_6-10-088 i CONTENTS Contents 1. INTRODUCTION.............................................................................................................. 3 2. PURPOSE .......................................................................................................................... 3 2.2 Maintenance and Distribution ......................................................................................... 4 3. CONTRACT SUMMARY AND PRINCIPAL FEATURES............................................. 4 3.1 Contract Summary ...........................................................................................................

168

Independent Oversight Review, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - September 2011 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2011 September 2011 Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory The purpose of this review was to assess the effectiveness of the integrated safety management system (ISMS) established and implemented by Lawrence Livermore National Laboratory (LLNL). Independent Oversight Review, Lawrence Livermore National Laboratory - September 2011 More Documents & Publications Independent Oversight Inspection of Environment, Safety, and Health Management at the Lawrence Livermore National Laboratory, Technical Appendices, Volume II, December 2004 Independent Oversight Inspection, Lawrence Livermore National Laboratory,

169

Livermore Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

| Sign Up Search Page Edit with form History Facebook icon Twitter icon Livermore Biomass Facility Jump to: navigation, search Name Livermore Biomass Facility Facility...

170

Independent Activity Report, Lawrence Livermore National Laboratory...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

February 2013 Independent Activity Report, Lawrence Livermore National Laboratory - February 2013 February 2013 Lawrence Livermore National Laboratory Operational Drill at the B332...

171

Independent Oversight Inspection, Lawrence Livermore National Laboratory- February 2009  

Energy.gov (U.S. Department of Energy (DOE))

Inspection of Emergency Management at the Livermore Site Office and Lawrence Livermore National Laboratory

172

Technologies - Lawrence Livermore National Laboratory  

Harmonic Air Motor; Two Stage Engine Technology; Industrial Partnerships Office P.O. Box 808, L-795 Livermore, CA 94551 Phone: (925) 422-6416 Fax: (925) 423-8988

173

Lawrence Livermore National Laboratory: Phonebook  

NLE Websites -- All DOE Office Websites (Extended Search)

Phonebook Phonebook Address and Phone Numbers Lawrence Livermore National Laboratory 7000 East Ave., Livermore, CA 94550-9234( For deliveries, enter off of Greenville Road) P.O. Box 808, Livermore, CA 94551-0808 (Mail) Main Operator (925) 422-1100 Fax (925) 422-1370, Fax verification (925) 422-1100 Employment Verification Hot Line (925) 422-9348 Public Affairs (925) 422-4599 Search for individuals by last name or full name. Use * for a wildcard. Phonebook: Warning: This Electronic Phonebook is provided solely for official use by the Lawrence Livermore National Laboratory community. Using information obtained from this Phonebook to contact individuals for purposes other than official Laboratory business is forbidden. If you have any questions, please contact Public Affairs at (925) 422-4599.

174

Lawrence Livermore National Laboratory | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory | July 2011 Aerial View Lawrence Livermore National Laboratory | July 2011 Aerial View Lawrence Livermore National Laboratory's (LLNL) primary mission is research and development in support of national security. As a nuclear weapons design laboratory, LLNL has responsibilities in nuclear stockpile stewardship. LLNL also applies its expertise to prevent the spread and use of weapons of mass destruction and strengthen homeland security. Other areas include advanced defense technologies, energy, environment, biosciences, and basic science. Enforcement July 22, 2013 Enforcement Letter, NEL-2013-03 Issued to Lawrence Livermore National Security, LLC related to Programmatic

175

Enforcement Documents - Lawrence Livermore National Laboratory | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Enforcement Documents - Lawrence Livermore National Laboratory July 22, 2013 Enforcement Letter, NEL-2013-03 Issued to Lawrence Livermore National Security, LLC related to Programmatic Deficiencies in the Software Quality Assurance Program at the Lawrence Livermore National Laboratory February 23, 2006 Preliminary Notice of Violation, University of California - EA-2006-01 Preliminary Notice of Violation issued to the University of California related to Radiological Uptakes, a Radioactive Material Spill, and Radiological Protection Program, Quality Assurance, and Safety Basis Deficiencies at the Lawrence Livermore National Laboratory June 2, 2005 Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005

176

Independent Activity Report, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Activity Report, Lawrence Livermore National Laboratory Activity Report, Lawrence Livermore National Laboratory - October 2012 Independent Activity Report, Lawrence Livermore National Laboratory - October 2012 October 2012 Lawrence Livermore National Laboratory Site Lead Planning Activities [HIAR LLNL-2012-10-23] The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013. Independent Activity Report, Lawrence Livermore National Laboratory -

177

2013 Annual Planning Summary for the Lawrence Livermore National...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Laboratory 2013 Annual Planning Summary for the Lawrence Livermore National Laboratory 2013 Annual Planning Summary for the Lawrence Livermore National...

178

Part I--A Rational Aerodynamic Design Procedure  

E-Print Network (OSTI)

'The design of a turbine stage is described in which all leading parameters (stage loading, flow coefficient, pitch/chord ratio, blade profile shape and aspect ratio) have been selected conservatively to accord with current ideas for ensuring a reasonably high level of aerodynamic efficiency. From consideration of the influence of stage loading KpAT V~ U,2, flow coefficient ~ and rotor exit swirl angle c ~ 3, the stage design was selected such that these parameters were 1.15, 0.65 and 10 degrees respectively. At the design speed of U ~ = 34 the resulting stage pressure ratio is approximately 1.65. Such a stage duty is 'light ' by aero engine standards but very comparable to much industrial gas turbine design practice. Blade spacing and profile shapes are 'finally selected in such a way as to preclude severe opposing pressure gradients on the suction surface which might result in local separation of the boundary layer from the blade surfaces. The methods applied and described for predicting blade surface velocities are simple and approximate only, and might readily be imitated by designers not wishing or able to exploit more elaborate and complex digital techniques.

M. No; D. J. L. Smith; I. H. Johnston; D. J. L. Smith; D. J. Fullbrook; D. J. L. Smith; I. H. Johnston

1967-01-01T23:59:59.000Z

179

K-corrections and spectral templates of Type Ia supernovae  

E-Print Network (OSTI)

Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space

Hsiao, E. Y.

2008-01-01T23:59:59.000Z

180

The complete mitochondrial genome of Articulate Brachiopod Terebratal ia transversa  

SciTech Connect

We have sequenced the complete mitochondrial DNA (mtDNA) of the articulate brachiopod Terebratalia transversa. The circular genome is 14,291 bp in size, relatively small compared to other published metazoan mtDNAs. The 37 genes commonly found in animal mtDNA are present; the size decrease is due to the truncation of several tRNA, rRNA, and protein genes, to some nucleotide overlaps, and to a paucity of non-coding nucleotides. Although the gene arrangement differs radically from those reported for other metazoans, some gene junctions are shared with two other articulate brachiopods, Laqueus rubellus and Terebratulina retusa. All genes in the T. transversa mtDNA, unlike those in most metazoan mtDNAs reported, are encoded by the same strand. The A+T content (59.1 percent) is low for a metazoan mtDNA, and there is a high propensity for homopolymer runs and a strong base-compositional strand bias. The coding strand is quite G+T-rich, a skew that is shared by the confamilial (laqueid) specie s L. rubellus, but opposite to that found in T. retusa, a cancellothyridid. These compositional skews are strongly reflected in the codon usage patterns and the amino acid compositions of the mitochondrial proteins, with markedly different usage observed between T. retusa and the two laqueids. This observation, plus the similarity of the laqueid non-coding regions to the reverse complement of the non-coding region of the cancellothyridid, suggest that an inversion that resulted in a reversal in the direction of first-strand replication has occurred in one of the two lineages. In addition to the presence of one non-coding region in T. transversa that is comparable to those in the other brachiopod mtDNAs, there are two others with the potential to form secondary structures; one or both of these may be involved in the process of transcript cleavage.

Helfenbein, Kevin G.; Brown, Wesley M.; Boore, Jeffrey L.

2001-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

IA/Cyber Defense Brief for USAREUR Land EXPO  

Science Conference Proceedings (OSTI)

... Duty, Honor, Country. The Unholy Alliances. Spam Entrepreneurs; Adware / Spyware Providers; File Sharers; Phishers; Porn Purveyors; Hackers. ...

2007-11-15T23:59:59.000Z

182

www.ias.edu/rise Science Initiative Group  

E-Print Network (OSTI)

funds. He has an ally in Heneri Dzinotyiweyi, the Minister for Science and Technology Development as a regional research facility and as the coordinating hub of a regional network. The 60 computer users ­ staff

183

The SN Ia Rate in High-Redshift Galaxy Clusters  

NLE Websites -- All DOE Office Websites (Extended Search)

Lin, Y.-T. & Mohr, J. J. 2004, ApJ, 617, 879 Livio, M. 2001, in Supernovae and Gamma-Ray Bursts: the Greatest Explosions since the Big Bang, ed. M. Livio, N. Panagia, & K....

184

UMore Ph IA CR Report 7-8-10.pdf  

NLE Websites -- All DOE Office Websites (Extended Search)

associated with construction of the wind turbine, 34.5 kV interconnect line, meteorologic tower, and associated roads and laydown areas, which encompasses approximately 33.25 acres...

185

Next-Generation Petascale Simulations of Type Ia Supernovae ...  

NLE Websites -- All DOE Office Websites (Extended Search)

deflagration to detonation transition model Deflagration to detonation transition model. Min lOng, Dan van Rossum, Sean Couch, George Jordan, Brad Gallagher, Don Lamb, University...

186

Closest Type Ia Supernova in Decades Solves a Cosmic Mystery  

NLE Websites -- All DOE Office Websites (Extended Search)

use to measure cosmic growth, a technique that in 1998 led to the discovery of dark energy - and 13 years later to a Nobel Prize, "for the discovery of the accelerating...

187

UNU-IAS Policy Report Biofuels in Africa  

E-Print Network (OSTI)

. Currently, liquid biofuels (e.g. bioethanol and biodiesel) produced from edible plants or animal fats/power generation (FAO, 2009; IEA, 2004). Currently, liquid biofuels (e.g. bioethanol and biodiesel) are by far) and conversion technology used, biofuels can be distinguished as first- and second-generation biofuels.2 First

188

Distributed Flames in Type Ia Supernovae A. J. Aspden1  

E-Print Network (OSTI)

generator trip controller AEC Canada, Ont. Hydro Nuclear reactor controller Argonne Token­based ACS of axioms of the logical theory. Part 2, 32.1.6 In summary, the practical options for Formal Arguments Case Studies: Verification Software Domain SACEM (Paris metro) GEC Alsthom, RATP Darlington nuclear

189

Expanding Your Horizons Conference, Lawrence Livermore National...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lab Expanding Your Horizons Conference, Lawrence Livermore National Lab August 1, 2013 2:45PM EDT to August 31, 2013 3:45PM EDT University of the...

190

Lawrence Livermore announces voluntary separation program  

NLE Websites -- All DOE Office Websites (Extended Search)

| NR-13-05-02 Lawrence Livermore announces voluntary separation program Lynda L Seaver, LLNL, (925) 423-3103, seaver1@llnl.gov Printer-friendly Lawrence Livermore National...

191

Lawrence Livermore National Laboratory, Former Production Workers...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laboratory, Former Production Workers Screening Projects Lawrence Livermore National Laboratory, Former Production Workers Screening Projects Project Name: Worker Health Protection...

192

Lawrence Livermore National Laboratory (LLNL): News Releases...  

NLE Websites -- All DOE Office Websites (Extended Search)

Trek: Into Darkness" (5162013) Renewable energy demonstration project (5142013) LLNL announces voluntary separation program (582013) RFI released for Livermore Valley...

193

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Gasoline and Diesel Fuel Update (EIA)

accomplishments accomplishments are impressive in themselves, and associ- ated with each milestone is the expansion of future produc- tion opportunities as another technical barrier is overcome. The extension of recovery opportunities into deep water has established the deep offshore as an area of considerable national significance. A second source of increased supply is gas from coalbed formations. Natural gas production from coalbed methane fields continued to grow in 1996 as projects initiated mainly in the early to mid 1990's matured through the dewatering phase into higher rates of gas production. Coalbed forma- tions contribute almost 1 trillion cubic feet, roughly 5 per- cent, to total U.S. production. Continued production growth from coalbeds is not likely in light of the precipitous drop in new wells completed in coalbed formations since the termination of the production tax

194

NJ WY AK AL CA AR CO CT DE FL GA HI ID KS IL IN IA IA KY LA  

Annual Energy Outlook 2012 (EIA)

857, "Monthly Report of Natural Gas Purchases and Deliveries to Consumers." 0.00-1.99 2.00-2.99 3.00-3.99 4.00-4.99 5.00-5.99 6.00-6.99 7.00+ 15. Average City Gate Price of Natural...

195

Independent Oversight Inspection, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Inspection, Lawrence Livermore National Inspection, Lawrence Livermore National Laboratory - May 2007 Independent Oversight Inspection, Lawrence Livermore National Laboratory - May 2007 May 2007 Inspection of Environment, Safety, and Health Programs at the Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE) Office of Independent Oversight, within the Office of Health, Safety and Security (HSS), conducted an inspection of environment, safety, and health (ES&H) programs at the DOE Lawrence Livermore National Laboratory (LLNL) during January and February 2007. The inspection was performed by Independent Oversight's Office of Environment, Safety and Health Evaluations. LSO's oversight has matured, and operational awareness and assessments have improved in gathering data and identifying deficiencies. LSO

196

Livermore Contract Announcement | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Livermore Contract Announcement Livermore Contract Announcement Livermore Contract Announcement May 8, 2007 - 12:45pm Addthis Remarks as Prepared for Energy Secretary Samuel Bodman Good afternoon. Thank you all for coming and welcome to the Lawrence Livermore National Laboratory employees who are watching this on our Webcast. I know my remarks are of special importance to you. The Lawrence Livermore National Laboratory opened in 1952 using the "team science" approach pioneered by Ernest O. Lawrence. Livermore was - and is - a place where "new ideas" are dominant. Few would have predicted back then how deeply the work conducted at Lawrence Livermore would influence the course of history. And yet it has. Today is the 123rd anniversary of President Harry S Truman's birth. The first Cold War president, Truman's decisive

197

Oversight Reports - Lawrence Livermore National Laboratory | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Oversight Reports - Lawrence Livermore National Laboratory October 2, 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory July 19, 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory April 12, 2013 Independent Activity Report, Lawrence Livermore National Laboratory - February 2013 Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility [HIAR LLNL-2013-02-27] December 18, 2012 Independent Activity Report, Lawrence Livermore National Laboratory -

198

Independent Oversight Inspection, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - June 2005 Independent Oversight Inspection, Lawrence Livermore National Laboratory - June 2005 June 2005 Inspection of Emergency Management at the Livermore Site Office and Lawrence Livermore National Laboratory The Secretary of Energy's Office of Independent Oversight and Performance Assurance (OA), within the Office of Security and Safety Performance Assurance, conducted an inspection of the emergency management program at the U.S. Department of Energy (DOE) Lawrence Livermore National Laboratory (LLNL) site in June 2005. The inspection was performed by the OA Office of Emergency Management Oversight. This 2005 OA inspection determined that LLNL has completed program development work or has established an appropriate framework for nearly all

199

Independent Oversight Inspection, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - February 2009 Independent Oversight Inspection, Lawrence Livermore National Laboratory - February 2009 February 2009 Inspection of Emergency Management at the Livermore Site Office and Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE) Office of Independent Oversight inspected the emergency management program at DOE's Lawrence Livermore National Laboratory (LLNL) in October/November 2008. The inspection was performed by Independent Oversight's Office of Emergency Management Oversight. This 2008 inspection found that overall, the LLNL emergency management program is, with a few exceptions, well defined and better implemented in most areas than observed during previous inspections, but some implementation weaknesses remain that diminish the ability of the program

200

Categorical Exclusion Determinations: Lawrence Livermore Site Office |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore Site Lawrence Livermore Site Office Categorical Exclusion Determinations: Lawrence Livermore Site Office Categorical Exclusion Determinations issued by Lawrence Livermore Site Office. DOCUMENTS AVAILABLE FOR DOWNLOAD September 18, 2012 CX-010083: Categorical Exclusion Determination Radiography of Explosive Samples B321C CX(s) Applied: B3.6 Date: 09/18/2012 Location(s): California Offices(s): Lawrence Livermore Site Office September 18, 2012 CX-009257: Categorical Exclusion Determination Radiography of Explosive Samples B321C CX(s) Applied: B3.6 Date: 09/18/2012 Location(s): California Offices(s): Lawrence Livermore Site Office May 14, 2012 CX-008172: Categorical Exclusion Determination High-Pressure Crogenic Pump and Hydrogen Filling Station CX(s) Applied: B5.15 Date: 05/14/2012

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Lawrence Livermore National Laboratory | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Home > About Us > Our Operations > Acquisition and Project Management > M & O Support Department > Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory DE-AC52-07NA27344 Operated by Lawrence Livermore National Security, LLC BASIC Contract (Official) Modifications (Official) Funding Mods Available Upon Request Conformed Contract (Unofficial) LLNL Sec A (SF33) (pdf, 91KB) See Modifications Section under Conformed Contract Link LLNS Conformed Contract (weblink) LLNL Sec B-H (pdf, 306KB) LLNL Sec I pdf 687KB LLNL Sec J Appx A (pdf, 67KB) LLNL Sec J Appx B (pdf, 191KB) LLNL Sec J Appx C (pdf, 11KB) LLNL Sec J Appx D (pdf, 18KB)

202

Lawrence Livermore National Laboratory | Open Energy Information  

Open Energy Info (EERE)

Livermore National Laboratory Livermore National Laboratory (Redirected from Lawrence Livermore National Lab) Jump to: navigation, search Logo: Lawrence Livermore National Laboratory Name Lawrence Livermore National Laboratory Address 7000 East Ave. Place Livermore, California Zip 94550-9234 Number of employees 5001-10,000 Year founded 1952 Notes LLNL-WEB-422768 Coordinates 37.6798282°, -121.7107786° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.6798282,"lon":-121.7107786,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

203

Independent Activity Report, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

October 2012 October 2012 Independent Activity Report, Lawrence Livermore National Laboratory - October 2012 October 2012 Lawrence Livermore National Laboratory Site Lead Planning Activities [HIAR LLNL-2012-10-23] The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013. Independent Activity Report, Lawrence Livermore National Laboratory - October 2012 More Documents & Publications

204

Sandia National Laboratories: Locations: Livermore, California...  

NLE Websites -- All DOE Office Websites (Extended Search)

in the cities, on the beaches, and in the mountains. Top 15 hometowns of SandiaCalifornia employees Livermore (34%) Tracy (8%) Pleasanton (5%) Dublin (4%) Oakland (3%)...

205

Former Worker Medical Screening Program - Lawrence Livermore...  

NLE Websites -- All DOE Office Websites (Extended Search)

Livermore National Laboratory Former Workers Former Worker Medical Screening Program (FWP) Project Name: Worker Health Protection Program Covered DOE Site: LLNL...

206

Lawrence Livermore National Laboratory opens High Performance...  

NLE Websites -- All DOE Office Websites (Extended Search)

06302011 | NR-11-06-08 Lawrence Livermore National Laboratory opens High Performance Computing Innovation Center for collaboration with industry Donald B Johnston, LLNL,...

207

Independent Activity Report, Lawrence Livermore National Laboratory...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

October 2012 Lawrence Livermore National Laboratory Site Lead Planning Activities HIAR LLNL-2012-10-23 The purpose of this Office of Health, Safety and Security (HSS) Independent...

208

Lawrence Livermore National Laboratory (LLNL): Business Opportunities  

NLE Websites -- All DOE Office Websites (Extended Search)

IPO Fact Sheet Strategic Diversity Program Lawrence Livermore National Laboratory (LLNL) spends approximately 650,000,000 annually through procurements to a diverse group of...

209

Independent Oversight Review, Lawrence Livermore National Laboratory...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

a review of nuclear safety programs at the DOE Lawrence Livermore National Laboratory (LLNL) from October through November 2009. The review was performed by the HSS Office of...

210

Lawrence Livermore announces new strategic national security...  

NLE Websites -- All DOE Office Websites (Extended Search)

Livermore announces new strategic national security assignments Lynda L Seaver, LLNL, (925) 423-3103, seaver1@llnl.gov Printer-friendly Bruce Goodwin Photos by Julie...

211

Outline of UCRL-Livermore Rover Program  

SciTech Connect

This report describes the development plan, and problems which would be addressed, for the nuclear rocket engine design/UCRL-Livermore ROVER.

York, H.F.

1995-09-01T23:59:59.000Z

212

Harmonic Air Motor - Lawrence Livermore National Laboratory  

Current Weather. Protocol Office. Where to stay. Tri-Valley Visitors Bureau. City of Livermore. Community. Our Community. Discovery Center. ... such ...

213

Independent Oversight Review, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - September 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2013 September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory This report documents the results of an independent oversight review of the fire protection program at the Lawrence Livermore National Laboratory. The review was performed June 10-21, 2013, by the U.S. Department of Energy's (DOE) Office of Safety and Emergency Management Evaluations, which is within the DOE Office of Health, Safety and Security. The review was one part of a targeted assessment of fire protection at nuclear facilities across the DOE complex, including National Nuclear Security Administration sites. The purpose of the Independent Oversight targeted assessment was to

214

Independent Oversight Review, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - September 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - September 2013 September 2013 Review of the Fire Protection Program at Lawrence Livermore National Laboratory This report documents the results of an independent oversight review of the fire protection program at the Lawrence Livermore National Laboratory. The review was performed June 10-21, 2013, by the U.S. Department of Energy's (DOE) Office of Safety and Emergency Management Evaluations, which is within the DOE Office of Health, Safety and Security. The review was one part of a targeted assessment of fire protection at nuclear facilities across the DOE complex, including National Nuclear Security Administration sites. The purpose of the Independent Oversight targeted assessment was to

215

Independent Oversight Review, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Review, Lawrence Livermore National Review, Lawrence Livermore National Laboratory - December 2009 Independent Oversight Review, Lawrence Livermore National Laboratory - December 2009 December 2009 Review of Nuclear Safety at the Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE), Office of Health, Safety and Security (HSS), performed a review of nuclear safety programs at the DOE Lawrence Livermore National Laboratory (LLNL) from October through November 2009. The review was performed by the HSS Office of Independent Oversight's Office of Environment, Safety and Health (ES&H) Evaluations. LLNL has made significant progress in establishing and implementing comprehensive programs to effectively manage nuclear safety. LLNL has devoted considerable management attention and resources to enhance nuclear

216

Independent Oversight Inspection, Lawrence Livermore National Laboratory,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Inspection, Lawrence Livermore National Inspection, Lawrence Livermore National Laboratory, Volume I - December 2004 Independent Oversight Inspection, Lawrence Livermore National Laboratory, Volume I - December 2004 December 2004 Inspection of Environment, Safety, and Health Management at the Lawrence Livermore National Laboratory The U.S. Department of Energy (DOE) Office of Independent Oversight and Performance Assurance (OA), within the Office of Security and Safety Performance Assurance (SSA), conducted an inspection of environment, safety, and health (ES&H) at the DOE Lawrence Livermore National Laboratory (LLNL) during October and November 2004. The inspection was performed by the OA Office of Environment, Safety and Health Evaluations. LSO and LLNL have established ISM systems that are conceptually sound but

217

Environmental Survey preliminary report, Lawrence Livermore National Laboratory, Livermore, California  

SciTech Connect

This report presents the preliminary findings from the first phase of the Environmental Survey of the Department of Energy (DOE) Lawrence Livermore National Laboratory (LLNL), conducted December 1 through 19, 1986. The Survey is being conducted by an interdisciplinary team of environmental specialists, led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Individual team components are being supplied by a private contractor. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with LLNL. The Survey covers all environmental media all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations performed at LLNL, and interviews with site personnel. A Sampling and Analysis Plan was developed to assist in further assessing certain of the environmental problems identified during performance of on-site activities. The Sampling and Analysis Plan will be executed by a DOE National Laboratory. When completed, the results will be incorporated into the LLNL Environmental Survey Interim Report. The Interim Report will reflect the final determinations of the LLNL Survey. 70 refs., 58 figs., 52 tabs.,

Not Available

1987-12-01T23:59:59.000Z

218

Independent Activity Report, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

February 2013 February 2013 Independent Activity Report, Lawrence Livermore National Laboratory - February 2013 February 2013 Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility [HIAR LLNL-2013-02-27] The Livermore Site Office (LSO) and Lawrence Livermore National Security, LLC (LLNS) requested personnel from the U.S. Department of Energy (DOE) Office of Safety and Emergency Management Evaluations (HS-45) to observe an operational drill at the Plutonium Facility in Building 332 (B332). LSO and LLNS desired HS-45's participation to help determine the maturity of the operational drill program by providing independent expertise in the matter at a time when HS-45 personnel were already on site conducting an emergency management review. LLNS administered this operational drill using the DOE guidance for

219

Sandia National Laboratories: Locations: Livermore, California...  

NLE Websites -- All DOE Office Websites (Extended Search)

81,000, the city of Livermore maintains a local personality. Whether you are a sports fan, wine connoisseur, or outdoor enthusiast, you will have plenty to see and do. Pavilion...

220

Science on Saturday @ Lawrence Livermore Lab  

Energy.gov (U.S. Department of Energy (DOE))

Science on Saturday. Science on Saturday (SOS) is a series of science lectures for middle and high school students. Each topic highlights cutting-edge science occurring at the Lawrence Livermore...

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Independent Oversight Inspection, Lawrence Livermore National...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

at the U. S. Department of Energy (DOE) Lawrence Livermore National Laboratory (LLNL) in June 2002. The inspection was performed as a joint effort by the OA Office of...

222

CES-21 board meets at Lawrence Livermore  

NLE Websites -- All DOE Office Websites (Extended Search)

1613ces 04162013 CES-21 board meets at Lawrence Livermore James A Bono, LLNL, (925) 422-9919, bono4@llnl.gov Printer-friendly LLNL's Computation Associate Director Dona Crawford...

223

Independent Oversight Review, Lawrence Livermore National Laboratory- July 2013  

Energy.gov (U.S. Department of Energy (DOE))

Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory

224

Independent Oversight Inspection, Lawrence Livermore National Laboratory- May 2007  

Energy.gov (U.S. Department of Energy (DOE))

Inspection of Environment, Safety, and Health Programs at the Lawrence Livermore National Laboratory

225

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - EA-2000-12 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 September 27, 2000 Preliminary Notice of Violation issued to the University of California related to Authorization Basis Issues at the Lawrence Livermore National Laboratory, (EA-2000-12) This letter refers to the Department of Energy's (DOE) investigation of the facts and circumstances concerning Lawrence Livermore National Laboratory (LLNL) maintenance and adherence to documents, which form the Authorization Basis (AB) for the Laboratory's nuclear facilities. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 More Documents & Publications Enforcement Letter, Lawrence Livermore National Laboratory - November 5,

226

Sandia National Laboratories: Locations: Livermore, California  

NLE Websites -- All DOE Office Websites (Extended Search)

Livermore, California Livermore, California Livermore, California administration building For more than 50 years, the California campus of Sandia National Laboratories has delivered essential science and technology to resolve the nation's most challenging security issues. Many of these challenges - like energy resources, transportation, immigration, ports, and more - surfaced early in the state of California, providing Sandia/California with a special opportunity to participate in the first wave of solutions to important national problems. For example, Sandia's scientists are breaking new ground in energy research and are helping to accelerate the development of next-generation biofuels so that we can reduce our nation's dependence on foreign oil and mitigate the effects of global climate change.

227

Lawrence Livermore National Laboratory | Open Energy Information  

Open Energy Info (EERE)

National Laboratory National Laboratory Jump to: navigation, search Logo: Lawrence Livermore National Laboratory Name Lawrence Livermore National Laboratory Address 7000 East Ave. Place Livermore, California Zip 94550-9234 Number of employees 5001-10,000 Year founded 1952 Notes LLNL-WEB-422768 Coordinates 37.6798282°, -121.7107786° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.6798282,"lon":-121.7107786,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

228

Record simulations conducted on Lawrence Livermore supercomputer  

NLE Websites -- All DOE Office Websites (Extended Search)

5 5 For immediate release: 03/19/2013 | NR-13-03-05 Record simulations conducted on Lawrence Livermore supercomputer Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov Printer-friendly OSIRIS simulation on Sequoia of the interaction of a fast-ignition-scale laser with a dense DT plasma. The laser field is shown in green, the blue arrows illustrate the magnetic field lines at the plasma interface and the red/yellow spheres are the laser-accelerated electrons that will heat and ignite the fuel. High Resolution Image LIVERMORE, Calif. -- Researchers at Lawrence Livermore National Laboratory have performed record simulations using all 1,572,864 cores of Sequoia, the largest supercomputer in the world. Sequoia, based on IBM BlueGene/Q architecture, is the first machine to exceed one million computational

229

Researcher, Lawrence Livermore National Laboratory | National Nuclear  

National Nuclear Security Administration (NNSA)

Bruce Macintosh Bruce Macintosh Researcher, Lawrence Livermore National Laboratory Bruce Macintosh Bruce Macintosh Role: Researcher, Lawrence Livermore National Laboratory Award: AAAS Newcomb Cleveland Prize Profile: A Lawrence Livermore National Laboratory researcher's paper published in November 2008 is co-winner of this year's American Association for the Advancement of Science (AAAS) Newcomb Cleveland Prize. The Paper is one of two outstanding papers published in Science from June 1, 2008 through May 31, 2009. Bruce Macintosh of the Physics and Life Science Directorate was one of the lead authors of the paper titled, "Direct Imaging of Multiple Planets orbiting the Star HR 8799," which appeared in the Nov. 28, 2008 edition of Science. Christian Marois, a former LLNL postdoc now at NRC Herzberg

230

Independent Oversight Review, Lawrence Livermore National Laboratory - July  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Independent Oversight Review, Lawrence Livermore National Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 July 2013 Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory The Office of Enforcement and Oversight (Independent Oversight), within the Office of Health, Safety and Security (HSS), conducted an independent review of the National Nuclear Security Administration (NNSA) Livermore Field Office (LFO) and Lawrence Livermore National Laboratory (LLNL) Site 200 preparedness for severe natural phenomena events (NPEs). The HSS Office of Safety and Emergency Management Evaluations performed this review to evaluate the processes for identifying emergency response capabilities and

231

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - EA-2003-04 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 September 3, 2003 Preliminary Notice of Violation issued to the University of California related to an Extremity Radiological Overexposure at the Lawrence Livermore National Laboratory, (EA-2003-04) This letter refers to the recent investigation by the Department of Energy's Office of Price-Anderson Enforcement (OE) of the June 2002 extremity radiological overexposure event. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 More Documents & Publications Preliminary Notice of Violation, University of California - EA-2006-01 Preliminary Notice of Violation, Lawrence Livermore National Laboratory -

232

Lawrence Livermore National Laboratory December 13, 2004  

E-Print Network (OSTI)

John Lindl Lawrence Livermore National Laboratory December 13, 2004 The NIF Ignition Program Presentation to Fusion Power Associates Meeting #12;NIF-0202-0XXXXppt 15/GHM/tr Outline · Ignition Introduction 104 105 500 50 5 0.5 Capsule energy (KJ) NIF Relaxed pressure and stability requirements

233

Lawrence Livermore National Laboratory Kimberly S. Budil  

E-Print Network (OSTI)

. Steven E. Koonin Under Secretary for Nuclear Security/NNSA Administrator Thomas P. D'Agostino Asst Livermore National Laboratory Historically, most HEDS research has been sponsored by NNSA NNSA's HEDP) Motivated and encouraged by National Academy/workshop reports: Federal response SC/NNSA: Joint Program

Shyy, Wei

234

DOE Selects Lawrence Livermore National Security, LLC to Manage its  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Security, LLC to Manage its Lawrence Livermore National Security, LLC to Manage its Lawrence Livermore National Laboratory DOE Selects Lawrence Livermore National Security, LLC to Manage its Lawrence Livermore National Laboratory May 8, 2007 - 12:45pm Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced that Lawrence Livermore National Security, LLC (LLNS) has been selected to be the management and operating contractor for DOE's National Nuclear Security Administration's (NNSA) Lawrence Livermore National Laboratory in California. "Livermore National Laboratory is a critical part of our nuclear weapons complex and has been for the last 55 years," Secretary Bodman said. "For the first time since the beginning of the laboratory a new contractor is

235

Search process for Lawrence Livermore director, LLNS president...  

NLE Websites -- All DOE Office Websites (Extended Search)

6.13search 11262013 Search process for Lawrence Livermore director, LLNS president gets under way Lynda L Seaver, LLNL, (925) 423-3103, seaver1@llnl.gov LIVERMORE, Calif. - The...

236

Enforcement Letter, Lawrence Livermore National Laboratory- June 2, 2005  

Energy.gov (U.S. Department of Energy (DOE))

Enforcement Letter Issued to Lawrence Livermore National Laboratory for Quality Assurance Deficiencies related to Weapon Activities, June 2, 2005

237

Independent Activity Report, Lawrence Livermore National Laboratory- March 2011  

Energy.gov (U.S. Department of Energy (DOE))

Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program Effectiveness Review [HIAR-LLNL-2011-03-25

238

Evaluation of HotSpot, Lawerence Livermore National Laboratory...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nasstrom accepting the revised Hotspot More Documents & Publications Excessing of Computers Used for Unclassified Controlled Information at Lawrence Livermore National...

239

Technical Qualification Program Self-Assessment Report - Livermore Field  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Livermore Livermore Field Office Technical Qualification Program Self-Assessment Report - Livermore Field Office The purpose of the Livermore Field Office (LFO) Teclmical Qualification Program (TQP) is to ensure that federal teclmical personnel with safety oversight responsibilities at defense nuclear facilities at Lawrence Livermore National Laboratory possess competence commensurate with responsibilities. LFO is committed to ensuring it has the necessary teclmical capabilities to provide the kind of management, direction, and guidance essential to safe operation ofDOE's defense nuclear facilities. LFO TQP Self-Assessment, May 2013 More Documents & Publications Technical Qualification Program Self-Assessment Report - Nevada Site Office Technical Qualification Program Self-Assessment Report - Sandia Site Office

240

Workforce Statistics - Livermore Field Office | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Livermore Field Office | National Nuclear Security Livermore Field Office | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Workforce Statistics - Livermore Field Office Home > About Us > Our Operations > Management and Budget > Office of Civil Rights > Workforce Statistics > Workforce Statistics - Livermore Field Office Workforce Statistics - Livermore Field Office

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Sandia National Laboratories: Locations: Livermore, California: Visiting  

NLE Websites -- All DOE Office Websites (Extended Search)

California California Livermore, California administration building Our location and hours of operation Sandia/California is located at 7011 East Avenue in Livermore, Calif., a suburban community about 45 miles east of San Francisco. Positioned at the eastern edge of the San Francisco Bay Area, Sandia is within easy commuting distance of many affordable housing communities in San Joaquin County and the Central Valley. The official hours of operation at Sandia/California are from 7:30 a.m. to 4 p.m. PST, Monday through Friday. General inquiries can be made by calling (925) 294-3000. See our contacts page for additional information. Getting here All three major airports in the San Francisco Bay Area provide access to Sandia/California. Oakland International Airport is the closest airport to

242

The Livermore Phantom History and Supplementation  

Science Conference Proceedings (OSTI)

In vivo monitoring facilities determine the absence or presence of internally entrained radionuclides. To be of greatest utility, the detection systems must detect and quantify the nuclides of interest at levels of interest. Phantoms have been developed to improve measurements at in vivo monitoring facilities. Since the 1970s, the Lawrence Livermore National Laboratory (LLNL, or simply "Livermore") phantom continues to be a well-used tool at lung monitoring facilities, especially for the detection of low-energy emissions from transuranics. The history of its development from need, through design development and current availability, is summarized. The authors have taken the LLNL phantom one step further by scanning the phantom surface and announce the availability of the scan files on the internet.

Snyder, Sandra F.; Traub, Richard J.

2010-03-01T23:59:59.000Z

243

Consent Order, Lawrence Livermore National National Security, LLC -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National National Security, LLC - Lawrence Livermore National National Security, LLC - WCO-2010-01 Consent Order, Lawrence Livermore National National Security, LLC - WCO-2010-01 October 29, 2010 Consent Order issued to Lawrence Livermore National Security, LLC for deficiencies associated with the Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program This letter refers to the Office of Health, Safety and Security, Office of Enforcement investigation into deficiencies associated with the Lawrence Livermore National Laboratory (LLNL) Chronic Beryllium Disease Prevention Program (CBDPP) and related work planning and control processes. The results of the investigation were provided to Lawrence Livermore National Security, LLC (LLNS) in an Investigation Report dated July 7, 2009. An

244

Lawrence Livermore National Laboratory's Use of Time and Materials Subcontracts  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory's Use of Time and Materials Subcontracts OAS-M-13-06 August 2013 Department of Energy Washington, DC 20585 August 8, 2013 MEMORANDUM FOR THE MANAGER, LIVERMORE FIELD OFFICE FROM: George W. Collard Assistant Inspector General for Audits Office of Inspector General SUBJECT: INFORMATION: Audit Report on "Lawrence Livermore National Laboratory's Use of Time and Materials Subcontracts" BACKGROUND The mission of Lawrence Livermore National Laboratory (Livermore) is to strengthen the United States' security through development and application of science and technology to enhance the Nation's defense, reduce the global threat from terrorism and weapons of mass destruction, and respond to scientific issues of national importance. Livermore is operated by Lawrence

245

Welcome to the Livermore Field Office | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Livermore Field Office | National Nuclear Security Livermore Field Office | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog The National Nuclear Security Administration Welcome to the Livermore Field Office Home > Field Offices > Welcome to the Livermore Field Office Welcome to the Livermore Field Office The NNSA Livermore Field Office (LFO) is located at the Lawrence Livermore

246

Geothermal programs at Lawrence Livermore National Laboratory  

DOE Green Energy (OSTI)

Lawrence Livermore National Laboratory has a number of geothermal programs supported through two offices in the Department of Energy: the Office of Renewable Technologies, Geothermal Technologies Division, and the Office of Basic Energy Sciences, Division of Engineering, Mathematics and Geosciences. Within these programs, we are carrying out research in injection monitoring, optical instrumentation for geothermal wells, seismic imaging methods, geophysical and drilling investigations of young volcanic systems in California, and fundamental studies of the rock and mineral properties.

Kasameyer, P.W.; Younker, L.W.

1987-07-10T23:59:59.000Z

247

QCL IA 2009-2012 Proposed Research The QCL IA has several major themes around which our individual research projects are organized.  

E-Print Network (OSTI)

)a 1970 2 015 424 ­ Cemet factory expansion (1972­1973)d ; sugar cane mill (1974); PEMEX oil refinery (1978) 1980 2 369 076 Miguel de la Madrid (1988) PEMEX oil refinery expansion (1981, 1983)e ; PEMEX

Texas at Austin, University of

248

Independent Activity Report, Livermore Site Office - January 2011 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Independent Activity Report, Livermore Site Office - January 2011 Independent Activity Report, Livermore Site Office - January 2011 Independent Activity Report, Livermore Site Office - January 2011 January 2011 Livermore Site Office Facility Representative Program Assessment [ARPT-LSO-2011-001] This activity report documents the results of the Office of Health, Safety and Security's (HSS) review of and participation in the Livermore Site Office Self-Assessment of the Facility Representative (FR) Program. This self-assessment was led by the U.S. Department of Energy (DOE) Livermore Site Office (LSO) and conducted by LSO staff, HSS staff, National Nuclear Security Administration (NNSA) Office of the Chief of Defense Nuclear Safety (CDNS) staff, a peer from Los Alamos Site Office, and a FR subject matter expert from NNSA.

249

Independent Activity Report, Lawrence Livermore National Laboratory - March  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Activity Report, Lawrence Livermore National Laboratory Activity Report, Lawrence Livermore National Laboratory - March 2011 Independent Activity Report, Lawrence Livermore National Laboratory - March 2011 March 2011 Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program Effectiveness Review [HIAR-LLNL-2011-03-25] The Lawrence Livermore National Laboratory (LLNL) and the Livermore Site Office (LSO) chartered a team to conduct an effectiveness review of the issues identified with the LLNL Chronic Beryllium Disease Prevention Program (CBDPP). The team included members and observers from LLNL, LSO, the National Nuclear Security Administration (NNSA), and the Office of Health, Safety and Security (HSS). The team's final report documents the results of the effectiveness review and the actions taken by LLNL to resolve and prevent recurrence of 44

250

Livermore Field Office Public Affairs | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Livermore Field Office Public Affairs | National Nuclear Security Livermore Field Office Public Affairs | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Livermore Field Office Public Affairs Home > Field Offices > Welcome to the Livermore Field Office > Livermore Field Office Public Affairs Livermore Field Office Public Affairs The LFO Office of Public Affairs is the primary point of contact between

251

Independent Oversight Review, Lawrence Livermore National Laboratory - July  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Lawrence Livermore National Laboratory - July 2013 Independent Oversight Review, Lawrence Livermore National Laboratory - July 2013 July 2013 Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory The Office of Enforcement and Oversight (Independent Oversight), within the Office of Health, Safety and Security (HSS), conducted an independent review of the National Nuclear Security Administration (NNSA) Livermore Field Office (LFO) and Lawrence Livermore National Laboratory (LLNL) Site 200 preparedness for severe natural phenomena events (NPEs). The HSS Office of Safety and Emergency Management Evaluations performed this review to evaluate the processes for identifying emergency response capabilities and maintaining them in a state of readiness in case of a severe NPE. This

252

Enforcement Letter, Lawrence Livermore National Security LLC, - May 15,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Security LLC, - May Security LLC, - May 15, 2008 Enforcement Letter, Lawrence Livermore National Security LLC, - May 15, 2008 May 15, 2008 Enforcement Letter issued to Lawrence Livermore National Security, LLC related to the Protection of Classified Information at the Lawrence Livermore National Laboratory In our recent dialogue via televideo with your Deputy, safeguards and security director, and other key managers of your staff, we discussed our reasons for sending this enforcement letter to Lawrence Livermore National Security, LLC; the purpose of this letter; and our concerns about the protection of classified information at the Lawrence Livermore National Laboratory (LLNL). Accordingly, this is not a formal enforcement action and imposes no requirements. Enforcement Letter, Lawrence Livermore National Security LLC- May 15, 2008

253

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0-12 0-12 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 September 27, 2000 Preliminary Notice of Violation issued to the University of California related to Authorization Basis Issues at the Lawrence Livermore National Laboratory, (EA-2000-12) This letter refers to the Department of Energy's (DOE) investigation of the facts and circumstances concerning Lawrence Livermore National Laboratory (LLNL) maintenance and adherence to documents, which form the Authorization Basis (AB) for the Laboratory's nuclear facilities. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2000-12 More Documents & Publications Enforcement Letter, Lawrence Livermore National Laboratory - November 5, 1999 Enforcement Letter, Lawrence Livermore National Laboratory - August 22,

254

Site Visit Report, Lawrence Livermore National Laboratory - February 2011 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Lawrence Livermore National Laboratory - Site Visit Report, Lawrence Livermore National Laboratory - February 2011 Site Visit Report, Lawrence Livermore National Laboratory - February 2011 February 2011 Lawrence Livermore National Laboratory Safety Basis Assessment This site visit report documents the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. This combined assessment was sponsored by the National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) and conducted jointly by staff from the Office of Health, Safety and Security (HSS) and LSO. The review was conducted in late 2010 and included

255

Site Visit Report, Lawrence Livermore National Laboratory - March 2010 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Lawrence Livermore National Laboratory - March Site Visit Report, Lawrence Livermore National Laboratory - March 2010 Site Visit Report, Lawrence Livermore National Laboratory - March 2010 March 2010 Review of the Lawrence Livermore National Laboratory Identified Defective Department of Transportation Hazardous Material Packages This review of the Lawrence Livermore National Laboratory (LLNL) identification, immediate actions, communications, documentation, evaluation, reporting and follow-up to the discovery of defective Department of Transportation (DOT) UN1A2 55- and 30-gallon open head single bolt closure steel drums intended for storage and transportation of hazardous waste and materials, conducted on January 26-29, 2010, was sponsored by the DOE Livermore Site Office (LSO) to support interface with

256

Site Visit Report, Lawrence Livermore National Laboratory - May 2010 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Lawrence Livermore National Laboratory - May Site Visit Report, Lawrence Livermore National Laboratory - May 2010 Site Visit Report, Lawrence Livermore National Laboratory - May 2010 May 2010 Review of Lawrence Livermore National Laboratory Fire Protection Design Review Process This review of the Lawrence Livermore National Laboratory (LLNL) Fire Protection Design Review Process, conducted on March 24 through April 2, 2010, was sponsored by the U.S. Department of Energy (DOE) Livermore Site Office (LSO) and conducted jointly with LSO staff. Overall, the design review process was observed to be effective and the LLNL programs for performing these reviews were being implemented. Many aspects of the process are effective, and the personnel who implement it are knowledgeable and experienced. This review identified only one

257

Lawrence Livermore National Laboratory: Site Map  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Map Site Map About LLNL What we do How we do it Our Values Organization Management and Sponsors Publications History Organizations Global Security National Ignition Facility Operations Safety & Security Science & Technology Weapons & Complex Integration Visiting LLNL Maps & Directions Badging Discovery Center Site Tours Current Weather Protocol Office Where to stay Tri-Valley Visitors Bureau City of Livermore News News Center For Reporters Social Media & Multimedia Publication Science and Technology Review Lab Report News Releases Around the Lab Community Discovery Center Site Tours Community giving Corporate giving Environmental information Community Center Contacts Discover LLNL Newsletter Volunteer Opportunities Education Internships Postdocs K - 12 Outreach Site Tours School Tours

258

Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

June June 2, 2005 Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 June 2, 2005 Enforcement Letter Issued to Lawrence Livermore National Laboratory for Quality Assurance Deficiencies related to Weapon Activities, June 2, 2005 This letter is to inform you of the Department of Energy's (DOE) concern regarding several quality assurance-related deficiencies involving actions by Lawrence Livermore National Laboratory (LLNL) personnel. These deficiencies were associated with a cracked explosive event that occurred at the Pantex site in January 2004. The timing of this letter is intended to coincide with a DOE enforcement action stemming from this event. Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 More Documents & Publications

259

Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

June June 2, 2005 Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 June 2, 2005 Enforcement Letter Issued to Lawrence Livermore National Laboratory for Quality Assurance Deficiencies related to Weapon Activities, June 2, 2005 This letter is to inform you of the Department of Energy's (DOE) concern regarding several quality assurance-related deficiencies involving actions by Lawrence Livermore National Laboratory (LLNL) personnel. These deficiencies were associated with a cracked explosive event that occurred at the Pantex site in January 2004. The timing of this letter is intended to coincide with a DOE enforcement action stemming from this event. Enforcement Letter, Lawrence Livermore National Laboratory - June 2, 2005 More Documents & Publications

260

Review of the Lawrence Livermore National Laboratory Health Services...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Health Administration SQUIRM Super Quality Improvement and Risk Management 1 OFFICE OF OVERSIGHT REVIEW OF THE LAWRENCE LIVERMORE NATIONAL LABORATORIES HEALTH SERVICES...

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

FY 2010 Lawrence Livermore National Security, LLC, PER Summary...  

National Nuclear Security Administration (NNSA)

Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2010 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project...

262

FY 2011 Lawrence Livermore National Security, LLC, PER Summary...  

National Nuclear Security Administration (NNSA)

Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2011 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project...

263

FY 2008 Lawrence Livermore National Security, LLC, PER Summary...  

National Nuclear Security Administration (NNSA)

Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2008 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project...

264

FY 2009 Lawrence Livermore National Security, LLC, PER Summary...  

National Nuclear Security Administration (NNSA)

Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2009 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project...

265

Livermore and Russian scientists propose new names for elements...  

NLE Websites -- All DOE Office Websites (Extended Search)

was named after Flerov - Flerov Laboratory of Nuclear Reactions (FLNR). Livermorium (atomic symbol Lv) was chosen to honor Lawrence Livermore National Laboratory (LLNL) and...

266

Lawrence Livermore teams with industry to advance energy technologies...  

NLE Websites -- All DOE Office Websites (Extended Search)

release: 03192012 | NR-12-03-01 Lawrence Livermore teams with industry to advance energy technologies using high performance computing Donald B Johnston , LLNL, (925)...

267

Independent Oversight Review of the Lawrence Livermore National...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

- March 2001 March 2001 Review of the Lawrence Livermore National Laboratory Health Services Department The Office of Environment, Safety, and Health (ES&H) Oversight...

268

Lawrence Livermore National Laboratory Operational Drill at the...  

NLE Websites -- All DOE Office Websites (Extended Search)

HSS Independent Activity Report - Rev. 0 Report Number: HIAR LLNL-2013-02-27 Site: Lawrence Livermore National Laboratory (LLNL) Subject: Office of Enforcement and Oversight's...

269

Lawrence Livermore National Laboratory Site Lead Planning Activities...  

NLE Websites -- All DOE Office Websites (Extended Search)

Report Number: HIAR LLNL-2012-10-23 Site: Lawrence Livermore National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management...

270

Lawrence Livermore research highlighted at AAAS annual meeting  

NLE Websites -- All DOE Office Websites (Extended Search)

Lawrence Livermore research highlighted at AAAS annual meeting Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov Printer-friendly Mike Dunne, Debbie Callahan and...

271

Site Visit Report, Lawrence Livermore National Laboratory - February...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions....

272

Lawrence Livermore increases contracts awarded to small businesses...  

NLE Websites -- All DOE Office Websites (Extended Search)

standing in front of the NIF diagnostics that she works on. Photos by Julie KorhummelLLNL Lawrence Livermore increases contracts awarded to small businesses for third straight...

273

Lawrence Livermore National Laboratory 2007 Annual Report  

SciTech Connect

Lawrence Livermore National Laboratory's many outstanding accomplishments in 2007 are a tribute to a dedicated staff, which is shaping the Laboratory's future as we go through a period of transition and transformation. The achievements highlighted in this annual report illustrate our focus on the important problems that affect our nation's security and global stability, our application of breakthrough science and technology to tackle those problems, and our commitment to safe, secure, and efficient operations. In May 2007, the Department of Energy (DOE) awarded Lawrence Livermore National Security, LLC (LLNS), a new public-private partnership, the contract to manage and operate the Laboratory starting in October. Since its inception in 1952, the Laboratory had been managed by the University of California (UC) for the DOE's National Nuclear Security Administration (NNSA) and predecessor organizations. UC is one of the parent organizations that make up LLNS, and UC's presence in the new management entity will help us carry forward our strong tradition of multidisciplinary science and technology. 'Team science' applied to big problems was pioneered by the Laboratory's co-founder and namesake, Ernest O. Lawrence, and has been our hallmark ever since. Transition began fully a year before DOE's announcement. More than 1,600 activities had to be carried out to transition the Laboratory from management by a not-for-profit to a private entity. People, property, and procedures as well as contracts, formal agreements, and liabilities had to be transferred to LLNS. The pre-transition and transition teams did a superb job, and I thank them for their hard work. Transformation is an ongoing process at Livermore. We continually reinvent ourselves as we seek breakthroughs that impact emerging national needs. An example is our development in the late 1990s of a portable instrument that could rapidly detect DNA signatures, research that started with a view toward the potential threat of terrorist use of biological weapons. As featured in our annual report, activities in this area have grown to many important projects contributing to homeland security and disease prevention and control. At times transformation happens in large steps. Such was the case when nuclear testing stopped in the early 1990s. As one of the nation's nuclear weapon design laboratories, Livermore embarked on the Stockpile Stewardship Program. The objectives are to ensure the safety, security, and reliability of the nation's nuclear weapons stockpile and to develop a science-based, thorough understanding of the performance of nuclear weapons. The ultimate goal is to sustain confidence in an aging stockpile without nuclear testing. Now is another time of major change for the Laboratory as the nation is resizing its nuclear deterrent and NNSA begins taking steps to transform the nuclear weapons complex to meet 21st-century national security needs. As you will notice in the opening commentary to each section of this report, the Laboratory's senior management team is a mixture of new and familiar faces. LLNS drew the best talent from its parent organizations--Bechtel National, UC, Babcock & Wilcox, the Washington Group Division of URS, and Battelle--to lead the Laboratory. We are honored to take on the responsibility and see a future with great opportunities for Livermore to apply its exceptional science and technology to important national problems. We will work with NNSA to build on the successful Stockpile Stewardship Program and transform the nation's nuclear weapons complex to become smaller, safer, more secure, and more cost effective. Our annual report highlights progress in many relevant areas. Laboratory scientists are using astonishing computational capabilities--including BlueGene/L, the world's fastest supercomputer with a revolutionary architecture and over 200,000 processors--to gain key insights about performance of aging nuclear weapons. What we learn will help us sustain the stockpile without nuclear testing. Preparations are underway to start experiments at

Chrzanowski, P; Walter, K

2008-04-25T23:59:59.000Z

274

Lawrence Livermore National Laboratory Environmental Report 2010  

SciTech Connect

The purposes of the Lawrence Livermore National Laboratory Environmental Report 2010 are to record Lawrence Livermore National Laboratory's (LLNL's) compliance with environmental standards and requirements, describe LLNL's environmental protection and remediation programs, and present the results of environmental monitoring at the two LLNL sites - the Livermore site and Site 300. The report is prepared for the U.S. Department of Energy (DOE) by LLNL's Environmental Protection Department. Submittal of the report satisfies requirements under DOE Order 231.1A, Environmental Safety and Health Reporting, and DOE Order 5400.5, Radiation Protection of the Public and Environment. The report is distributed electronically and is available at https://saer.llnl.gov/, the website for the LLNL annual environmental report. Previous LLNL annual environmental reports beginning in 1994 are also on the website. Some references in the electronic report text are underlined, which indicates that they are clickable links. Clicking on one of these links will open the related document, data workbook, or website that it refers to. The report begins with an executive summary, which provides the purpose of the report and an overview of LLNL's compliance and monitoring results. The first three chapters provide background information: Chapter 1 is an overview of the location, meteorology, and hydrogeology of the two LLNL sites; Chapter 2 is a summary of LLNL's compliance with environmental regulations; and Chapter 3 is a description of LLNL's environmental programs with an emphasis on the Environmental Management System including pollution prevention. The majority of the report covers LLNL's environmental monitoring programs and monitoring data for 2010: effluent and ambient air (Chapter 4); waters, including wastewater, storm water runoff, surface water, rain, and groundwater (Chapter 5); and terrestrial, including soil, sediment, vegetation, foodstuff, ambient radiation, and special status wildlife and plants (Chapter 6). Complete monitoring data, which are summarized in the body of the report, are provided in Appendix A. The remaining three chapters discuss the radiological impact on the public from LLNL operations (Chapter 7), LLNL's groundwater remediation program (Chapter 8), and quality assurance for the environmental monitoring programs (Chapter 9). The report uses System International units, consistent with the federal Metric Conversion Act of 1975 and Executive Order 12770, Metric Usage in Federal Government Programs (1991). For ease of comparison to environmental reports issued prior to 1991, dose values and many radiological measurements are given in both metric and U.S. customary units. A conversion table is provided in the glossary.

Jones, H E; Bertoldo, N A; Campbell, C G; Cerruti, S J; Coty, J D; Dibley, V R; Doman, J L; Grayson, A R; MacQueen, D H; Wegrecki, A M; Armstrong, D H; Brigdon, S L; Heidecker, K R; Hollister, R K; Khan, H N; Lee, G S; Nelson, J C; Paterson, L E; Salvo, V J; Schwartz, W W; Terusaki, S H; Wilson, K R; Woods, J M; Yimbo, P O; Gallegos, G M; Terrill, A A; Revelli, M A; Rosene, C A; Blake, R G; Woollett, J S; Kumamoto, G

2011-09-14T23:59:59.000Z

275

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1 1 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-01 March 9, 1998 Preliminary Notice of Violation issued to University of California related to the Unplanned Personnel Contaminations and Radioactive Material Intakes at the Hazardous Waste Management Facilities at the Lawrence Livermore National Laboratory, (EA-98-01) This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances surrounding the unplanned personnel contaminations/intakes at [a building] of Lawrence Livermore National Laboratory's (LLNL) Hazardous Waste Management Facilities on July 2, 1997. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-01 More Documents & Publications Preliminary Notice of Violation, Lawrence Livermore National Laboratory -

276

Technical Qualification Program Self-Assessment Report - Livermore Field  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Technical Qualification Program Self-Assessment Report - Livermore Technical Qualification Program Self-Assessment Report - Livermore Field Office Technical Qualification Program Self-Assessment Report - Livermore Field Office The purpose of the Livermore Field Office (LFO) Teclmical Qualification Program (TQP) is to ensure that federal teclmical personnel with safety oversight responsibilities at defense nuclear facilities at Lawrence Livermore National Laboratory possess competence commensurate with responsibilities. LFO is committed to ensuring it has the necessary teclmical capabilities to provide the kind of management, direction, and guidance essential to safe operation ofDOE's defense nuclear facilities. LFO TQP Self-Assessment, May 2013 More Documents & Publications Technical Qualification Program Self-Assessment Report - Pacific Northwest

277

Lawrence Livermore to build advanced laser system in Czech Republic  

NLE Websites -- All DOE Office Websites (Extended Search)

9-06 9-06 For immediate release: 09/17/2013 | NR-13-09-06 High Resolution Image The High Repetition-Rate Advanced Petawatt Laser System, or HAPLS, will be designed, developed, assembled and tested at Lawrence Livermore. It will be transferred to the ELI Beamlines facility in 2016, where it will be commissioned for use by the international scientific community. Lawrence Livermore to build advanced laser system in Czech Republic Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov High Resolution Image Artist renderings of the ELI Beamlines facility, currently under construction in the Czech Republic. High Resolution Image A CAD image of the ELI-HAPLS laser. LIVERMORE, Calif. - Lawrence Livermore National Laboratory (LLNL), through Lawrence Livermore National Security LLC (LLNS), has been awarded more than

278

Site Visit Report, Livermore Site Office - February 2011 | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Livermore Site Office - February 2011 Site Visit Report, Livermore Site Office - February 2011 Site Visit Report, Livermore Site Office - February 2011 February 2011 Livermore Site Office Safety Basis Self-Assessment This site visit report documents the collective results of the Office of Health, Safety and Security's (HSS) assessment of National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. The assessment was sponsored by LSO as a self-assessment and conducted jointly by HSS and LSO staff. It was completed in late 2010 and included site visits from November 29 - December

279

Independent Oversight Review of the Lawrence Livermore National Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Review of the Lawrence Livermore National Review of the Lawrence Livermore National Laboratory - March 2001 Independent Oversight Review of the Lawrence Livermore National Laboratory - March 2001 March 2001 Review of the Lawrence Livermore National Laboratory Health Services Department The Office of Environment, Safety, and Health (ES&H) Oversight (EH-2) in conjunction with the Accreditation Association of Ambulatory Health Care (AAAHC) reviewed the Lawrence Livermore National Laboratory (LLNL) Health Services Department on March 19-21, 2001. The purpose of the review was twofold. First, EH-2 performed a review of selected activities to identify positive attributes, issues, and opportunities for improvement. Second, the AAAHC surveyed the medical program for accreditation. This report documents

280

Lawrence Livermore National Laboratory: Social Media  

NLE Websites -- All DOE Office Websites (Extended Search)

Social Media Social Media By staying on the cutting edge of Web communication, the News Center at LLNL reaches out to the media and the public through a variety of social media and multimedia Websites: Flickr An image- and video-hosting Website. Visit now and view the LLNL photostream in a variety of formats. Twitter A microblogging service. Sign up today and get short, tiimely messages about the Livermore Lab. Facebook A social-networking Website with more than 500 million active users. Enlist now to become a "friend" of LLNL. RSS A Web-feed service that sends content to subscribers automatically. Enroll at once to get the latest LLNL headlines. Utube A video-sharing Website. Navigate here to immediately watch the latest in cutting-edge science and technology at the Laboratory.

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Lawrence Livermore National Laboratory: News Center Distribution  

NLE Websites -- All DOE Office Websites (Extended Search)

News > News > News Center > Receive News Releases Receive News Releases Journalists: To receive information about activities at Lawrence Livermore National Laboratory, please complete the form below. The form may also be used to submit changes in your contact information or to remove yourself from the list. If you have any questions, please contact Media Relations at (925) 422-4599 or send an e-mail message to Kirsten Sprott. Type of Request: New Addition to News Media List Change Information Delete Information Your Name Title E-Mail Address Preferred E-Mail Address Direct Business Phone Number (with area code) Business Fax Number (with area code) News Organization Street Address City State Country Zip Code f815eee8931dfda40651bfb5302ac9a7 1389471929 Type of News Services You Use:

282

Livermore Regional Air Quality model (LIRAQ-1)  

SciTech Connect

The Livermore Regional Air Quality (LIRAQ) model is an Eulerian grid model developed for use in assessing the regional air quality of a region with temporally and spatially varying meteorology in complex terrain. The first implementation of this approach is embodied in the LIRAQ-1 model and is intended for use with either simple chemical systems or relatively inert pollutants. The basic model formulation is based on the conservation of mass equation integrated vertically from the surface to the base of an inversion layer, thereby creating a single layer model with a grid structure established in the two horizontal dimensions. Surface pollutant concentrations are related to vertical average concentrations using a logarithmic profile. Atmospheric transport, inversion height, source emissions, and topography are all prescribed. Data for the San Francisco Bay Area obtained during 1973 have been used in validation studies. (auth)

MacCracken, M.C.; Grant, K.E.

1975-10-01T23:59:59.000Z

283

Dr. Yuan Ping Lawrence Livermore National Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

Creating, diagnosing and Creating, diagnosing and controlling high-energy- density matter with lasers Dr. Yuan Ping Lawrence Livermore National Lab Tuesday, Oct 22, 2013 - 3:00PM MBG AUDITORIUM Refreshments at 2:45PM The PrinceTon Plasma Physics laboraTory is a U.s. DeParTmenT of energy faciliTy Since their invention in 1960's, lasers with power spanning from Kilo- Watt to PetaWatt have been widely used in almost every branch of sci- ence, leading to numerous discoveries and novel techniques. At present, lasers are capable of creating extreme states of matter in a laboratory, at conditions resembling those most extreme in the Universe: they heat matter up to the temperatures inside stars, they create electric field and

284

J.G. Tobin and S.-W. Yu Lawrence Livermore National Laboratory, Livermore, CA, USA  

National Nuclear Security Administration (NNSA)

Differentiation of 5f and 6d Components Differentiation of 5f and 6d Components in the Unoccupied Electronic Structure of UO 2 J.G. Tobin and S.-W. Yu Lawrence Livermore National Laboratory, Livermore, CA, USA Summary: One of the crucial questions of all actinide electronic structure determinations is the issue of 5f versus 6d character and the distribution of these components across the density of states. Here, two break-though experiments will be discussed, which have allowed the direct determination of the U5f and U6d contributions to the unoccupied density of states (UDOS) in Uranium Dioxide (UO 2 ). [1] First, a combined soft X-ray Absorption and Bremstrahlung Isochromat Spectroscopy (XAS and BIS, respectively) study of UO 2 will be discussed. [2] Second, a novel Resonant Inverse Photoelectron and X-ray Emission Spectroscopy (RIPES and

285

FY 2012 Lawrence Livermore National Security, LLC, PEP | National Nuclear  

National Nuclear Security Administration (NNSA)

PEP | National Nuclear PEP | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2012 Lawrence Livermore National Security, LLC, PEP Home > About Us > Our Operations > Acquisition and Project Management > Performance Evaluations > FY 2012 Lawrence Livermore National Security, LLC, PEP FY 2012 Lawrence Livermore National Security, LLC, PEP

286

Enforcement Letter, Lawrence Livermore National Laboratory - November 5,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 5, 1999 Enforcement Letter, Lawrence Livermore National Laboratory - November 5, 1999 November 5, 1999 Issued to Lawrence Livermore National Laboratory related to Authorization Basis Issues This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances concerning issues related to the maintenance and adherence to documents which form the authorization basis for Lawrence Livermore National Laboratory (LLNL) operated nuclear facilities. Specifically, three Noncompliance Tracking System (NTS) reports were submitted over a four-day period and are summarized below: On July 30, 1999, it was reported that two cabinets contained about [specified amount] of [ ] solvents in violation of the building Safety Analysis Documentation;

287

Enforcement Letter, Lawrence Livermore National Laboratory - November 5,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 5, 1999 Enforcement Letter, Lawrence Livermore National Laboratory - November 5, 1999 November 5, 1999 Issued to Lawrence Livermore National Laboratory related to Authorization Basis Issues This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances concerning issues related to the maintenance and adherence to documents which form the authorization basis for Lawrence Livermore National Laboratory (LLNL) operated nuclear facilities. Specifically, three Noncompliance Tracking System (NTS) reports were submitted over a four-day period and are summarized below: On July 30, 1999, it was reported that two cabinets contained about [specified amount] of [ ] solvents in violation of the building Safety Analysis Documentation;

288

Enforcement Letter, Lawrence Livermore National Laboratory - August 22,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

August August 22, 1996 Enforcement Letter, Lawrence Livermore National Laboratory - August 22, 1996 August 22, 1996 Issued to the University of California related to Radiological Worker Training Deficiencies at the Lawrence Livermore National Laboratory This letter refers to the Department of Energy's (DOE) evaluation of Lawrence Livermore National Laboratory's (LLNL) report of a potential noncompliance with the requirements of 10 CFR 835 (Occupational Radiation Protection). This potential noncompliance involved the failure to complete required radiological worker retraining for 49 percent of LLNL's approximately 700 radiological workers. The training issue was initially identified on May 6, 1996, by LLNL during a routine review of the Chemistry and Materials Science deficiency

289

Director of the National Ignition Facility, Lawrence Livermore National  

NLE Websites -- All DOE Office Websites (Extended Search)

Director of the National Ignition Facility, Lawrence Livermore National Director of the National Ignition Facility, Lawrence Livermore National Laboratory | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Who We Are > In The Spotlight > Edward Moses Director of the National Ignition Facility, Lawrence Livermore National Laboratory

290

Retired lab physicist and computational pioneer, Lawrence Livermore  

National Nuclear Security Administration (NNSA)

Retired lab physicist and computational pioneer, Lawrence Livermore Retired lab physicist and computational pioneer, Lawrence Livermore National Laboratory | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Who We Are > In The Spotlight > Berni Alder Retired lab physicist and computational pioneer, Lawrence Livermore National Laboratory

291

Associate director for Physical and Life Sciences, Lawrence Livermore  

National Nuclear Security Administration (NNSA)

Associate director for Physical and Life Sciences, Lawrence Livermore Associate director for Physical and Life Sciences, Lawrence Livermore National Laboratory | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > About Us > Who We Are > In The Spotlight > William Goldstein Associate director for Physical and Life Sciences, Lawrence Livermore

292

Sensitivity analysis of world oil prices. Analysis report AR/IA/79-47  

SciTech Connect

An analysis of the impact of the political disruption in Iran on the world oil market is presented. During the first quarter of 1979, this disruption caused a loss of approximately 5 million barrels per day (MMBD) of oil production available for export from Iran to the rest of the world. This loss of production and the political climate in Iran have caused much speculation concerning future Iranian oil production and total Organization of Petroleum Exporting Countries (OPEC) oil production in the nearterm and midterm. The analysis describes these issues in terms of two critical factors: the world oil price and the level of OPEC oil production in the nearterm and midterm. A detailed comparison of the Central Intelligence Agency (CIA) and Energy Information Agency (EIA) forecasting models of world oil prices is presented. This comparison consists of examining reasons for differences in the price forecasts of the CIA model by using CIA assumptions within the EIA model. The CIA and EIA model structures and major parameters are also compared. It is important to note that this analysis is not all encompassing. In particular, the analysis does not provide data on crude oil prices in the spot market, but does provide information on the average crude oil price; and does not permit rationing of oil, since the market is forced to clear only through changes in oil prices. Throughout this paper, world oil prices are defined in terms of real 1978 dollars per barrel of crude oil delivered to the East Coast of the United States net of any import fees.

Rodekohr, M.; Cato, D.

1979-09-01T23:59:59.000Z

293

The A2iA Arabic Handwritten Text Recognition System at the ...  

Science Conference Proceedings (OSTI)

... This two- step training schedule greatly helped to reduce convergence times ... This pro- cedure requires the construction of a decoding graph that ...

2013-08-19T23:59:59.000Z

294

Quantitative comparison between Type Ia supernova spectra at low and high redshifts: A case study  

E-Print Network (OSTI)

Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space

Garavini, G.; Supernova Cosmology Project

2008-01-01T23:59:59.000Z

295

Improving Type Ia Supernova Standard Candle Cosmology Measurements Using Observations of Early-Type Host Galaxies  

E-Print Network (OSTI)

Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space

Meyers, Joshua Evan

2012-01-01T23:59:59.000Z

296

SUSTAINABILITY EXCELLENTIA CoLumbIA ENgINEErINg130  

E-Print Network (OSTI)

. Journal of "Solar Energy Materials and Solar Cells". Proceedings of IEEE Photovoltaic Specialist Conferences. Proceedings of European Photovoltaic Solar Energy Conferences. #12;Module 2/Photovoltaics, Wiley, 1995. R.H.Bube, Photovoltaic Materials, Imperial College Press, 1998. Journal of "Solar Energy

297

_ _i_i Association for ,nformation and Image Management i; _ J , IA Spring, Maryland 20310  

E-Print Network (OSTI)

the maximum pressure needed to lift the overburden (``the fracture pressure''), and new CO2 injection wells (MMscf) of natural gas burned to generate elec- tricity (n3045us2a.xls). All these data are posted generation has been calculated from the DOE EIA files epmxlfile4_1.xls (Report DOE/EIA-0226) for coal, and n

Hazen, Terry

298

Prospects for Type Ia Supernova explosion mechanism identification with gamma rays  

E-Print Network (OSTI)

The explosion mechanism associated with thermonuclear supernovae (SNIa) is still a matter of debate. There is a wide agreement that high amounts of of radioactive nuclei are produced during these events and they are expected to be strong gamma-ray emitters. In the past, several authors have investigated the use of this gamma-ray emission as a diagnostic tool. In this paper we have done a complete study of the gamma-ray spectra associated with all the different scenarios currently proposed. This includes detonation, delayed detonation, deflagration and the off-center detonation. We have performed accurate simulations for this complete set of models in order to determine the most promising spectral features that could be used to discriminate among the different models. Our study is not limited to qualitative arguments. Instead, we have quantified the differences among the spectra and established distance limits for their detection. The calculations have been performed considering the best current response estim...

Gmez-Gomar, J; Jean, P; Gomez-Gomar, Jordi; Isern, Jordi; Jean, Pierre

1997-01-01T23:59:59.000Z

299

OS and compiler considerations in the design of the IA-64 architecture  

Science Conference Proceedings (OSTI)

Increasing demands for processor performance have outstripped the pace of process and frequency improvements, pushing designers to find ways of increasing the amount of work that can be processed in parallel. Traditional RISC architectures use hardware ...

Rumi Zahir; Jonathan Ross; Dale Morris; Drew Hess

2000-12-01T23:59:59.000Z

300

Pacific Northwest National Laboratory: INstItute for INterfacIaL cataLysIs  

E-Print Network (OSTI)

shell (biomass) cellulosa type of reaction flash pyrolysis pyrolysis flash pyrolysis slow pyrolysis. Scott, J. Piskorz, D. Radlein; Liquid Products from the Continuous Flash Pyrolysis of Biomass, Ind. Eng; The Continous Flash Pyrolysis of Biomass, The Canadian Journal of Chemical Engineering, 1984, 62, 404-412 #12

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Regional Initiative in Science and Education www.ias.edu/rise  

E-Print Network (OSTI)

funds. He has an ally in Heneri Dzinotyiweyi, the Minister for Science and Technology Development as a regional research facility and as the coordinating hub of a regional network. The 60 computer users ­ staff

302

SUSTAINABILITY EXCELLENTIA CoLumbIA ENgINEErINg102  

E-Print Network (OSTI)

when carbon dioxide is introduced into thermal conversion processes such as the gasification of coal to syngas, leaving behind only a carbonless char. Castaldi estimates that if the biomass were used

303

Pacific Northwest National Laboratory: INstItute for INterfacIaL cataLysIs  

E-Print Network (OSTI)

of Chemistry University of Calgary,Alberta, Canada T2N 1N4 New Orleans National Meeting Modeling the Fischer-Tropsch study Fischer-Tropsch synthesis: An Introduction First discovered by Sabatier and Sanderens in 1902: CO + H2 CH4 Ni,Fe,Co Fischer and Tropsch reported in 1923 the synthesis of liquid hydrocarbons with high

304

Targeted Energy Efficiency Expert Evaluation Report: Neal Smith Federal Building, Des Moines, IA  

SciTech Connect

This report summarizes the energy efficiency measures identified and implemented, and an analysis of the energy savings realized using low-cost/no-cost control system measures identified.

Fernandez, Nicholas; Goddard, James K.; Underhill, Ronald M.; Gowri, Krishnan

2013-03-01T23:59:59.000Z

305

SUSTAINABILITY EXCELLENTIA CoLumbIA ENgINEErINg 141  

E-Print Network (OSTI)

- onry is also crucial to their safe storage. Plutonium, an active ingredient in nuclear weap- ons, has to determine how the electrons within these materials will behave. "The plutonium in the weapons ages, and we have to be able to predict the proper- ties of plutonium under a variety of conditions," Chris

306

From Convection to Explosion: End-to-End Simulation of Type Ia Supernovae  

E-Print Network (OSTI)

INCITE award at the Oak Ridge Leadership Computational Facility (OLCF) at Oak Ridge National Laboratory

Bell, John B.

307

Teor'ia de Grupos y Mec'anica Qu'antica Luis A. Seco  

E-Print Network (OSTI)

armonicos desacoplados. 7. El ' atomo de hidr'ogeno. 8. El helio y los otros 'atomos. 9. Mol'eculas. 10

Seco, Luis A.

308

INFORMATION EXCELLENTIA CoLumbIA ENgINEErINg238  

E-Print Network (OSTI)

that bends and twists. "Computers, geometry, and physics are my ingredients. I mix them up in a bowl and what science as well. B.A.Sc., University of Toronto (Canada), 1997; M.S., California Institute of TechnologySPUn Associate Professor of Computer Science #12;

Hone, James

309

Targeted Eneregy Efficiency Expert Evaluation Report: Neal Smith Federal Building, Des Moines, IA  

SciTech Connect

This report summarizes the energy efficiency measures identified and implemented, and an analysis of the energy savings realized using low-cost/no-cost control system measures identified.

Fernandez, Nicholas; Goddard, James K.; Underhill, Ronald M.; Gowri, Krishnan

2013-03-01T23:59:59.000Z

310

REPORT OF THE PRESIDENT,~ -01 OF THE UNIVERSITY OF BRITISH COLm~IA~ -  

E-Print Network (OSTI)

38 R~port of the Instructor in Physical Education for Women 39 g~portof the Office!: Co Second Yearoo.....eoQ....oo........... Third Year.....OOO..OO..O.............Fourth Ye~.O..O.O.OIO; Engineer 134; Farmer 75; Inspector 21; Insurance 34; Lawyer 39; Lumberman 33; Manager 54; Merchant 97

Pulfrey, David L.

311

2012 Annual Workforce Analysis and Staffing Plan Report - Livermore  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6.W~~l 6.W~~l #II VA. 'lf,fi:'¥Ylj Nsffonal Nuclear Security Admfnfat111tlon Department of Energy National Nuclear Security Administration Livermore Site Office PO Box 808, L-293 7000 East Avenue Livermore, California 94551-0808 !JAN 18 2013 3250 COR-M0-1/17/2013-490077 MEMORANDUM FOR KAREN L. BOARDMAN CHAIRPERSON FEDERAL TECHNICAL CAPABILITY PANEL FROM: v KIMBERLY DAVIS LEBAK "/'JJ. f /ti/ MANAGER ~ ..--r; tV[ SUBJECT: REFRENCE: Workforce Analysis and Staffing Plan Report for the Livermore Field Office 2012, Revision I Memorandum (K. Boardman/Distribution), Annual Workforce Analysis and Staffing Plan Report for Calendar Year 2012, dated October 24, 2012 Please see the attached revised Workforce Analysis and Staffing Plan Report for the Livermore

312

FY 2009 Lawrence Livermore National Security, LLC, PER Summary | National  

National Nuclear Security Administration (NNSA)

Lawrence Livermore National Security, LLC, PER Summary | National Lawrence Livermore National Security, LLC, PER Summary | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2009 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project Management > Performance Evaluations > FY 2009 Lawrence Livermore National Security,

313

Livermore Site Office Facility Representative Program Self-Assessment  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ARPT-LSO-2011-001 ARPT-LSO-2011-001 Site: Livermore Site Office Subject: Office of Independent Oversight's Office of Environment, Safety and Health Evaluations Activity Report for the Livermore Site Office Facility Representative Program Self-Assessment Dates of Activity 01/24/2011 - 01/28/2011 Report Preparer Robert Freeman Activity Description/Purpose: This activity report documents the results of the Office of Health, Safety and Security's (HSS) review of and participation in the Livermore Site Office Self-Assessment of the Facility Representative (FR) Program. This self-assessment was led by the U.S. Department of Energy (DOE) Livermore Site Office (LSO) and conducted by LSO staff, HSS staff, National Nuclear Security Administration (NNSA) Office of the Chief of Defense Nuclear Safety (CDNS) staff, a peer from Los Alamos Site

314

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3-04 3-04 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 September 3, 2003 Preliminary Notice of Violation issued to the University of California related to an Extremity Radiological Overexposure at the Lawrence Livermore National Laboratory, (EA-2003-04) This letter refers to the recent investigation by the Department of Energy's Office of Price-Anderson Enforcement (OE) of the June 2002 extremity radiological overexposure event. Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-2003-04 More Documents & Publications Preliminary Notice of Violation, University of California - EA-2006-01 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-06 Independent Oversight Inspection of Environment, Safety, and Health

315

Independent Activity Report, Lawrence Livermore National Laboratory - March  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

March 2011 March 2011 Independent Activity Report, Lawrence Livermore National Laboratory - March 2011 March 2011 Lawrence Livermore National Laboratory Chronic Beryllium Disease Prevention Program Effectiveness Review [HIAR-LLNL-2011-03-25] The Lawrence Livermore National Laboratory (LLNL) and the Livermore Site Office (LSO) chartered a team to conduct an effectiveness review of the issues identified with the LLNL Chronic Beryllium Disease Prevention Program (CBDPP). The team included members and observers from LLNL, LSO, the National Nuclear Security Administration (NNSA), and the Office of Health, Safety and Security (HSS). The team's final report documents the results of the effectiveness review and the actions taken by LLNL to resolve and prevent recurrence of 44

316

Four Lawrence Livermore researchers named 2013 APS Fellows  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 For immediate release: 12/23/2013 | NR-13-12-06 Four Lawrence Livermore National Laboratory scientists have been selected as 2013 fellows of the American Physical Society (APS). They include, from left: Charles Cerjan, Ian Thompson, Eric Schwegler and Marilyn Schneider. Four Lawrence Livermore researchers named 2013 APS Fellows Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov LIVERMORE, Calif. - Four Lawrence Livermore National Laboratory scientists have been selected as 2013 fellows of the American Physical Society (APS). Physicist Charles Cerjan was cited by the Division of Atomic, Molecular and Optical Physics for "seminal contributions to time-dependent Schrodinger equation propagation algorithms and their application to particle scattering and intense field dynamics, the development of laser-produced

317

Lawrence Livermore Site Office Manager Joins EM's Senior Leadership Team  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore Site Office Manager Joins EM's Senior Lawrence Livermore Site Office Manager Joins EM's Senior Leadership Team Lawrence Livermore Site Office Manager Joins EM's Senior Leadership Team November 9, 2011 - 12:00pm Addthis WASHINGTON, D.C. - EM Acting Assistant Secretary Dave Huizenga announced today that Alice Williams, manager of the DOE National Nuclear Security Administration (NNSA) Lawrence Livermore Site Office has joined the EM senior leadership team. "I am very excited to have Alice join EM Principal Deputy Assistant Secretary Tracy Mustin and I as we continue work toward the achievement of the EM vision and the continuing evolution of an EM organization that is focused on delivery of mission success to meet the nation's needs in the 21st century," Huizenga said. In ensuing months, Williams will work closely with Huizenga and Mustin as

318

Cold cases heat up through Lawrence Livermore approach to identifying  

NLE Websites -- All DOE Office Websites (Extended Search)

10-03 10-03 For immediate release: 10/10/2012 | NR-12-10-03 Cold cases heat up through Lawrence Livermore approach to identifying remains Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly Bruce Buchholz loads a sample in the accelerator. High Resolution Image LIVERMORE, Calif. -- In an effort to identify the thousands of John/Jane Doe cold cases in the United States, a Lawrence Livermore National Laboratory researcher and a team of international collaborators have found a multidisciplinary approach to identifying the remains of missing persons. Using "bomb pulse" radiocarbon analysis developed at Lawrence Livermore, combined with recently developed anthropological analysis and forensic DNA techniques, the researchers were able to identify the remains of a missing

319

Boralex Beaver Livermore Falls Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

Livermore Falls Biomass Facility Livermore Falls Biomass Facility Jump to: navigation, search Name Boralex Beaver Livermore Falls Biomass Facility Facility Boralex Beaver Livermore Falls Sector Biomass Location Androscoggin County, Maine Coordinates 44.1912416°, -70.1707037° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.1912416,"lon":-70.1707037,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

320

Lawrence Livermore National Security Enforcement Letter (NEL-2013-03)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Penrose C. Albright Penrose C. Albright Department of Energy Washington, DC 20585 July 22, 2013 President and Laboratory Director Lawrence Livermore National Security, LLC Lawrence Livermore National Laboratory 7000 East Avenue Livermore, California 94550 NEL-2013-03 Dear Dr. Albright: The Office of Health, Safety and Security's Office of Enforcement and Oversight has evaluated the facts and circumstances surrounding programmatic deficiencies identified in the Lawrence Livermore National Security, LLC (LLNS) software quality assurance (SQA) program. LLNS reported these deficiencies on January 16, 2013, in Noncompliance Tracking System (NTS) report NTS--LSO-LLNL-LLNL- 2013-0001, LLNL Software Quality Assurance Program Does Not Meet DOE 0 414.1 D Standards and Procedures Requirements.

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Lawrence Livermore Laboratory PERFORMANCE TEST OF A BLADELESS...  

NLE Websites -- All DOE Office Websites (Extended Search)

Lawrence Livermore Laboratory PERFORMANCE TEST OF A BLADELESS TURBINE FOR GF.OTHF.RMAT. APPLICATIONS R. Steidel and H. Weiss March 24, 1976 I j UCID-17068 This is an informal...

322

Lawrence Livermore charitable campaign raises $3.3 million for...  

National Nuclear Security Administration (NNSA)

Lawrence Livermore raises 3.3 million for local organizations Posted on December 12, 2013 at 3:00 pm ET Printer-friendly version Printer-friendly version Facebook Twitter...

323

Lawrence Livermore engineering team makes breakthrough in solar...  

NLE Websites -- All DOE Office Websites (Extended Search)

Allan Chang and Mihail Bora. Lawrence Livermore engineering team makes breakthrough in solar energy research Kenneth K Ma, LLNL, (925)-423-7602, ma28@llnl.gov High Resolution...

324

Livermore Scientists Team with Russia to Discover Element 118  

NLE Websites -- All DOE Office Websites (Extended Search)

"Synthesis of the isotopes of elements 118 and 116" (Abstract) "Synthesis of the isotopes of elements 118 and 116" (Abstract) Physical Review C, October 9, 2006 Livermore Scientists Team With Russia To Discover Elements 113 and 115 LLNL News Release, February. 2, 2004 "Present at the Creation" Science & Technology Review, January/February 2002 Island of Stability NOVA Science Now, September 2006 Social Media Logos Follow LLNL on YouTube Subscribe to LLNL's RSS feed Follow LLNL on Facebook Follow LLNL on Twitter Follow LLNL on Flickr Contact: Anne M. Stark Phone: (925) 422-9799 E-mail: stark8l@llnl.gov FOR IMMEDIATE RELEASE October 16, 2006 NR-06-10-03 Livermore scientists team with Russia to discover element 118 LIVERMORE, Calif. - Scientists from the Chemistry, Materials and Life Sciences Directorate at Lawrence Livermore National Laboratory, in

325

2010 Annual Planning Summary Livermore Site Office (LSO) | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

to be prepared in the next 24 months, and the planned cost and schedule for each NEPA review identified. 2010 Annual Planning Summary Livermore Site Office (LSO) More Documents...

326

Just What is a Supernova?  

NLE Websites -- All DOE Office Websites (Extended Search)

Matter transfer in a binary system Distances to Type Ia Supernovae Slide 8 Supernova "CAT Scan" Type Ia Supernova lightcurves Type Ia Supernovae and Cosmology Type Ia Supernovae...

327

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Laborat... Laborat... file:///I|/Data%20Migration%20Task/EIS-0157-FEIS-03-1992/05eis0157_f.html[6/27/2011 9:57:50 AM] APPENDIX F ECOLOGY AND BIOLOGICAL ASSESSMENT This appendix contains two major sections. Section F.1 is a discussion of the ecological characteristics at the LLNL Livermore site, LLNL Site 300, and SNL, Livermore (referred to collectively as the study sites); and presents information and data on the flora and fauna in the upland areas (see Appendix G for a detailed analysis of wetlands at the study sites). This section focuses on the biological features of LLNL Site 300 because this 7000-acre site is largely undeveloped and represents the most biologically diverse area under study. In contrast, the LLNL Livermore site and SNL, Livermore are developed areas that provide only marginal wildlife habitat because of the high degree of human activity and the few

328

Joint Outreach Task Group (JOTG) Calendar: September  

NLE Websites -- All DOE Office Websites (Extended Search)

FWP Event K-25 Oak Ridge, TN 6 7 8 9 10 11 12 Local Event X-10 Oak Ridge, TN 13 FWP Event Ames Laboratory Ames, IA 14 15 16 17 JOTG Event, Livermore, CA JOTG Event, Emeryville, CA...

329

Federal Facility Compliance Act: Conceptual Site Treatment Plan for Lawrence Livermore National Laboratory, Livermore, California  

Science Conference Proceedings (OSTI)

The Department of Energy (DOE) is required by section 3021(b) of the Resource Conservation and Recovery Act (RCRA), as amended by the Federal Facility Compliance Act (the Act), to prepare plans describing the development of treatment capacities and technologies for treating mixed waste. The Act requires site treatment plans (STPs or plans) to be developed for each site at which DOE generates or stores mixed waste and submitted to the State or EPA for approval, approval with modification, or disapproval. The Lawrence Livermore National Laboratory (LLNL) Conceptual Site Treatment Plan (CSTP) is the preliminary version of the plan required by the Act and is being provided to California, the US Environmental Protection Agency (EPA), and others for review. A list of the other DOE sites preparing CSTPs is included in Appendix 1.1 of this document. Please note that Appendix 1.1 appears as Appendix A, pages A-1 and A-2 in this document.

Not Available

1993-10-01T23:59:59.000Z

330

Lawrence Livermore and Rensselaer Polytechnic Institute scientists set a  

NLE Websites -- All DOE Office Websites (Extended Search)

6 6 For immediate release: 04/30/2013 | NR-13-04-06 Lawrence Livermore and Rensselaer Polytechnic Institute scientists set a new simulation speed record on the Sequoia supercomputer Donald B Johnston, LLNL, (925) 423-4902, johnston19@llnl.gov Printer-friendly Lawrence Livermore scientists, from left, David Jefferson and Peter Barnes. Photo by Laura Schulz and Meg Epperly/LLNL High Resolution Image Computer scientists at Lawrence Livermore National Laboratory (LLNL) and Rensselaer Polytechnic Institute have set a high performance computing speed record that opens the way to the scientific exploration of complex planetary-scale systems. In a paper to be published in May, the joint team will announce a record-breaking simulation speed of 504 billion events per second on LLNL's

331

Preliminary Notice of Violation, Lawrence Livermore National Laboratory -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6 6 Preliminary Notice of Violation, Lawrence Livermore National Laboratory - EA-98-06 July 28, 1998 Preliminary Notice of Violation issued to the University of California related to Criticality Safety and the Quality Assurance Program at the Lawrence Livermore National Laboratory, July 28, 1998 (EA-98-06) This letter refers to the Department of Energy's (DOE) evaluation of the facts and circumstances surrounding a series of criticality safety infractions occurring between May and December 1997 in [a building] at the Lawrence Livermore National Laboratory (LLNL). [The building] is the central repository used to process and store [radioactive material]. During the period May 20 through July 15, 1997, Certified [Radioactive Material] Handlers violated criticality safety procedures for mass limits and form

332

Lawrence Livermore National Laboratory Site Lead Planning Activities, October 2012  

NLE Websites -- All DOE Office Websites (Extended Search)

Report Number: HIAR LLNL-2012-10-23 Site: Lawrence Livermore National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for Site Lead Planning Activities at the Lawrence Livermore National Laboratory Dates of Activity 10/23/2012 - 10/24/2012 Report Preparer: Robert Freeman Activity Description/Purpose: The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013.

333

California utilities partner with Lawrence Livermore to improve state's  

NLE Websites -- All DOE Office Websites (Extended Search)

2-12-04 2-12-04 For immediate release: 12/20/2012 | NR-12-12-04 California utilities partner with Lawrence Livermore to improve state's energy grid Lynda L Seaver, LLNL, (925) 423-3103, seaver1@llnl.gov Printer-friendly California utilities will use the advanced technologies and expertise of Lawrence Livermore National Laboratory to improve the efficiency, security and safety of the state's utility systems under an agreement approved today by the California Public Utilities Commission (CPUC). The CPUC approved funding of a five-year research and development agreement between Pacific Gas and Electric Company, Southern California Edison Company and San Diego Gas and Electric Company, and Lawrence Livermore (LLNL) that will provide the utilities with access to LLNL technological

334

Lawrence Livermore National Laboratory Site Lead Planning Activities, October 2012  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Report Number: HIAR LLNL-2012-10-23 Site: Lawrence Livermore National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for Site Lead Planning Activities at the Lawrence Livermore National Laboratory Dates of Activity 10/23/2012 - 10/24/2012 Report Preparer: Robert Freeman Activity Description/Purpose: The purpose of this Office of Health, Safety and Security (HSS) Independent Oversight activity was to maintain site operational awareness of key nuclear safety performance areas, monitor ongoing site oversight and planning activities for Lawrence Livermore National Laboratory (LLNL) nuclear facilities, and identify and initiate coordination of future HSS oversight activities at the site, including planned HSS targeted reviews planned for Fiscal Year (FY) 2013.

335

Energy Innovations from Livermore Lab to Power Hawaiian Nonprofit |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Innovations from Livermore Lab to Power Hawaiian Nonprofit Innovations from Livermore Lab to Power Hawaiian Nonprofit Energy Innovations from Livermore Lab to Power Hawaiian Nonprofit February 28, 2011 - 11:31am Addthis Mike Gleason (second from left), president and CEO of The Arc of Hilo. Also shown, from left: Annemarie Meike, Mark Sueksdorf, Marjorie Gonzalez and Larry Ferderber | Photo Courtesy of LLNL Mike Gleason (second from left), president and CEO of The Arc of Hilo. Also shown, from left: Annemarie Meike, Mark Sueksdorf, Marjorie Gonzalez and Larry Ferderber | Photo Courtesy of LLNL April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs What are the key facts? LLNL technologies will reduce the plant's electrical bills by 50 percent and provide sustainable and energy efficient solutions for the

336

FY 2012 Lawrence Livermore National Security, LLC, PER Summary | National  

National Nuclear Security Administration (NNSA)

PER Summary | National PER Summary | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog FY 2012 Lawrence Livermore National Security, LLC, PER Summary Home > About Us > Our Operations > Acquisition and Project Management > Performance Evaluations > FY 2012 Lawrence Livermore National Security, LLC, ...

337

Technical Safety Appraisal of the Lawrence Livermore National Laboratory  

SciTech Connect

This report documents the results of the Technical Safety Appraisal (TSA) of the Lawrence Livermore National Laboratory (LLNL) (including the Site 300 area), Livermore, California, conducted from February 26 to April 5, 1990. The purpose of the assessment was to provide the Secretary of Energy with the status of Environment, Safety and Health (ES H) Programs at LLNL. LLNL is operated by the University of California for the Department of Energy (DOE), and is a multi-program, mission-oriented institution engaged in fundamental and applied research programs that require a multidisciplinary approach. 1 fig.

1990-12-01T23:59:59.000Z

338

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Summary-1992.html[6/24/2011 3:44:58 PM] Summary-1992.html[6/24/2011 3:44:58 PM] EXECUTIVE SUMMARY The U.S. Department of Energy (DOE) and the Regents of the University of California (UC) propose the continued operation, including near-term (within 5 to 10 years) proposed projects, of the Lawrence Livermore National Laboratory (LLNL). In addition, DOE proposes the continued operation, including near-term proposed projects, of Sandia National Laboratories, Livermore (SNL, Livermore). Continued operation plus proposed projects at the two Laboratories is needed so that the research and development missions established by Congress and the President can continue to be supported. As provided and encouraged by the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA), DOE and UC have prepared this document as a joint Environmental Impact Statement (EIS) and

339

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2-1992/01eis0157_a.html[6/27/2011 9:53:34 AM] 2-1992/01eis0157_a.html[6/27/2011 9:53:34 AM] APPENDIX A DESCRIPTION OF MAJOR PROGRAMS AND FACILITIES Appendix A describes the programs, infrastructures, facilities, and future plans of Lawrence Livermore National Laboratory (LLNL) and the Sandia National Laboratories at Livermore (SNL, Livermore). It provides information on existing activities and facilities, as well as information on those activities anticipated to occur or facilities to be constructed over the next 5 to 10 years. The purpose of this appendix is to: present information that can be used to evaluate the proposed action and other EIS/EIR alternatives, identify activities that are part of the proposed action, distinguish proposed action activities from no action alternative activities, and

340

Final Clean Closure Report Site 300 Surface Impoundments Closure Lawrence Livermore National Laboratory Livermore, California  

Science Conference Proceedings (OSTI)

Lawrence Livermore National Laboratory operated two Class II surface impoundments that stored wastewater that was discharged from a number of buildings located on the Site 300 Facility (Site 300). The wastewater was the by-product of explosives processing. Reduction in the volume of water discharged from these buildings over the past several years significantly reduced the wastewater storage needs. In addition, the impoundments were constructed in 1984, and the high-density polyethylene (HDPE) geomembrane liners were nearing the end of their service life. The purpose of this project was to clean close the surface impoundments and provide new wastewater storage using above ground storage tanks at six locations. The tanks were installed and put into service prior to closure of the impoundments. This Clean Closure Report (Closure Report) complies with State Water Resources Control Board (SWRCB) Section 21400 of the California Code of Regulations Title 27 (27 CCR section 21400). As required by these regulations and guidance, this Closure Report provides the following information: (1) a brief site description; (2) the regulatory requirements relevant to clean closure of the impoundments; (3) the closure procedures; and (4) the findings and documentation of clean closure.

Haskell, K

2006-02-14T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Review of the Lawrence Livermore National Laboratory Health Services Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Environment, Safety, and Health Environment, Safety, and Health Oversight Review of the Lawrence Livermore National Laboratory Health Services Department March 2001 Office of Environment, Safety and Health i TABLE OF CONTENTS Page ACRONYMS................................................................................................................. iii 1.0 INTRODUCTION.................................................................................................. 1 2.0 RESULTS .............................................................................................................. 2 3.0 CONCLUSIONS.................................................................................................... 4 APPENDIX A.................................................................................................................

342

Industrial ecology at Lawrence Livermore National Laboratory summary statement  

SciTech Connect

At Livermore our hope and our intention is to make important contributions to global sustainability by basing both our scientific and technological research and our business practices on the principles of industrial ecology. Current efforts in the following fields are documented: global security, global ecology, energy for transportation, fusion energy, materials sciences, environmental technology, and bioscience.

Gilmartin, T.J.

1996-06-04T23:59:59.000Z

343

Independent Oversight Inspection of Emergency Management at the Lawrence Livermore National Laboratory - Volume II  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore Lawrence Livermore National Laboratory Office of Independent Oversight and Performance Assurance Office of the Secretary of Energy July 2002 Volume II INDEPENDENT OVERSIGHT INSPECTION OF EMERGENCY MANAGEMENT AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY Volume II July 2002 i INDEPENDENT OVERSIGHT INSPECTION OF EMERGENCY MANAGEMENT AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY Volume II Table of Contents Acronyms ......................................................................................................................................... iii 1.0 Introduction ................................................................................................................................1 2.0 Results .......................................................................................................................................3

344

Supplement analysis for continued operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Volume 2: Comment response document  

Science Conference Proceedings (OSTI)

The US Department of Energy (DOE), prepared a draft Supplement Analysis (SA) for Continued Operation of Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories, Livermore (SNL-L), in accordance with DOE`s requirements for implementation of the National Environmental Policy Act of 1969 (NEPA) (10 Code of Federal Regulations [CFR] Part 1021.314). It considers whether the Final Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore (1992 EIS/EIR) should be supplement3ed, whether a new environmental impact statement (EIS) should be prepared, or no further NEPA documentation is required. The SA examines the current project and program plans and proposals for LLNL and SNL-L, operations to identify new or modified projects or operations or new information for the period from 1998 to 2002 that was not considered in the 1992 EIS/EIR. When such changes, modifications, and information are identified, they are examined to determine whether they could be considered substantial or significant in reference to the 1992 proposed action and the 1993 Record of Decision (ROD). DOE released the draft SA to the public to obtain stakeholder comments and to consider those comments in the preparation of the final SA. DOE distributed copies of the draft SA to those who were known to have an interest in LLNL or SNL-L activities in addition to those who requested a copy. In response to comments received, DOE prepared this Comment Response Document.

NONE

1999-03-01T23:59:59.000Z

345

Final Revised Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, California  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

R R Final Revised Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, California Issued: December 2002 Revised: January 2008 Department of Energy National Nuclear Security Administration Livermore Site Office This page intentionally left blank. FINAL Revised EA for the Proposed Construction and Operation of a Biosafety Level 3 Facility at LLNL ii FORWARD The National Nuclear Security Administration (NNSA) of the Department of Energy (DOE) has responsibility for national programs to reduce and counter threats from weapons of mass destruction including nuclear, chemical, and biological weapons (bioweapons). NNSA's bioscience work at Lawrence Livermore National Laboratory (LLNL) in support of these

346

Secretary of Energy Advisory Board Lawrence Livermore Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore Laboratory Lawrence Livermore Laboratory October 12, 2011 Agenda Open Plenary Meeting Session 9:30 AM-9:45 AM Welcome and Overview Secretary Steven Chu and Dr. William Perry 9:45 AM-10:00 AM Director's Perspective George Miller, LLNL Director 10:00 AM-10:40 AM LLNL Progress Towards Ignition and Weapons Physics Experiments on NIF Bruce Goodwin and Ed Moses 10:40 AM-11:00 AM LLNL Strategy for Improvements in Cyber Security Jim Brase 11:00 AM-11:20 AM LLNL Computational Advances in Applied Energy Julio Friedman 11:20 AM-12:00 PM DOE in the Innovation Chain Secretary Chu 12:00 PM-1:30 PM Lunch Break 1:30 PM-1:45 PM Subcommittee Updates 1:45 PM-2:30 PM Blue Ribbon Commission Update

347

Alan Alda awards Lawrence Livermore engineer for making science  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 For immediate release: 06/04/2013 | NR-13-06-01 From left: Steve Maguire, who won in the video category of the 2013 Flame Challenge, Alan Alda and Nick Williams, who won in the written category. Alan Alda awards Lawrence Livermore engineer for making science understandable Linda A Lucchetti, LLNL, (925) 422-5815, lucchetti1@llnl.gov Students from Candlewood Middle School in Dix Hills N.Y. join Alan Alda in presenting the Flame Challege Award to Nick Williams at the World Science Festival. What is time? How would you explain it to a 5th grader? Nick Williams, a retired engineer and science presenter from Lawrence Livermore National Laboratory not only has done a fine job of conveying the concept of time to 11 year olds, he's being recognized for it. Williams

348

It's only natural: Lawrence Livermore helps find link to  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 For immediate release: 03/04/2013 | NR-13-03-01 It's only natural: Lawrence Livermore helps find link to arsenic-contaminated groundwater Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly Hand pump at a community well of a sampling site in Bangladesh. Human activities are not the primary cause of arsenic found in groundwater in Bangladesh. Instead, a team of researchers from Lawrence Livermore National Laboratory, Barnard College, Columbia University, University of Dhaka, Desert Research Institute and University of Tennessee found that the arsenic in groundwater in the region is part of a natural process that predates any recent human activity, such as intensive pumping. The results appear in the March 4 edition of the Proceedings of the

349

Public Affairs Office: Livermore Lab Physicist Dates Lifetime of Solar  

NLE Websites -- All DOE Office Websites (Extended Search)

Dating the Solar System: Where Were You When the Solar System Was Being Formed? Dating the Solar System: Where Were You When the Solar System Was Being Formed? Chemistry & Materials Science Directorate, LLNL Chronology of the early Solar System from chondrule-bearing calcium-aluminium-rich inclusions Nature, April 21, 2005 Building Planets at PSI: The Origin of the Solar System Planetary Science Institute Social Media Logos Follow LLNL on YouTube Subscribe to LLNL's RSS feed Follow LLNL on Facebook Follow LLNL on Twitter Follow LLNL on Flickr Contact: Anne M. Stark Phone: (925) 422-9799 E-mail: stark8@llnl.gov FOR IMMEDIATE RELEASE April 20, 2005 NR-05-04-02 Livermore Lab physicist dates lifetime of solar nebula at two million years LIVERMORE, Calif. - The oxygen and magnesium content of some of the oldest objects in the universe are giving clues to the lifetime of the

350

Laser fusion experiment yields record energy at Lawrence Livermore's  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 For immediate release: 08/26/2013 | NR-13-08-04 High Resolution Image All NIF experiments are controlled and orchestrated by the integrated computer control system in the facility's control room. It consists of 950 front-end processors attached to about 60,000 control points, including mirrors, lenses, motors, sensors, cameras, amplifiers, capacitors and diagnostic instruments. Laser fusion experiment yields record energy at Lawrence Livermore's National Ignition Facility Breanna Bishop, LLNL, (925) 423-9802, bishop33@llnl.gov High Resolution Image The preamplifiers of the National Ignition Facility are the first step in increasing the energy of laser beams as they make their way toward the target chamber. LIVERMORE, Calif. -- In the early morning hours of Aug.13, Lawrence

351

Smashing science: Livermore scientists discover how explosives respond to  

NLE Websites -- All DOE Office Websites (Extended Search)

3 3 For immediate release: 12/12/2013 | NR-13-12-03 High Resolution Image A schematic representation of the shock experiment. The resulting energy release pushed the shock front to the left. Image by Liam Krauss/LLNL. Smashing science: Livermore scientists discover how explosives respond to shockwaves Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Watch Video A laser pulse impinging on an aluminum ablation layer (which is coated on a glass substrate to the right), which generates a rapidly expanding plasma. This small explosion pushes the ablator to the left and drives a shock wave in the sample. The experiment simultaneously measures the speed of the shock wave in the sample, and the speed of the ablator expansion, which allows Livermore researchers to estimate the pressure and density of the

352

The Computation Directorate at Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

The Computation Directorate at Lawrence Livermore National Laboratory has four major areas of work: (1) Programmatic Support -- Programs are areas which receive funding to develop solutions to problems or advance basic science in their areas (Stockpile Stewardship, Homeland Security, the Human Genome project). Computer scientists are 'matrixed' to these programs to provide computer science support. (2) Livermore Computer Center (LCC) -- Development, support and advanced planning for the large, massively parallel computers, networks and storage facilities used throughout the laboratory. (3) Research -- Computer scientists research advanced solutions for programmatic work and for external contracts and research new HPC hardware solutions. (4) Infrastructure -- Support for thousands of desktop computers and numerous LANs, labwide unclassified networks, computer security, computer-use policy.

Cook, L

2006-09-07T23:59:59.000Z

353

Livermore team successfully leads important test of a conventional warhead  

NLE Websites -- All DOE Office Websites (Extended Search)

102813_dod 102813_dod 10/28/2013 Livermore team successfully leads important test of a conventional warhead for the DoD Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov LLNL served as technical lead and integrator on an important test to assess a new conventional warhead designed by the Lab. Dave Hare, Livermore's program manager of the test, called it an "unequivocal success." Below is the press release from the Department of Defense Defense Department successfully conducts warhead sled test The Defense Department announced recently the successful testing of an advanced conventional precision effects warhead, a critical part of a national effort to establish a conventional prompt strike capability. This capability will contribute to the country's ability to defend its interests

354

Industrial ecology at Lawrence Livermore National Laboratory summary statement  

Science Conference Proceedings (OSTI)

This statement summarizes Lawrence Livermore National Laboratory`s committment to making important scientific, technological, and business contributions to global sustainability. The quest has many aspects, some socio-political or economic and some technological, and some in which the soft and hard sciences become indistinguishable, as in visionary national strategies, like Holland`s, and futuristic regional and city development plans, like those of Kagoshima and Chattanooga.

Gilmartin, T.J.

1996-05-21T23:59:59.000Z

355

LINCS: Livermore's network architecture. [Octopus computing network  

SciTech Connect

Octopus, a local computing network that has been evolving at the Lawrence Livermore National Laboratory for over fifteen years, is currently undergoing a major revision. The primary purpose of the revision is to consolidate and redefine the variety of conventions and formats, which have grown up over the years, into a single standard family of protocols, the Livermore Interactive Network Communication Standard (LINCS). This standard treats the entire network as a single distributed operating system such that access to a computing resource is obtained in a single way, whether that resource is local (on the same computer as the accessing process) or remote (on another computer). LINCS encompasses not only communication but also such issues as the relationship of customer to server processes and the structure, naming, and protection of resources. The discussion includes: an overview of the Livermore user community and computing hardware, the functions and structure of each of the seven layers of LINCS protocol, the reasons why we have designed our own protocols and why we are dissatisfied by the directions that current protocol standards are taking.

Fletcher, J.G.

1982-01-01T23:59:59.000Z

356

Environmental Impact Statement and Environmental Impact Report for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1-1992/01eis0157_rg.html[6/24/2011 4:00:49 PM] 1-1992/01eis0157_rg.html[6/24/2011 4:00:49 PM] READER'S GUIDE The Final EIS/EIR is organized to assist the reader's understanding of the complex operations at Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore. Organization of Documents The EIS/EIR is divided into five volumes and two companion reports: Volume I. This volume contains the Final EIS/EIR, which in part relies on the detailed information in the appendices, and comprehensively discusses the proposed action, the alternatives, and the existing conditions and impacts of the proposed action and the alternatives. Volume II. This volume contains the Final EIS/EIR technical appendices which provide technical support for the analyses in Volume I and also provide additional information and references. Appendix E was originally identified in

357

Fixed Monthly Living Expense Payments at the Lawrence Livermore National Laboratory, INS-L-11-05  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fixed Monthly Living Expense Fixed Monthly Living Expense Payments at the Lawrence Livermore National Laboratory INS-L-11-05 September 2011 Department of Energy Washington, DC 20585 September 21, 2011 MEMORANDUM FOR MANAGER, LIVERMORE SITE OFFICE FROM: Sandra D. Bruce Assistant Inspector General for Inspections SUBJECT: INFORMATION: Inspection Report on "Fixed Monthly Living Expense Payments at the Lawrence Livermore National Laboratory" BACKGROUND The Lawrence Livermore National Laboratory (Livermore) is a Department of Energy (Department) laboratory managed and operated by Lawrence Livermore National Security, LLC, for the Department's National Nuclear Security Administration (NNSA). Livermore's mission is to ensure the safety and security of the nation through applied science and technology in key

358

Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0 Things You Didn't Know About Lawrence Livermore National 0 Things You Didn't Know About Lawrence Livermore National Laboratory Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory December 6, 2013 - 6:18pm Addthis The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. Ben Dotson Ben Dotson Project Coordinator for Digital Reform, Office of Public Affairs What are the key facts? Founded in 1952, Lawrence Livermore National Lab is one of the

359

A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to Mend  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to Mend Broken Hearts A Cure for the Valentine's Blues? Livermore Supercomputer Seeks to Mend Broken Hearts February 14, 2013 - 9:56am Addthis The Cardioid code developed by a team of Livermore and IBM scientists divides the heart into a large number of manageable pieces, or subdomains. The development team used two approaches, called Voronoi (left) and grid (right), to break the enormous computing challenge into much smaller individual tasks. | Photo from the Lawrence Livermore National Laboratory The Cardioid code developed by a team of Livermore and IBM scientists divides the heart into a large number of manageable pieces, or subdomains. The development team used two approaches, called Voronoi (left) and grid

360

Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Top 10 Things You Didn't Know About Lawrence Livermore National Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory Top 10 Things You Didn't Know About Lawrence Livermore National Laboratory December 6, 2013 - 6:18pm Addthis The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. The photo above is of a cryogenically cooled target in the National Ignition Facility as "seen" by the laser through the hohlraum's laser entrance hole. | Photo courtesy of Lawrence Livermore National Laboratory. Ben Dotson Ben Dotson Project Coordinator for Digital Reform, Office of Public Affairs What are the key facts? Founded in 1952, Lawrence Livermore National Lab is one of the

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Lawrence Livermore Laser Fusion Program: a status report  

SciTech Connect

The Laser Fusion Program at the Lawrence Livermore Laboratory is presently emerging from a three-year period of intensive development of the tools required for significant DT implosion experiments of continuously increasing scale. These diverse tools include target design codes, sophisticated target fabrication techniques, radically new diagnostics instrumentation, high peak- power-high brightness laser technology, and fully integrated laser-target- diagnostic irradiation facilities. These tools have recently led to the successful production of neutrons from compressed DT-containing targets together with a wealth of correlating plasma physics data. The current status of major program activities at LLL will be reviewed and major future milestones will be projected. (auth)

Krupke, W.F.

1975-04-15T23:59:59.000Z

362

Preliminary Notice of Violation, Lawrence Livermore National Laboratory- EA-2000-12  

Energy.gov (U.S. Department of Energy (DOE))

Preliminary Notice of Violation issued to the University of California related to Authorization Basis Issues at the Lawrence Livermore National Laboratory, (EA-2000-12)

363

Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, CA (DOE/EA-1442) (12/02)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Environmental Assessment for The Proposed Construction and Operation of a Biosafety Level 3 Facility at Lawrence Livermore National Laboratory, Livermore, California December 2002 Department of Energy National Nuclear Security Administration Oakland Operations Office EA for the Proposed Construction and Operation of a Biosafety Level 3 Facility at LLNL ii EXECUTIVE SUMMARY The Department of Energy (DOE), National Nuclear Security Administration (NNSA), has responsibility for national programs to reduce and counter threats from weapons of mass destruction including nuclear, chemical, and biological weapons (bioweapons). NNSA's bioscience work at Lawrence Livermore National Laboratory (LLNL) in support of these missions requires work with infectious agents, including those historically used for bioweapons.

364

Closed Sessions Program The closed session program plan is given in detail in Appendix I-A. The program started  

E-Print Network (OSTI)

for enhancing renewable energy usage · Assist in education and research in renewable energy · Changing behavior on "Energy for Sustainable Development: Perspectives from the Arab Region", followed by 20-minute presentations by participating Middle East Universities on their country specific energy profiles, with emphasis

365

Automotive Stirling Engine Market and Industrial Readiness Program (MIRP). Final report for Phase IA, September 15, 1982-July 31, 1984  

SciTech Connect

A brief history of the project is presented. Included in appendices are the scope of work, management and cost plans, major milestones, and the digital engine control spare parts' list. (MHR)

Not Available

1984-08-01T23:59:59.000Z

366

Analysis of the Thermal Performance of Tierra I--A Low-Energy High-Mass Residence  

DOE Green Energy (OSTI)

A low-energy concrete house was designed using passive solar strategies to consume 70% less heating and cooling energy than a base case that conformed to the 1996 Home Energy Rating System (HERS) and the 1995 Model Energy Code (MEC). The performance of this house was then evaluated using computer simulations and measured data. The house, Tierra I, was monitored from July 22, 1996, through October 14, 1997. A Short Term Energy Monitoring (STEM) test was done November 19 to December 10, 1996. Computer simulations of the house were done using SUNREL, an updated version of the hourly data simulation package SERI-RES. The SUNREL model of the house was calibrated using both short- and long-term data. The house achieved energy savings of 56%, below the goal of 70%. The lower than expected savings resulted from problems with the window modeling. As a result, during the design phase the solar gains were overestimated causing an underestimate in the level of insulation necessary to achieve the savings goal. For very low-energy passive solar buildings, it is apparent that very accurate window modeling is required. It also became apparent that accurate ground models are required as well because ground-heat loss accounts for a significant portion of the total heat loss in low-energy buildings.

Smith, M. W.

2001-05-31T23:59:59.000Z

367

IA-SDSS: A GIS-based land use decision support system with consideration of carbon sequestration  

Science Conference Proceedings (OSTI)

Land use, land use change and forestry (LULUCF) can play a positive role in mitigating global warming by sequestering carbon from the atmosphere into vegetation and soils. Local entities (e.g. local government, community, stockholders) have been making ... Keywords: Carbon models, Carbon sequestration, GIS, Integrated assessment, Land-use planning, RS, SDSS

Jun Wang; Jingming Chen; Weimin Ju; Manchun Li

2010-04-01T23:59:59.000Z

368

On October 15, 2010, the University of Memphis Center for Information Assurance (CfIA) hosted the 3rd  

E-Print Network (OSTI)

digital devices, and we encourage you to read the excellent summary from the National Counter-Intelligence for an unspecified period of time. This policy applies to anyone entering the country, including US citizens

Memphis, University of

369

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z ~; 0.5  

E-Print Network (OSTI)

A. 1999, ApJ, 525, 583 Balbi, A. , Ade, P. , Bock, J. etJa?e, A.H. , Ade, P.A. , Balbi, A. et al. , 2001, Phys. Rev.

2005-01-01T23:59:59.000Z

370

Ab initio formation energies of FeCr alloys P. Olsson a,*, I.A. Abrikosov b  

E-Print Network (OSTI)

University, Box 534, SE-75121 Uppsala, Sweden c Department of Nuclear and Reactor Physics, Royal Institute Uppsala, Sweden b Condensed Matter Theory Group, Physics Department, AAngstroom Laboratory, Uppsala reactors, face centered cubic (fcc) and hexagonal close packed (hcp) phases were considered in order

371

Phenotypic Data Collection and Sample Preparation for Genomics of Wood Formation and Cellulosic Biomass Traits in Sunflower: Ames, IA location.  

Science Conference Proceedings (OSTI)

Three fields were planted in Ames in 2010, two association mapping fields, N3 and A, and a recombinant inbred line field, N13. Phenotype data and images were transferred to UGA to support genetic and genomic analyses of woody biomass-related traits.

Marek, Laura F.

2011-06-17T23:59:59.000Z

372

Sandia National Laboratories: Visiting the Livermore Valley Open Campus  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting the LVOC Visiting the LVOC LVOC Home Partnership Opportunities Featured Programs Working at the LVOC Are you a member of the research, business, or academic community who would like to learn more about current and future opportunities at the Livermore Valley Open Campus? We're actively seeking companies, research organizations, universities, and other laboratories with interests in energy, computing, homeland security, and other laboratory mission areas. Request a visit Contact us to explore collaborative opportunities and to discuss a potential visit to the LVOC. We look forward to hearing from you! Map and directions Directions to the LVOC Screen reader users: click here for plain HTML Go to Google Maps Home 37.679620,-121.697112 Loading... Map Sat Ter Did you mean a different:

373

Pb-Free Sn-Ag-Cu-Mn Solder - Energy Innovation Portal  

Anderson, Iver E. (Ames, IA), Harringa, Joel (Ames, IA), Walleser, Jason K. (Idaho Falls, IA) Assignee: Iowa State University Research Foundation, ...

374

Laser System for Livermore's Mono Energetic Gamma-Ray Source  

SciTech Connect

A Mono-energetic Gamma-ray (MEGa-ray) source, based on Compton scattering of a high-intensity laser beam off a highly relativistic electron beam, requires highly specialized laser systems. To minimize the bandwidth of the {gamma}-ray beam, the scattering laser must have minimal bandwidth, but also match the electron beam depth of focus in length. This requires a {approx}1 J, 10 ps, fourier-transform-limited laser system. Also required is a high-brightness electron beam, best provided by a photoinjector. This electron source requires a second laser system with stringent requirements on the beam including flat transverse and longitudinal profiles and fast rise times. Furthermore, these systems must be synchronized to each other with ps-scale accuracy. Using a novel hyper-dispersion compressor configuration and advanced fiber amplifiers and diode-pumped Nd:YAG amplifiers, we have designed laser systems that meet these challenges for the X-band photoinjector and Compton-scattering source being built at Lawrence Livermore National Laboratory.

Gibson, D; Albert, F; Bayramian, A; Marsh, R; Messerly, M; Ebbers, C; Hartemann, F

2011-03-14T23:59:59.000Z

375

Nonlinear RR Lyrae models with new Livermore opacities  

Science Conference Proceedings (OSTI)

A.N. Cox recently showed that a 20% opacity decrease in the 20,000--30,000 K region as indicated by the new Livermore OPAL opacities reconciles the discrepancy between pulsation and evolution masses of double-mode RR Lyrae variables. Nonlinear hydrodynamic calculations were performed for RR Lyrae models of mass 0l75 M{circle_dot}, 51 L{circle_dot}, and Z=0.0001 including this opacity decrease. The Stellingwerf periodic relaxation method was used to converge the models to a limit cycle, and the Floquet matrix eigenvalues calculated to search for a tendency of the fundamental mode to grow from the full-amplitude overtone solution, and the overtone mode to grow from the full-amplitude fundamental solution, thereby predicting double-mode behavior. Models of T{sup eff} < 7000 K with the opacity decrease have positive fundamental-mode growth rates in the overtone solution, in contrast to earlier results by Hodson and Cox, and models with T{sub eff} < 7000 have positive 1st overtone growth rates in the fundamental-mode behavior was not found.

Guzik, J.A.; Cox, A.N.

1992-05-01T23:59:59.000Z

376

Nonlinear RR Lyrae models with new Livermore opacities  

Science Conference Proceedings (OSTI)

A.N. Cox recently showed that a 20% opacity decrease in the 20,000--30,000 K region as indicated by the new Livermore OPAL opacities reconciles the discrepancy between pulsation and evolution masses of double-mode RR Lyrae variables. Nonlinear hydrodynamic calculations were performed for RR Lyrae models of mass 0l75 M{circle dot}, 51 L{circle dot}, and Z=0.0001 including this opacity decrease. The Stellingwerf periodic relaxation method was used to converge the models to a limit cycle, and the Floquet matrix eigenvalues calculated to search for a tendency of the fundamental mode to grow from the full-amplitude overtone solution, and the overtone mode to grow from the full-amplitude fundamental solution, thereby predicting double-mode behavior. Models of T{sup eff} < 7000 K with the opacity decrease have positive fundamental-mode growth rates in the overtone solution, in contrast to earlier results by Hodson and Cox, and models with T{sub eff} < 7000 have positive 1st overtone growth rates in the fundamental-mode behavior was not found.

Guzik, J.A.; Cox, A.N.

1992-01-01T23:59:59.000Z

377

Research collaboration opportunities at Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

The Lawrence Livermore National Laboratory (LLNL) is a major research facility within the Department of Energy (DOE) complex. LLNL`s traditional mission is in Defense Programs, including a significant effort in non-proliferation and arms control. In terms of disciplinary areas, over 50% of our present research efforts are in the fields of large-scale computing, high energy-density physics, energy and environmental sciences, engineering, materials research, manufacturing, and biotechnology. The present decade presents new challenges to LLNL. Many factors have influenced us in modifying our research approach. The main driver is the realization that many scientific problems in our mission areas can best be solved by collaborative teams of experts. At LLNL we excel in physical sciences, but we need the expertise of many others, beyond our established areas of expertise. For example, to find an acceptable solution to reduce earthquake damage requires contributions from engineering, soil mechanics, hydrology, materials sciences, Geosciences, computer modeling, economics, law, and political science. In the pursuit of our mission goals, we are soliciting increased research collaborations with university faculty and students. The scientific and national security challenges facing us and our nation today are unprecedented. Pooling talents from universities, other research organizations, and the national laboratories will be an important approach to finding viable solutions.

Budwine, C.M.

1996-09-01T23:59:59.000Z

378

Progress in inertial confinement fusion at Lawrence Livermore National Laboratory  

SciTech Connect

The goals of the Inertial Fusion Program at the Lawrence Livermore National Laboratory are to study matter under extreme conditions of temperature and pressure and to produce fusion energy from inertially confined fusion fuel. With the conclusion of recent multi-kilojoule 0.53 ..mu..m experiments on Novette, we have demonstrated vastly improved plasma conditions compared to those previously obtained at LLNL with similar energies at 1.06 ..mu..m and elsewhere with 10 ..mu..m radiation. The lower preheat environment obtainable with short wavelength light has led to 3X improvements in the compression of targets on Novette compared to similar targets on Shiva with 1.06 ..mu..m. Subsequent experiments on Nova with short wavelength light will begin in 1985. They are expected to demonstrate the necessary compression conditions required for high gain fusion to occur when irradiated with a multi-megajoule driver. These recent results, together with improved calculations, and innovations in driver and reactor technology, indicate that high gain inertial fusion will occur and is a viable candidate for fusion power production in the future.

Holzrichter, J.F.

1984-08-06T23:59:59.000Z

379

Lawrence Livermore National Laborotory Safety Basis Assessment Final February 11, 2011  

NLE Websites -- All DOE Office Websites (Extended Search)

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Safety Basis Assessment INTRODUCTION This site visit report documents the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. This combined assessment was sponsored by the National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) and conducted jointly by staff from the Office of Health, Safety and Security (HSS) and LSO. The review was conducted in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. Overall, the LLNL programs

380

The Current and Historical Distribution of Special Status Amphibians at the Livermore Site and Site 300  

SciTech Connect

65 surveys were completed in 2002 to assess the current distribution of special status amphibians at the Lawrence Livermore National Laboratory's (LLNL) Livermore Site and Site 300. Combined with historical information from previous years, the information presented herein illustrates the dynamic and probable risk that amphibian populations face at both sites. The Livermore Site is developed and in stark contrast to the mostly undeveloped Site 300. Yet both sites have significant issues threatening the long-term sustainability of their respective amphibian populations. Livermore Site amphibians are presented with a suite of challenges inherent of urban interfaces, most predictably the bullfrog (Rana catesbeiana), while Site 300's erosion issues and periodic feral pig (Sus scrofa) infestations reduce and threaten populations. The long-term sustainability of LLNL's special status amphibians will require active management and resource commitment to maintain and restore amphibian habitat at both sites.

Hattem, M V; Paterson, L; Woollett, J

2008-08-20T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Sandia/California named winner of "Environmental Spirit" Award by Livermore  

NLE Websites -- All DOE Office Websites (Extended Search)

RELEASES RELEASES FOR IMMEDIATE RELEASE January 31, 2008 Sandia/California named winner of "Environmental Spirit" Award by Livermore Chamber of Commerce LIVERMORE, Calif. -Sandia National Laboratories' Livermore, Calif., site has been selected by the Livermore Chamber of Commerce as recipient of its inaugural Environmental Spirit Award. The award was presented to Sandia for its environmental programs and ongoing commitment to protecting the environment, wildlife, and numerous species on the laboratory's 400-acre site, says Dale Kaye Chamber president and CEO. "Sandia has not only shown tremendous sensitivity to the land they occupy, but also a dedicated commitment to its community," says Kaye. "This is an organization that helps to protect our world and we are

382

Lawrence Livermore National Laborotory Safety Basis Assessment Final February 11, 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory Safety Basis Assessment INTRODUCTION This site visit report documents the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. This combined assessment was sponsored by the National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) and conducted jointly by staff from the Office of Health, Safety and Security (HSS) and LSO. The review was conducted in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. Overall, the LLNL programs

383

Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

HSS Independent Activity Report - Rev. 0 Report Number: HIAR LLNL-2013-02-27 Site: Lawrence Livermore National Laboratory (LLNL) Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Lawrence Livermore National Laboratory Operational Drill at the B332 Plutonium Facility Date of Activity: 02/27/2013 Report Preparer: Thomas Rogers Activity Description/Purpose: The Livermore Site Office (LSO) and Lawrence Livermore National Security, LLC (LLNS) requested personnel from the U.S. Department of Energy (DOE) Office of Safety and Emergency Management Evaluations (HS-45) to observe an operational drill at the Plutonium Facility in Building 332 (B332). LSO and LLNS desired HS-45's participation to help

384

EA-1106: Explosive Waste Treatment Facility at Site 300, Lawrence Livermore  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

106: Explosive Waste Treatment Facility at Site 300, Lawrence 106: Explosive Waste Treatment Facility at Site 300, Lawrence Livermore National Laboratory, San Joaquin County, California EA-1106: Explosive Waste Treatment Facility at Site 300, Lawrence Livermore National Laboratory, San Joaquin County, California SUMMARY This EA evaluates the environmental impacts of the proposal to build, permit, and operate the Explosive Waste Treatment Facility to treat explosive waste at the U.S. Department of Energy's Lawrence Livermore National Laboratory Experimental Test Site, Site 300. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD April 16, 1996 EA-1106: Finding of No Significant Impact Explosive Waste Treatment Facility at Site 300, Lawrence Livermore National Laboratory April 16, 1996

385

Evaluation of HotSpot, Lawerence Livermore National Laboratory - June 11,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Evaluation of HotSpot, Lawerence Livermore National Laboratory - Evaluation of HotSpot, Lawerence Livermore National Laboratory - June 11, 2010 Evaluation of HotSpot, Lawerence Livermore National Laboratory - June 11, 2010 June 11, 2010 Letter from Andy Lawrence to John Nasstrom accepting the revised Hotspot In your letter dated April 16, 2010, you summarized the work done by the Lawerence Livermore National Laboratory (LLNL) to meet the Department of Energy's (DOE) recommendations from the 2007, Software Evaluation of HotSpot, and DOE, Safety Software Toolbox Recommendation, for inclusion of V2.07 in the DOE Safety Software Central Registry. Based on this work, you futher requested that HotSpot be included in the DOE Central Registry. Letter from Andy Lawrence to John Nasstrom accepting the revised Hotspot More Documents & Publications

386

Recent laser-plasma interaction experiments at the Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

Recent Livermore experiments are aimed at investigating laser-plasma interaction issues which are relevant to ablatively driven fusion processes. We report the data obtained from using longer pulses and shorter laser wavelengths.

Lee, P.H.Y.

1980-01-01T23:59:59.000Z

387

Creating the laboratory`s future; A strategy for Lawrence Livermore National Laboratory  

SciTech Connect

``Creating The Laboratory`s Future`` describes Livermore`s roles and responsibilities as a Department of Energy (DOE) national laboratory and sets the foundation for decisions about the Laboratory`s programs and operations. It summarizes Livermore`s near-term strategy, which builds on recent Lab achievements and world events affecting their future. It also discusses their programmatic and operational emphases and highlights program areas that the authors believe can grow through application of Lab science and technology. Creating the Laboratory`s Future reflects their very strong focus on national security, important changes in the character of their national security work, major efforts are under way to overhaul their administrative and operational systems, and the continuing challenge of achieving national consensus on the role of the government in energy, environment, and the biosciences.

NONE

1997-09-01T23:59:59.000Z

388

Minutes of the 7th Meeting of the Livermore Vulnerability Committee  

SciTech Connect

This memorandum provides the minutes of the 7th meeting of the Livermore Vulnerability Committee. The Laboratory commitments in the Tapestry experiment, with particular reference to those experiments proposed in the Polaris MK 2 and the Minuteman MK 2 programs.

Germain, L.

1965-05-26T23:59:59.000Z

389

Livermore Field Office Technical Qualification Program Self Assessment Report, May 31, 2013  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nuclear Security Administration (NNSA) Nuclear Security Administration (NNSA) Livermore Field Office Technical Qualification Program Self Assessment Report May 31, 2013 Assessment Team Richard crowe:NNSA NA-SH-80, Team Leader Dan Schwendenman, NNSA NA-SH-50 Carol lngn;:NNSA LFO Facility Operations Approved By: Phll ' F~nt .r/:;,/;.J ~I Date Date Date~/ NNSA Livermore Field Office TQP Self Assessment (NNSA LSO TQP SA) Report Table of Contents Executive Summary ............................................................................................................. 1 Introduction .......................................................................................................................... 3 Scope and Methodology ...................................................................................................... 3

390

Lawrence Livermore National Laboratory Surface Water Protection: A Watershed Approach  

Science Conference Proceedings (OSTI)

This surface water protection plan (plan) provides an overview of the management efforts implemented at Lawrence Livermore National Laboratory (LLNL) that support a watershed approach to protect surface water. This plan fulfills a requirement in the Department of Energy (DOE) Order 450.1A to demonstrate a watershed approach for surface water protection that protects the environment and public health. This plan describes the use of a watershed approach within which the Laboratory's current surface water management and protections efforts have been structured and coordinated. With more than 800 million acres of land in the U.S. under federal management and stewardship, a unified approach across agencies provides enhanced resource protection and cost-effectiveness. The DOE adopted, along with other federal agencies, the Unified Federal Policy for a Watershed Approach to Federal Land and Resource Management (UFP) with a goal to protect water quality and aquatic ecosystems on federal lands. This policy intends to prevent and/or reduce water pollution from federal activities while fostering a cost-effective watershed approach to federal land and resource management. The UFP also intends to enhance the implementation of existing laws (e.g., the Clean Water Act [CWA] and National Environmental Policy Act [NEPA]) and regulations. In addition, this provides an opportunity for the federal government to serve as a model for water quality stewardship using a watershed approach for federal land and resource activities that potentially impact surface water and its uses. As a federal land manager, the Laboratory is responsible for a small but important part of those 800 million acres of land. Diverse land uses are required to support the Laboratory's mission and provide an appropriate work environment for its staff. The Laboratory comprises two sites: its main site in Livermore, California, and the Experimental Test Site (Site 300), near Tracy, California. The main site is largely developed yet its surface water system encompasses two arroyos, an engineered detention basin (Lake Haussmann), storm channels, and wetlands. Conversely, the more rural Site 300 includes approximately 7,000 acres of largely undeveloped land with many natural tributaries, riparian habitats, and wetland areas. These wetlands include vernal pools, perennial seeps, and emergent wetlands. The watersheds within which the Laboratory's sites lie provide local and community ecological functions and services which require protection. These functions and services include water supply, flood attenuation, groundwater recharge, water quality improvement, wildlife and aquatic habitats, erosion control, and (downstream) recreational opportunities. The Laboratory employs a watershed approach to protect these surface water systems. The intent of this approach, presented in this document, is to provide an integrated effort to eliminate or minimize any adverse environmental impacts of the Laboratory's operations and enhance the attributes of these surface water systems, as possible and when reasonable, to protect their value to the community and watershed. The Laboratory's watershed approach to surface water protection will use the U.S. Environmental Protection Agency's Watershed Framework and guiding principles of geographic focus, scientifically based management and partnerships1 as a foundation. While the Laboratory's unique site characteristics result in objectives and priorities that may differ from other industrial sites, these underlying guiding principles provide a structure for surface water protection to ensure the Laboratory's role in environmental stewardship and as a community partner in watershed protection. The approach includes pollution prevention, continual environmental improvement, and supporting, as possible, community objectives (e.g., protection of the San Francisco Bay watershed).

Coty, J

2009-03-16T23:59:59.000Z

391

Inquiry into the De-Inventory of Special Nuclear Material at Lawrence Livermore National Laboratory, OAS-L-12-11  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Inquiry into the De-Inventory of Special Nuclear Material at Lawrence Livermore National Laboratory OAS-L-12-11 September 2012 Department of Energy Washington, DC 20585 September 21, 2012 MEMORANDUM FOR THE MANAGER, LIVERMORE SITE OFFICE FROM: David Sedillo Director, Western Audits Division Office of Inspector General SUBJECT: INFORMATION: Special Report on "Inquiry into the De-Inventory of Special Nuclear Material at Lawrence Livermore National Laboratory" BACKGROUND The Lawrence Livermore National Laboratory (Livermore) is a Department of Energy facility managed and operated by Lawrence Livermore National Security, LLC (LLNS), for the Department's National Nuclear Security Administration (NNSA). Livermore's mission is to

392

Exploring Viral Genomics at Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

This summer I had the privilege of working at Lawrence Livermore National Laboratory under the Nonproliferation, Homeland and International Security Directorate in the Chemical and Biological Countermeasures Division. I worked exclusively on the Viral Identification and Characterization Initiative (VICI) project focusing on the development of multiplexed polymerase chain reaction (PCR) assays. The goal of VICI is to combine several disciplines such as molecular biology, microfluidics, and bioinformatics in order to detect viruses and identify them in order to effectively and quickly counter infectious disease, natural or engineered. The difficulty in such a countermeasure is that little is known about viral diversity due to the ever changing nature of these organisms. In response, VICI is developing a new microfluidic bioanalytical platform to detect known and unknown viruses by analyzing every virus in a sample by isolating them into picoliter sized droplets on a microchip and individually analyzing them. The sample will be injected into a channel of oil to form droplets that will contain viral nucleic acids that will be amplified using PCR. The multiplexed PCR assay will produce a series of amplicons for a particular virus genome that provides an identifying signature. A device will then detect whether or not DNA is present in the droplet and will sort the empty droplets from the rest. From this point, the amplified DNA is released from the droplets and analyzed using capillary gel electrophoresis in order to read out the series of amplicons and thereby determine the identity of each virus. The following figure depicts the microfluidic process. For the abovementioned microfluidic process to work, a method for detecting amplification of target viral nucleic acids that does not interfere with the multiplexed biochemical reaction is required for downstream sorting and analysis. In this report, the successful development of a multiplexed PCR assay using SYBR Green I as a fluorescent dye to detect amplification of viral DNA that can later be integrated into microfluidic PCR system for sorting and analysis is shown.

Kilpatrick, K; Hiddessen, A

2007-08-22T23:59:59.000Z

393

Environmental Assessment for the Proposed Environmental Remediation at Lawrence Livermore National Laboratory Site 300 Pit 7 Complex  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9 9 Environmental Assessment for the Proposed Environmental Remediation at Lawrence Livermore National Laboratory Site 300 Pit 7 Complex January 2007 Department of Energy National Nuclear Security Administration Livermore Site Office EA for the Proposed Environmental Remediation at the Lawrence Livermore National Laboratory Site 300 Pit 7 Complex i CONTENTS 1.0 INTRODUCTION..................................................................................................................1 1.1 Background ......................................................................................................................1 1.2 Purpose and Need for the Action .....................................................................................5

394

Audit of Renovation and New Construction Projects at Lawrence Livermore National Laboratory, WR-B-97-06  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

THE SECRETARY THE SECRETARY FROM: John C. Layton Inspector General SUBJECT: INFORMATION: Report on "Audit of Renovation and New Construction Projects at Lawrence Livermore National Laboratory" BACKGROUND: Lawrence Livermore National Laboratory must periodically renovate existing facilities or build new ones to accomplish its missions or to provide infrastructure to support its missions. The objective of the audit was to determine if Livermore's proposed renovation and new construction projects met mission needs while minimizing the cost to the Government. DISCUSSION: In pursuing three projects, estimated to cost over $78 million, Livermore had not demonstrated that it had selected the

395

Lawrence Livermore and Cool Earth Solar receive $1.7 million for renewable  

NLE Websites -- All DOE Office Websites (Extended Search)

3 3 For immediate release: 05/14/2013 | NR-13-05-03 Lawrence Livermore and Cool Earth Solar receive $1.7 million for renewable energy demonstration project Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly The concentrator photovoltaic (CPV) system in the field. Photo courtesy of Cool Earth Inc. High Resolution Image The California Energy Commission (CEC) has awarded $1.7 million to a partnership between Lawrence Livermore National Laboratory and Cool Earth Solar Inc. (CES) to conduct a community-scale renewable energy integration demonstration project at the Livermore Valley Open Campus. CES is the prime awardee and is contributing an additional $1 million in matching funds to the CEC amount, while LLNL will provide advanced R&D support for the effort.

396

Lawrence Livermore National Laboratory Federal Facility Compliance Order, February 24, 1997 Summary  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Federal Facility Compliance Act Order for Lawrence Federal Facility Compliance Act Order for Lawrence Livermore National Laboratory Compliance Order HWCA 96/97-5002 State California Agreement Type Federal Facility Agreement Legal Driver(s) FFCAct Scope Summary Require compliance by the DOE with a Site Treatment Plan for the treatment of mixed waste at Lawrence Livermore National Laboratory Parties DOE; State of California Environmental Protection Agency (Department of Toxic Substances Control) Date 2/24/1997 SCOPE * Require compliance by the DOE with a Site Treatment Plan for the treatment of mixed waste at Lawrence Livermore National Laboratory. * Address LDR requirements pertaining to storage and treatment of covered waste at LLNL. ESTABLISHING MILESTONES * The Compliance Plan Volume of the STP provides overall schedules for achieving

397

6th US-Russian Pu Science Workshop Lawrence Livermore National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

US-Russian Pu Science Workshop US-Russian Pu Science Workshop Lawrence Livermore National Laboratory University of California, Livermore, California July 14 and 15, 2006 Local Chairs: Michael Fluss, James Tobin, Adam Schwartz LLNL, Livermore, USA Alexander V. Petrovtsev, RFNC * VNIITF, Snezhinsk, Russia Boris A. Nadykto, RFNC * VNIIEF, Sarov, Russia Lidia F. Timofeeva, VNIINM, Moscow, Russia Siegfried S. Hecker, (Luis Morales POC) LANL, Los Alamos, USA Valentin E. Arkhipov, IMP, Ural Branch of RAS, Yekaterinburg, Russia This is a satellite meeting of the "Pu Futures-The Science 2006 International Conference", 9-13 July 2006, Asilomar Conference, Grounds, Pacific Grove Ca. The workshop is hosted by LLNL, under the aegis of the United States/Russian Federation Scientific and Technical Collaboration pursuant

398

Lawrence Livermore, Intel, Cray produce big data machine to serve as  

NLE Websites -- All DOE Office Websites (Extended Search)

1 1 For immediate release: 11/04/2013 | NR-13-11-01 High Resolution Image Catalyst is a unique high performance computing (HPC) cluster that will serve research scientists and provide a proving ground for new HPC and Big Data technologies and architectures. It was recently installed at Lawrence Livermore National Laboratory. Lawrence Livermore, Intel, Cray produce big data machine to serve as catalyst for next-generation HPC clusters Donald B Johnston, LLNL, (925) 423-4902, johnston19@llnl.gov Lawrence Livermore National Laboratory in partnership with Intel and Cray, today announced a unique high performance computing (HPC) cluster that will serve research scientists at all three institutions and provide a proving ground for new HPC and Big Data technologies and architectures.

399

Lawrence Livermore Site Office Safety Basis Self-Assessment Final February 11, 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Livermore Site Office Livermore Site Office Safety Basis Self-Assessment INTRODUCTION This site visit report documents the collective results of the Office of Health, Safety and Security's (HSS) assessment of National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. The assessment was sponsored by LSO as a self-assessment and conducted jointly by HSS and LSO staff. It was completed in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. The assessment revealed that LSO has implemented appropriate plans, procedures, and

400

Lawrence Livermore Site Office Safety Basis Self-Assessment Final February 11, 2011  

NLE Websites -- All DOE Office Websites (Extended Search)

Livermore Site Office Livermore Site Office Safety Basis Self-Assessment INTRODUCTION This site visit report documents the collective results of the Office of Health, Safety and Security's (HSS) assessment of National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. The assessment was sponsored by LSO as a self-assessment and conducted jointly by HSS and LSO staff. It was completed in late 2010 and included site visits from November 29 - December 3, 2010 and December 13-17, 2010. The assessment revealed that LSO has implemented appropriate plans, procedures, and

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Review of the Lawrence Livermore Nationa Laboratory Identiified Defective Department of Transportation Hazardous Material Packages  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5 5 Site Visit Report - Review of the Lawrence Livermore National Laboratory Identified Defective Department of Transportation Hazardous Material Packages This site visit report documents the results of Office of Health, Safety and Security's review of the Lawrence Livermore National Laboratory (LLNL) identification, immediate actions, communications, documentation, evaluation, reporting and follow-up to the discovery of defective Department of Transportation (DOT) UN1A2 55- and 30-gallon open head single bolt closure steel drums intended for storage and transportation of hazardous waste and materials. This review, conducted on January 26-29, 2010, was sponsored by the DOE Livermore Site Office (LSO) to support interface with the lab and this report is intended to support follow-up

402

DOE/EIS-0157-SA-01; Supplement Analysis for Continued Operation of Lawrence Livermore National Laboratory and Sandia National Laboratories, Livermore  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Analysis Analysis S-1 March 1999 Findings ♦ This supplement analysis evaluated a set of new and modified projects and proposals and other new information and concluded that no supplementation of the 1992 EIS/EIR for Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories (SNL), Livermore, is needed. Either the projected impacts are within the bounds of the 1992 EIS/EIR, the impacts were anticipated by mitigation measures established in the 1992 EIS/EIR, or the incremental differences in impacts are not significant. ♦ While proposed increases in administrative limits for radioactive materials at LLNL might slightly increase radiological releases during accidents, the resulting consequences are expected to remain essentially the same as described in the 1992

403

Lawrence Livermore National Laboratory Main Site FFA Under CERCLA Section 120, November 1, 1988 Summary  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lawrence Livermore National Laboratory (Main Site) Lawrence Livermore National Laboratory (Main Site) Federal Facility Agreement Under CERCLA Section 120, November 1, 1988 State California Agreement Type Federal Facility Agreement Legal Driver(s) CERCLA Scope Summary Establish a procedural framework and schedule for developing, implementing, and monitoring appropriate response actions at the Site Parties DOE; USEPA; California Department of Health Services; California Regional Water Quality Control Board Date 11/1/1988 SCOPE * Establish a procedural framework and schedule for developing, implementing, and monitoring appropriate response actions at the Site. * Establish a basis for a determination that the DOE has completed remedial action and corrective measures to satisfaction. ESTABLISHING MILESTONES

404

Independent Oversight Review of Integrated Safety Management System Effectiveness at the Livermore Site Office, October 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Office of Enforcement and Oversight Office of Enforcement and Oversight Independent Oversight Review of Integrated Safety Management System Effectiveness at the Livermore Site Office October 2011 Office of Safety and Emergency Management Evaluations Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose ............................................................................................................................................. 1 2.0 Background ...................................................................................................................................... 1 3.0 Scope ................................................................................................................................................ 1

405

Independent Oversight Review of the Fire Protection Program at Lawrence Livermore National Laboratory, September 2013  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fire Protection Program at Fire Protection Program at Lawrence Livermore National Laboratory May 2011 February 2013 September 2013 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U. S. Department of Energy Table of Contents 1.0 Purpose .................................................................................................................................................... 1 2.0 Background ............................................................................................................................................. 1 3.0 Scope ....................................................................................................................................................... 2

406

Independent Oversight Review of the Fire Protection Program at Lawrence Livermore National Laboratory, September 2013  

NLE Websites -- All DOE Office Websites (Extended Search)

Fire Protection Program at Fire Protection Program at Lawrence Livermore National Laboratory May 2011 February 2013 September 2013 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U. S. Department of Energy Table of Contents 1.0 Purpose .................................................................................................................................................... 1 2.0 Background ............................................................................................................................................. 1 3.0 Scope ....................................................................................................................................................... 2

407

Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory, September 2011  

NLE Websites -- All DOE Office Websites (Extended Search)

Oversight Review of Oversight Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory September 2011 Office of Safety and Emergency Management Evaluations Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose ................................................................................................................................... 1 2.0 Introduction ............................................................................................................................ 1 3.0 Scope ...................................................................................................................................... 1 4.0 Summary of Results ............................................................................................................... 1

408

Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory, September 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Oversight Review of Oversight Review of Integrated Safety Management System Effectiveness at Lawrence Livermore National Laboratory September 2011 Office of Safety and Emergency Management Evaluations Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose ................................................................................................................................... 1 2.0 Introduction ............................................................................................................................ 1 3.0 Scope ...................................................................................................................................... 1 4.0 Summary of Results ............................................................................................................... 1

409

Electromechanical battery research and development at the Lawrence Livermore National Laboratory  

DOE Green Energy (OSTI)

The concepts undergirding a funded program to develop a modular electromechanical battery (EMB) at the Lawrence Livermore National Laboratory are described. Example parameters for EMBs for electric and hybrid-electric vehicles are given, and the importance of the high energy recovery efficiency of EMBs in increasing vehicle range in urban driving is shown.

Post, R.F.; Baldwin, D.E.; Bender, D.A.; Fowler, T.K.

1993-06-01T23:59:59.000Z

410

Lawrence Livermore charitable campaign raises $3.3 million for local  

National Nuclear Security Administration (NNSA)

charitable campaign raises $3.3 million for local charitable campaign raises $3.3 million for local organizations | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Lawrence Livermore charitable campaign raises $3.3 million ... Lawrence Livermore charitable campaign raises $3.3 million for local organizations Posted By Office of Public Affairs

411

Lawrence Livermore wins six R&D Awards for science, technological  

NLE Websites -- All DOE Office Websites (Extended Search)

6-08 6-08 For immediate release: 06/20/2012 | NR-12-06-08 Lawrence Livermore wins six R&D Awards for science, technological innovation Lynda L Seaver, LLNL, (925) 423-3103, seaver1@llnl.gov Printer-friendly Natalia Zaitseva, an LLNL materials scientist, leads a team of Livermore researchers that has developed the first plastic material capable of efficiently distinguishing neutrons from gamma rays, something not thought possible for the past five decades or so. See video. Photo by Jacqueline McBride High Resolution Image The vertical cross-section of the "snowflake" region of an experimental tokamak TCV in Switzerland. The left panel shows broad spreading of the exhaust plasma, and the right shows the snowflake-shaped magnetic field lines (six branches, counting the two directed upward) near the magnetic

412

Livermore scientists assist in solving riddle of black hole spin | National  

NLE Websites -- All DOE Office Websites (Extended Search)

scientists assist in solving riddle of black hole spin | National scientists assist in solving riddle of black hole spin | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Livermore scientists assist in solving riddle of ... Livermore scientists assist in solving riddle of black hole spin Posted By Office of Public Affairs NNSA Blog

413

Livermore scientists assist in solving riddle of black hole spin | National  

National Nuclear Security Administration (NNSA)

scientists assist in solving riddle of black hole spin | National scientists assist in solving riddle of black hole spin | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Livermore scientists assist in solving riddle of ... Livermore scientists assist in solving riddle of black hole spin Posted By Office of Public Affairs NNSA Blog

414

Determination of effective acceleration for use in design at the Lawrence Livermore National Laboratory site  

Science Conference Proceedings (OSTI)

An rms-based effective acceleration study has been conducted for the Lawrence Livermore National Laboratory. The study used real time history records with epicentral distances, magnitudes and site conditions deemed appropriate for the LLNL Livermore site. Only those records having strong motion durations, T{sub D}{prime}, >3.0 seconds, and peak ground acceleration {ge} .4g were selected for determining the effective acceleration hazard curve used in design. These parameters are consistent with LLNL's use of broad-band Newmark-Hall Spectra for design, and the high peak instrumental accelerations corresponding to the return intervals of interest. Study results were used to modify the acceleration hazard curve for facility design/evaluation at LLNL.

Coats, D.W. Jr.

1991-09-01T23:59:59.000Z

415

Assessment of Eligibility to National Register of Historic Places Building 431 Lawrence Livermore National Laboratory  

SciTech Connect

Lawrence Livermore National Laboratory (LLNL) proposes to demolish the original sections of Building 431 at its main site in Livermore, California. As this action will constitute an undertaking within the regulatory constraints of the National Historic Preservation Act, LLNL arranged for an assessment of the building's historic significance. This report provides a brief history of the magnetic fusion energy research activities housed in Building 431 and a historic assessment of the building. The final recommendation of the report is that, although Building 431 housed some significant breakthroughs in accelerator technology and magnetic mirror plasma confinement, it lacks integrity for the periods of significance of those developments. It is, therefore, not eligible to the National Register of Historic Places.

Sullivan, M A; Ullrich, R A

2003-05-07T23:59:59.000Z

416

Energy conservation and management plan for plant facilities at the Livermore site  

SciTech Connect

An energy conservation and management plan for the Livermore site of the Lawrence Livermore Laboratory is presented. The plan defines the energy-conservation goals for the next 10 years and proposes the ways and means of attaining them. The main features contained in this plan are as follows: development of the criteria and underlying assumptions required for long range planning, including energy growth rates and the case for using the concept of the technical-fix energy growth rate, LLL energy outlook and fuel cost projections, and life-cycle-cost criteria; targets of the long-range plan include between 1975 and 1985, an annual energy usage growth equal to 5.8 percent of the 1975 energy consumption, 1985 and thereafter, zero energy growth, a change from the current dependence on natural gas to the use of other fuels for heating, and a doubling of the 30-day strategic oil storage capacity; and cost schedule for the next 10 years.

Ng, W.; Szybalski, S.; Kerr, W. H.; Meyer, H. J.

1976-03-15T23:59:59.000Z

417

From Pilot to Practice - Streamlining Procurement and Engineering at Lawrence Livermore National Laboratory  

E-Print Network (OSTI)

16.33> BACKGROUND Lawrence Livermore National Laboratory (LLNL, http://www.llnl.gov) is a research and development facility owned by the U.S. Department of Energy and managed by the University of California. It was founded in 1952 as a sister lab of the Los Alamos National Laboratory and is located in Livermore, California. Organization The Lab has about 8,000 employees and an annual budget of $1 billion. Its programs include biology and biotechnology; defense and nuclear technologies; energy programs; environmental programs; laser programs; and non-proliferation, arms control and International security. The programs are supported by more general scientific and engineering directorates chemistry and material science; computation; engineering; and physics, and space technology (Figure 1). Director's Office Research Programs Biology and Biotechnology Research Defense and Nuclear Technologies Energy Programs Laser Programs Non-

Judith Gebauer; Frank Frber

2000-01-01T23:59:59.000Z

418

Livermore scientist, engineers train to be inspectors for test ban treaty  

National Nuclear Security Administration (NNSA)

scientist, engineers train to be inspectors for test ban treaty scientist, engineers train to be inspectors for test ban treaty organization | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Livermore scientist, engineers train to be inspectors ... Livermore scientist, engineers train to be inspectors for test ban treaty organization

419

Development of a Novel Depleted Uranium Treatment Process at Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

A three-stage process was developed at Lawrence Livermore National Laboratory to treat potentially pyrophoric depleted uranium metal wastes. The three-stage process includes waste sorting/rinsing, acid dissolution of the waste metal with a hydrochloric and phosphoric acid solution, and solidification of the neutralized residuals from the second stage with clay. The final product is a solid waste form that can be transported to and disposed of at a permitted low-level radioactive waste disposal site.

Gates-Anderson, D; Bowers, J; Laue, C; Fitch, T

2007-01-22T23:59:59.000Z

420

Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory, July 2013  

NLE Websites -- All DOE Office Websites (Extended Search)

Independent Oversight Review of Independent Oversight Review of Preparedness for Severe Natural Phenomena Events at the Lawrence Livermore National Laboratory May 2011 July 2013 Office of Safety and Emergency Management Evaluations Office of Enforcement and Oversight Office of Health, Safety and Security U.S. Department of Energy Table of Contents 1.0 Purpose................................................................................................................................................ 1 2.0 Scope................................................................................................................................................... 1 3.0 Background ......................................................................................................................................... 2

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A Collaborative Effort to Address the Distribution of Plutonium-Contaminated Sludge in Livermore, California  

E-Print Network (OSTI)

For over a half-century, the U.S. Department of Energy nuclear weapons laboratory in Livermore, California has worked with plutonium in the course of its mission to research and develop nuclear weapons. Plutonium releases via the Laboratorys sewer system resulted in the contamination of sewage sludge that was distributed and used widely as soil conditioner in parks, landscaping around public buildings, and in home lawns and gardens. The amount of sludge distributed and the concentration of the radioactivity in the sludge are uncertain. In 1999, research was undertaken to investigate the historic distribution of sewage sludge (1958-1976) in Livermore. Navigating the uncertainties surrounding the sludge distribution more than forty years after it began presented an enormous ethical challenge. Community members who received the sludge at no cost were not told that the sludge they received may have been contaminated with plutonium, and the log-book that had recorded the names and addresses of sludge recipients had disappeared. The half-life of weapons-grade plutonium is about 24,000 years. Therefore, former, current, and future Livermore residents are at potential increased risk of cancer and other health impacts from their largely unrecognized and therefore unavoidable

Patrice Sutton; A Jacqueline Cabasso; A Tracy Barreau; B Marylia Kelley C

2007-01-01T23:59:59.000Z

422

Measurement of Omega_m, Omega_Lambda from a blind analysis of Type Ia supernovae with CMAGIC: Using color information to verify the acceleration of the Universe  

E-Print Network (OSTI)

Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space

2006-01-01T23:59:59.000Z

423

OES-IA Annex IV: Environmental Effects of Marine and Hydrokinetic Devices - Report from the Experts Workshop September 27th 28th 2010 Clontarf Castle, Dublin Ireland  

SciTech Connect

An experts' workshop was convened in Dublin Ireland September 27th 28th 2010 in support of IEA Ocean Energy Systems Implementing Agreement Annex IV. PNNL was responsible for organizing the content of the workshop, overseeing the contractors (Irish Marine Institute) hosting the event, presenting material on Annex IV and materials applicable to the workshop intent. PNNL is also overseeing a contractor (Wave Energy Center/University of Plymouth WEC/UP) in the collection and analysis of the Annex IV data. Fifty-eight experts from 8 countries attended the workshop by invitation, spending two days discussing the needs of Annex IV. Presentations by DOE (background on Annex IV), PNNL (process for developing Annex IV; presentation of the draft database for PNNL project, plans for incorporating Annex IV data), WEC/UP on the environmental effect matrix, and four MHK developers (two from the UK, one from Ireland and one from Sweden; each discussing their own projects and lessons learned for measuring and mitigating environmental effects, as well as interactions with consenting [permitting] processes) helped provide background. The workshop participants worked part of the time in the large group and most of the time in four smaller breakout groups. Participants engaged in the process and provided a wealth of examples of MHK environmental work, particularly in the European nations. They provided practical and actionable advice on the following: Developing the Annex IV database, with specific uses and audiences Strong consensus that we should collect detailed metadata on available data sets, rather than attempting to draw in copious datasets. The participants felt there would then be an opportunity to then ask for specific set of data as needed, with specific uses and ownership of the data specified. This is particularly important as many data collected, particularly in Europe but also in Canada, are proprietary; developers were not comfortable with the idea of handing over all their environmental effects data, but all said they would entertain the request if they specifics were clear. The recommendation was to collect metadata via an online interactive form, taking no more than one hour to complete. Although the idea of cases representing the best practices was recognized as useful, the participants pointed out that there are currently so few MHK projects in the water, that any and all projects were appropriate to highlight as cases. There was also discomfort at the implication that best practices implied lesser practices; this being unhelpful to a new and emerging industry. Workshop participants were asked if they were willing to continue to engage in the Annex IV process; all expressed willingness. The workshop was successful in adequately addressing its objectives and through participation and interaction in the breakout sessions around the various topics. As a result of the workshop, many delegates are now better informed and have a greater understanding of the potential environmental effects of MHK devices on the marine environment. There is now a greater sense of understanding of the issues involved and consensus by those regulators, developers and scientists who attended the workshop. A strong network has also been built over the two days between European and US/Canadian technical experts in wave and tidal energy.

Copping, Andrea E.; O'Toole, Michael J.

2010-12-02T23:59:59.000Z

424

??eia e e et ??? oa0 to 3i5ontinBoB5 PieeFi5e Hinea tiTiUation ...  

E-Print Network (OSTI)

Analysis and Simplicial Subdivision,?l k ?????? ? ransactions onvd ircuits ... Ordered Sets: A Polyhedral Approach,%q h atC? ematicalG? ro?? ram-.

425

Gene F. Parkin, P.E. B.S.C.E. University of Iowa, Iowa City, IA; 1970 (with High Distinction)  

E-Print Network (OSTI)

Stimulation of Anaerobic Digestion," Water Research, 17, 677 (1983). 11. Hergenroeder, R. and Parkin, G of Anaerobic Toxicity by Batch and Semi-Continuous Assays," Jour. Water Pollution Control Fed., 52, 720 (1980 Anaerobic Reactors: Response to Toxic Substances," Water Science and Tech., 15, 261 (1983). #12;2 13.

Stanier, Charlie

426

50,000-Watt AM Stations IA | MB | MI | MN | NE | ND | ON | SD | WI | Station News | Owners | TV Captures | Links  

E-Print Network (OSTI)

2) and the concentration of 65Cu2+ estimated by the speciation model WHAM (1.0 (28)), we could]e^ equals zero and that [65 Cu2+ ] was constant (i.e., nominal [65 Cu2+ ] ) 5.2-µg L-1). That is, WHAM the speciation model WHAM (28) assuming that the lake water has a pH near 8 (30), a dissolved organic carbon

Allen, Gale

427

IEEE IAS Annual Meeting, Oct. 6-10, 1996, San Diego, CA, pp. 2333-2339 Survey of Harmonics Measurements in Electrical Distribution Systems  

E-Print Network (OSTI)

be 1.0 [7]. Form Factor I I RMS _ = 1 (5) Symmetrical components is a mathematical tool used to analyze of several buildings in the three Department of Energy (DOE) Oak Ridge plants in Tennessee has yielded), variable frequency drives, switch mode power supplies, and uninterruptible power supplies. A discussion

Tolbert, Leon M.

428

Bell L a b s , NE C Re s e ar ch I n stit u t e a nd Telco r d ia ... - CECM  

E-Print Network (OSTI)

i nfo r m ation doe s no t t ell u s t he loc ation of t he co rr e sp ond i ng f ra gmen t on t he tar ge t D N A , only s ome t h i ng a bou t t he r el ative o r de r of t he...

429

Targeted Energy Efficiency Expert Evaluation (E4) Report: Iowa City Federal Building and U.S. Post Office, Iowa City, IA  

SciTech Connect

Final report summarizing Targeted E4 measures and energy savings analysis for the Iowa City Federal Building and Post Office.

Goddard, James K.; Fernandez, Nicholas; Underhill, Ronald M.; Gowri, Krishnan

2013-03-01T23:59:59.000Z

430

Lawrence Livermore National Laboratory Federal Facility Agreement, June 29, 1992 Summary  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site 300) Site 300) Agreement Name Lawrence Livermore National Laboratory Federal Facility Agreement Under CERCLA Section 120, June 29, 1992 State California Agreement Type Federal Facility Agreement Legal Driver(s) CERCLA Scope Summary Establish a procedural framework and schedule for developing, implementing, and monitoring appropriate response actions at the Site Parties DOE; USEPA; California Department of Toxic Substances Control; Central Valley Regional Water Quality Control Board Date 6/29/1992 SCOPE * Establish a procedural framework and schedule for developing, implementing, and monitoring appropriate response actions at the Site. * Identify operable units (OUs) which are appropriate at the Site prior to the implementation of final remedial action(s).

431

Livermore energy policy model and projections of energy futures for the Gas Research Institute  

Science Conference Proceedings (OSTI)

The Energy and Resource Planning Group at the Lawrence Livermore National Laboratory (LLNL) was asked by the Gas Research Institute to evaluate ten of their research projects relative to proposed funding levels for 1982. These energy technology projects included gas from unconventional and synthetic sources as well as utilization technologies. The primary tool used in the evaluation was the LLNL Energy Policy Model (EPM). The report gives background information about the study, the basic assumptions used in the study, and some conclusions, and presents selected supporting results from the EPM runs.

Castleton, R.

1981-06-01T23:59:59.000Z

432

14 MeV neutron work at the Lawrence Livermore National Laboratory  

SciTech Connect

The 14 MeV neutron work at Lawrence Livermore National Laboratory (LLNL) covers two main areas of interest to this Symposium: (1) measurements and calculations of differential cross sections; and (2) integral measurements of the neutron and gamma emission spectra. In both areas a large number of materials have been studied, spanning a wide mass range (6 < A < 239), of interest to fusion and hybrid reactors. In this presentation a brief description of the experimental techniques and calculational analysis is given for each of the above areas and the measured and calculated cross sections are discussed. 28 refs., 7 figs., 3 tabs.

Hansen, L.F.

1985-07-01T23:59:59.000Z

433

Lawrence Livermore National Laboratory Emergency Response Capability 2009 Baseline Needs Assessment Performance Assessment  

Science Conference Proceedings (OSTI)

This document was prepared by John A. Sharry, LLNL Fire Marshal and Division Leader for Fire Protection and was reviewed by Sandia/CA Fire Marshal, Martin Gresho. This document is the second of a two-part analysis of Emergency Response Capabilities of Lawrence Livermore National Laboratory. The first part, 2009 Baseline Needs Assessment Requirements Document established the minimum performance criteria necessary to meet mandatory requirements. This second part analyses the performance of Lawrence Livermore Laboratory Emergency Management Department to the contents of the Requirements Document. The document was prepared based on an extensive review of information contained in the 2004 BNA, a review of Emergency Planning Hazards Assessments, a review of building construction, occupancy, fire protection features, dispatch records, LLNL alarm system records, fire department training records, and fire department policies and procedures. On October 1, 2007, LLNL contracted with the Alameda County Fire Department to provide emergency response services. The level of service called for in that contract is the same level of service as was provided by the LLNL Fire Department prior to that date. This Compliance Assessment will evaluate fire department services beginning October 1, 2008 as provided by the Alameda County Fire Department.

Sharry, J A

2009-12-30T23:59:59.000Z

434

Site safety plan for Lawrence Livermore National Laboratory CERCLA investigations at site 300. Revision 2  

SciTech Connect

Various Department of Energy Orders incorporate by reference, health and safety regulations promulgated by the Occupational Safety and Health Administration (OSHA). One of the OSHA regulations, 29 CFR 1910.120, Hazardous Waste Operations and Emergency Response, requires that site safety plans are written for activities such as those covered by work plans for Site 300 environmental investigations. Based upon available data, this Site Safety Plan (Plan) for environmental restoration has been prepared specifically for the Lawrence Livermore National Laboratory Site 300, located approximately 15 miles east of Livermore, California. As additional facts, monitoring data, or analytical data on hazards are provided, this Plan may need to be modified. It is the responsibility of the Environmental Restoration Program and Division (ERD) Site Safety Officer (SSO), with the assistance of Hazards Control, to evaluate data which may impact health and safety during these activities and to modify the Plan as appropriate. This Plan is not `cast-in-concrete.` The SSO shall have the authority, with the concurrence of Hazards Control, to institute any change to maintain health and safety protection for workers at Site 300.

Kilmer, J.

1997-08-01T23:59:59.000Z

435

GAO-04-986R Lawrence Livermore National Laboratory: Further Improvements Needed to Strengthen Controls Over the Purchase Card Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6R LLNL Purchase Card Controls 6R LLNL Purchase Card Controls United States Government Accountability Office Washington, DC 20548 August 6, 2004 Congressional Requesters Subject: Lawrence Livermore National Laboratory: Further Improvements Needed to Strengthen Controls Over the Purchase Card Program The Lawrence Livermore National Laboratory (LLNL) located in Livermore, California is a government-owned, contractor-operated national laboratory of the Department of Energy's (DOE) National Nuclear Security Administration (NNSA). 1 The University of California manages the lab under a cost-reimbursable contract with NNSA. The university is paid a management fee to operate the lab and is reimbursed for all allowable costs charged to the contract. During the fall of 2002, the Federal Bureau of Investigation began investigating two

436

Allocation of Direct and Indirect Costs … Cost Accounting Standard 418 … at Lawrence Livermore National Laboratory, OAS-L-13-07  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Allocation of Direct and Indirect Allocation of Direct and Indirect Costs - Cost Accounting Standard 418 - at Lawrence Livermore National Laboratory OAS-L-13-07 April 2013 Department of Energy Washington, DC 20585 April 11, 2013 MEMORANDUM FOR THE MANAGER, LIVERMORE SITE OFFICE FROM: Rickey R. Hass Deputy Inspector General for Audits and Inspections Office of Inspector General SUBJECT: INFORMATION: Audit Report on the "Allocation of Direct and Indirect Costs - Cost Accounting Standard 418 - at Lawrence Livermore National Laboratory" BACKGROUND The attached report presents the results of the audit of Lawrence Livermore National Laboratory's (Livermore) Allocation of Direct and Indirect Costs - Cost Accounting Standard 418, conducted to address the performance audit objective described below. The Office of

437

Livermore, Los Alamos Team for Artificial Retina Project to Help Restore Vision for Many  

NLE Websites -- All DOE Office Websites (Extended Search)

9 9 6 www.federallabs.org Livermore, Los Alamos Team for Artificial Retina Project to Help Restore Vision for Many signals in the eye that the brain uses to create a visual image. As a core member of the team, Los Alamos National Laboratory is developing and applying techniques for the functional imaging of physiological and prosthetic stimulation in neural tissue to characterize information encoding and processing by the retina and to validate the efficacy of electrical stimulation. Coupled experimental studies and computer simulations are being used to investigate the biophysical and physiological properties of retinal neuronal tissue. In clinical trials, patients with vision loss were able to successfully identify objects, increase mobility, and

438

Remedial investigation of the High-Explosives (HE) Process Area, Lawrence Livermore National Laboratory Site 300  

Science Conference Proceedings (OSTI)

This report presents the results of a Remedial Investigation (RI) to define the extent of high explosives (HE) compounds and volatile organic compounds (VOCs) found in the soil, rocks, and ground water of the HE Process Area of Lawrence Livermore National Laboratory's (LLNL) Site 300 Facility. The report evaluates potential public health environmental risks associated with these compounds. Hydrogeologic information available before February 15, 1990, is included; however, chemical analyses and water-level data are reported through March 1990. This report is intended to assist the California Regional Water Quality Control Board (RWQCB)--Central Valley Region and the US Environmental Protection Agency (EPA) in evaluating the extent of environmental contamination of the LLNL HE Process Area and ultimately in designing remedial actions. 90 refs., 20 figs., 7 tabs.

Crow, N.B.; Lamarre, A.L.

1990-08-01T23:59:59.000Z

439

Reducing the solid waste stream: reuse and recycling at Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

In Fiscal Year (FY) 1996 Lawrence Livermore National Laboratory (LLNL) increased its solid waste diversion by 365 percent over FY 1992 in five solid waste categories - paper, cardboard, wood, metals, and miscellaneous. (LLNL`s fiscal year is from October 1 to September 30.) LLNL reused/ recycled 6,387 tons of waste, including 340 tons of paper, 455 tons of scrap wood, 1,509 tons of metals, and 3,830 tons of asphalt and concrete (Table1). An additional 63 tons was diverted from landfills by donating excess food, selling toner cartridges for reconditioning, using rechargeable batteries, redirecting surplus equipment to other government agencies and schools, and comporting plant clippings. LLNL also successfully expanded its demonstration program to recycle and reuse construction and demolition debris as part of its facility-wide, comprehensive solid waste reduction programs.

Wilson, K. L.

1997-08-01T23:59:59.000Z

440

Lawrence Livermore pulsed sphere benchmark analysis of MCNP{trademark} ENDF/B-VI  

Science Conference Proceedings (OSTI)

Twenty-eight Lawrence Livermore pulsed sphere experiments were modeled using MCNP for the purpose of bench- marking the new MCNP ENDF/B-VI data library. The twenty-eight pulsed sphere experiments contain thirty-four of the 124 isotopic or elemental evaluations contained in the new ENDF/B-VI set. The ENDF/B-VI results are compared to experimental neutron time-of-flight data, the results obtained from using ENDF/B-V, and against an additional data set, the MCNP Recommended Library, which includes Los Alamos group T-2 evaluations. The results show that ENDF/B-VI results give better or comparable results in comparison to experiment to ENDF/B-V in many cases, and do not deviate grossly in the other cases.

Court, J.D.; Brockhoff, R.C.; Hendricks, J.S.

1994-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "livermore ia ia" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Title I conceptual design for Pit 6 landfill closure at Lawrence Livermore National Laboratory Site 300  

Science Conference Proceedings (OSTI)

The objective of this design project is to evaluate and prepare design and construction documents for a closure cover cap for the Pit 6 Landfill located at Lawrence Livermore National Laboratory Site 300. This submittal constitutes the Title I Design (Conceptual Design) for the closure cover of the Pit 6 Landfill. A Title I Design is generally 30 percent of the design effort. Title H Design takes the design to 100 percent complete. Comments and edits to this Title I Design will be addressed in the Title II design submittal. Contents of this report are as follows: project background; design issues and engineering approach; design drawings; calculation packages; construction specifications outline; and construction quality assurance plan outline.

MacDonnell, B.A.; Obenauf, K.S. [Golder Associates, Inc., Alameda, CA (United States)

1996-08-01T23:59:59.000Z

442

Correlation between predicted and observed levels of airborne tritium at Lawrence Livermore Laboratory site boundary  

Science Conference Proceedings (OSTI)

At the Lawrence Livermore Laboratory, a computer code based on the Gaussian plume model is used to estimate radiation doses from routine or accidental release of airborne radioactive material. Routine releases of tritium have been used as a test of the overall uncertainty associated with these estimates. The ration of concentration to release rate at distances from the two principal release points to each of six site boundary sampling locations has been calcuated using local meteorological data. The concentration of airborne tritiated water vapor is continuously measured at the six sampling stations as part of the Laboratory's environmental monitoring program. Comparison of predicted with observed annual tritiated water concentrations in 1978 showed an average ratio of 2.6 with a range of from 0.97 to 5.8.

Lindeken, C.L.; Silver, W.J.; Toy, A.J.; White, J.H.

1980-02-19T23:59:59.000Z

443

Systems Studies Department FY 78 activity report. Volume 2. Systems analysis. [Sandia Laboratories, Livermore  

DOE Green Energy (OSTI)

The Systems Studies Department at Sandia Laboratories Livermore (SLL) has two primary responsibilities: to provide computational and mathematical services and to perform systems analysis studies. This document (Volume 2) describes the FY Systems Analysis highlights. The description is an unclassified overview of activities and is not complete or exhaustive. The objective of the systems analysis activities is to evaluate the relative value of alternative concepts and systems. SLL systems analysis activities reflect Sandia Laboratory programs and in 1978 consisted of study efforts in three areas: national security: evaluations of strategic, theater, and navy nuclear weapons issues; energy technology: particularly in support of Sandia's solar thermal programs; and nuclear fuel cycle physical security: a special project conducted for the Nuclear Regulatory Commission. Highlights of these activities are described in the following sections. 7 figures. (RWR)

Gold, T.S.

1979-02-01T23:59:59.000Z

444

DOE - Office of Legacy Management -- Iowa State University Ames Laboratory  

Office of Legacy Management (LM)

Iowa State University Ames Iowa State University Ames Laboratory - IA 01 FUSRAP Considered Sites Site: Iowa State University Ames Laboratory (IA.01 ) Eliminated from further consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: Wallace Road , Ames , Iowa IA.01-1 IA.01-2 Evaluation Year: Circa 1985 IA.01-3 Site Operations: Produced uranium and thorium metal, recovered uranium scrap, and conducted studies and experimental investigations in connection with chemistry and metallurgy of natural uranium and its allied forms. IA.01-1 IA.01-4 IA.01-5 IA.01-6 IA.01-7 Site Disposition: Eliminated - Referred to Chicago Operations Office for appropriate action IA.01-6 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium, Thorium IA.01-1

445

--No Title--  

NLE Websites -- All DOE Office Websites (Extended Search)

Diversity of Type Ia Supernovae in the Near-Infrared Eric Hsiao University of Victoria ABSTRACT The photometric studies of Type Ia supernovae (SNe Ia) in the optical have...

446

Livermore's 2004 R&D 100 Awards: Magnetically Levitated Train Takes Flight  

DOE Green Energy (OSTI)

the 1960s, transportation industry planners have sought an energy-efficient design for a train that can glide through air at speeds up to 500 kilometers per hour. This type of train, called a magnetically levitated (maglev) train, is thought to be a viable solution to meet the nation's growing need for intercity and urban transportation networks. However, despite some promising developments, unresolved concerns with the operation and safety of maglev trains has prevented the transition from demonstration model to commercial development. Inductrack, a maglev system originally conceived by Livermore physicist Richard Post, is designed to address these issues. Post's work on Inductrack began with funding from Livermore's Laboratory Directed Research and Development Program, and in 2003, the technology was licensed to General Atomics (GA) in San Diego for train and transit system applications. This year, members of the Livermore-GA team received an R&D 100 Award for Inductrack's development. Inductrack uses permanent magnets to produce the magnetic fields that levitate the train and provides economic and operational advantages over other maglev systems. It can be adapted to both high-speed and urban-speed environments. In the event of a power failure, the train slows gradually until it comes to rest on its auxiliary wheels. The maintenance requirements for Inductrack are also lower than they are for other systems, plus it has a short turning radius and is designed for quiet operation. Previous designs for maglev systems did not offer the energy efficiency or safety protections that are in the Inductrack design. Electromagnetic systems (EMS) use powered electromagnets to levitate the train. However, these systems are based on magnetic attraction rather than repulsion and thus are inherently unstable. In EMS trains, the levitation gap--the separation between the magnet pole faces and the iron rail--is only about 10 millimeters and, during operation, must be maintained to within {+-}1 millimeter. Position sensors and electronic feedback systems are required to control the magnetic current and to compensate for the inherent instability. This requirement, plus the onboard source of emergency power required to ensure operational safety during a sudden power loss, increases the complexity of EMS trains. In contrast, in electrodynamic systems (EDS), large superconducting magnet coils mounted on the sides of the train generate high-intensity magnetic field poles. Interaction of the current between the coils and the track levitates the train. At operating speeds (above a liftoff speed of about 100 kilometers per hour), the magnetic levitation force balances the weight of the car at a stable position. EDS trains do not require the feedback control systems that EMS trains use to stabilize levitation. However, the superconducting magnetic coils must be kept at temperatures of only 5 kelvins, so costly electrically powered cryogenic equipment is required. Also, passengers, especially those with pacemakers, must be shielded from the high magnetic fields generated by the superconductors.

Hazi, A

2005-09-20T23:59:59.000Z

447

Evaluation of Cavity Collapse and Surface Crater Formation for Selected Lawrence Livermore National Laboratory Tests - 2011  

SciTech Connect

This report evaluates collapse evolution for selected Lawrence Livermore National Laboratory (LLNL) underground nuclear tests at the Nevada National Security Site (NNSS, formerly called the Nevada Test Site). The work is being done at the request of National Security Technologies, LLC (NSTec) and supports the Department of Energy, National Nuclear Security Administration for the Nevada Site Office Borehole Management Program (BMP). The primary objective of this program is to close (plug) weapons program legacy boreholes that are deemed no longer useful. Safety decisions must be made before a crater area, or potential crater area, can be reentered for any work. Our statements on cavity collapse and crater formation are input into their safety decisions. The BMP is an on-going program to address hundreds of boreholes at the NTS. Each year NSTec establishes a list of holes to be addressed. They request the assistance of the Lawrence Livermore National Laboratory and Los Alamos National Laboratory Containment Programs to provide information related to the evolution of collapse history and make statements on completeness of collapse as relates to surface crater stability. These statements do not include the effects of erosion that may modify the collapse craters over time. They also do not address possible radiation dangers that may be present. Subject matter experts from the LLNL Containment Program who had been active in weapons testing activities performed these evaluations. Information used included drilling and hole construction, emplacement and stemming, timing and sequence of the selected test and nearby tests, geology, yield, depth of burial, collapse times, surface crater sizes, cavity and crater volume estimations, ground motion, and radiological release information. Both classified and unclassified data were reviewed. Various amounts of information are available for these tests, depending on their age and other associated activities. Lack of data can hamper evaluations and introduce uncertainty. We make no attempt to quantify this uncertainty. The following unclassified summary statements describe collapse evolution and crater stability in response to a recent request to review 3 LLNL test locations in areas 2 and 12: Kennebec in U2af, Cumberland in U2e, and Yuba in U12b.10.

Pawloski, G A

2011-02-28T23:59:59.000Z

448

DOE - Office of Legacy Management -- Ames Laboratory Research...  

Office of Legacy Management (LM)

Ames Laboratory Research Reactor Facility - IA 03 FUSRAP Considered Sites Site: Ames Laboratory Research Reactor Facility (IA.03) Designated Name: Alternate Name: Location:...

449

Lawrence Livermore: News and Public Affairs: News and Media: NR-04-02-01  

NLE Websites -- All DOE Office Websites (Extended Search)

Social Media Logos Follow LLNL on YouTube Subscribe to LLNL's RSS feed Follow LLNL on Facebook Follow LLNL on Twitter Follow LLNL on Flickr Social Media Logos Follow LLNL on YouTube Subscribe to LLNL's RSS feed Follow LLNL on Facebook Follow LLNL on Twitter Follow LLNL on Flickr Contact: Anne M. Stark Phone:(925) 422-9799 E-mail: stark8@llnl.gov FOR IMMEDIATE RELEASE Date: February 2, 2004 NR-04-02-01 Livermore Scientists Team With Russia To Discover Elements 113 and 115 A calcium-48 ion is accelerated to a high velocity in a cyclotron and directed at an americium-243 target. (300 dpi) One of the numerous americium-243 target atoms with a nucleus of protons and neutrons surrounded by an electron cloud. (300 dpi) An accelerated calcium-48 ion and an americium-243 target atom just before they collide. (300 dpi) The moment of collision between an accelerated calcium-48 ion and an americium-243 target atom.

450

Initial ultraviolet-B intensity data at Lawrence Livermore National Laboratory  

SciTech Connect

A measurement of UV-B reaching the ground has been established at the Lawrence Livermore National Laboratory. The instrument is the same as those operated by the National Institute for Water and Atmospheric Research in their network in New Zealand. The wavelength response of the radiometer is similar to the response of human skin to UV-B. Intensity data are collected by averaging meter readings over 10 minutes from 6:00 am to 6:00 pm Pacific Standard Time, then converting to effective UV-B intensity normalized at 310 nm. This report checks the intensities obtained at LLNL from November 1992 to July 1993 against the expected results: Increased solar zenith angle, whether from the daily cycle or from the yearly cycle in solar position, should decrease UV-B intensity at the ground due to increased optical path; and, intervening cloud cover should decrease ground UV-B intensity. Three additional findings are reported here: Maximum UV-B intensity on cloudless days does not always follow a smooth curve, but instead varies either high or low to some extent; Morning UV-B intensities are less than those in the afternoon at comparable solar zenith angles at certain times of year; LLNL wintertime daily-averaged UV-B intensities are somewhat higher than those observed at Auckland, New Zealand in their winter of 1992.

Patten, K.O. Jr.; Wuebbles, D.J. [Lawrence Livermore National Lab., CA (United States); Smith, G.J. [New Zealand Inst. for Industrial Research and Development, Lower Hutt (New Zealand)

1993-10-01T23:59:59.000Z

451

Lawrence Livermore National Laboratory underground coal gasification data base. [US DOE-supported field tests; data  

SciTech Connect

The Department of Energy has sponsored a number of field projects to determine the feasibility of converting the nation's vast coal reserves into a clean efficient energy source via underground coal gasification (UCG). Due to these tests, a significant data base of process information has developed covering a range of coal seams (flat subbituminous, deep flat bituminous and steeply dipping subbituminous) and processing techniques. A summary of all DOE-sponsored tests to data is shown. The development of UCG on a commercial scale requires involvement from both the public and private sectors. However, without detailed process information, accurate assessments of the commercial viability of UCG cannot be determined. To help overcome this problem the DOE has directed the Lawrence Livermore National Laboratory (LLNL) to develop a UCG data base containing raw and reduced process data from all DOE-sponsored field tests. It is our intent to make the data base available upon request to interested parties, to help them assess the true potential of UCG.

Cena, R. J.; Thorsness, C. B.

1981-08-21T23:59:59.000Z

452

Routine environmental audit of the Sandia National Laboratories, California, Livermore, California  

Science Conference Proceedings (OSTI)

This report documents the results of the Routine Environmental Audit of the Sandia National Laboratories, Livermore, California (SNL/CA). During this audit the activities the Audit Team conducted included reviews of internal documents and reports from preview audits and assessments; interviews with US Department of Energy (DOE), State of California regulators, and contractor personnel; and inspections and observations of selected facilities and operations. The onsite portion of the audit was conducted from February 22 through March 4, 1994, by the DOE Office of Environmental Audit (EH-24), located within the Office of Environment, Safety, and Health (EH). The audit evaluated the status of programs to ensure compliance with Federal, state, and local environmental laws and regulations; compliance with DOE Orders, guidance, and directives; and conformance with accepted industry practices and standards of performance. The audit also evaluated the status and adequacy of the management systems developed to address environmental requirements. The audit`s functional scope was comprehensive and included all areas of environmental management and a programmatic evaluation of NEPA and inactive waste sites.

Not Available

1994-03-01T23:59:59.000Z

453

Screening Program Reduced Melanoma Mortality at the Lawrence Livermore National Laboratory, 1984-1996  

SciTech Connect

Worldwide incidence of cutaneous malignant melanoma has increased substantially, and no screening program has yet demonstrated reduction in mortality. We evaluated the education, self examination and targeted screening campaign at the Lawrence Livermore National Laboratory (LLNL) from its beginning in July 1984 through 1996. The thickness and crude incidence of melanoma from the years before the campaign were compared to those obtained during the 13 years of screening. Melanoma mortality during the 13-year period was based on a National Death Index search. Expected yearly deaths from melanoma among LLNL employees were calculated by using California mortality data matched by age, sex, and race/ethnicity and adjusted to exclude deaths from melanoma diagnosed before the program began or before employment at LLNL. After the program began, crude incidence of melanoma thicker than 0.75 mm decreased from 18 to 4 cases per 100,000 person-years (p = 0.02), while melanoma less than 0.75mm remained stable and in situ melanoma increased substantially. No eligible melanoma deaths occurred among LLNL employees during the screening period compared with a calculated 3.39 expected deaths (p = 0.034). Education, self examination and selective screening for melanoma at LLNL significantly decreased incidence of melanoma thicker than 0.75 mm and reduced the melanoma-related mortality rate to zero. This significant decrease in mortality rate persisted for at least 3 yr after employees retired or otherwise left the laboratory.

Schneider, MD, J S; II, PhD, D; MD, PhD, M

2006-10-12T23:59:59.000Z

454

Summary Report of Summer 2009 NGSI Human Capital Development Efforts at Lawrence Livermore National Laboratory  

SciTech Connect

In 2009, Lawrence Livermore National Laboratory (LLNL) engaged in several activities to support NA-24's Next Generation Safeguards Initiative (NGSI). This report outlines LLNL's efforts to support Human Capital Development (HCD), one of five key components of NGSI managed by Dunbar Lockwood in the Office of International Regimes and Agreements (NA-243). There were five main LLNL summer safeguards HCD efforts sponsored by NGSI: (1) A joint Monterey Institute of International Studies/Center for Nonproliferation Studies-LLNL International Safeguards Policy and Information Analysis Course; (2) A Summer Safeguards Policy Internship Program at LLNL; (3) A Training in Environmental Sample Analysis for IAEA Safeguards Internship; (4) Safeguards Technology Internships; and (5) A joint LLNL-INL Summer Safeguards Lecture Series. In this report, we provide an overview of these five initiatives, an analysis of lessons learned, an update on the NGSI FY09 post-doc, and an update on students who participated in previous NGSI-sponsored LLNL safeguards HCD efforts.

Dougan, A; Dreicer, M; Essner, J; Gaffney, A; Reed, J; Williams, R

2009-11-16T23:59:59.000Z

455

Physical and chemical sensor technologies developed at Lawrence Livermore National Laboratory  

Science Conference Proceedings (OSTI)

The increasing emphasis on envirorunental issues, waste reduction, and improved efficiency for industrial processes has mandated the development of new chemical and physical sensors for field or in-plant use. The Lawrence Livermore National Laboratory (LLNL) has developed a number of technologies for sensing physical and chemical properties. Table 1 gives some examples of several sensors. that have been developed recently for environmental, industrial, commercial or government applications. Physical sensors of pressure, temperature, acceleration, acoustic vibration spectra, and ionizing radiation have been developed. Sensors developed at LLNL for chemical species include inorganic solvents, heavy metal ions`, and gaseous atoms and compounds. Primary sensing technologies we have employed have been based on optical fibers, semiconductor optical or radiation detectors, electrochemical activity, micromachined electromechanical (MEMs) structures, or chemical separation technologies. The complexities of these sensor systems range from single detectors to more advanced micro-instruments on-a-chip. For many of the sensors we have developed the necessary intelligent electronic support systems for both local and remote sensing applications. Each of these sensor technologies are briefly described in the remaining sections of this paper.

Balch, J.W.; Ciarlo, D.; Folta, J.; Glass, R.; Hagans, K.; Milanovich, F.; Sheem, S.

1993-08-10T23:59:59.000Z

456

Estimating The Reliability of the Lawrence Livermore National Laboratory (LLNL) Flash X-ray (FXR) Machine  

Science Conference Proceedings (OSTI)

At Lawrence Livermore National Laboratory (LLNL), our flash X-ray accelerator (FXR) is used on multi-million dollar hydrodynamic experiments. Because of the importance of the radiographs, FXR must be ultra-reliable. Flash linear accelerators that can generate a 3 kA beam at 18 MeV are very complex. They have thousands, if not millions, of critical components that could prevent the machine from performing correctly. For the last five years, we have quantified and are tracking component failures. From this data, we have determined that the reliability of the high-voltage gas-switches that initiate the pulses, which drive the accelerator cells, dominates the statistics. The failure mode is a single-switch pre-fire that reduces the energy of the beam and degrades the X-ray spot-size. The unfortunate result is a lower resolution radiograph. FXR is a production machine that allows only a modest number of pulses for testing. Therefore, reliability switch testing that requires thousands of shots is performed on our test stand. Study of representative switches has produced pre-fire statistical information and probability distribution curves. This information is applied to FXR to develop test procedures and determine individual switch reliability using a minimal number of accelerator pulses.

Ong, M M; Kihara, R; Zentler, J M; Kreitzer, B R; DeHope, W J

2007-06-27T23:59:59.000Z

457

Investigating Sources of Toxicity in Stormwater: Algae Mortality in Runoff Upstream of the Lawrence Livermore National Laboratory  

SciTech Connect

A source evaluation case study is presented for observations of algae toxicity in an intermittent stream passing through the Lawrence Livermore National Laboratory near Livermore, California. A five-step procedure is discussed to determine the cause of water toxicity problems and to determine appropriate environmental management practices. Using this approach, an upstream electrical transfer station was identified as the probable source of herbicides causing the toxicity. In addition, an analytical solution for solute transport in overland flow was used to estimate the application level of 40 Kg/ha. Finally, this source investigation demonstrates that pesticides can impact stream water quality regardless of application within levels suggested on manufacturer labels. Environmental managers need to ensure that pesticides that could harm aquatic organisms (including algae) not be used within close proximity to streams or storm drainages and that application timing should be considered for environmental protection.

Campbell, C G; Folks, K; Mathews, S; Martinelli, R

2003-10-06T23:59:59.000Z