Powered by Deep Web Technologies
Note: This page contains sample records for the topic "irradiance nasa surface" 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

NASA Surface meteorology and Solar Energy: Methodology  

E-Print Network [OSTI]

1 NASA Surface meteorology and Solar Energy: Methodology Energy Technology (RET) projects. These climatological profiles are used for designing systems that have for implementing RETs, there are inherent problems in using them for resource assessment. Ground measurement

Firestone, Jeremy

2

NASA-Surface Meteorology and Solar Energy | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories onFocus Area EnergyMohawkaccrediationNASA-Surface Meteorology and

3

Origins of ion irradiation-induced Ga nanoparticle motion on GaAs surfaces  

SciTech Connect (OSTI)

We have examined the origins of ion irradiation-induced nanoparticle (NP) motion. Focused-ion-beam irradiation of GaAs surfaces induces random walks of Ga NPs, which are biased in the direction opposite to that of ion beam scanning. Although the instantaneous NP velocities are constant, the NP drift velocities are dependent on the off-normal irradiation angle, likely due to a difference in surface non-stoichiometry induced by the irradiation angle dependence of the sputtering yield. It is hypothesized that the random walks are initiated by ion irradiation-induced thermal fluctuations, with biasing driven by anisotropic mass transport.

Kang, M.; Wu, J. H.; Chen, H. Y.; Thornton, K.; Goldman, R. S. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States)] [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States); Sofferman, D. L. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States) [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States); Department of Physics, Adelphi University, Garden City, New York 11530-0701 (United States); Beskin, I. [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)] [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)

2013-08-12T23:59:59.000Z

4

20th century changes in surface solar irradiance in simulations and observations  

E-Print Network [OSTI]

20th century changes in surface solar irradiance in simulations and observations A. Romanou,1 B December 2006; accepted 5 February 2007; published 8 March 2007. [1] The amount of solar irradiance reaching the surface is a key parameter in the hydrological and energy cycles of the Earth's climate. We

5

Use of OCA and APOLLO in Heliosat-4 method for the assessment of surface downwelling solar irradiance  

E-Print Network [OSTI]

the German Aerospace Center (DLR), for the assessment of surface downwelling solar irradiance (SSI). Each-based assessments of surface downwelling solar irradiance (SSI) are more and more used in the domain of solar energy, diffuse and direct surface irradiance for use in various domains: solar energy, biomass, agriculture

Paris-Sud XI, Université de

6

EPR Study of the Surface Characteristics of Nanostructured TiO2 under UV Irradiation  

E-Print Network [OSTI]

EPR Study of the Surface Characteristics of Nanostructured TiO2 under UV Irradiation Juan M of EPR spectroscopy. The samples of the H series present the smallest crystallite size and after

7

Solar irradiance changes and photobiological effects at Earth's surface following astrophysical ionizing radiation events  

E-Print Network [OSTI]

Astrophysical ionizing radiation events have been recognized as a potential threat to life on Earth, primarily through depletion of stratospheric ozone and subsequent increase in surface-level solar ultraviolet radiation. Simulations of the atmospheric effects of a variety of events (such as supernovae, gamma-ray bursts, and solar proton events) have been previously published, along with estimates of biological damage at Earth's surface. In this work, we employed the TUV radiative transfer model to expand and improve calculations of surface-level irradiance and biological impacts following an ionizing radiation event. We considered changes in surface-level UVB, UVA, and photosynthetically active radiation (visible light) for clear-sky conditions and fixed aerosol parameter values. We also considered a wide range of biological effects on organisms ranging from humans to phytoplankton. We found that past work overestimated UVB irradiance, but that relative estimates for increase in exposure to DNA damaging radi...

Thomas, Brian C; Snyder, Brock R

2015-01-01T23:59:59.000Z

8

2013 ISES Solar World Congress Review of satellite-based surface solar irradiation databases for  

E-Print Network [OSTI]

photovoltaic (PV) or thermal solar. This paper focuses on PV but can surely be extended to thermal solar technology such as concentrating solar power (CSP). PV project developers first need to identify2013 ISES Solar World Congress Review of satellite-based surface solar irradiation databases

Paris-Sud XI, Université de

9

The onset of optical breakdown in KrF-laser-irradiated silica glass surfaces  

E-Print Network [OSTI]

A synthetic fused silica obtained from Tosoh SGM Co., ESL-1000 (OH % 1200 wt. ppm), with a thick- ness of 2 mmThe onset of optical breakdown in KrF-laser-irradiated silica glass surfaces Y. Kawaguchia,* , A Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1

Dickinson, J. Thomas

10

Significant reduction of surface solar irradiance induced by aerosols in a suburban region in northeastern China  

E-Print Network [OSTI]

Significant reduction of surface solar irradiance induced by aerosols in a suburban region in northeastern China Xiangao Xia,1 Hongbin Chen,1 Zhanqing Li,1,2 Pucai Wang,1 and Jiankai Wang1 Received 25 May region in northeastern China. Aerosol properties derived from Sun photometer measurements and aerosol

Li, Zhanqing

11

Pump-probe imaging of laser-induced periodic surface structures after ultrafast irradiation of Si  

SciTech Connect (OSTI)

Ultrafast pump-probe microscopy has been used to investigate laser-induced periodic surface structure (LIPSS) formation on polished Si surfaces. A crater forms on the surface after irradiation by a 150 fs laser pulse, and a second, subsequent pulse forms LIPSS within the crater. Sequentially delayed images show that LIPSS with a periodicity slightly less than the fundamental laser wavelength of 780 nm appear on Si surfaces ?50 ps after arrival of the second pump laser pulse, well after the onset of melting. LIPSS are observed on the same timescale as material removal, suggesting that their formation involves material ejection.

Murphy, Ryan D. [Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States); Torralva, Ben [Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States); Adams, David P. [Sandia National Laboratories, Albuquerque, New Mexico 87123 (United States)] [Sandia National Laboratories, Albuquerque, New Mexico 87123 (United States); Yalisove, Steven M. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2013-09-30T23:59:59.000Z

12

Method using laser irradiation for the production of atomically clean crystalline silicon and germanium surfaces  

DOE Patents [OSTI]

This invention relates to a new method for removing surface impurities from crystalline silicon or germanium articles, such as off-the-shelf p- or n-type wafers to be doped for use as junction devices. The principal contaminants on such wafers are oxygen and carbon. The new method comprises laser-irradiating the contaminated surface in a non-reactive atmosphere, using one or more of Q-switched laser pulses whose parameters are selected to effect melting of the surface without substantial vaporization thereof. In a typical application, a plurality of pulses is used to convert a surface region of an off-the-shelf silicon wafer to an automatically clean region. This can be accomplished in a system at a pressure below 10.sup.-8 Torr, using Q-switched ruby-laser pulses having an energy density in the range of from about 60 to 190 MW/cm.sup.2.

Ownby, Gary W. (Knoxville, TN); White, Clark W. (Oak Ridge, TN); Zehner, David M. (Lenoir City, TN)

1981-01-01T23:59:59.000Z

13

Characterization of metal surfaces irradiated by a long-pulse KrF excimer laser  

SciTech Connect (OSTI)

Metallic samples were irradiated by a long-pulse ([tau] > 300 ns) KrF laser. The experiments were performed with an energy density of 0.3--120 J cm[sup [minus]2] and a power density of 1--400 MW cm[sup [minus]2]. The samples investigated were pure aluminum, aluminum alloy, low-alloy constructional steel and titanium alloy. They were polished to obtain a roughness of 10 < Ra < 0.08 [mu]m and stress-relief heat-treated for some residual stress measurements. The characterization of the irradiated metal surfaces was performed using scanning electron microscopy (SEM), roughness analyzers, a microhardness tester and X-ray diffraction (XRD) residual stress apparatus. The improvement or deterioration in the mechanical properties of the metallic samples and some potential applications are discussed.

Sarnet, T.; Montagne, J.E.; Inglesakis, G.; Autric, M. (Inst. of Fluid Mechanics, Marseille (France). Laser-Matter Interaction Group); Barrallier, L.; Barreau, G. (Ecole Nationale Superieure d'Arts et Metiers, Aix-en-Provence (France). Mecasurf Lab.)

1994-09-01T23:59:59.000Z

14

Could the Earth's surface Ultraviolet irradiance be blamed for the global warming? (II) ----Ozone layer depth reconstruction via HEWV effect  

E-Print Network [OSTI]

It is suggested by Chen {\\it et al.} that the Earth's surface Ultraviolet irradiance ($280-400$ nm) could influence the Earth's surface temperature variation by "Highly Excited Water Vapor" (HEWV) effect. In this manuscript, we reconstruct the developing history of the ozone layer depth variation from 1860 to 2011 based on the HEWV effect. It is shown that the reconstructed ozone layer depth variation correlates with the observational variation from 1958 to 2005 very well ($R=0.8422$, $P>99.9\\%$). From this reconstruction, we may limit the spectra band of the surface Ultraviolet irradiance referred in HEWV effect to Ultraviolet B ($280-320$ nm).

Chen, Jilong; Zheng, Yujun

2014-01-01T23:59:59.000Z

15

Surface effects and phase stability in metal oxides nanoparticles under visible irradiation  

SciTech Connect (OSTI)

The light induced phase transformation between stable phases of metal oxides nanoparticles is analyzed. The surrounding atmosphere as well as the defect density at the surface play a fundamental role. It has been found that in oxygen poor chamber atmosphere the phase transformation is favored, while the phase transition cannot be achieved if the defects at the surface are properly passivated. The phase transition is activated by intragap irradiation, able to activate the F- center at the surface connected to oxygen vacancies, and promoting the activation of the surface and the nucleation of neighboring crystallites. The phase transition was studied in Titanium oxide (TiO{sub 2}) and in Iron oxide (Fe{sub 2}O{sub 3}): Maghemite is subjected to a phase transformation to ??Fe{sub 2}O{sub 3} (hematite), Anatase nanoparticles converts to Rutile. The general mechanism of the phase transition and, more in general, the possibility to optically control the surface activity of metal oxides is discussed.

Ricci, Pier Carlo, E-mail: carlo.ricci@dsf.unica.it; Carbonaro, C. M., E-mail: carlo.ricci@dsf.unica.it; Corpino, R., E-mail: carlo.ricci@dsf.unica.it; Chiriu, D., E-mail: carlo.ricci@dsf.unica.it; Stagi, L., E-mail: carlo.ricci@dsf.unica.it [Dipartimento di Fisica, Universit degli Studi di Cagliari, S.P. Monserrato-Sestu Km 0,700, 09042 Monserrato (Canada) (Italy)

2014-10-21T23:59:59.000Z

16

Could the Earth's surface Ultraviolet irradiance be blamed for the global warming? A new effect may exist  

E-Print Network [OSTI]

Whether natural factors could interpret the rise of the Earth's surface temperature is still controversial. Though numerous recent researches have reported apparent correlations between solar activity and the Earth's climate, solar activity has encountered a big problem when describing the rapid global warming after 1970s. Our investigation shows the good positive correlations between the Earth's surface Ultraviolet irradiance (280-400 nm) and the Earth's surface temperature both in temporal and spatial variations by analyzing the global surface Ultraviolet irradiance (280-400 nm) and global surface temperature data from 1980-1999. The rise of CO$_2$ cannot interpret the good positive correlations, and we could even get an opposite result to the good correlations when employing the rise of CO$_2$ to describe the relation between them. Based on the good positive correlations, we suggest a new effect, named "Highly Excited Water Vapor" (HEWV) effect, which can interpret how the Sun influences the Earth's surfac...

Chen, Jilong; Zhao, Juan; Zheng, Yujun

2014-01-01T23:59:59.000Z

17

Simultaneous impact of neutron irradiation and sputtering on the surface structure of selfdamaged ITERgrade tungsten  

SciTech Connect (OSTI)

Simultaneous effects of neutron irradiation and longterm sputtering on the surface relief of ITERgrade tungsten were studied. The effects of neutroninduced displacement damage have been simulated by irradiation of tungsten target with W{sup 6+} ions of 20?MeV energy. Ar{sup +} ions with energy 600?eV were used as imitation of charge exchange atoms in ITER. The surface relief was studied after each sputtering act. The singularity in the WJIG surface relief was ascertained experimentally at the first time, which determines the law of roughness extension under sputtering. As follows from the experimental data, the neutron irradiation has not to make a decisive additional contribution in the processes developing under impact of charge exchange atoms only.

Belyaeva, A. I., E-mail: aibelyaeva@mail.ru; Savchenko, A. A. [National Technical University Kharkov Politechnical Institute, Kharkov, 61002 (Ukraine); Galuza, A. A.; Kolenov, I. V. [Institute of Electrophysics and Radiation Technologies, National Academy of Science of Ukraine, Kharkov, 61024 (Ukraine)

2014-07-15T23:59:59.000Z

18

Analysis of strained surface layers of ZnO single crystals after irradiation with intense femtosecond laser pulses  

SciTech Connect (OSTI)

Structural modifications of ZnO single crystals that were created by the irradiation with femtosecond laser pulses at fluences far above the ablation threshold were investigated with micro-Raman spectroscopy. After light-matter interaction on the femtosecond time scale, rapid cooling and the pronounced thermal expansion anisotropy of ZnO are likely to cause residual strains of up to 1.8% and also result in the formation of surface cracks. This process relaxes the strain only partially and a strained surface layer remains. Our findings demonstrate the significant role of thermoelastic effects for the irradiation of solids with intense femtosecond laser pulses.

Schneider, Andreas; Sebald, Kathrin; Voss, Tobias [Semiconductor Optics, Institute of Solid State Physics, University of Bremen, D-28359 Bremen (Germany)] [Semiconductor Optics, Institute of Solid State Physics, University of Bremen, D-28359 Bremen (Germany); Wolverson, Daniel [Nanoscience Group, Department of Physics, University of Bath, BA2 7AY Bath (United Kingdom)] [Nanoscience Group, Department of Physics, University of Bath, BA2 7AY Bath (United Kingdom); Hodges, Chris; Kuball, Martin [Center for Device Thermography and Reliability (CDTR), H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL (United Kingdom)] [Center for Device Thermography and Reliability (CDTR), H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL (United Kingdom)

2013-05-27T23:59:59.000Z

19

Formation of laser-induced periodic surface structures on fused silica upon two-color double-pulse irradiation  

SciTech Connect (OSTI)

The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of fused silica with multiple irradiation sequences consisting of laser pulse pairs (50 fs single-pulse duration) of two different wavelengths (400 and 800 nm) is studied experimentally. Parallel polarized double-pulse sequences with a variable delay ?t between ?10 and +10 ps and between the individual fs-laser pulses were used to investigate the LIPSS periods versus ?t. These two-color experiments reveal the importance of the ultrafast energy deposition to the silica surface by the first laser pulse for LIPSS formation. The second laser pulse subsequently reinforces the previously seeded spatial LIPSS frequencies.

Hhm, S.; Herzlieb, M.; Rosenfeld, A. [Max-Born-Institut fr Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Max-Born-Strae 2A, D-12489 Berlin (Germany)] [Max-Born-Institut fr Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Max-Born-Strae 2A, D-12489 Berlin (Germany); Krger, J.; Bonse, J. [BAM Bundesanstalt fr Materialforschung und prfung, Unter den Eichen 87, D-12205 Berlin (Germany)] [BAM Bundesanstalt fr Materialforschung und prfung, Unter den Eichen 87, D-12205 Berlin (Germany)

2013-12-16T23:59:59.000Z

20

Formation of laser-induced periodic surface structures on niobium by femtosecond laser irradiation  

SciTech Connect (OSTI)

The surface morphology of a Niobium sample, irradiated in air by a femtosecond laser with a wavelength of 800?nm and pulse duration of 100 fs, was examined. The period of the micro/nanostructures, parallel and perpendicularly oriented to the linearly polarized fs-laser beam, was studied by means of 2D Fast Fourier Transform analysis. The observed Laser-Induced Periodic Surface Structures (LIPSS) were classified as Low Spatial Frequency LIPSS (periods about 600?nm) and High Spatial Frequency LIPSS, showing a periodicity around 300?nm, both of them perpendicularly oriented to the polarization of the incident laser wave. Moreover, parallel high spatial frequency LIPSS were observed with periods around 100?nm located at the peripheral areas of the laser fingerprint and overwritten on the perpendicular periodic gratings. The results indicate that this method of micro/nanostructuring allows controlling the Niobium grating period by the number of pulses applied, so the scan speed and not the fluence is the key parameter of control. A discussion on the mechanism of the surface topology evolution was also introduced.

Pan, A.; Dias, A.; Gomez-Aranzadi, M.; Olaizola, S. M. [CIC microGUNE, Goiru Kalea 9 Polo Innovacin Garaia, 20500 Arrasate-Mondragn (Spain); CEIT-IK4 and Tecnun, University of Navarra, Manuel Lardizbal 15, 20018 San Sebastin (Spain); Rodriguez, A. [CIC microGUNE, Goiru Kalea 9 Polo Innovacin Garaia, 20500 Arrasate-Mondragn (Spain)

2014-05-07T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Assessment of Heliosat-4 surface solar irradiance derived on the basis of SEVIRI-APOLLO cloud products  

E-Print Network [OSTI]

high spatial and temporal resolutions, the APOLLO product is suitable for use in solar energy as their spectral distribution for the uses in various domains: solar energy, biomass, agriculture, human healthAssessment of Heliosat-4 surface solar irradiance derived on the basis of SEVIRI-APOLLO cloud

Boyer, Edmond

22

Oumbe A., Blanc Ph., Schroedter-Homscheidt M., Wald L., 2010. Solar surface irradiance from new meteorological satellite data. In Proceedings of the 29th  

E-Print Network [OSTI]

Tech, Center for Energy and Processes, BP 207, 06904 Sophia Antipolis, France b German Aerospace CenterOumbe A., Blanc Ph., Schroedter-Homscheidt M., Wald L., 2010. Solar surface irradiance from new, 320-328, doi:10.3233/978-1-60750-494-8-320 Solar surface irradiance from new meteorological satellite

Paris-Sud XI, Université de

23

Domain switching by electron beam irradiation of Z{sup +}-polar surface in Mg-doped lithium niobate  

SciTech Connect (OSTI)

The appearance of the static domains with depth above 200??m in the bulk of MgO-doped lithium niobate single crystals as a result of focused electron beam irradiation of Z{sup +}-polar surface was demonstrated. The created domain patterns were visualized by high-resolution methods including piezoresponse force microscopy, scanning electron microscopy, and confocal Raman microscopy. The main stages of the domain structure formation were revealed and explained in terms of the original model.

Shur, V. Ya., E-mail: vladimir.shur@urfu.ru; Chezganov, D. S.; Smirnov, M. M.; Alikin, D. O.; Neradovskiy, M. M.; Kuznetsov, D. K. [Institute of Natural Sciences, Ural Federal University, 620000 Ekaterinburg (Russian Federation)

2014-08-04T23:59:59.000Z

24

The role of an interface on Ni film removal and surface roughness after irradiation by femtosecond laser pulses  

SciTech Connect (OSTI)

We have observed thin film removal from glass substrates after the irradiation of Ni films with femtosecond laser pulses in air. It was found that the material removal threshold and laser-induced morphology are dependent on film thickness. With decreasing thickness, material removal transitions from intra-film separation to removal at the Ni-glass interface. The Gaussian energy distribution of the laser pulse allows for intra-film separation in the annular region of the crater and interface separation in the center. We propose a model to explain these data as well as the observed increased surface roughness in the interfacial removal regions.

Murphy, Ryan D. [Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States); Torralva, Ben [Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States); Yalisove, Steven M. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)] [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2013-05-06T23:59:59.000Z

25

Improved surface adhesion and coverage of perfluoropolyether lubricants following far-UV irradiation  

SciTech Connect (OSTI)

Far-UV treatment of a surface with a thin film of a perfluoropolyether improves adhesion and lowers surface free energy substantially compared to the unirradiated, lubricated surface. With 185-nm radiation, approximately one monolayer can be fixed to surfaces such as amorphous carbon, silica, and gold. These lubricated surfaces become extremely hydrophobic after UV treatment (advancing water contact angle increases about 65{degree} to {ge} 110{degree}) and are not removed by fluorinated solvents. In the absence of far-UV radiation, most perfluoropolyethers show poor adhesion to carbon and are removed easily by rinsing with fluorinated solvents.

Saperstein, D.D. (IBM General Products Div., San Jose, CA (USA)); Lin , L.J. (IBM Research Div., San Jose, CA (USA))

1990-09-01T23:59:59.000Z

26

NASA Academy Program Descriptions  

E-Print Network [OSTI]

NASA Academy Program Descriptions October 2010 #12;NASA Academy Program Descriptions 2011 October 11, 2010 1/5 NASA Academy at ARC, GRC, GSFC, and MSFC Websites: Ames: http://academy.arc.nasa.gov Glenn: http://academy.grc.nasa.gov Goddard: http://academy.gsfc.nasa.gov Marshall: http://academy

Wang, Z. Jane

27

Simple solar spectral model for direct and diffuse irradiance on horizontal and tilted planes at the earth's surface for cloudless atmospheres  

SciTech Connect (OSTI)

A new, simple model for calculating clear-sky direct and diffuse spectral irradiance on horizontal and tilted surfaces is presented. The model is based on previously reported simple algorithms and on comparisons with rigorous radiative transfer calculations and limited outdoor measurements. Equations for direct normal irradiance are outlined; and include: Raleigh scattering; aerosol scattering and absorption; water vapor absorption; and ozone and uniformly mixed gas absorption. Inputs to the model include solar zenith angle, collector tilt angle, atmospheric turbidity, amount of ozone and precipitable water vapor, surface pressure, and ground albedo. The model calculates terrestrial spectra from 0.3 to 4.0 ..mu..m with approximately 10 nm resolution. A major goal of this work is to provide researchers with the capability to calculate spectral irradiance for different atmospheric conditions and different collector geometries using microcomputers. A listing of the computer program is provided.

Bird, R.; Riordan, C.

1984-12-01T23:59:59.000Z

28

Sapphire (0 0 0 1) surface modifications induced by long-pulse 1054 nm laser irradiation  

E-Print Network [OSTI]

spectrum from ultraviolet to visible and near-infrared (0.2­2 mm), high resistance to abrasion, thermal. Loomis a a Physics Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA b Materials on the uncoated and coated surfaces. The individual damage effects of hotspots became less pronounced at high

Ma, Chi

29

Plasma-mediated surface evaporation of an aluminium target in vacuum under UV laser irradiation  

SciTech Connect (OSTI)

Mathematical simulation is employed to investigate the dynamics of evaporation and condensation on the surface of a metal target under the conditions of plasma production in the vaporised material exposed to the 0.248-{mu}m UV radiation of a KrF laser with the intensity G{sub 0}= 2x10{sup 8}-10{sup 9} W cm{sup -2}, and a pulse duration {tau}= 20 ns. A transient two-dimensional mathematical model is used, which includes, for the condensed medium, the heat conduction equation with the Stefan boundary condition and additional kinetic conditions at the evaporation surface and, for the vapour, the equations of radiative gas dynamics and laser radiation transfer supplemented with tabular data for the parameters of the equations of state and absorption coefficients. The target evaporation in vacuum induced by the UV radiation was found to occur during the laser pulse and is divided into two characteristic stages: initial evaporation with a sound velocity and subsonic evaporation after the plasma production. At the subsonic evaporation stage, one part of the laser radiation passes through the plasma and is absorbed by the target surface and another part is absorbed in a thin plasma layer near the surface to produce a high pressure, which significantly moderates the vapour ejection. After completion of the pulse, a part of the vaporised material is condensed on the surface, both in the evaporation region and some distance away from it due to the lateral expansion of the plasma cloud. (interaction of laser radiation with matter. laser plasma)

Mazhukin, V I; Nosov, V V [Institute of Mathematical Modelling, Russian Academy of Sciences, Moscow (Russian Federation)

2005-05-31T23:59:59.000Z

30

Effect of flux addition on the microstructure and hardness of TiC-reinforced ferrous surface composite layers fabricated by high-energy electron beam irradiation  

SciTech Connect (OSTI)

Surface composites reinforced with TiC particulates were fabricated by high-energy electron-beam irradiation. In order to investigate the effects of flux addition on the TiC dispersion in surface composite layers, four kinds of powder mixtures were made by mixing TiC with 5, 10, 20, and 40 wt% of the flux components (MgO-CaO). To fabricate TiC-reinforced surface composites, the TiC-flux mixtures were deposited evenly on a plain carbon steel substrate, which was subjected to electron-beam irradiation. Microstructural analysis was conducted using X-ray diffraction and Moessbauer spectroscopy as well as optical and scanning electron microscopy. The microstructure of the surface composites was composed of a melted region, an interfacial region, a coarse-grained heat-affected zone (HAZ), a fine-grained HAZ, and an unaltered original substrate region. TiC agglomerates and residual pores were found in the melted region of materials processed without flux, but the number of agglomerates and pores are significantly decreased in materials processed with a considerable amount of flux. As a result of irradiation, TiC particles were homogeneously distributed throughout the melted region of 2.5 mm in thickness, whose hardness was greatly increased. The optimum flux amount, which resulted in surface composites containing homogeneously dispersed TiC particles, was found to be in the range of 10 to 20% to obtain excellent surface composites.

Choo, S.H.; Lee, S.; Kwon, S.J.

1999-12-01T23:59:59.000Z

31

Periodic striations on beryllium and tungsten surfaces by indirect femtosecond laser irradiation  

SciTech Connect (OSTI)

Femtosecond laser pulses with ??=?800?nm were focused in air at one atmosphere and in deuterium (D) at low pressure. Submicron periodic structures were observed on surfaces made of Be, W and a mixture of Be-W immersed in these gases and placed nearly parallel with the laser beam, at 300??m from the focal spot. In air, no structures were observed on Be. For the Be-W mixture, the periodic structures were uniform and parallel when formed in D but irregular in air. In this last case the striations were organized into small patches of 1 to 2 ?m in size.

Lungu, C. P.; Tico?, C. M., E-mail: catalin.ticos@inflpr.ro; Poro?nicu, C.; Jepu, I.; Lungu, M.; Marcu, A.; Luculescu, C.; Cojocaru, G.; Ursescu, D.; B?nici, R.; Ungureanu, G. R. [National Institute for Laser, Plasma and Radiation Physics, 077125 Bucharest (Romania)] [National Institute for Laser, Plasma and Radiation Physics, 077125 Bucharest (Romania)

2014-03-10T23:59:59.000Z

32

Microstructure of TiB{sub 2}/carbon steel surface-alloyed materials fabricated by high-energy electron beam irradiation  

SciTech Connect (OSTI)

The processing and the microstructural analysis of TiB{sub 2}/carbon steel surface-alloyed materials using the irradiation of a high-energy electron beam were investigated in this study. The mixtures of TiB{sub 2} powders and flux were deposited on a plain carbon steel substrate, and then electron beam was irradiated on these mixtures using an electron beam accelerator. The microstructure of the irradiated surface layer was composed of a melted region, an interfacial region, a coarse-grained heat-affected zone (HAZ), and a fine-grained HAZ. A few residual micropores were found in the melted region of the specimen processed without flux because of irregular thermal transfer, but their number was decreased in the specimens processed with a considerable amount of flux. As a result of irradiation, the Ti content was homogeneously maintained throughout the melted region, whose hardness was greatly improved. This was associated with the microstructural modification including the segregation of Ti and B along solidification cell boundaries and the formation of fine Ti(C, N) particles. The proper flux mix ratio was 15 to 30% to obtain excellent surface alloying and a homogeneous microstructure.

Euh, K. Lee, S.; Shin, K.

1999-12-01T23:59:59.000Z

33

Surface and Coatings Technology 102 (1998) 9096 Effects of argon irradiation on a plasma-nitrided carbon steel  

E-Print Network [OSTI]

-nitrided carbon steel G. Simon, M.A.Z. Vasconcellos, C.A. dos Santos * Instituto de Fisica -- UFRGS Av. Bento Gonc; accepted 20 October 1997 Abstract We report on the effects of Ar irradiation on a plasma-nitrided steel. Samples of AISI 1010 steel were nitrided in a mixture of H 2 -20% N 2 under a total pressure of 5 mbar

dos Santos, C.A.

34

Low energy electron irradiation of an apple  

E-Print Network [OSTI]

The viability of pathogenic organisms on the surface of fresh fruits and vegetables can be significantly reduced by low energy electron beam irradiation. The most difficult technical challenge for surface irradiation of fruits and vegetable...

Brescia, Giovanni Batista

2002-01-01T23:59:59.000Z

35

Infrared thermometry and interferential microscopy for analysis of crater formation at the surface of fused silica under CO{sub 2} laser irradiation  

SciTech Connect (OSTI)

In situ spatial and temporal temperature measurements of a fused silica surface heated by a 10.6 {mu}m CO{sub 2} laser were performed using an infrared camera. These measurements were derived from heat flux emission of the fused silica. High temperature measurements--in the range 400-2500 K--were performed at the surface of a semi-transparent media with a high spatial resolution. Particular attention was given to the experimental conception and to the calibration of the infrared device. Moreover, both conventional and interferential microscopes were used to characterize the silica surfaces after CO{sub 2} laser irradiation. By associating these results with thermal camera measurements we identified the major surface temperature levels of silica transformation when heated during 250 ms. Surface deformation of silica is observed for temperatures <2000 K. This is consistent with other recent work using CO{sub 2} laser heating. At higher temperatures, matter ejection, as deduced from microscope observations, occurs at temperatures that are still much lower than the standard boiling point. Such evaporation is described by a thermodynamical approach, and calculations show very good agreement with experiment.

Robin, Lucile; Cormont, Philippe; Hebert, David; Mainfray, Christelle; Rullier, Jean-Luc [CEA Cesta, Le Barp, F-33114 France (France); Combis, Patrick [CEA DAM Ile-de-France, Arpajon Cedex, 91297 France (France); Gallais, Laurent [Institut Fresnel, CNRS, Aix-Marseille Universite, Ecole Centrale Marseille, Marseille, 13013 France (France)

2012-03-15T23:59:59.000Z

36

Study on the role of laser surface irradiation on damage and decohesion of Al/epoxy joints  

E-Print Network [OSTI]

on the bond toughness of aluminum/epoxy bonded joints. The evolution of substrate surface morphology similar or dissimilar materials in a variety of modern industries (e.g. automotive, aerospace, etc.) [1

Paulino, Glaucio H.

37

Monte Carlo radiative transfer simulation for the near-ocean-surface high-resolution downwelling irradiance statistics  

E-Print Network [OSTI]

We present a numerical study of the near-surface underwater solar light statistics using the state-of-the-art Monte Carlo radiative transfer (RT) simulations in the coupled atmosphere-ocean system. Advanced variance-reduction ...

Xu, Zao

38

Los Alamos, NASA  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Unusual light in dark space revealed by Los Alamos, NASA November 7, 2014 Near-infrared data could change the way we think about galaxies LOS ALAMOS, N.M., Nov. 7, 2014-By looking...

39

NASA Heliophysics Theory Program  

E-Print Network [OSTI]

to the NASA Heliophysics Theory Program Proposal # 07-HTP07-0015 DYNAMICS OF MAGNETOSPHERE Announcement Number NNH07ZDA001N-HTP Dynamics of Magnetosphere-Ionosphere Coupling Project Summary Objectives

Lotko, William

40

Surfaces  

E-Print Network [OSTI]

Surfaces is a collection of four individual essays which focus on the characteristics and tactile qualities of surfaces within a variety of perceived landscapes. Each essay concentrates on a unique surface theme and purpose; ...

DeMaio, Ernest Vincent, 1964-

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

The effect of surface irradiance on the absorption spectrum of chromophoric dissolved organic matter in the global ocean  

E-Print Network [OSTI]

.2 mm), is responsible for nearly 90% of ultraviolet (UV) radiation attenuation in the global ocean matter in the global ocean Chantal M. Swan a,n , Norman B. Nelson a , David A. Siegel a,b , Tihomir S to better assess the impact of CDOM on surface ocean photochemistry and remote sensing of ocean color

Siegel, David A.

42

On the applicability of the Heliosat-2 method to assess surface solar irradiance in the Intertropical Convergence Zone,  

E-Print Network [OSTI]

on the Earth's surface and its geographical distribution is of prime importance for numerous solar-3027" DOI : 10.1080/01431161.2012.756598 #12;2 energy systems for heating and electrical power generation satisfactory for Europe, including Madeira Island (Aculinin 2008; Blanc et al. 2011; Lefèvre et al. 2007

Paris-Sud XI, Université de

43

Sandia National Laboratories: NASA  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLSMolten-Salt Storage System Areva SolarNASA NASA Award for

44

Note: Proton irradiation at kilowatt-power and neutron production from a free-surface liquid-lithium target  

SciTech Connect (OSTI)

The free-surface Liquid-Lithium Target, recently developed at Soreq Applied Research Accelerator Facility (SARAF), was successfully used with a 1.9 MeV, 1.2 mA (2.3 kW) continuous-wave proton beam. Neutrons (?2 10{sup 10} n/s having a peak energy of ?27 keV) from the {sup 7}Li(p,n){sup 7}Be reaction were detected with a fission-chamber detector and by gold activation targets positioned in the forward direction. The setup is being used for nuclear astrophysics experiments to study neutron-induced reactions at stellar energies and to demonstrate the feasibility of accelerator-based boron neutron capture therapy.

Halfon, S.; Feinberg, G. [Soreq NRC, Yavne 81800 (Israel); Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel); Arenshtam, A.; Kijel, D.; Weissman, L.; Aviv, O.; Berkovits, D.; Dudovitch, O.; Eisen, Y.; Eliyahu, I.; Haquin, G.; Hazenshprung, N.; Kreisel, A.; Mardor, I.; Shimel, G.; Shor, A.; Silverman, I.; Yungrais, Z. [Soreq NRC, Yavne 81800 (Israel); Paul, M., E-mail: paul@vms.huji.ac.il; Tessler, M. [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)

2014-05-15T23:59:59.000Z

45

Dynamics of the egress of gas microbubbles from a melt under laser irradiation of a metal surface  

SciTech Connect (OSTI)

The results of a theoretical investigation of the efficiency of degassing of the near-surface region of a material exposed to laser radiation are presented. The case of a low volume concentration of the monodispersed gas phase representing microbubbles of size no greater than 10 {mu}m is considered. The principal parameters are revealed which determine the regimes of the egress of gas bubbles from a laser-produced melt, and analytical formulas are obtained for estimating the process rate. The analytical results are compared with the results of two-dimensional numerical simulations which include the laser heating of a solid sample, its melting, the development of thermocapillary melt convection, and the escape of gas bubbles from the melt. The analytical and numerical results are found to be in good agreement. (laser applications and other topics in quantum electronics)

Likhanskii, V V; Loboiko, A I [State Research Center of Russian Federation 'Troitsk Institute for Innovation and Fusion Research', Troitsk, Moscow Region (Russian Federation)

2000-09-30T23:59:59.000Z

46

NASA Enhanced Use Lease  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOEToward a PeacefulDriving DemandSafetyKCA-4204 NASA JOHN F.

47

NASA @ APS | Argonne National Laboratory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

developing rocket propulsion hardware Patrick McManamen, a propulsion system engineer at NASA, examines a cryogenically cooled fuel spray from a test rocket injector...

48

IRRADIATION EXPERIMENTS &  

E-Print Network [OSTI]

IRRADIATION EXPERIMENTS & FACILITIES AT BNL: BLIP & NSLS II Peter Wanderer Superconducting Magnet). Current user: LBNE ­ materials for Project X. · Long Baseline Neutrino Experiment ­ Abandoned gold mine

McDonald, Kirk

49

The NASA Food Commercial Space  

E-Print Network [OSTI]

The NASA Food Technology Commercial Space Center and How Your Company Can Participate space Commercial Space Center Iowa State University 2901 South Loop Drive, Suite 3700 Ames, IA 50010-8632 Phone Manager NASA Food Technology Commercial Space Center Iowa State University 2901 South Loop Drive, Suite

Lin, Zhiqun

50

Nanopatterning of metal-coated silicon surfaces via ion beam irradiation: Real time x-ray studies reveal the effect of silicide bonding  

SciTech Connect (OSTI)

We investigated the effect of silicide formation on ion-induced nanopatterning of silicon with various ultrathin metal coatings. Silicon substrates coated with 10 nm Ni, Fe, and Cu were irradiated with 200 eV argon ions at normal incidence. Real time grazing incidence small angle x-ray scattering (GISAXS) and x-ray fluorescence (XRF) were performed during the irradiation process and real time measurements revealed threshold conditions for nanopatterning of silicon at normal incidence irradiation. Three main stages of the nanopatterning process were identified. The real time GISAXS intensity of the correlated peaks in conjunction with XRF revealed that the nanostructures remain for a time period after the removal of the all the metal atoms from the sample depending on the binding energy of the metal silicides formed. Ex-situ XPS confirmed the removal of all metal impurities. In-situ XPS during the irradiation of Ni, Fe, and Cu coated silicon substrates at normal incidence demonstrated phase separation and the formation of different silicide phases that occur upon metal-silicon mixing. Silicide formation leads to nanostructure formation due the preferential erosion of the non-silicide regions and the weakening of the ion induced mass redistribution.

El-Atwani, Osman [School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907 (United States); Gonderman, Sean; Suslova, Anastassiya; Fowler, Justin; El-Atwani, Mohamad [School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); DeMasi, Alexander; Ludwig, Karl [Physics Department, Boston University, Boston, Massachusetts 02215 (United States); Paul Allain, Jean [School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907 (United States); School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

2013-03-28T23:59:59.000Z

51

The Way Forward2 Authors: David Rind, NASA GISS; Ralph A. Kahn, NASA GSFC; Mian Chin, NASA3  

E-Print Network [OSTI]

; Hongbin Yu, NASA GSFC; Patricia Quinn, NOAA PMEL;5 Rangasayi Halthore, NASA HQ/NRL6 7 4.1. Major Research

52

National Aeronautical and Space Administration (NASA) Johnson...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Aeronautical and Space Administration (NASA) Johnson Space Flight Center National Aeronautical and Space Administration (NASA) Johnson Space Flight Center Space Shuttle Endeavour,...

53

NASA Remote Sensing Validation Data: Saudi Arabia  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Since 1995, the King Abdulaziz City for Science and Technology (KACST) and the National Renewable Energy Laboratory (NREL) have co-operated to establish a 12 station network of high quality solar radiation monitoring installations across the Kingdom of Saudi Arabia. NREL and KACST realized the value of accurate surface solar radiation flux measurements for validation of satellite derived surface and atmospheric solar radiation flux measurements, and is making this data available to support validation of satellite data products related to the NASA Mission to Planet Earth component of the Earth Science Enterprise Earth Observing System (EOS) project to evaluate long term climate trends based on measuements from EOS Terra Platforms. A CIMEL 8 channel sunphotometer for measuring aerosol optical depth at 6 wavelengths and total column water has been deployed at the Solar Village station since February 24, 1999. [Taken from http://rredc.nrel.gov/solar/new_data/Saudi_Arabia/

Myers, Daryl R. (NREL); Al-Abbadi,Naif (King Abdulaziz City for Science and Technology, Energy Research Institite); Wilcox, Steve (NREL)

54

Los Alamos, NASA  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample6,LocalNuclearandplantsLos AlamosLos Alamos8,

55

Institute on Climate and Planets http://icp.giss.nasa.gov/ The Role of the Atmosphere and Greenhouse Effect in  

E-Print Network [OSTI]

http://icp.giss.nasa.gov/ The Role of the Atmosphere and Greenhouse Effect in Determining the Surface. This process is the natural greenhouse effect. The earths surface receives solar energy and energy reradiated

56

apres irradiation globale: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

necessary for the evaluation of global irradiance on inclined surface which is needed for photovoltaic Boyer, Edmond 7 Caractristiques lectriques de diodes Au-Si(N) ralises aprs...

57

Safer Food with Irradiation  

E-Print Network [OSTI]

This publication answers questions about food irradiation and how it helps prevent foodborne illnesses. Included are explanations of how irradiation works and its benefits. Irradiation is a safe method of preserving food quality and ensuring its...

Thompson, Britta; Vestal, Andy; Van Laanen, Peggy

2003-01-21T23:59:59.000Z

58

NASA STI Program... in Profile Since its founding, NASA has been dedicated  

E-Print Network [OSTI]

helping NASA maintain this important role. CONFERENCE PUBLICATION. Collected papers from scientific and technical conferences, symposia, seminars, or other meetings sponsored or co-sponsored by NASA. The NASA STI program operates under the auspices of the Agency Chief Information Officer. It collects, organizes, provides for archiving, and disseminates NASAs STI. The NASA STI program provides access to the NASA Aeronautics and Space Database and its public interface, the NASA Technical Report Server, thus providing one of the largest collections of aeronautical and space science STI in the world. Results are published in both non-NASA channels and by NASA in the NASA STI Report Series, which includes the following report types:

unknown authors

59

NASA/TM--2014216600 Traffic Management Coordinator  

E-Print Network [OSTI]

weather. NASA and American Airlines (AA) have been conducting an operational trial of DWR since July 17

60

ELECTRON IRRADIATION OF KUIPER BELT SURFACE ICES: TERNARY N{sub 2}-CH{sub 4}-CO MIXTURES AS A CASE STUDY  

SciTech Connect (OSTI)

The space weathering of icy Kuiper Belt Objects was investigated in this case study by exposing methane (CH{sub 4}) and carbon monoxide (CO) doped nitrogen (N{sub 2}) ices at 10 K to ionizing radiation in the form of energetic electrons. Online and in situ Fourier transform infrared spectroscopy was utilized to monitor the radiation-induced chemical processing of these ices. Along with isocyanic acid (HNCO), the products could be mainly derived from those formed in irradiated binary ices of the N{sub 2}-CH{sub 4} and CO-CH{sub 4} systems: nitrogen-bearing products were found in the form of hydrogen cyanide (HCN), hydrogen isocyanide (HNC), diazomethane (CH{sub 2}N{sub 2}), and its radical fragment (HCN{sub 2}); oxygen-bearing products were of acetaldehyde (CH{sub 3}CHO), formyl radical (HCO), and formaldehyde (H{sub 2}CO). As in the pure ices, the methyl radical (CH{sub 3}) and ethane (C{sub 2}H{sub 6}) were also detected, as were carbon dioxide (CO{sub 2}) and the azide radical (N{sub 3}). Based on the temporal evolution of the newly formed products, kinetic reaction schemes were then developed to fit the temporal profiles of the newly formed species, resulting in numerical sets of rate constants. The current study highlights important constraints on the preferential formation of isocyanic acid (HNCO) over hydrogen cyanide (HCN) and hydrogen isocyanide (HNC), thus guiding the astrobiological and chemical evolution of those distant bodies.

Kim, Y. S.; Kaiser, R. I., E-mail: ralfk@hawaii.edu [Department of Chemistry, University of Hawaii at Manoa, Honolulu, HI 96822 (United States)

2012-10-10T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Fluorination mechanisms of Al{sub 2}O{sub 3} and Y{sub 2}O{sub 3} surfaces irradiated by high-density CF{sub 4}/O{sub 2} and SF{sub 6}/O{sub 2} plasmas  

SciTech Connect (OSTI)

Fluorination of Al{sub 2}O{sub 3} and Y{sub 2}O{sub 3} surfaces was investigated by irradiating high-density, helicon-wave CF{sub 4}/O{sub 2} and SF{sub 6}/O{sub 2} plasmas. The Al{sub 2}O{sub 3} surface bombarded by high-flux positive ions of the CF{sub 4}/O{sub 2} plasma was fluorinated significantly. On contrast, Y{sub 2}O{sub 3} was less fluorinated than Al{sub 2}O{sub 3} when they were irradiated by the same CF{sub 4}/O{sub 2} plasma. The analysis of the Al{sub 2}O{sub 3} surface irradiated by the CF{sub 4}/O{sub 2} plasma suggests that the fluorination is triggered by reactions between fluorocarbon deposit and Al-O bonding with the assistance of ion bombardment. On the other hand, irradiation of the SF{sub 6}/O{sub 2} plasma induced less significant fluorination on the Al{sub 2}O{sub 3} surface. This suggests a lower reaction probability between sulfur fluoride deposit and Al-O bonding. The difference in the fluorination of the Al{sub 2}O{sub 3} and Y{sub 2}O{sub 3} surfaces induced by the irradiations of the CF{sub 4}/O{sub 2} and SF{sub 6}/O{sub 2} plasmas is understood by comparing the bonding energies of C-O, S-O, Al-O, and Y-O.

Miwa, Kazuhiro; Takada, Noriharu; Sasaki, Koichi [Department of Electrical Engineering and Computer Science, Nagoya University, Nagoya, 464-8603 (Japan); Plasma Nanotechnology Research Center, Nagoya University, Nagoya 464-8603 (Japan)

2009-07-15T23:59:59.000Z

62

Estimation of the inherent optical properties of natural waters from the irradiance attenuation coefficient and  

E-Print Network [OSTI]

Estimation of the inherent optical properties of natural waters from the irradiance attenuation, and the backscattering bb coefficients in the upper ocean from irradiance reflectance just beneath the sea surface, R 0 , and the average attenuation coefficient for downwelling irradiance, Kd 1, between the surface and the first

Stramski, Dariusz

63

NASA's sea ice program: present and future  

E-Print Network [OSTI]

· New remote sensing applications Infer properties such as sea ice thickness from ICESat Research · WhatNASA's sea ice program: present and future Thomas Wagner, PhD Program Scientist, Cryosphere NASA for remote sensing · New algorithms to interpret satellite data Improvements to long term satellite record

Kuligowski, Bob

64

Science at NASAScience at NASA Waleed Abdalati  

E-Print Network [OSTI]

, and efficiency of aeronautical and space vehicles; 3) The development and operation of vehicles capable Biological and Physical Processes in the Space Environmentthe Space Environment #12;NASA Organizational Chart #12;NASA Organizational Chart OCSOffice of the d i i OCTAdministrator SMDARMD Centers SMD S0MD

65

GTL-1 Irradiation Summary Report  

SciTech Connect (OSTI)

The primary objective of the Gas Test Loop (GTL-1) miniplate experiment is to confirm acceptable performance of high-density (i.e., 4.8 g-U/cm3) U3Si2/Al dispersion fuel plates clad in Al-6061 and irradiated under the relatively aggressive Booster Fast Flux Loop (BFFL) booster fuel conditions, namely a peak plate surface heat flux of 450 W/cm2. As secondary objectives, several design and fabrication variations were included in the test matrix that may have the potential to improve the high-heat flux, high-temperature performance of the base fuel plate design.1, 2 The following report summarizes the life of the GTL-1 experiment through end of irradiation, including as-run neutronic analysis, thermal analysis and hydraulic testing results.

D. M. Perez; G. S. Chang; N. E. Woolstenhulme; D. M. Wachs

2012-01-01T23:59:59.000Z

66

Sandia National Laboratories: NASA Award for Marginal Ice Zone...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ClimateECClimateAnalysisNASA Award for Marginal Ice Zone Observations and Process Experiment (MIZOPEX) NASA Award for Marginal Ice Zone Observations and Process Experiment...

67

UESC Project Overview: NASA Ames Research Center  

Broader source: Energy.gov [DOE]

Presentationgiven at the Fall 2011 Federal Utility Partnership Working Group (FUPWG) meetingprovides an overview of the NASA Ames Research Center's Utility Energy Services Contract (UESC) project.

68

Shuttle Spinoffs www.nasa.gov  

E-Print Network [OSTI]

: Homeowners are insulating their homes with the same lightweight, flexible aerogel NASA uses to insulate: Rescue squads use a new handheld cutter to remove accident victims from wrecked vehicles. Based

69

Evaluating Quality and Palatability Characteristics of Beef Subprimals Treated with Low-dose Irradiation  

E-Print Network [OSTI]

. Paired subprimals were randomly assigned to treated (irradiated) and control (non-irradiated) groups. The treated group was irradiated with a surface dose of 1-1.5 kGy. Following treatment, subprimals were fabricated into thirds and randomly assigned...

Arnold, John

2012-02-14T23:59:59.000Z

70

Microscopic mechanisms of laser ablation of organic solids in the thermal and stress confinement irradiation regimes  

E-Print Network [OSTI]

irradiation is defined by the combination of the optical, mechanical and thermodynamic properties irradiation regimes Leonid V. Zhigileia) and Barbara J. Garrisonb) Department of Chemistry, The Pennsylvania confinement regime results in broader velocity distributions in the direction normal to the irradiated surface

Zhigilei, Leonid V.

71

Using multi-angle, multispectral photo-polarimetry of the NASA Glory mission to constrain optical properties of aerosols and clouds: Results from  

E-Print Network [OSTI]

Using multi-angle, multispectral photo-polarimetry of the NASA Glory mission to constrain optical Sensor (APS) for the determination of aerosol and cloud properties and a Total Irradiance Monitor (TIM (IFOV)instrument. The APS sensor will provide high-precision measurements of the total and polarized

72

Comminuting irradiated ferritic steel  

DOE Patents [OSTI]

Disclosed is a method of comminuting irradiated ferritic steel by placing the steel in a solution of a compound selected from the group consisting of sulfamic acid, bisulfate, and mixtures thereof. The ferritic steel is used as cladding on nuclear fuel rods or other irradiated components.

Bauer, Roger E. (Kennewick, WA); Straalsund, Jerry L. (Kennewick, WA); Chin, Bryan A. (Auburn, AL)

1985-01-01T23:59:59.000Z

73

National Aeronautics and Space Administration NASA Technology Transfer Program  

E-Print Network [OSTI]

National Aeronautics and Space Administration NASA Technology Transfer Program Bringing NASA of technology transfer that NASA maximizes the benefit of the Nation's investment in cutting-edge research technology transfer has made us confident that these solutions, while originally conceived to solve NASA

Waliser, Duane E.

74

NASA Centennial Challenges were initiated in 2005 to directly engage  

E-Print Network [OSTI]

competitions for infusion into NASA missions. Enable Challenge competitors to develop and/or expand business

Waliser, Duane E.

75

Management and Performance NASA'S APPROACH TO PERFORMANCE MANAGEMENT  

E-Print Network [OSTI]

TO PERFORMANCE MANAGEMENT conduct the Agency's day-to-day work. Figure 1 depicts NASA's organizational structureManagement and Performance NASA'S APPROACH TO PERFORMANCE MANAGEMENT NASA's FY 2015 Management as an organization and NASA's approach to performance management, strategic planning, and performance reporting

Waliser, Duane E.

76

NASA HISTORY: CALENDAR YEAR 2003 IN REVIEW Introduction  

E-Print Network [OSTI]

, Mark. NASA's Nuclear Frontier: the Plum Brook Research Reactor (NASA SP-2003 of Flight (NASA SP-2002-09-511-HQ). NASA History Office Books from Other Publishers Bilstein, Roger E. This particular book also features an accompanying CD, full of interesting and relevant media on the Centaur

77

Irradiation Creep in Graphite  

SciTech Connect (OSTI)

An understanding of the underlying mechanisms of irradiation creep in graphite material is required to correctly interpret experimental data, explain micromechanical modeling results, and predict whole-core behavior. This project will focus on experimental microscopic data to demonstrate the mechanism of irradiation creep. High-resolution transmission electron microscopy should be able to image both the dislocations in graphite and the irradiation-induced interstitial clusters that pin those dislocations. The team will first prepare and characterize nanoscale samples of virgin nuclear graphite in a transmission electron microscope. Additional samples will be irradiated to varying degrees at the Advanced Test Reactor (ATR) facility and similarly characterized. Researchers will record microstructures and crystal defects and suggest a mechanism for irradiation creep based on the results. In addition, the purchase of a tensile holder for a transmission electron microscope will allow, for the first time, in situ observation of creep behavior on the microstructure and crystallographic defects.

Ubic, Rick; Butt, Darryl; Windes, William

2014-03-13T23:59:59.000Z

78

RERTR-7 Irradiation Summary Report  

SciTech Connect (OSTI)

The Reduced Enrichment for Research and Test Reactor (RERTR) experiment RERTR-7A, was designed to test several modified fuel designs to target fission densities representative of a peak low enriched uranium (LEU) burnup in excess of 90% U-235 at peak experiment power sufficient to generate a peak surface heat flux of approximately 300 W/cm2. The RERTR-7B experiment was designed as a high power test of 'second generation' dispersion fuels at peak experiment power sufficient to generate a surface heat flux on the order of 230 W/cm2.1 The following report summarizes the life of the RERTR-7A and RERTR-7B experiments through end of irradiation, including as-run neutronic analyses, thermal analyses and hydraulic testing results.

D. M. Perez; M. A. Lillo; G. S. Chang; G. A. Roth; N. E. Woolstenhulme; D. M. Wachs

2011-12-01T23:59:59.000Z

79

The NASA CSTI High Capacity Power Program  

SciTech Connect (OSTI)

The SP-100 program was established in 1983 by DOD, DOE, and NASA as a joint program to develop the technology necessary for space nuclear power systems for military and civil applications. During 1986 and 1987, the NASA Advanced Technology Program was responsible for maintaining the momentum of promising technology advancement efforts started during Phase I of SP-100 and to strengthen, in key areas, the chances for successful development and growth capability of space nuclear reactor power systems for future space applications. In 1988, the NASA Advanced Technology Program was incorporated into NASA`s new Civil Space Technology Initiative (CSTI). The CSTI program was established to provide the foundation for technology development in automation and robotics, information, propulsion, and power. The CSTI High Capacity Power Program builds on the technology efforts of the SP-100 program, incorporates the previous NASA advanced technology project, and provides a bridge to the NASA exploration technology programs. The elements of CSTI high capacity power development include conversion systems - Stirling and thermoelectric, thermal management, power management, system diagnostics, and environmental interactions. Technology advancement in all areas, including materials, is required to provide the growth capability, high reliability and 7 to 10 years lifetime demanded for future space nuclear power systems. The overall program will develop and demonstrate the technology base required to provide a wide range of modular power systems while minimizing the impact of day/night operation as well as attitudes and distance from the Sun. Significant accomplishments in all of the program elements will be discussed, along with revised goals and project timelines recently developed.

Winter, J.M.

1994-09-01T23:59:59.000Z

80

AC 2007-504: NASA OPPORTUNITIES FOR FACULTY AT MINORITY INSTITUTIONS: REFLECTIONS OF NASA ADMINISTRATOR FELLOWS  

E-Print Network [OSTI]

interests include robotics, machine design, dynamics and control systems. He began his NAFP tenure in 2006 is currently in his second year of his fellowship working at NASA Headquarters as Special Assistant to the Deputy Assistant Administrator in the Office of Education. Scott Askew, NASA R. Scott Askew received his

Everett, Louis J.

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Analysis of tritium transport in irradiated beryllium  

SciTech Connect (OSTI)

Analysis of the beryllium tritium release results with simple analytical models indicated that tritium behavior in Be is not dominated by one simple mechanism, but by a combination of several mechanisms including surface processes and helium bubbles. A model was developed and the initial version of the model included tritium diffusion in the beryllium and the beryllium oxide, second order desorption at the solid/gas interface and diffusion through interconnected porosity. Fundamental data, tritium diffusion and desorption coefficients for Be and BeO, were derived from experimental data using the model. Beryllium is a metal to which one can generally apply the concepts of diffusion, solubility, surface processes and traps. Tritium transport in the irradiated beryllium is affected by processes occurring in the bulk, He bubbles, the bulk/surface and surface/gas interfaces. There are two types of solid/gas surfaces in the irradiated Be. One is the surface at the pure Be/He bubble interface where no oxide layer exists and the other is the surface at the BeO layer/purge gas interface. Although the material characteristics of the Be and BeO layer are different and have different activation barriers, the surface processes can be applied to both interfaces.

Cho, S.; Abdou, M.A. [Univ. of California, Los Angeles, CA (United States)

1994-12-31T23:59:59.000Z

82

EFFECT OF EXCIMER LASER IRRADIATION OF BIODEGRADABLE POLYMER ON ITS CHEMICAL BONDING  

E-Print Network [OSTI]

EFFECT OF EXCIMER LASER IRRADIATION OF BIODEGRADABLE POLYMER ON ITS CHEMICAL BONDING Paper M1306 profile is favorable for surface treatment. The effects of excimer laser irradiation on the surface to their biocompatibility and biodegradability. Being biodegradable, poly lactic acid (PLA) is used in food packaging

Yao, Y. Lawrence

83

Interaction of wide-band-gap single crystals with 248-nm excimer laser irradiation. X. Laser-induced near-surface absorption in single-crystal NaCl  

E-Print Network [OSTI]

are expected to play an important role in optical break- down and surface damage. II. EXPERIMENT The results of a few thousand kelvin even in the absence of visible surface damage. The origin of the laser absorption radiation. As much as 20% of the incident radiation at 248 nm must be absorbed in the near-surface region

Dickinson, J. Thomas

84

NASA Townhall AAS 224th Meeting  

E-Print Network [OSTI]

://science.nasa.gov/astrophysics/documents/ 1 #12;HST sees Water Vapor Plumes on Europa Hydrogen Oxygen Hydrogen and oxygen emission lines from works 2. Explore how it began and evolved 3. Search for life on planets around other stars Flight telescope backplane & backplane support fixture Pathfinder (backplane center section

Christian, Eric

85

www.nasa.gov Strategic Plan  

E-Print Network [OSTI]

panels retracted into the shadows of its protective solar shield, approaches the Sun in this artist's con, an environment able to support microbial life. (Credit: NASA/JPL­Caltech) Solar Probe Plus, its primary solar- cept. Managed by the Goddard Space Flight Center, Solar Probe Plus will repeatedly sample the near

Waliser, Duane E.

86

Disposal Of Irradiated Cadmium Control Rods From The Plumbrook Reactor Facility  

SciTech Connect (OSTI)

Innovative mixed waste disposition from NASA's Plum Brook Reactor Facility was accomplished without costly repackaging. Irradiated characteristic hardware with contact dose rates as high as 8 Sv/hr was packaged in a HDPE overpack and stored in a Secure Environmental Container during earlier decommissioning efforts, awaiting identification of a suitable pathway. WMG obtained regulatory concurrence that the existing overpack would serve as the macro-encapsulant per 40CFR268.45 Table 1.C. The overpack vent was disabled and the overpack was placed in a stainless steel liner to satisfy overburden slumping requirements. The liner was sealed and placed in shielded shoring for transport to the disposal site in a US DOT Type A cask. Disposition via this innovative method avoided cost, risk, and dose associated with repackaging the high dose irradiated characteristic hardware. In conclusion: WMG accomplished what others said could not be done. Large D and D contractors advised NASA that the cadmium control rods could only be shipped to the proposed Yucca mountain repository. NASA management challenged MOTA to find a more realistic alternative. NASA and MOTA turned to WMG to develop a methodology to disposition the 'hot and nasty' waste that presumably had no path forward. Although WMG lead a team that accomplished the 'impossible', the project could not have been completed with out the patient, supportive management by DOE-EM, NASA, and MOTA. (authors)

Posivak, E.J.; Berger, S.R.; Freitag, A.A. [WMG, Inc., Peekskill, NY (United States)

2008-07-01T23:59:59.000Z

87

https://zulu.ssc.nasa.gov/mrsid/ Gary Parker  

E-Print Network [OSTI]

https://zulu.ssc.nasa.gov/mrsid/ Gary Parker 2008 Bill Dietrich, Tetsuji Muto, Chuck Nittrouer://zulu.ssc.nasa.gov/mrsid/ "Blocked valley lake" Blake and Ollier (1971) Dietrich et al. (1999) blocked valley lake) #12; Google

Parker, Gary

88

Unusual light in dark space revealed by Los Alamos, NASA  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Unusual light in dark space revealed by Los Alamos, NASA Unusual light in dark space revealed by Los Alamos, NASA By looking at the dark spaces between visible galaxies and stars...

89

NASA HISTORY: CALENDAR YEAR 2004 IN REVIEW Introduction  

E-Print Network [OSTI]

Publications Bowles, Mark D., and Bob Arrighi. NASA's Nuclear Frontier: the Plum Brook Research Reactor (NASA with the February, 2004 issue. Book contracts were awarded or in progress on planetary protection, aeronautics

90

DatosdelaNASA Plan de contingencias del lanzamiento  

E-Print Network [OSTI]

Final de Impacto Ambiental de la misión. La NASA prepara y ensaya planes de respuesta ante contingencias

91

Application and Management of Commonality within NASA Systems  

E-Print Network [OSTI]

Application and Management of Commonality within NASA Systems by Richard A. Rhodes B.S. Mechanical Students #12;2 #12;3 Application and Management of Commonality within NASA Systems by Richard A. Rhodes within NASA systems and to identify the best practices and key challenges for the management

de Weck, Olivier L.

92

March 17, 2004 1 Open Source Release of NASA Software  

E-Print Network [OSTI]

Release of NASA Software ­ NPR 2210.1, External Release of NASA Software · Purpose of Policy ­ To protect NASA and American public's investment in software and to maintain and enhance U.S. industry's competitiveness in the U.S. & international marketplace #12;March 17, 2004 7 Software Release Policy · Policy

93

Meeting Report--NASA Radiation Biomarker Workshop  

SciTech Connect (OSTI)

A summary is provided of presentations and discussions from the NASA Radiation Biomarker Workshop held September 27-28, 2007, at NASA Ames Research Center in Mountain View, California. Invited speakers were distinguished scientists representing key sectors of the radiation research community. Speakers addressed recent developments in the biomarker and biotechnology fields that may provide new opportunities for health-related assessment of radiation-exposed individuals, including for long-duration space travel. Topics discussed include the space radiation environment, biomarkers of radiation sensitivity and individual susceptibility, molecular signatures of low-dose responses, multivariate analysis of gene expression, biomarkers in biodefense, biomarkers in radiation oncology, biomarkers and triage following large-scale radiological incidents, integrated and multiple biomarker approaches, advances in whole-genome tiling arrays, advances in mass-spectrometry proteomics, radiation biodosimetry for estimation of cancer risk in a rat skin model, and confounding factors. Summary conclusions are provided at the end of the report.

Straume, Tore; Amundson, Sally A,; Blakely, William F.; Burns, Frederic J.; Chen, Allen; Dainiak, Nicholas; Franklin, Stephen; Leary, Julie A.; Loftus, David J.; Morgan, William F.; Pellmar, Terry C.; Stolc, Viktor; Turteltaub, Kenneth W.; Vaughan, Andrew T.; Vijayakumar, Srinivasan; Wyrobek, Andrew J.

2008-05-01T23:59:59.000Z

94

Irradiation Stability of Carbon Nanotubes  

E-Print Network [OSTI]

Ion irradiation of carbon nanotubes is a tool that can be used to achieve modification of the structure. Irradiation stability of carbon nanotubes was studied by ion and electron bombardment of the samples. Different ion species at various energies...

Aitkaliyeva, Assel

2010-01-14T23:59:59.000Z

95

NASA Net Zero Energy Buildings Roadmap  

SciTech Connect (OSTI)

In preparation for the time-phased net zero energy requirement for new federal buildings starting in 2020, set forth in Executive Order 13514, NASA requested that the National Renewable Energy Laboratory (NREL) to develop a roadmap for NASA's compliance. NASA detailed a Statement of Work that requested information on strategic, organizational, and tactical aspects of net zero energy buildings. In response, this document presents a high-level approach to net zero energy planning, design, construction, and operations, based on NREL's first-hand experience procuring net zero energy construction, and based on NREL and other industry research on net zero energy feasibility. The strategic approach to net zero energy starts with an interpretation of the executive order language relating to net zero energy. Specifically, this roadmap defines a net zero energy acquisition process as one that sets an aggressive energy use intensity goal for the building in project planning, meets the reduced demand goal through energy efficiency strategies and technologies, then adds renewable energy in a prioritized manner, using building-associated, emission- free sources first, to offset the annual energy use required at the building; the net zero energy process extends through the life of the building, requiring a balance of energy use and production in each calendar year.

Pless, S.; Scheib, J.; Torcellini, P.; Hendron, B.; Slovensky, M.

2014-10-01T23:59:59.000Z

96

Continuous wave laser irradiation of explosives  

SciTech Connect (OSTI)

Quantitative measurements of the levels of continuous wave (CW) laser light that can be safely applied to bare explosives during contact operations were obtained at 532 nm, 785 nm, and 1550 nm wavelengths. A thermal camera was used to record the temperature of explosive pressed pellets and single crystals while they were irradiated using a measured laser power and laser spot size. A visible light image of the sample surface was obtained before and after the laser irradiation. Laser irradiation thresholds were obtained for the onset of any visible change to the explosive sample and for the onset of any visible chemical reaction. Deflagration to detonation transitions were not observed using any of these CW laser wavelengths on single crystals or pressed pellets in the unconfined geometry tested. Except for the photochemistry of DAAF, TATB and PBX 9502, all reactions appeared to be thermal using a 532 nm wavelength laser. For a 1550 nm wavelength laser, no photochemistry was evident, but the laser power thresholds for thermal damage in some of the materials were significantly lower than for the 532 nm laser wavelength. No reactions were observed in any of the studied explosives using the available 300 mW laser at 785 nm wavelength. Tables of laser irradiance damage and reaction thresholds are presented for pressed pellets of PBX9501, PBX9502, Composition B, HMX, TATB, RDX, DAAF, PETN, and TNT and single crystals of RDX, HMX, and PETN for each of the laser wavelengths.

McGrane, Shawn D.; Moore, David S.

2010-12-01T23:59:59.000Z

97

Evolution of Risk Management at NASA in the Context of Achieving Adequate Safety  

Broader source: Energy.gov [DOE]

Presenter: Homayoon Dezfuli, Ph.D. NASA Technical Fellow for System Safety Office of Safety and Mission Assurance NASA Headquarters

98

NASA/Ames Global Emissions Data Set (GLEMIS) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories onFocus Area EnergyMohawkaccrediationNASA-Surface Meteorology

99

Comparison of different global information sources used in surface radiative flux calculation  

E-Print Network [OSTI]

), the Laboratoire de Me´te´orologie Dynamique, NOAA/NASA Pathfinder Advanced Very High Resolution Radiometer project Spectroradiometer product, the NASA Global Energy and Water Cycle Experiment Surface Radiation Budget project surface albedos in the near-infrared remain poorly constrained (highly uncertain), they do not cause too

100

A Brief History of the Lunar Roving Vehicle As Part of the History of the NASA Marshall Space Flight Center,  

E-Print Network [OSTI]

#12;A Brief History of the Lunar Roving Vehicle As Part of the History of the NASA Marshall Space, Technical Editor For more information about the history of the Marshall Space Flight Center go to http vehicle on the surface of the moon. This booklet generally recounts the steps that the Marshall Space

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Studying femtosecond-laser hyperdoping by controlling surface morphology  

E-Print Network [OSTI]

We study the fundamental properties of femtosecond-laser (fs-laser) hyperdoping by developing techniques to control the surface morphology following laser irradiation. By decoupling the formation of surface roughness from ...

Winkler, Mark T.

102

NASA Enhanced Use Lease | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergy HealthCommentsAugust 2012 MonthlyYear ScheduleCodes @NASA Enhanced Use Lease

103

Polymer surface treatment with particle beams  

DOE Patents [OSTI]

A polymer surface and near surface treatment process produced by irradiation with high energy particle beams. The process is preferably implemented with pulsed ion beams. The process alters the chemical and mechanical properties of the polymer surface in a manner useful for a wide range of commercial applications.

Stinnett, Regan W. (1033 Tramway La. NE., Albuquerque, NM 87122); VanDevender, J. Pace (7604 Lamplighter NE., Albuquerque, NM 87109)

1999-01-01T23:59:59.000Z

104

Polymer surface treatment with particle beams  

DOE Patents [OSTI]

A polymer surface and near surface treatment process produced by irradiation with high energy particle beams is disclosed. The process is preferably implemented with pulsed ion beams. The process alters the chemical and mechanical properties of the polymer surface in a manner useful for a wide range of commercial applications. 16 figs.

Stinnett, R.W.; VanDevender, J.P.

1999-05-04T23:59:59.000Z

105

NANOSTRUCTURE PATTERNING UNDER ENERGETIC PARTICLE BEAM IRRADIATION  

SciTech Connect (OSTI)

Energetic ion bombardment can lead to the development of complex and diverse nanostructures on or beneath the material surface through induced self-organization processes. These self-organized structures have received particular interest recently as promising candidates as simple, inexpensive, and large area patterns, whose optical, electronic and magnetic properties are different from those in the bulk materials [1-5]. Compared to the low mass efficiency production rate of lithographic methods, these self-organized approaches display new routes for the fabrication of nanostructures over large areas in a short processing time at the nanoscale, beyond the limits of lithography [1,4]. Although it is believed that surface nanostructure formation is based on the morphological instability of the sputtered surface, driven by a kinetic balance between roughening and smoothing actions [6,7], the fundamental mechanisms and experimental conditions for the formation of these nanostructures has still not been well established, the formation of the 3-D naopatterns beneath the irradiated surface especially needs more exploration. During the last funding period, we have focused our efforts on irradiation-induced nanostructures in a broad range of materials. These structures have been studied primarily through in situ electron microscopy during electron or ion irradiation. In particular, we have performed studies on 3-D void/bubble lattices (in metals and CaF2), embedded sponge-like porous structure with uniform nanofibers in irradiated semiconductors (Ge, GaSb, and InSb), 2-D highly ordered pattern of nanodroplets (on the surface of GaAs), hexagonally ordered nanoholes (on the surface of Ge), and 1-D highly ordered ripple and periodic arrays (of Cu nanoparticles) [3,8-11]. The amazing common feature in those nanopatterns is the uniformity of the size of nanoelements (nanoripples, nanodots, nanovoids or nanofibers) and the distance separating them. Our research focuses on the understanding of fundamental scientific basis for the irradiation-induced self-organization processes. The fundamental physical mechanisms underlying ordered pattern formation, which include defect production and migration, ion sputtering, redeposition, viscous flow and diffusion, are investigated through a combination of modeling and in situ and ex-situ observations [3,9,11]. In addition, these nanostructured materials exhibit considerable improvement of optical properties [9,12,13]. For example, patterned Ge with a hexagonally ordered, honeycomb-like structure of nanoscale holes possesses a high surface area and a considerably blue-shifted energy gap [9], and oxidation of ordered Ga droplets shows noticeable enhancement of optical transmission [12]. This research has addressed nanopattern formation in a variety of materials under ion bombardment and provided a fundamental understanding of the dynamic mechanisms involved. In addition, have also stared to systematically investigate pattern formation under ion irradiation for more systems with varied experimental conditions and computation, including the collaboration with Dr. Veena Tikare of Sandia National Laboratory with a hybrid computation method at the ending this grant. A more detailed relationship between nanostructure formation and experimental conditions will be revealed with our continued efforts.

Wang, Lumin [Regents of the University of Michigan; Lu, Wei [Regents of the University of Michigan

2013-01-31T23:59:59.000Z

106

Deformation patterns in thin films under uniform laser irradiation D. Walgraef  

E-Print Network [OSTI]

Deformation patterns in thin films under uniform laser irradiation D. Walgraef Mechanical to laser irradiation is described by a dynamical model that is based on coupled evolution equations la- ser damage of optical components, and nonuniform melting of semiconductor surfaces, to cite only

Ghoniem, Nasr M.

107

The NASA CSTI High Capacity Power Project  

SciTech Connect (OSTI)

The SP-100 Space Nuclear Power Program was established in 1983 by DOD, DOE, and NASA as a joint program to develop technology for military and civil applications. Starting in 1986, NASA has funded a technology program to maintain the momentum of promising aerospace technology advancement started during Phase I of SP-100 and to strengthen, in key areas, the changes for successful development and growth capability of space nuclear reactor power systems for a wide range of future space applications. The elements of the CSTI High Capacity Power Project include Systems Analysis, Stirling Power Conversion, Thermoelectric Power Conversion, Thermal Management, Power Management, Systems Diagnostics, Environmental Interactions, and Material/Structural Development. Technology advancement in all elements is required to provide the growth capability, high reliability and 7 to 10 year lifetime demanded for future space nuclear power systems. The overall project with develop and demonstrate the technology base required to provide a wide range of modular power systems compatible with the SP-100 reactor which facilitates operation during lunar and planetary day/night cycles as well as allowing spacecraft operation at any attitude or distance from the sun. Significant accomplishments in all of the project elements will be presented, along with revised goals and project timelines recently developed.

Winter, J.; Dudenhoefer, J.; Juhasz, A.; Schwarze, G.; Patterson, R.; Ferguson, D.; Titran, R. [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center; Schmitz, P. [Sverdrup Technology, Inc., Brook Park, OH (United States). Lewis Research Center Group; Vandersande, J. [Jet Propulsion Lab., Pasadena, CA (United States)

1994-09-01T23:59:59.000Z

108

Effect of {gamma}-irradiation on strength of concrete for nuclear-safety structures  

SciTech Connect (OSTI)

Concrete applied for construction of nuclear power plant (NPP) Temelin (Czech Republic) has been exposed to {gamma}-irradiation up to dose 6x10{sup 5} Gy. Depending on the level of irradiation, changes in strength, porous structure and phase composition of the concrete have been studied. It is found that irradiation lowers both the strength of concrete (about 10%) and volume (resp. surface) of porous space. On the other hand, {gamma}-irradiation increases the ratio of calcite, CaCO{sub 3}, in the concrete. Observed effects are discussed with respect to safety of NPPs.

Vodak, F. [Czech Technical University (CVUT), Faculty of Civil Engineering, Prague, Thakurova 7, CZ 166 29 Prague 6 (Czech Republic); Trtik, K. [Czech Technical University (CVUT), Faculty of Civil Engineering, Prague, Thakurova 7, CZ 166 29 Prague 6 (Czech Republic); Sopko, V. [Czech Technical University (CVUT), Faculty of Civil Engineering, Prague, Thakurova 7, CZ 166 29 Prague 6 (Czech Republic); Kapickova, O. [Czech Technical University (CVUT), Faculty of Civil Engineering, Prague, Thakurova 7, CZ 166 29 Prague 6 (Czech Republic); Demo, P. [Czech Technical University (CVUT), Faculty of Civil Engineering, Prague, Thakurova 7, CZ 166 29 Prague 6 (Czech Republic)]. E-mail: demo@fzu.cz

2005-07-01T23:59:59.000Z

109

Analytical protostellar disk models 1: the effect of internal dissipation and surface irradiation on the structure of disks and the location of the snow line around Sun-like stars  

E-Print Network [OSTI]

We construct a new set of self-consistent analytical disk models by taking into account both viscous and radiative sources of thermal energy. We analyze the non-isothermal structure of the disk across the mid-plane for optically thick disks, and use the standard two-temperature model in the case of optically thin disks. We deduce a set of general formula for the relationship between the mass accretion rate and the surface density profile. Our results recover those of Chiang & Goldreich in the optically thin regions, but extend their work for the opaque regions of the disk. For the purpose of illustration, we apply our theory in this paper to determine the structure of protostellar disks around T Tauri stars under a state of steady accretion and derive the corresponding radial distribution function of various disk properties such as surface density and temperature near the mid-plane. We calculate the position of the snow line around a sun-like T Tauri star, and deduce that it can evolve from well outside 10 AU during FU Orionis outbursts, to about 4 AU during passive accretion phase, to the present-day orbital radius of Venus and finally re-expand to over 2.2 AU during the protostellar- to-debris disk transition. This non-monotonous evolution of the snow line may provide some novel and deterministic explanation for the total water content and its isotopic composition of both Venus and the Earth. In the optically thin, outermost regions of the disk we find that the surface density profile of the dust varies roughly as 1/r, which is consistent with mm observations of spatially resolved disk of Mundy et al. (2000).

Pascale Garaud; Douglas N. C. Lin

2006-05-03T23:59:59.000Z

110

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

). For more information about NASA's Green Building, please visit the Web site: http://www.nasa.gov/centers/goddard/news/green_building 02 GoddardUpdate Table of Contents Goddard Updates Construction Update #4 on New Science Building ­ 2 in a recurring series of articles chronicling the construction of Goddard's Exploration Sciences Building (ESB

Christian, Eric

111

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

2006 Table of Contents GoddardUpdates Goddard Updates NASA Watches Total Eclipse from Libya and Turkey Libya. Libya provided the best location to see the solar phenomena; the expansive Sahara Desert podcasts. Live webcasts and NASA TV coverage from Turkey began at 5 a.m. EST March 29. In addition to Libya

Christian, Eric

112

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

Rani Gran Goddard TV, THEMIS Producer 0/286-248 44/226-77 cell Rani .C .Gran@nasa .gov NASA Kennedy window of 6:08 P .M . 6:27 P .M . The Delta II rocket carrying THEMIS will lift off from Launch Complex

Waliser, Duane E.

113

NASA Exploration and Innovation Lead to New Discoveries Five heavyweight  

E-Print Network [OSTI]

NASA Exploration and Innovation Lead to New Discoveries Five heavyweight lifting-body designs 1960 1961 1962 19641963 1965 1966 1967 1968 19691959 Lifting Bodies 1962-1975 Gemini 1962 disposal. Weather Satellites 1960-Present NASA launched the first Television Infrared

Waliser, Duane E.

114

Lori Garver, NASA Deputy Administrator NSSC Quarterly Meeting  

E-Print Network [OSTI]

resources, information technology, and business support -- NASA would not be able to accomplish the amazing services business model works, not only for the 85% of Fortune 500 companies that use it, but also;2 Your efforts are improving service to those throughout NASA and improving efficiency. As Chair

115

NASA's Return On Investment Report Issue 11 February 2013  

E-Print Network [OSTI]

and controls for the Dream Chaser spacecraft, Atlas V launch vehicle, and ground and mission systems. Meanwhile. facility. When completed, the vehicle will be shipped to NASA's Dryden Flight Research Center at Edwards their next test vehicle structure at NASA's Michoud Assembly Facility in New Orleans. In December, Space

116

Space Robotic Capabilities David Kortenkamp (NASA Johnson Space Center)  

E-Print Network [OSTI]

Johnson Space Center Space Robotic Capabilities David Kortenkamp (NASA Johnson Space Center) Liam) David Wettergreen (Carnegie Mellon University) Dan Clancy (NASA Ames) #12;Johnson Space Center 12/18/2001 Space Robotics State-of-Art 2 ! Motivation Science Objectives Mission Concepts Robots Human

Kortenkamp, David

117

Administracin Nacional de Aeronutica y del Espacio DatosdelaNASA  

E-Print Network [OSTI]

realiza investigaciones principalmente en dos centros de campo de agencias: el Centro de Investigaciones Ames de la NASA y el Centro de Investigaciones Langley de la NASA; además, colabora con la industria izquierda a derecha) Laboratorio de Operaciones de Tráfico Aéreo: este laboratorio, que incluye simuladores

118

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

National Aeronautics and Space Administration www.nasa.gov LANCE Land Atmosphere Near, MODIS, and OMI instruments onboard NASA's Earth Observing System (EOS) satellites- Terra, Aqua and Aura programs and global food security risks are monitored using MODIS NRT data from LANCE. There are several

119

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

National Aeronautics and Space Administration www.nasa.gov Volume 1 Issue 10 November 2005 Goddard. Weiler and Judith Bruner, Associate Director for Safety and Security, encourages you to participate, NASA's Swift satellite has taken a top honor in the annual "Best of What's New" award from Popular

Christian, Eric

120

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

Leadership in Environmental, Energy, and Economic Performance Fleet Petroleum Use GOAL: Reduce by 2% annuallyAgencyClimateAdaptationPlanbyJuly2012 · ProvideFleetManagementPlanbyJuly2012 GOALS STATUS #12;WE ARE... NASA is meeting or exceeding most of its SSPP goals and objectives. Since our prior annual report, NASA's sustainability efforts

Waliser, Duane E.

Note: This page contains sample records for the topic "irradiance nasa surface" 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

NASA Launches ATREX Space Network to Begin New Design Phase  

E-Print Network [OSTI]

Design Phase - 8 Dual Frequency Radar Arrives at Goddard - 9 Goddard Community Visitor Center Hosts TitanNASA Launches ATREX Pg 3 Space Network to Begin New Design Phase Pg 8 Visitor Center Hosts Titan://www.nasa.gov/centers/goddard/news/goddard-view.html Managing Editor: Trusilla Steele Editor: John M. Putman News items for publication in Goddard View must

Christian, Eric

122

NASA Home > News & Features > News Topics > Solar System > Features Send Print Share > Log In To MyNASA | > Sign Up  

E-Print Network [OSTI]

overhead to provide a birds-eye view of mountain ranges, lakes and canyons. On the ground, a rover or lakeNASA Home > News & Features > News Topics > Solar System > Features Send Print Share > Log In To MyNASA | > Sign Up News & Features News Topics Shuttle & Station Moon & Mars Solar System Sun-Earth System

Arizona, University of

123

Enhanced electrochemical etching of ion irradiated silicon by localized amorphization  

SciTech Connect (OSTI)

A tailored distribution of ion induced defects in p-type silicon allows subsequent electrochemical anodization to be modified in various ways. Here we describe how a low level of lattice amorphization induced by ion irradiation influences anodization. First, it superposes a chemical etching effect, which is observable at high fluences as a reduced height of a micromachined component. Second, at lower fluences, it greatly enhances electrochemical anodization by allowing a hole diffusion current to flow to the exposed surface. We present an anodization model, which explains all observed effects produced by light ions such as helium and heavy ions such as cesium over a wide range of fluences and irradiation geometries.

Dang, Z. Y.; Breese, M. B. H. [Centre for Ion Beam Applications (CIBA), Department of Physics, National University of Singapore Singapore 117542 (Singapore); Lin, Y.; Tok, E. S. [Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Vittone, E. [Physics Department, NIS Excellence Centre and CNISM, University of Torino, via Pietro Giuria 1, 10125 Torino (Italy)

2014-05-12T23:59:59.000Z

124

Properties of solar gravity mode signals in total irradiance observations  

SciTech Connect (OSTI)

Further evidence has been found that a significant fraction of the gravity mode power density in the total irradiance observations appears in sidebands of classified eigenfrequencies. These sidebands whose amplitudes vary from year to year are interpreted as harmonics of the rotational frequencies of the nonuniform solar surface. These findings are for non axisymmetric modes and corroborate the findings of Kroll, Hill and Chen for axisymmetric modes. It is demonstrated the the generation of the sidebands lifts the usual restriction on the parity of the eigenfunctions for modes detectable in total irradiance observations. 14 refs.

Kroll, R.J.; Chen, J.; Hill, H.A.

1988-01-01T23:59:59.000Z

125

Irradiation Effects on Human Cortical Bone Fracture Behavior  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface ReactionsIrradiation Effects onIrradiation

126

Irradiation Effects on Human Cortical Bone Fracture Behavior  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface ReactionsIrradiation EffectsIrradiation

127

E-Print Network 3.0 - azobenzene polyesters surface Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

gelators used to gel LCs contain no azobenzene... in the absence of rubbed surfaces or irradiation that can be applied to ... Source: Zhao, Yue - Dpartement de chimie,...

128

The NASA Astrophysics Data System: Overview  

E-Print Network [OSTI]

The NASA Astrophysics Data System Abstract Service has become a key component of astronomical research. It provides bibliographic information daily, or near daily, to a majority of astronomical researchers worldwide. We describe the history of the development of the system and its current status. We show several examples of how to use the ADS, and we show how ADS use has increased as a function of time. Currently it is still increasing exponentially, with a doubling time for number of queries of 17 months. Using the ADS logs we make the first detailed model of how scientific journals are read as a function of time since publication. The impact of the ADS on astronomy can be calculated after making some simple assumptions. We find that the ADS increases the efficiency of astronomical research by 333 Full Time Equivalent (2000 hour) research years per year, and that the value of the early development of the ADS for astronomy, compared with waiting for mature technologies to be adopted, is 2332 FTE research years. The ADS is available at http://adswww.harvard.edu/.

M. J. Kurtz; G. Eichhorn; A. Accomazzi; C. Grant; S. S. Murray; J. M. Watson

2000-02-04T23:59:59.000Z

129

The spectral irradiance traceability chain at PTB  

SciTech Connect (OSTI)

Spectral irradiance is a fundamental radiometric unit. Its application to measurement results requires qualified traceability to basic units of the international system of units (Systeme international d'unites, SI). The Physikalisch-Technische Bundesanstalt (PTB) is amongst other national metrological institutes (NMIs) responsible for the realization, maintenance and dissemination of various radiometric and photometric units based on and traceable to national standards. The unit of spectral irradiance is realized and represented by a blackbody-radiator as the national primary standard of the PTB. Based on Planck's radiation law, the irradiance is calculated and realized for any wavelength taking into account the exact knowledge of the radiation temperature and the geometrical parameters. Using a double-monochromator-based spectroradiometer system, secondary standard lamps can be calibrated by direct comparison to the blackbody-radiator (substitution method). These secondary standard lamps are then used at the PTB to calibrate standard lamps of customers. The customers themselves use these so-called transfer standards to calibrate their working standard lamps. These working standards are then used to calibrate own spectroradiometers or sources. This rather complex calibration chain is a common procedural method that for the customers generally leads to satisfying measurement results on site. Nevertheless, the standard lamps in use have to fulfill highest requirements concerning stability and reproducibility. Only this allows achieving comparably low transfer measurement uncertainties, which occur at each calibration step. Thus, the PTB is constantly investigating the improvement and further development of transfer standards and measurement methods for various spectral regions. The realization and dissemination of the spectral irradiance using the blackbody-radiator at the PTB is accomplished with worldwide approved minimized measurement uncertainties confirmed by international intercomparisons among NMIs. Ultimately, the spectral irradiance can be realized with expanded measurement uncertainties of far less than 1 % over a wide spectral range. Thus, for customers with high demands on low measurement uncertainties, it is possible to calibrate their working standards directly against the blackbody-radiator, taking into account the higher necessary effort. In special cases it is possible to calibrate the customer's spectroradiometric facilities directly in front of the blackbody-radiator. In the context of the European Metrology Research Project Traceability for surface spectral solar ultraviolet radiation, the traceability chain will be improved and adapted.

Sperfeld, P.; Pape, S.; Nevas, S. [Physikalisch-Technische Bundesanstalt, Bundesallee 10, 381160 Braunschweig (Germany)

2013-05-10T23:59:59.000Z

130

Radiation Damage Study in Natural Zircon Using Neutrons Irradiation  

SciTech Connect (OSTI)

Changes of atomic displacements in crystalline structure of natural zircon (ZrSiO{sub 4}) can be studied by using neutron irradiation on the surface of zircon and compared the data from XRD measurements before and after irradiation. The results of neutron irradiation on natural zircon using Pneumatic Transfer System (PTS) at PUSPATI TRIGA Research Reactor in the Malaysian Nuclear Agency are discussed in this work. The reactor produces maximum thermal power output of 1 MWatt and the neutron flux of up to 1x10{sup 13} ncm{sup -2}s{sup -1}. From serial decay processes of uranium and thorium radionuclides in zircon crystalline structure, the emission of alpha particles can produce damage in terms of atomic displacements in zircon. Hence, zircon has been extensively studied as a possible candidate for immobilization of fission products and actinides.

Lwin, Maung Tin Moe; Amin, Yusoff Mohd.; Kassim, Hasan Abu [Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia); Mohamed, Abdul Aziz [Materials Technology Group, Industrial Technology Division, Malaysian Nuclear Agency Bangi, 43000 Kajang, Selangor Darul Ehsan (Malaysia); Karim, Julia Abdul [Reactor Physics Section, Nuclear Power Division, Malaysian Nuclear Agency Bangi, 43000 Kajang, Selangor Darul Ehsan (Malaysia)

2011-03-30T23:59:59.000Z

131

Estimation of height-dependent solar irradiation and application to the solar climate of Iran  

SciTech Connect (OSTI)

An explicitly height-dependent model has been used to estimate the solar irradiation over Iran which has a vast range of altitudes. The parameters of the model have been chosen on general grounds and not by parameters best fitting to any of the available measured irradiation data in Iran. The estimated global solar irradiation on the horizontal surface shows a very good agreement (4.1% deviation) with the 17-year long pyranometric measurements in Tehran, and also, is in good agreement with other, shorter available measured data. The entire data base of the Iranian meteorological stations have been used to establish a simple relation between the sunshine duration records and the cloud cover reports which can be utilized in solar energy estimations for sites with no sunshine duration recorders. Clear sky maps of Iran for direct solar irradiation on tracking, horizontal, and south-facing vertical planes are presented. The global solar irradiation map for horizontal surface with cloudiness is zoned into four irradiation zones. In about four-fifths of the land in Iran, the annual-mean daily global solar irradiation on horizontal surface ranges from 4.5 to 5.4 kWh/m[sup 2].

Samimi, J. (Sharif Univ of Technology, Tehran (Iran, Islamic Republic of))

1994-05-01T23:59:59.000Z

132

Threshold irradiation dose for amorphization of silicon carbide  

SciTech Connect (OSTI)

The amorphization of silicon carbide due to ion and electron irradiation is reviewed with emphasis on the temperature-dependent critical dose for amorphization. The effect of ion mass and energy on the threshold dose for amorphization is summarized, showing only a weak dependence near room temperature. Results are presented for 0.56 MeV silicon ions implanted into single crystal 6H-SiC as a function of temperature and ion dose. From this, the critical dose for amorphization is found as a function of temperature at depths well separated from the implanted ion region. Results are compared with published data generated using electrons and xenon ions as the irradiating species. High resolution TEM analysis is presented for the Si ion series showing the evolution of elongated amorphous islands oriented such that their major axis is parallel to the free surface. This suggests that surface or strain effects may be influencing the apparent amorphization threshold. Finally, a model for the temperature threshold for amorphization is described using the Si ion irradiation flux and the fitted interstitial migration energy which was found to be {approximately}0.56eV. This model successfully explains the difference in the temperature dependent amorphization behavior of SiC irradiated with 0.56 MeV Si{sup +} at 1 x 10{sup -3} dpa/s and with fission neutrons irradiated at 1 x 10{sup -6} dpa/s irradiated to 15 dpa in the temperature range of {approximately}340{+-}10K.

Snead, L.L.; Zinkle, S.J.

1997-03-01T23:59:59.000Z

133

articles nasa astrobiology: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research Center (NASA LaRC) and Bell Helicopter Textron Incorporated (Bell) during October 1999 at Bell's test site near Waxahachie, Texas. The test was the third in a...

134

argentine nasa: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research Center (NASA LaRC) and Bell Helicopter Textron Incorporated (Bell) during October 1999 at Bell's test site near Waxahachie, Texas. The test was the third in a...

135

augmenting nasa spacelink: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research Center (NASA LaRC) and Bell Helicopter Textron Incorporated (Bell) during October 1999 at Bell's test site near Waxahachie, Texas. The test was the third in a...

136

Rockets 2 Race Cars Teacher Program at Kentucky Speedway (NASA)  

Broader source: Energy.gov [DOE]

Register here. Go Green Edition / The Heat is ON! Get your students revved up about science, technology, engineering and mathematics with NASA's Rockets 2 Race Cars STEM Education program....

137

Accidents, engineering and history at NASA: 1967-2003  

E-Print Network [OSTI]

The manned spaceflight program of the National Aeronautics and Space Administration (NASA) has suffered three fatal accidents: one in the Apollo program and two in the Space Transportation System (the Shuttle). These were ...

Brown, Alexander F. G. (Alexander Frederic Garder), 1970-

2009-01-01T23:59:59.000Z

138

Application and management of commonality within NASA systems  

E-Print Network [OSTI]

Commonality can be defined as the sharing of assets such as components, designs, processes, technologies, interfaces, and/or infrastructure across systems. Through commonality, NASA has the opportunity to develop, produce, ...

Rhodes, Richard Alexander

2010-01-01T23:59:59.000Z

139

NASA Advisory Council Space Operations Committee July 2010  

E-Print Network [OSTI]

to solar panels Hubble spectrometer · · · Corrosion Lab · Coatings with microcapsules ­ self healing to minimize boil-off Aerogels Wire insulation ­ detection and healing layer · · Collaboration between NASA

Waliser, Duane E.

140

Proton irradiation effect on SCDs  

E-Print Network [OSTI]

The Low Energy X-ray Telescope is a main payload on the Hard X-ray Modulation Telescope satellite. The swept charge device is selected for the Low Energy X-ray Telescope. As swept charge devices are sensitive to proton irradiation, irradiation test was carried out on the HI-13 accelerator at the China Institute of Atomic Energy. The beam energy was measured to be 10 MeV at the SCD. The proton fluence delivered to the SCD was $3\\times10^{8}\\mathrm{protons}/\\mathrm{cm}^{2}$ over two hours. It is concluded that the proton irradiation affects both the dark current and the charge transfer inefficiency of the SCD through comparing the performance both before and after the irradiation. The energy resolution of the proton-irradiated SCD is 212 eV@5.9 keV at $-60\\,^{\\circ}\\mathrm{C}$, while it before irradiated is 134 eV. Moreover, better performance can be reached by lowering the operating temperature of the SCD on orbit.

Yan-Ji Yang; Jing-Bin Lu; Yu-Sa Wang; Yong Chen; Yu-Peng Xu; Wei-Wei Cui; Wei Li; Zheng-Wei Li; Mao-Shun Li; Xiao-Yan Liu; Juan Wang; Da-Wei Han; Tian-Xiang Chen; Cheng-Kui Li; Jia Huo; Wei Hu; Yi Zhang; Bo Lu; Yue Zhu; Ke-Yan Ma; Di Wu; Yan Liu; Zi-Liang Zhang; Guo-He Yin; Yu Wang

2014-04-19T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Effect of laser irradiation on the structure and valence states of copper in Cu-phosphate glass by XPS studies  

E-Print Network [OSTI]

Effect of laser irradiation on the structure and valence states of copper in Cu-phosphate glass, electrical threshold, and optical switching devices [6­8]. The general condition for semiconducting behavior a polaron. It is well known that laser irradiation could modify the surface chemistry of transition metal

Mekki, Abdelkarim

142

Linear Stability and Instability Patterns in Ion Bombarded Silicon Surfaces  

E-Print Network [OSTI]

surfaces. I experimentally determined the topographical phase diagram resulting from Ar+ ion irradiation measurements using the Multi-beam Optical Stress Sensor system were performed during amorphization of silicon by normal incidence 250 eV ion irradiation. An average compressive saturation stress built up

143

Specular Surface Recovery via Coded Target Stereopsis Arlene Ripsman  

E-Print Network [OSTI]

Jasiobedzki Technical Report CS-2003-03 March 26, 2003 Department of Computer Science 4700 Keele Street North is obtained by projecting light patterns onto the object's surface and inferring surface structure-board instruments from solar radiation. Figure 1 is a NASA photograph of the Hubble Space Telescope on orbit

Jenkin, Michael R. M.

144

Observed and CAM3 GCM Sea Surface Wind  

E-Print Network [OSTI]

Observed and CAM3 GCM Sea Surface Wind Speed Distributions: Characterization, Comparison, and Bias climatological surface wind speed probability density functions (PDFs) estimated from observations and use them to evaluate, for the first time, contemporaneous wind PDFs predicted by a GCM. The ob- servations include NASA

Zender, Charles

145

Interaction of soft x-ray laser pulse radiation with aluminum surface: Nano-meter size surface modification  

SciTech Connect (OSTI)

Interaction of soft x-ray laser radiation with material and caused modification of the exposed surface has both physical and practical interests. We irradiated the focusing soft x-ray laser (SXRL) pulses having a wavelength of 13.9 nm and the duration of 7 ps to aluminum (Al) surface. After the SXRL irradiation process, the irradiated Al surface was observed with a scanning electron microscope. The surface modifications caused by SXRL single pulse exposure were clearly seen. In addition, it was found that the conical structures having around 100 nm in diameters were formed in the shallow features. The nano-meter size modified structures at Al surface induced by SXRL pulse is interesting as the newly surface structure. Hence, the SXRL beam would be a candidate for a tool of micromachining. We also provide a thermomechanical modeling of SXRL interaction with Al briefly to explain the surface modification.

Ishino, Masahiko; Faenov, Anatoly; Tanaka, Momoko; Hasegawa, Noboru; Nishikino, Masaharu; Tamotsu, Satoshi; Pikuz, Tatiana; Inogamov, Nail; Zhakhovsky, Vasily; Skobelev, Igor; Fortov, Vladimir; Khohlov, Viktor; Shepelev, Vadim; Ohba, Toshiyuki; Kaihori, Takeshi; Ochi, Yoshihiro; Imazono, Takashi; Kawachi, Tetsuya [Quantum Beam Science Directorate, Japan Atomic Energy Agency, Kyoto 619-0215 (Japan); Joint Institute for High Temperatures, Russian Academy of Science, Moscow 125412 (Russian Federation); Graduate School of Humanities and Science, Nara Women's University, Nara 630-8506 (Japan); Landau Institute for Theoretical Physics, Russian Academy of Science, Chernogolovka 142432 (Russian Federation); Institute for Computer Aided Design, Russian Academy of Science, Moscow 123056 (Russian Federation)

2012-07-11T23:59:59.000Z

146

Low energy electron bombardment induced surface contamination of Ru mirrors  

E-Print Network [OSTI]

of electrons irradiation along with slight oxidation of pure Ru surface. All chemical changes were discussed for EUVL vacuum chamber to avoid heat induced degradation of the EUV optics6 . Heating of MLM scan initiate

Harilal, S. S.

147

amip ii land-surface: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Standards Process Breakout Session June 15, 2005 Robert Wolfe NASA GSFC Code 614.5 & Raytheon ITSS 12;June 15, 2005 - Wolfe - San Diego 2 MODIS Land Surface Reflectance products:...

148

Characterization of polymeric films subjected to lithium ion beam irradiation  

SciTech Connect (OSTI)

Two different polymeric materials that are candidate materials for use as binders for mixed uraniumplutonium oxide nuclear fuel pellets were subjected to Li ion beam irradiation, in order to simulate intense alpha irradiation. The materials (a polyethylene glycol 8000 and a microcrystalline wax) were then analyzed using a combination of mass spectrometry (MS) approaches and X-ray photoelectron spectroscopy (XPS). Samples of the irradiated PEG materials were dissolved in H2O and then analyzed using electrospray ionization-MS, which showed the formation of a series of small oligomers in addition to intact large PEG oligomers. The small oligomers were likely formed by radiation-induced homolytic scissions of the CO and CC bonds, which furnish radical intermediates that react by radical recombination with Hradical dot and OHradical dot. Surface analysis using SIMS revealed a heterogeneous surface that contained not only PEG-derived polymers, but also hydrocarbon-based entities that are likely surface contaminants. XPS of the irradiated PEG samples indicated the emergence of different carbon species, with peak shifts suggesting the presence of sp2 carbon atoms. Analysis of the paraffinic film using XPS showed the emergence of oxygen on the surface of the sample, and also a broadening and shifting of the C1s peak, demonstrating a change in the chemistry on the surface. The paraffinic film did not dissolve in either H2O or a H2Omethanol solution, and hence the bulk of the material could not be analyzed using electrospray. However a series of oligomers was leached from the bulk material that produced ion series in the ESI-MS analyses that were identified octylphenyl ethoxylate oligomers. Upon Li ion bombardment, these shifted to a lower average molecular weight, but more importantly showed the emergence of three new ion series that are being formed as a result of radiation damage. Surface analysis of the paraffinic polymers using SIMS produced spectra that were wholly dominated by hydrocarbon ion series, and no difference was observed between unirradiated and irradiated samples. The studies demonstrate that for the PEG-based polymers, direct evidence for radiolytic scission can be observed using ESI-MS, and suggests that both radiolytic pathways and efficiencies as a function of dose should be measurable by calibrating instrument response to the small oligomeric degradation products.

Gary S. Groenewold; W. Roger Cannon; Paul A. Lessing; Recep Avci; Muhammedin Deliorman; Mark Wolfenden; Doug W. Akers; J. Keith Jewell

2013-02-01T23:59:59.000Z

149

Passive wireless sensing tags NASA inflatable structures.  

SciTech Connect (OSTI)

This report gives a description of several types of wireless, unpowered remote sensors. Surface acoustic wave (SAW) devices were coupled with conventional sensors to create entirely new types of sensors. These sensors report physically measurable data in the same manner as the conventional sensors, but they do it remotely and without any local power source. The sensors are measured remotely using a radar-like interrogation device, and the sensors and their related communication electronics draw all of the power needed for communicating from the radar pulse. The report covers only a description of prototype sensors and not of the manufacturing requirements of these devices.

Brocato, Robert Wesley

2006-03-01T23:59:59.000Z

150

Neutron irradiation of beryllium pebbles  

SciTech Connect (OSTI)

Seven subcapsules from the FFTF/MOTA 2B irradiation experiment containing 97 or 100% dense sintered beryllium cylindrical specimens in depleted lithium have been opened and the specimens retrieved for postirradiation examination. Irradiation conditions included 370 C to 1.6 {times} 10{sup 22} n/cm{sup 2}, 425 C to 4.8 {times} 10{sup 22} n/cm{sup 2}, and 550 C to 5.0 {times} 10{sup 22} n/cm{sup 2}. TEM specimens contained in these capsules were also retrieved, but many were broken. Density measurements of the cylindrical specimens showed as much as 1.59% swelling following irradiation at 500 C in 100% dense beryllium. Beryllium at 97% density generally gave slightly lower swelling values.

Gelles, D.S.; Ermi, R.M. [Pacific Northwest National Lab., Richland, WA (United States); Tsai, H. [Argonne National Lab., IL (United States)

1998-03-01T23:59:59.000Z

151

Heritable Genetic Changes in Cells Recovered From Irradiated 3D Tissue Constructs  

SciTech Connect (OSTI)

Combining contemporary cytogenetic methods with DNA CGH microarray technology and chromosome flow-sorting increases substantially the ability to resolve exchange breakpoints associated with interstitial deletions and translocations, allowing the consequences of radiation damage to be directly measured at low doses, while also providing valuable insights into molecular mechanisms of misrepair processes that, in turn, identify appropriate biophysical models of risk at low doses. Specific aims apply to cells recovered from 3D tissue constructs of human skin and, for the purpose of comparison, the same cells irradiated in traditional 2D cultures. The project includes research complementary to NASA/HRP space radiation project.

Michael Cornforth

2012-03-26T23:59:59.000Z

152

THE INFLUENCE OF NEUTRON-IRRADIATION AT LOW TEMPERATURES ON THE DIELECTRIC PARAMETERS OF 3C-SiC  

SciTech Connect (OSTI)

3C-SiC wafers were irradiated with neutrons of various fluences and at low (200 - 400 ?C) irradiation temperatures. Fourier Transform infrared (FTIR) reflectance spectra were obtained for the samples, and the spectra used to extract the dielectric parameters for each specimen, using statistical curve-fitting procedures. Analysis of all data revealed trends in reflectance peak heights as well as in the dielectric parameters. The surface roughness of the irradiated samples was measured by atomic force spectroscopy (AFM) and certain trends could be ascribed to surface roughness.

J.A.A. Engelbrecht; G. Deyzel; E. Minnaar; W.E. Goosen; I. J. van Rooyen

2014-04-01T23:59:59.000Z

153

Surface Soil  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Surface Soil Surface Soil We compare local soil samples with samples collected from northern New Mexico locations that are beyond the range of potential influence from normal...

154

Statistical criteria for characterizing irradiance time series.  

SciTech Connect (OSTI)

We propose and examine several statistical criteria for characterizing time series of solar irradiance. Time series of irradiance are used in analyses that seek to quantify the performance of photovoltaic (PV) power systems over time. Time series of irradiance are either measured or are simulated using models. Simulations of irradiance are often calibrated to or generated from statistics for observed irradiance and simulations are validated by comparing the simulation output to the observed irradiance. Criteria used in this comparison should derive from the context of the analyses in which the simulated irradiance is to be used. We examine three statistics that characterize time series and their use as criteria for comparing time series. We demonstrate these statistics using observed irradiance data recorded in August 2007 in Las Vegas, Nevada, and in June 2009 in Albuquerque, New Mexico.

Stein, Joshua S.; Ellis, Abraham; Hansen, Clifford W.

2010-10-01T23:59:59.000Z

155

Sandia National Laboratories: NASA Ames Research Center in northern  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErik Spoerke SSLSMolten-Salt Storage System Areva SolarNASA NASA Award

156

3, 895959, 2006 Irradiance and  

E-Print Network [OSTI]

and corals. However, the contribution of benthic communities to the primary production of the global coastal energy source fueling marine primary prBGD 3, 895­959, 2006 Irradiance and primary production in the coastal ocean J.-P. Gattuso et al

Paris-Sud XI, Université de

157

sterilization by irradiation Arne Miller  

E-Print Network [OSTI]

-1:2006 Equipment characterization (6) Product definition (7) Process definition (8) Installation Qualification (9.1) Operational Qualification (9.2) · Performance Qualification (9.3) - later #12;3 Equipment characterization samples shall be irradiated to defined and uniform doses. #12;9 9.1 Installation qualification (A.9

158

Low temperature irradiation tests on  

E-Print Network [OSTI]

Sample cool down by He gas loop 10K 20K Fast neutron flux Measured by Ni activation in 2010 1.4xK #12;reactor Cryogenics #12;Al-Cu-Mg He gas temperature near sample 12K Resistance changesLow temperature irradiation tests on stabilizer materials using reactor neutrons at KUR Makoto

McDonald, Kirk

159

Irradiation-induced phenomena in carbon  

E-Print Network [OSTI]

Chapter 1 Irradiation-induced phenomena in carbon nanotubes To appear in "Chemistry of Carbon@acclab.helsinki.fi 1 #12;2CHAPTER 1. IRRADIATION-INDUCED PHENOMENA IN CARBON NANOTUBES #12;Contents 1 Irradiation-induced phenomena in carbon nanotubes 1 1.1 Introduction

Krasheninnikov, Arkady V.

160

Transition from Irradiation-Induced Amorphization to Crystallization...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

from Irradiation-Induced Amorphization to Crystallization in Nanocrystalline Silicon Carbide. Transition from Irradiation-Induced Amorphization to Crystallization in...

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Occlusion-Aware Hessians for Error Control in Irradiance Caching /  

E-Print Network [OSTI]

Control for Irradiance Caching. In ACM Transactions on Graphics,Control for Irradiance Caching. In ACM Transactions on Graphics,

Schwarzhaupt, Jorge Andres

2013-01-01T23:59:59.000Z

162

Mobile computing device configured to compute irradiance, glint, and glare of the sun  

DOE Patents [OSTI]

Described herein are technologies pertaining to computing the solar irradiance distribution on a surface of a receiver in a concentrating solar power system or glint/glare emitted from a reflective entity. A mobile computing device includes at least one camera that captures images of the Sun and the entity of interest, wherein the images have pluralities of pixels having respective pluralities of intensity values. Based upon the intensity values of the pixels in the respective images, the solar irradiance distribution on the surface of the entity or glint/glare corresponding to the entity is computed by the mobile computing device.

Gupta, Vipin P; Ho, Clifford K; Khalsa, Siri Sahib

2014-03-11T23:59:59.000Z

163

Renewable Energy Microgrid Testbed at NASA Ames Research  

E-Print Network [OSTI]

Renewable Energy Microgrid Testbed at NASA Ames Research Center Joel Kubby, Dan O'Leary, Zachary #12;Goals · Set-up a unique microgrid test-bed for renewable energy generation, monitoring and storage · Use the facility for testing systems integration, optimization and control of new renewable energy

Lee, Herbie

164

NASA Earth Science Technology Office 2014 Annual Report  

E-Print Network [OSTI]

projects and the advancement and infusion of technologies for NASA Earth science. Activities within. ESTO continues to build upon a strong history of technology development and infusion. In FY14 54 completed projects in the ESTO portfolio, 35% have already been infused while an additional 46% have a path

Waliser, Duane E.

165

NASA Technical Memorandum 109184 A Study of Workstation Computational  

E-Print Network [OSTI]

supercomputers. With this increased reliability, maintenance costs on workstations are considerably less-Time Flight Simulation Jeffrey M. Maddalon and Jeff I. Cleveland II Langley Research Center, Hampton, Virginia SIMULATION (NASA. lang|ey Research Center) ]0 p Unclas G3/60 0049832 February 1995 National Aeronautics

Maddalon, Jeffrey M.

166

National Aeronautics and Space Administration NASA Commercial Space  

E-Print Network [OSTI]

Accomplish? · · · · · Produced two new low-cost U.S. launch vehicles, two new autonomous cargo spacecraft NASA Science missions with two medium class launch vehicle options. Helping to recapture U.S. market:· ­ Dual Engine Centaur Liquid Oxygen Duct Development Test (April) Mission Control Center Interface Demo

Waliser, Duane E.

167

11Chandra 'Sees' a Distant Planet Evaporating NASA's Chandra Observatory  

E-Print Network [OSTI]

energy. A simple model of this planet's interior suggests that its atmosphere might account for as much11Chandra 'Sees' a Distant Planet Evaporating NASA's Chandra Observatory has discovered that the star CoRot-2a is a powerful X-ray source. This is unfortunate because it is also known that a planet

168

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

National Aeronautics and Space Administration www.nasa.gov American Geophysical Union Fall 2009 San Francisco, CA #12;National Aeronautics and Space Administration Background: ORNL DAAC Oak Ridge National of Energy. Big place, many people, diverse projects , since 1940s.http://www.ornl.gov/ Distributed Active

169

Formal Methods Technology Transfer: A View from NASA  

E-Print Network [OSTI]

Formal Methods Technology Transfer: A View from NASA James L. Caldwell Flight Electronics Home Page on the World­Wide Web 1 . In this paper I remark on the technology transfer strategy and its Formal Methods Home Page on the World­Wide Web. In this paper we concentrate on aspects of technology

Caldwell, James

170

Fall 2011 -A Quarterly Publication www.nasa.gov  

E-Print Network [OSTI]

the president's visit in late September. Photo credit: Official White House Photo by Pete Souza Thousands turn,500 people visited Ames to tour SOFIA. See page 6 for a feature about the SOFIA visit. NASA photo by Doiminic- ing of an energy-efficient sensor and cell phone application, detects toxic chemicals and alerts

171

NASA OFFICE OF INSPECTOR GENERAL APRIL 1SEPTEMBER 30, 2014  

E-Print Network [OSTI]

over the FY 2015 budget. At the same time, appropriations legislation considered in the House earlier this year. But SOFIA faces an uncertain future because the President's fiscal year (FY) 2015. While NASA projects its annual ISS budget to grow from its current $3 billion to nearly $4 billion by FY

Waliser, Duane E.

172

National Aeronautics and Space Administration NASA Diversity and Inclusion  

E-Print Network [OSTI]

Plan FY 2012 ­ FY 2015 March 16, 2012 Enclosure #12;NASA Diversity and Inclusion Strategic and Inclusion Assessment Survey, deployed in FY 2010, as well as the annual government-wide Employee Viewpoint actions for the Office of Personnel Management (OPM), the Office of Management and Budget (OMB), the Equal

Waliser, Duane E.

173

National Aeronautics and Space Administration NASA's Launch Services Program  

E-Print Network [OSTI]

Air Force Base (VAFB) in California. Other launch locations are NASA's Wallops Flight Facility's (ULA) Atlas V and Delta II, Space X's Falcon 1 and 9, Orbital Sciences Corp.'s Pegasus and Taurus XL in the 1970s. Among other missions, the Atlas/Agena rockets sent several spacecraft to photograph

174

"Light" or the Electromagnetic spectrum www.nasa.gov  

E-Print Network [OSTI]

(absorbed then emitted light) · About the solar atmosphere · About comet tails · About our galaxy · About#12;"Light" or the Electromagnetic spectrum www.nasa.gov #12;Diffraction and Light · When passed through a prism or grating, light is separated into its component wavelengths · This looks like a rainbow

Mojzsis, Stephen J.

175

www.nasa.gov WHITE SANDS MISSILE RANGE ACCESS CAPABILITIES  

E-Print Network [OSTI]

and missile launch, tracking, and recovery · Nuclear effects testing · High-speed sled track · Directed energy weapons testing · Climatic and dynamic environments testing · Atmospheric research · Electronicwww.nasa.gov WHITE SANDS MISSILE RANGE ACCESS CAPABILITIES SUMMARY White Sands Test Facility (WSTF

176

www.nasa.gov WSTF SAFETY AND HEALTH CAPABILITIES  

E-Print Network [OSTI]

a positive safety culture where employees and management work together to identify hazards and eliminate jobwww.nasa.gov WSTF SAFETY AND HEALTH CAPABILITIES SUMMARY The White Sands Test Facility (WSTF) Safety & Mission Assurance (S&MA) offices support all WSTF test activities and general industrial safety

177

The Space Economy NASA 50th Anniversary Lecture Series  

E-Print Network [OSTI]

The Space Economy NASA 50th Anniversary Lecture Series Michael D. Griffin Administrator National growth that didn't previously exist. This is the emerging Space Economy, an economy that is transforming our lives here on Earth in ways that are not yet fully understood or appreciated. It is not an economy

178

NASA/TM2010216190 A General Algorithm for Reusing Krylov  

E-Print Network [OSTI]

-Stokes Mark H. Carpenter Langley Research Center, Hampton, Virginia C. Vuik, Peter Lucas, Martin van Gijzen, and Hester Bijl Delft University of Technology, Delft, The Netherlands January 2010 #12;NASA STI Program­216190 A General Algorithm for Reusing Krylov Subspace Information. I. Unsteady Navier-Stokes Mark H. Carpenter

Vuik, Kees

179

NASA Perspectives on Cryo H2 DOE Hydrogen Storage Workshop  

E-Print Network [OSTI]

-space, MMOD protection) -Vapor/cryocooler cooled shields - Sun shades - Low conductivity/ cooled support propellant - Inventory (Bookkeeping) - Pressure-volume-temperature (PVT) - High accuracy low-g techniques;7 NASA Cryogenic Technology Objectives · To develop storage and distribution technologies for cryogens

180

Oxide shell reduction and magnetic property changes in core-shell Fe nanoclusters under ion irradiation  

SciTech Connect (OSTI)

Ion irradiation effects are studied on the Fe-based core-shell nanocluster (NC) films with core as Fe and shell as Fe{sub 3}O{sub 4}/Fe{sub 3}N. These NC films were deposited on Si substrates to thickness of ?0.5 ?m using a NC deposition system. The films were irradiated at room temperature with 5.5?MeV Si{sup 2+} ions to ion fluences of 10{sup 15} and 10{sup 16} ions/cm{sup 2}. It is found that the irradiation induces grain growth, Fe valence reduction in the shell, and crystallization or growth of Fe{sub 3}N. The film retained its Fe-core and its ferromagnetic properties after irradiation. The nature and mechanism of oxide shell reduction and composition dependence after irradiation were studied by synthesizing additional NC films of Fe{sub 3}O{sub 4} and FeO?+?Fe{sub 3}N and irradiating them under the same conditions. The presence of nanocrystalline Fe is found to be a major factor for the oxide shell reduction. The surface morphologies of these films show dramatic changes in the microstructures due to cluster growth and agglomeration as a result of ion irradiation.

Sundararajan, Jennifer A.; Kaur, Maninder; Qiang, You, E-mail: youqiang@uidaho.edu [Department of Physics, University of Idaho, Moscow, Idaho 83844 (United States); Jiang, Weilin [Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352 (United States); McCloy, John S. [School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164 (United States)

2014-05-07T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Formation of nanostructured TiO{sub 2} by femtosecond laser irradiation of titanium in O{sub 2}  

SciTech Connect (OSTI)

We used femtosecond laser irradiation of titanium metal in an oxidizing environment to form a highly stable surface layer of nanostructured amorphous titanium dioxide (TiO{sub 2}). We studied the influence of atmospheric composition on these surface structures and found that gas composition and pressure affect the chemical composition of the surface layer but not the surface morphology. Incorporation of nitrogen is only possible when no oxygen is present in the surrounding atmosphere.

Landis, Elizabeth C. [Department of Chemistry, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138 (United States); Phillips, Katherine C.; Mazur, Eric [School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138 (United States); Friend, Cynthia M. [Department of Chemistry, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138 (United States); School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138 (United States)

2012-09-15T23:59:59.000Z

182

RERTR-6 Irradiation Summary Report  

SciTech Connect (OSTI)

The Reduced Enrichment for Research and Test Reactor (RERTR) experiment RERTR-6 was designed to evaluate several modified fuel designs that were proposed to address the possibility of breakaway swelling due to porosity within the (U. Mo) Al interaction product observed in the full-size plate tests performed in Russia and France1. The following report summarizes the life of the RERTR-6 experiment through end of irradiation, including as-run neutronic analyses, thermal analyses and hydraulic testing results.

D. M. Perez; M. A. Lillo; G. S. Chang; G. A. Roth; N. E. Woolstenhulme; D. M. Wachs

2011-12-01T23:59:59.000Z

183

RERTR-13 Irradiation Summary Report  

SciTech Connect (OSTI)

The Reduced Enrichment for Research and Test Reactor (RERTR) experiment RERTR-13 was designed to assess performance of different types of neutron absorbers that can be potentially used as burnable poisons in the low enriched uranium-molybdenum based dispersion and monolithic fuels.1 The following report summarizes the life of the RERTR-13 experiment through end of irradiation, including as-run neutronic analysis results, thermal analysis results and hydraulic testing results.

D. M. Perez; M. A. Lillo; G. S. Chang; D. M. Wachs; G. A. Roth; N. E. Woolstenhulme

2012-09-01T23:59:59.000Z

184

Nuclear plant irradiated steel handbook  

SciTech Connect (OSTI)

This reference handbook presents selected information extracted from the EPRI reactor surveillance program database, which contains the results from surveillance program reports on 57 plants and 116 capsules. Tabulated data includes radiation induced temperature shifts, capsule irradiation conditions and statistical features of the Charpy V-notch curves. General information on the surveillance materials is provided and the Charpy V-notch energy results are presented graphically.

Oldfield, W.; Oldfield, F.M.; Lombrozo, P.M.; McConnell, P.

1986-09-01T23:59:59.000Z

185

http://umbra.nascom.nasa.gov/soho/ SOHO_final_report.html  

E-Print Network [OSTI]

TOPICPAGE #12;http://umbra.nascom.nasa.gov/soho/ SOHO_final_report.html SOHO MISSION INTERRUPTION FAILURE

Rhoads, James

186

NASA FY 2015 Budget Request FY 2014 FY 2015  

E-Print Network [OSTI]

NASA FY 2015 Budget Request Actuals FY 2013 Enacted FY 2014 FY 2015 Notional FY 2016 Notional FY's Fiscal Year 2015 budget supports investments that will ensure continued U.S. leadership in space, while 2017 Notional FY 2018 Notional FY 2019 $16.9B $17.6B $17.5B $17.6B $17.8B $18.0B $18.2B The President

187

Intern experience NASA Ames Research Center: an internship report  

E-Print Network [OSTI]

year 1986) and bringing the project in within budget. When contact was made with NASA Headquarters to inquire about early release of funds, the first response was a question as to why the project was five months behind schedule. A constraint... Code EEF. This project was assigned to Code EEE instead as a means of both broadening EEE's experience and reducing the workload of EEF. Further, the project required early design and bidding of the compressor system for the project which...

Steinle, Frank W.

2013-03-13T23:59:59.000Z

188

EPR Investigation of Irradiated Curry Powder  

SciTech Connect (OSTI)

Gamma-ray irradiated curry powder, a well priced oriental spice was investigated in order to establish the ability of EPR to detect the presence and time stability of free irradiation free-radicals. Accordingly, curry powder aliquots were irradiated with gradually increasing absorbed doses up to 11.3 kGy. The EPR spectra of all irradiated samples show the presence of al last two different species of free radicals, whose concentration increased monotonously with the absorbed doses. A 100 deg. C isothermal annealing of irradiated samples has shown a differential reduction of amplitude of various components of the initial spectra, but even after 3.6 h of thermal treatment, the remaining amplitude represents no less then 30% of the initial ones. The same peculiarities have been noticed after more than one year storage at room temperature, all of them being very useful in establishing the existence of any previous irradiation treatment.

Duliu, O. G.; Ali, S. I. [University of Bucharest, Department of Atomic and Nuclear Physics, P.O. Box MG-11, 077125 Bucharest (Romania); Georgescu, R. [National Institute for Physics and Nuclear Engineering-Horia Hulubei, P.O. Box MG-6, 077125 Bucharest (Romania)

2007-04-23T23:59:59.000Z

189

Irradiation Effects on Human Cortical Bone Fracture Behavior  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface ReactionsIrradiation Effects on Human

190

Irradiation Effects on Human Cortical Bone Fracture Behavior  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface ReactionsIrradiation Effects on

191

Irradiation Effects on Human Cortical Bone Fracture Behavior  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface ReactionsIrradiation Effects

192

Irradiation Effects on Microstructure Change in Nanocrystalline Ceria -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface ReactionsIrradiation

193

Sodium and potassium levels in the serum of acutely irradiated and non-irradiated rats  

E-Print Network [OSTI]

SODIUM AND POTASSIUM LEVELS IN THE SERUM OF ACUTELY IRRADIATED AND NON-IRRADIATED RATS A Thesis By DAVID PRESTON SHEPHERD Submitted to the Graduate College of the Texas ARM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 1967 Major Subject: Zoology SODIUM AND POTASSIUM LEVELS IN THE SERUM OF ACUTELY IRRADIATED AND NON-IRRADIATED RATS A Thesis By DAVID PRESTON SHEPHERD Approved as to style and content by: (Chairman of Committee) (Head...

Shepherd, David Preston

1967-01-01T23:59:59.000Z

194

Thermal Structure and Radius Evolution of Irradiated Gas Giant Planets  

E-Print Network [OSTI]

We consider the thermal structure and radii of strongly irradiated gas giant planets over a range in mass and irradiating flux. The cooling rate of the planet is sensitive to the surface boundary condition, which depends on the detailed manner in which starlight is absorbed and energy redistributed by fluid motion. We parametrize these effects by imposing an isothermal boundary condition $T \\equiv T_{\\rm deep}$ below the photosphere, and then constrain $T_{\\rm deep}$ from the observed masses and radii. We compute the dependence of luminosity and core temperature on mass, $T_{\\rm deep}$ and core entropy, finding that simple scalings apply over most of the relevant parameter space. These scalings yield analytic cooling models which exhibit power-law behavior in the observable age range $0.1-10 {\\rm Gyr}$, and are confirmed by time-dependent cooling calculations. We compare our model to the radii of observed transiting planets, and derive constraints on $T_{\\rm deep}$. Only HD 209458 has a sufficiently accurate radius measurement that $T_{\\rm deep}$ is tightly constrained; the lower error bar on the radii for other planets is consistent with no irradiation. More accurate radius and age measurements will allow for a determination of the correlation of $T_{\\rm deep}$ with the equilibrium temperature, informing us about both the greenhouse effect and day-night asymmetries.

Phil Arras; Lars Bildsten

2006-01-15T23:59:59.000Z

195

Effects of mass loss for highly-irradiated giant planets  

E-Print Network [OSTI]

We present calculations for the evolution and surviving mass of highly-irradiated extrasolar giant planets (EGPs) at orbital semimajor axes ranging from 0.023 to 0.057 AU using a generalized scaled theory for mass loss, together with new surface-condition grids for hot EGPs and a consistent treatment of tidal truncation. Theoretical estimates for the rate of energy-limited hydrogen escape from giant-planet atmospheres differ by two orders of magnitude, when one holds planetary mass, composition, and irradiation constant. Baraffe et al. (2004, A&A 419, L13-L16) predict the highest rate, based on the theory of Lammer et al. (2003, Astrophys. J. 598, L121-L124). Scaling the theory of Watson et al. (1981, Icarus 48, 150-166) to parameters for a highly-irradiated exoplanet, we find an escape rate ~102 lower than Baraffe's. With the scaled Watson theory we find modest mass loss, occurring early in the history of a hot EGP. In this theory, mass loss including the effect of Roche-lobe overflow becomes significant primarily for masses below a Saturn mass, for semimajor axes = 0.023 AU. This contrasts with the Baraffe model, where hot EGPs are claimed to be remnants of much more massive bodies, originally several times Jupiter and still losing substantial mass fractions at present.

W. B. Hubbard; M. F. Hattori; A. Burrows; I. Hubeny; D. Sudarsky

2006-10-27T23:59:59.000Z

196

Space charge modeling in electron-beam irradiated polyethylene: Fitting model and experiments  

SciTech Connect (OSTI)

A numerical model for describing charge accumulation in electron-beam irradiated low density polyethylene has been put forward recently. It encompasses the generation of positive and negative charges due to impinging electrons and their transport in the insulation. However, the model was not optimized to fit all the data available regarding space charge dynamics obtained using up-to-date pulsed electro-acoustic techniques. In the present approach, model outputs are compared with experimental space charge distribution obtained during irradiation and post-irradiation, the irradiated samples being in short circuit conditions or with the irradiated surface at a floating potential. A unique set of parameters have been used for all the simulations, and it encompasses the transport parameters already optimized for charge transport in polyethylene under an external electric field. The model evolution in itself consists in describing the recombination between positive and negative charges according to the Langevin formula, which is physically more accurate than the previous description and has the advantage of reducing the number of adjustable parameters of the model. This also provides a better description of the experimental behavior underlining the importance of recombination processes in irradiated materials.

Le Roy, S.; Laurent, C.; Teyssedre, G. [Universite de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), 118 route de Narbonne, F-31062 Toulouse cedex 9 (France); CNRS, LAPLACE, F-31062 Toulouse (France); Baudoin, F.; Griseri, V. [Universite de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), 118 route de Narbonne, F-31062 Toulouse cedex 9 (France)

2012-07-15T23:59:59.000Z

197

In Situ Optical Extinction Measurement for Locally Control of Surface Plasmon Resonance During Nanosecond Laser  

E-Print Network [OSTI]

nanosecond irradiation coupled with extinction measurement Total deposited fluence Fig. 2 Optical microscopyIn Situ Optical Extinction Measurement for Locally Control of Surface Plasmon Resonance During Nanosecond Laser Irradiation of Silver Ion Exchanged Silicate Glass Olivier Véron & Jean-Philippe Blondeau

198

Deuterium Depth Profile in Neutron-Irradiated Tungsten Exposed to Plasma  

SciTech Connect (OSTI)

The effect of radiation damage has been mainly simulated using high-energy ion bombardment. The ions, however, are limited in range to only a few microns into the surface. Hence, some uncertainty remains about the increase of trapping at radiation damage produced by 14 MeV fusion neutrons, which penetrate much farther into the bulk material. With the Japan-US joint research project: Tritium, Irradiations, and Thermofluids for America and Nippon (TITAN), the tungsten samples (99.99 % pure from A.L.M.T., 6mm in diameter, 0.2mm in thickness) were irradiated to high flux neutrons at 50 C and to 0.025 dpa in the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL). Subsequently, the neutron-irradiated tungsten samples were exposed to a high-flux deuterium plasma (ion flux: 1021-1022 m-2s-1, ion fluence: 1025-1026 m-2) in the Tritium Plasma Experiment (TPE) at the Idaho National Laboratory (INL). First results of deuterium retention in neutron-irradiated tungsten exposed in TPE have been reported previously. This paper presents the latest results in our on-going work of deuterium depth profiling in neutron-irradiated tungsten via nuclear reaction analysis. The experimental data is compared with the result from non neutron-irradiated tungsten, and is analyzed with the Tritium Migration Analysis Program (TMAP) to elucidate the hydrogen isotope behavior such as retention and depth distribution in neutron-irradiated and non neutron-irradiated tungsten.

Masashi Shimada; G. Cao; Y. Hatano; T. Oda; Y. Oya; M. Hara; P. Calderoni

2011-05-01T23:59:59.000Z

199

Nuclear Engineering Division Irradiated Materials Laboratory  

E-Print Network [OSTI]

Nuclear Engineering Division Irradiated Materials Laboratory The Irradiated Materials Laboratory (IML) in Argonne's Nuclear Engineering Division is used to conduct research on the behavior. #12;C O N TA C T > Dr. Michael C. Billone | 630-252-7146 | billone@anl.gov | Nuclear Engineering

Kemner, Ken

200

AGC-1 Irradiation Experiment Test Plan  

SciTech Connect (OSTI)

The Advanced Graphite Capsule (AGC) irradiation test program supports the acquisition of irradiated graphite performance data to assist in the selection of the technology to be used for the VHTR. Six irradiations are planned to investigate compressive creep in graphite subjected to a neutron field and obtain irradiated mechanical properties of vibrationally molded, extruded, and iso-molded graphites for comparison. The experiments will be conducted at three temperatures: 600, 900, and 1200C. At each temperature, two different capsules will be irradiated to different fluence levels, the first from 0.5 to 4 dpa and the second from 4 to 7 dpa. AGC-1 is the first of the six capsules designed for ATR and will focus on the prismatic fluence range.

R. L. Bratton

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Unusual Light in Dark Space Revealed by Los Alamos, NASA  

SciTech Connect (OSTI)

By looking at the dark spaces between visible galaxies and stars the NASA/JPL CIBER sounding rocket experiment has produced data that could redefine what constitutes a galaxy. CIBER, the Cosmic Infrared Background Experiment, is designed to understand the physics going on between visible stars and galaxies. The relatively small, sub-orbital rocket unloads a camera that snaps pictures of the night sky in near-infrared wavelengths, between 1.2 and 1.6 millionth of a meter. Scientists take the data and remove all the known visible stars and galaxies and quantify what is left.

Smidt, Joseph

2014-11-07T23:59:59.000Z

202

ARM - Field Campaign - ISDAC - NASA ARCTAS Coordination with ARM  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered‰PNGExperience4AJ01)3,CloudgovCampaignsIR Cloud Camera Feasibility Study ARM-- NASA

203

NASA Perspectives on Cryo H2 Storage | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOEToward a PeacefulDriving DemandSafetyKCA-4204 NASA JOHNNASA

204

NASA's Marshall Space Flight Center Improves Cooling System Performance |  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergy HealthCommentsAugust 2012 MonthlyYear ScheduleCodes @NASA

205

Unusual Light in Dark Space Revealed by Los Alamos, NASA  

ScienceCinema (OSTI)

By looking at the dark spaces between visible galaxies and stars the NASA/JPL CIBER sounding rocket experiment has produced data that could redefine what constitutes a galaxy. CIBER, the Cosmic Infrared Background Experiment, is designed to understand the physics going on between visible stars and galaxies. The relatively small, sub-orbital rocket unloads a camera that snaps pictures of the night sky in near-infrared wavelengths, between 1.2 and 1.6 millionth of a meter. Scientists take the data and remove all the known visible stars and galaxies and quantify what is left.

Smidt, Joseph

2015-01-05T23:59:59.000Z

206

Irradiation-induced defect clustering and amorphization in silicon...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Irradiation-induced defect clustering and amorphization in silicon carbide. Irradiation-induced defect clustering and amorphization in silicon carbide. Abstract: Previous computer...

207

Neutron Irradiation of Hydrided Cladding Material in HFIR Summary...  

Broader source: Energy.gov (indexed) [DOE]

Neutron Irradiation of Hydrided Cladding Material in HFIR Summary of Initial Activities Neutron Irradiation of Hydrided Cladding Material in HFIR Summary of Initial Activities...

208

Magnetization measurements and XMCD studies on ion irradiated...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

measurements and XMCD studies on ion irradiated iron oxide and core-shell ironiron-oxide nanomaterials. Magnetization measurements and XMCD studies on ion irradiated iron oxide...

209

Programmable surfaces  

E-Print Network [OSTI]

Robotic vehicles walk on legs, roll on wheels, are pulled by tracks, pushed by propellers, lifted by wings, and steered by rudders. All of these systems share the common character of momentum transport across their surfaces. ...

Sun, Amy (Amy Teh-Yu)

2012-01-01T23:59:59.000Z

210

NASA advanced refrigerator/freezer technology development project overview  

SciTech Connect (OSTI)

NASA Lewis Research Center (LeRC) has recently initiated a three-year project to develop the advanced refrigerator/freezer (R/F) technologies needed to support future life and biomedical sciences space experiments. Refrigerator/freezer laboratory equipment, most of which needs to be developed, is enabling to about 75 percent of the planned space station life and biomedical science experiments. These experiments will require five different classes of equipment; three storage freezers operating at -20 C, -70 C and less than 183 C, a -70 C freeze-dryer, and a cryogenic (less than 183 C) quick/snap freezer. This project is in response to a survey of cooling system technologies, performed by a team of NASA scientists and engineers. The team found that the technologies required for future R/F systems to support life and biomedical sciences spaceflight experiments, do not exist at an adequate state of development and concluded that a program to develop the advanced R/F technologies is needed. Limitations on spaceflight system size, mass, and power consumption present a significant challenge in developing these systems. This paper presents some background and a description of the Advanced R/F Technology Development Project, project approach and schedule, general description of the R/F systems, and a review of the major R/F equipment requirements.

Cairelli, J.E.

1995-03-01T23:59:59.000Z

211

AGC-1 Post Irradiation Examination Status  

SciTech Connect (OSTI)

The Next Generation Nuclear Plant (NGNP) Graphite R&D program is currently measuring irradiated material property changes in several grades of nuclear graphite for predicting their behavior and operating performance within the core of new Very High Temperature Reactor (VHTR) designs. The Advanced Graphite Creep (AGC) experiment consisting of six irradiation capsules will generate this irradiated graphite performance data for NGNP reactor operating conditions. All six AGC capsules in the experiment will be irradiated in the Advanced Test Reactor (ATR), disassembled in the Hot Fuel Examination Facility (HFEF), and examined at the INL Research Center (IRC) or Oak Ridge National Laboratory (ORNL). This is the first in a series of status reports on the progress of the AGC experiment. As the first capsule, AGC1 was irradiated from September 2009 to January 2011 to a maximum dose level of 6-7 dpa. The capsule was removed from ATR and transferred to the HFEF in April 2011 where the capsule was disassembled and test specimens extracted from the capsules. The first irradiated samples from AGC1 were shipped to the IRC in July 2011and initial post irradiation examination (PIE) activities were begun on the first 37 samples received. PIE activities continue for the remainder of the AGC1 specimen as they are received at the IRC.

David Swank

2011-09-01T23:59:59.000Z

212

AGR-1 Irradiation Experiment Test Plan  

SciTech Connect (OSTI)

This document presents the current state of planning for the AGR-1 irradiation experiment, the first of eight planned irradiations for the Advanced Gas Reactor (AGR) Fuel Development and Qualification Program. The objectives of the AGR-1 experiment are: 1. To gain experience with multi-capsule test train design, fabrication, and operation with the intent to reduce the probability of capsule or test train failure in subsequent irradiation tests. 2. To irradiate fuel produced in conjunction with the AGR fuel process development effort. 3. To provide data that will support the development of an understanding of the relationship between fuel fabrication processes, fuel product properties, and irradiation performance. In order to achieve the test objectives, the AGR-1 experiment will be irradiated in the B-10 position of the Advanced Test Reactor (ATR) at the Idaho National Laboratory (INL). The test will contain six independently controlled and monitored capsules. Each capsule will contain a single type, or variant, of the AGR coated fuel. The irradiation is planned for about 700 effective full power days (approximately 2.4 calendar years) with a time-averaged, volume-average temperature of approximately 1050 C. Average fuel burnup, for the entire test, will be greater than 17.7 % FIMA, and the fuel will experience fast neutron fluences between 2.4 and 4.5 x 1025 n/m2 (E>0.18 MeV).

John T. Maki

2009-10-01T23:59:59.000Z

213

RERTR-12 Insertion 2 Irradiation Summary Report  

SciTech Connect (OSTI)

The Reduced Enrichment for Research and Test Reactor (RERTR) experiment RERTR-12 was designed to provide comprehensive information on the performance of uranium-molybdenum (U-Mo) based monolithic fuels for research reactor applications.1 RERTR-12 insertion 2 includes the capsules irradiated during the last three irradiation cycles. These capsules include Z, Y1, Y2 and Y3 type capsules. The following report summarizes the life of the RERTR-12 insertion 2 experiment through end of irradiation, including as-run neutronic analysis results, thermal analysis results and hydraulic testing results.

D. M. Perez; G. S. Chang; D. M. Wachs; G. A. Roth; N. E. Woolstenhulme

2012-09-01T23:59:59.000Z

214

Measuring Degradation Rates Without Irradiance Data  

SciTech Connect (OSTI)

A method to report PV system degradation rates without using irradiance data is demonstrated. First, a set of relative degradation rates are determined by comparing daily AC final yields from a group of PV systems relative to the average final yield of all the PV systems. Then, the difference between relative and absolute degradation rates is found from a statistical analysis. This approach is verified by comparing to methods that utilize irradiance data. This approach is significant because PV systems are often deployed without irradiance sensors, so the analysis method described here may enable measurements of degradation using data that were previously thought to be unsuitable for degradation studies.

Pulver, S.; Cormode, D.; Cronin, A.; Jordan, D.; Kurtz, S.; Smith, R.

2011-02-01T23:59:59.000Z

215

NASA's Marshall Space Flight Center Saves Water With High-Efficiency...  

Broader source: Energy.gov (indexed) [DOE]

NASA's Marshall Space Flight Center Saves Water With High-Efficiency Toilet and Urinal Program: Best Management Practice Case Study 6 - Toilets and Urinals (Fact Sheet), Federal...

216

Y-12 to help create fuel for NASA's long-range space exploration...  

National Nuclear Security Administration (NNSA)

help create fuel for NASA's long-range space exploration missions | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the...

217

Blue photoluminescence enhancement in laser-irradiated 6H-SiC at room temperature  

SciTech Connect (OSTI)

Blue photoluminescence (PL) of 6H-SiC irradiated by an ultraviolet laser can be observed at room temperature in dark condition. PL spectra with Gaussian fitting curve of the irradiated SiC show that blue luminescence band (?440?nm) is more pronounced than other bands. The blue PL enhancement is the combined result of the improved shallow N-donor energy level and the unique surface state with Si nanocrystals and graphene/Si composite due to the effect of photon energy input by the short-wavelength laser irradiation. The study can provide a promising route towards the preparation of well-controlled blue photoluminescence material for light-emitting devices.

Wu, Yan; Ji, Lingfei, E-mail: ncltji@bjut.edu.cn; Lin, Zhenyuan; Jiang, Yijian [Institute of Laser Engineering, Beijing University of Technology, Beijing 100124 (China); Zhai, Tianrui [College of Applied Science, Beijing University of Technology, Beijing 100124 (China)

2014-01-27T23:59:59.000Z

218

Introduction The bay scallop, Argopecten irradi-  

E-Print Network [OSTI]

71(3) 17 Introduction The bay scallop, Argopecten irradi- ans amplicostatus, has been present (Garcia-Cubas, 1968). Historical Uses Mollusks were used by the pre-Co- lumbian cultures in Mexico as food

219

Selective irradiation of the vascular endothelium  

E-Print Network [OSTI]

We developed a unique methodology to selectively irradiate the vascular endothelium in vivo to better understand the role of vascular damage in causing normal tissue radiation side-effects.The relationship between vascular ...

Schuller, Bradley W

2007-01-01T23:59:59.000Z

220

Processing Irradiated Beryllium For Disposal  

SciTech Connect (OSTI)

The purpose of this research was to develop a process for decontaminating irradiated beryllium that will allow it to be disposed of through normal radwaste channels. Thus, the primary objectives of this ongoing study are to remove the transuranic (TRU) isotopes to less than 100 nCi/g and remove {sup 60}Co, and {sup 137}Cs, to levels that will allow the beryllium to be contact handled. One possible approach that appears to have the most promise is aqueous dissolution and separation of the isotopes by selected solvent extraction followed by precipitation, resulting in a granular form for the beryllium that may be fixed to prevent it from becoming respirable and therefore hazardous. Beryllium metal was dissolved in nitric and fluorboric acids. Isotopes of {sup 241}Am, {sup 239}Pu, {sup 85}Sr, and {sup 137}Cs were then added to make a surrogate beryllium waste solution. A series of batch contacts was performed with the spiked simulant using chlorinated cobalt dicarbollide (CCD) and polyethylene glycol diluted with sulfone to extract the isotopes of Cs and Sr. Another series of batch contacts was performed using a combination of octyl (phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) in tributyl phosphate (TBP) diluted with dodecane for extracting the isotopes of Pu and Am. The results indicate that greater than 99.9% removal can be achieved for each isotope with only three contact stages.

T. J. Tranter; R. D. Tillotson; N. R. Mann; G. R. Longhurst

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Neutron Irradiation Measurement for Superconducting Magnet  

E-Print Network [OSTI]

close to reactor core Sample cool down by He gas loop: 10K 20K Fast neutron flux (En>0.1MeV): 1.4x. Materials, 49, p161 (1973&74) Reactor n on Al Reactor n on Cu fluence up to 2*1022 n/m2 (En>0.1MeV) RRR Irradiation at KUR Kyoto Univ. Research Reactor Institute MW max. thermal power Irradiation cryostat

McDonald, Kirk

222

Atomistic simulation of Er irradiation induced defects in GaN nanowires  

SciTech Connect (OSTI)

Classical molecular dynamics simulation was used to irradiate a GaN nanowire with rear-earth erbium (Er). Ten cumulative irradiations were done using an ion energy of 37.5?keV on a 10??10?nm{sup 2} surface area which corresponds to a fluence of 1??10{sup 13?}cm{sup ?2}. We studied the location and types of defects produced in the irradiation. Er implantation leads to a net positive (expansion) strain in the nanowire and especially at the top region a clear expansion has been observed in the lateral and axial directions. The lattice expansion is due to the hydrostatic strain imposed by a large number of radiation induced defects at the top of the NW. Due to the large surface-to-volume ratio, most of the defects were concentrated at the surface region, which suggests that the experimentally observed yellow luminescence (YL) in ion implanted GaN NWs arises from surface defects. We observed big clusters of point defects and vacancy clusters which are correlated with stable lattice strain and the YL band, respectively.

Ullah, M. W., E-mail: mohammad.ullah@helsinki.fi; Kuronen, A.; Djurabekova, F.; Nordlund, K. [Department of Physics, University of Helsinki, P.O. Box 64, FIN-00014 (Finland); Stukowski, A. [Technische Universitt Darmstadt, 64287 Darmstadt (Germany)

2014-09-28T23:59:59.000Z

223

Nano-Scale Fission Product Phases in an Irradiated U-7Mo Alloy Nuclear Fuel  

SciTech Connect (OSTI)

Irradiated nuclear fuel is a very difficult material to characterize. Due to the large radiation fields associated with these materials, they are hard to handle and typically have to be contained in large hot cells. Even the equipment used for performing characterization is housed in hot cells or shielded glove boxes. The result is not only a limitation in the techniques that can be employed for characterization, but also a limitation in the size of features that can be resolved The most standard characterization techniques include light optical metallography (WM), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA). These techniques are applied to samples that are typically prepared using grinding and polishing approaches that will always generate some mechanical damage on the sample surface. As a result, when performing SEM analysis, for example, the analysis is limited by the quality of the sample surface that can be prepared. However, a new approach for characterizing irradiated nuclear fuel has recently been developed at the Idaho National Laboratory (INL) in Idaho Falls, Idaho. It allows for a dramatic improvement in the quality of characterization that can be performed when using an instrument like an SEM. This new approach uses a dual-beam scanning microscope, where one of the beams isa focused ion beam (FIB), which can be used to generate specimens of irradiated fuel (-10m x 10m) for microstructural characterization, and the other beam is the electron beam of an SEM. One significant benefit of this approach is that the specimen surface being characterized has received much less damage (and smearing) than is caused by the more traditional approaches, which enables the imaging of nanometer sized microstructural features in the SEM. The process details are for an irradiated low-enriched uranium (LEU) U-Mo alloy fuel Another type of irradiated fuel that has been characterized using this technique is a mixed oxide fuel.

Dennis Keiser, Jr.; Brandon Miller; James Madden; Jan-Fong Jue; Jian Gan

2014-09-01T23:59:59.000Z

224

Comparison of Deuterium Retention for Ion-irradiated and Neutron-irradiated Tungsten  

SciTech Connect (OSTI)

The behavior of D retention for Fe{sup 2+}-irradiated tungsten with a damage of 0.025-3 dpa was compared with that for neutron-irradiated tungsten with 0.025 dpa. The D{sub 2} thermal desorption spectroscopy (TDS) spectra for Fe{sup 2+}-irradiated tungsten consisted of two desorption stages at 450 and 550 K, while that for neutron-irradiated tungsten was composed of three stages and an addition desorption stage was found at 750 K. The desorption rate of the major desorption stage at 550K increased as the displacement damage increased due to Fe{sup 2+} irradiation increasing. In addition, the first desorption stage at 450K was found only for damaged samples. Therefore, the second stage would be based on intrinsic defects or vacancy produced by Fe{sup 2+} irradiation, and the first stage should be the accumulation of D in mono-vacancy and the activation energy would be relatively reduced, where the dislocation loop and vacancy is produced. The third one was found only for neutron irradiation, showing the D trapping by a void or vacancy cluster, and the diffusion effect is also contributed to by the high full-width at half-maximum of the TDS spectrum. Therefore, it can be said that the D{sub 2} TDS spectra for Fe{sup 2+}-irradiated tungsten cannot represent that for the neutron-irradiated one, indicating that the deuterium trapping and desorption mechanism for neutron-irradiated tungsten is different from that for the ion-irradiated one.

Yasuhisa Oya; Masashi Shimada; Makoto Kobayashi; Takuji Oda; Masanori Hara; Hideo Watanabe; Yuji Hatano; Pattrick Calderoni; Kenji Okuno

2011-12-01T23:59:59.000Z

225

Effectively Addressing NASA's Organizational and Safety Culture: Insights from Systems Safety and Engineering Systems1  

E-Print Network [OSTI]

to what were termed organizational and safety culture issues, but more work is needed if leaders at NASA1 Effectively Addressing NASA's Organizational and Safety Culture: Insights from Systems Safety, Nicolas Dulac, Lydia Fraile, Karen Marais MIT 1.0 Introduction Safety is an emergent, system property

de Weck, Olivier L.

226

REQUEST FOR INFORMATION -NASA OFFICE OF THE CHIEF TECHNOLOGIST EARLY STAGE  

E-Print Network [OSTI]

/eps/bizops.cgi?gr=D&pin=04#143326 Office Address NASA/Goddard Space Flight Center, NASA Headquarters Acquisition Branch, Code Space technology being sought in this Program deals with the design, modeling, operation, maintenance, repair, testing, and reliability of any of the components and systems of both manned and robotic

Christian, Eric

227

Houston, We Have a Success Story: Technology Transfer at the NASA IV&V Facility  

E-Print Network [OSTI]

Houston, We Have a Success Story: Technology Transfer at the NASA IV&V Facility Ken McGill, Wes of and technology transfer from NASA's research program in Independent Verification and Validation (IV, Verification. Keywords Technology transfer, Independent Verification and Validation, Research. 1. INTRODUCTION

Dekhtyar, Alexander

228

NASA FY 2015 Budget Request for Science Actuals Enacted Notional Notional Notional Notional  

E-Print Network [OSTI]

NASA FY 2015 Budget Request for Science Actuals Enacted Notional Notional Notional Notional 1 FY,123M $5,174M The FY 2015 budget provides $4,972 million to the Science Mission Directorate. The budget accounts. 8-1 #12;NASA FY 2015 Budget Request for Aeronautics Research Actuals Enacted Notional Notional

Waliser, Duane E.

229

National Aeronautics and Space Administration NASA's FY 2015 Management and Performance  

E-Print Network [OSTI]

TO PERFORMANCE MANAGEMENT conduct the Agency's day-to-day work. Figure 1 depicts NASA's organizational structure National Aeronautics and Space Administration NASA's FY 2015 Management and Performance Governance and Strategic Management Management Priorities and Challenges FY 2014 Performance Plan Update FY

Waliser, Duane E.

230

NASA EG-2000-03-002-GSFC Exploring the Aurora and the Ionosphere 1 Educational Product  

E-Print Network [OSTI]

NASA EG-2000-03-002-GSFC Exploring the Aurora and the Ionosphere 1 Educational Product Educators#DQG#Aurora and the Ionosphere An Educator Guide with Activities in Space Science #12;NASA EG-2000-03-002-GSFC Exploring the Aurora and the Ionosphere 2 Solar Storms and You! is available in electronic for

231

NASA OFFICE OF INSPECTOR GENERAL SUITE 8U37, 300 E ST SW  

E-Print Network [OSTI]

, Commercial Crew Transportation, and the Space Launch System Managing NASA's Science Portfolio Ensuring.1 billion in unfunded environmental liabilities. Soil and groundwater cleanup costs for one project alone, 2014 TO: Charles F. Bolden, Jr. Administrator SUBJECT: 2014 Report on NASA's Top Management

Waliser, Duane E.

232

AiR surface: AiR surface 1  

E-Print Network [OSTI]

AiR surface: 1 PDA AiR surface 1 1: AiR surface () () 2 [1] [2] 3 AiR surface AiR surface surface surface surface 3.1 surface [3]( 3 ) surface 3.2 surface surface AiR surface 4 AiR surface surface AiR surface: Virtual Touch Panel

Tanaka, Jiro

233

Low-temperature formation of epitaxial graphene on 6H-SiC induced by continuous electron beam irradiation  

SciTech Connect (OSTI)

It is observed that epitaxial graphene forms on the surface of a 6H-SiC substrate by irradiating electron beam directly on the sample surface in high vacuum at relatively low temperature ({approx}670 Degree-Sign C). The symmetric shape and full width at half maximum of 2D peak in the Raman spectra indicate that the formed epitaxial graphene is turbostratic. The gradual change of the Raman spectra with electron beam irradiation time increasing suggests that randomly distributed small grains of epitaxial graphene form first and grow laterally to cover the entire irradiated area. The sheet resistance of epitaxial graphene film is measured to be {approx}6.7 k{Omega}/sq.

Go, Heungseok; Jeon, Youngeun; Park, Kibog [School of Electrical and Computer Engineering, KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798 (Korea, Republic of); Kwak, Jinsung; Yoo, Jung-Woo; Youb Kim, Sung; Kwon, Soon-Yong [School of Mechanical and Advanced Materials Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798 (Korea, Republic of); Kim, Sung-Dae; Kim, Young-Woon [Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Korea, Republic of); Cheol Lee, Byung; Suk Kang, Hyun [Quantum Optics Laboratory, Korea Atomic Energy Research Institute, Daejeon 305-353 (Korea, Republic of); Ko, Jae-Hyeon [Department of Physics, Hallym University, Chuncheon Gangwondo 200-702 (Korea, Republic of); Kim, Nam [Division of Convergence Technology, Korea Research Institute of Standards and Science, Daejeon 305-340 (Korea, Republic of); Kim, Bum-Kyu [Department of Physics, Chonbuk National University, Jeonju Chonbuk 561-756 (Korea, Republic of)

2012-08-27T23:59:59.000Z

234

A Monthly Safety Bulletin The Office of the NASA  

E-Print Network [OSTI]

at taxiway A. I instructed X to abort his takeoff. Due to the amount of construction, we are forced to [get vehicles across] active runways hundreds of times daily. Another problem that surfaces near airport work problems with airport construction area signage and surface markings. Temporary or painted- over markings

235

The effect of neutron irradiation on silicon carbide fibers  

SciTech Connect (OSTI)

Nine types of SiC fiber have been exposed to neutron radiation in the Advanced Test Reactor at 250 C for various lengths of time ranging from 83 to 128 days. The effects of these exposures have been initially determined using scanning electron microscopy. The fibers tested were Nicalon{trademark} CG, Tyranno, Hi-Nicalon{trademark}, Dow Corning SiC, Carborundum SiC, Textron SCS-6, polymethysilane (PMS) derived SiC from the University of Michigan, and two types of MER SiC fiber. This covers a range of fibers from widely used commercial fibers to developmental fibers. Consistent with previous radiation experiments, Nicalon fiber was severely degraded by the neutron irradiation. Similarly, Tyranno suffered severe degradation. The more advanced fibers which approach the composition and properties of SiC performed well under irradiation. Of these, the Carborundum SiC fiber appeared to perform the best. The Hi-Nicalon and Dow Corning Fibers exhibited good general stability, but also appear to have some surface roughening. The MER fibers and the Textron SCS-6 fibers both had carbon cores which adversely influenced the overall stability of the fibers.

Newsome, G.A. [Lockheed Martin Corp., Schenectady, NY (United States)

1997-01-01T23:59:59.000Z

236

Plasma-Surface Interactions on Liquids  

SciTech Connect (OSTI)

Liquid plasma-facing surfaces have been suggested as an option for advanced fusion devices, particularly in regions where solid materials may not survive over long operating periods. Because liquid surfaces can be replenished, they offer the possibility of tolerating intense particle bombardment and of recovering from off-normal events. As a preliminary step in understanding the nature of plasma-surface interactions on liquids, the authors consider some of the surface processes occurring in liquids undergoing irradiation by energetic particles. These include (1) sputtering, (2) segregation of liquid component species and impurities, (3) evaporation, and (4) trapping and release of incident particles. Aspects of these processes are examined for several candidate liquids, which represent three types of low-Z liquids: pure metals (Li), metallic alloys (Sn-Li), and compound insulators (Li{sub 2}BeF{sub 4}).

R. Bastasz; W. Eckstein

2000-05-01T23:59:59.000Z

237

E-Print Network 3.0 - additive irradiation procedures Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

irradiation procedures Search Powered by Explorit Topic List Advanced Search Sample search results for: additive irradiation procedures Page: << < 1 2 3 4 5 > >> 1 IRRADIANCE MAPS...

238

Wallops Flight Facility (WFF) Agency Introduction: The FY 2012 budget request for NASA is $18.7 billion, the FY 2010 enacted  

E-Print Network [OSTI]

for NASA, as well as missions for national security and commercial industry. NASA Wallops is NASA's primary organizations develop small satellite systems and advanced technologies that enable more capable and lower

239

The seasonal dynamics of Arctic surface hydrology in permafrost environments  

E-Print Network [OSTI]

understanding of permafrost surface hydrology. The free access to extensive archives of satellite data through the European Space Agencey (ESA) as well as the National Aeronau- tics and Space Administration (NASA) has become vital. Most importantly, access... support throughout my time at the Scott Polar Research Institute (SPRI). At the beginning of my studies I was privileged to secure a DOC-fFORTE [Women in Research and Technology] Fellowship of the Austrian Academy of Sciences (AW). I would like to thank...

Trofaier, Anna Maria

2014-11-11T23:59:59.000Z

240

Robotic Communication A white paper prepared for NASA by  

E-Print Network [OSTI]

by a Wireless Surface Local Area Network (WSLAN) consisting of small solar-powered communication towers, affordable, and flexible exploration of the solar system. However, current space communication systems

Liberatore, Vincenzo

Note: This page contains sample records for the topic "irradiance nasa surface" 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

A novel way of detecting transient cavitation near a solid surface during megasonic cleaning using electrochemical impedance spectroscopy  

E-Print Network [OSTI]

A novel way of detecting transient cavitation near a solid surface during megasonic cleaning using Keywords: Megasonic cleaning Transient cavitation Acoustic streaming Microelectrode Electrochemical to transient cavitation. Development of a method to monitor transient cavitation events in solutions irradiated

Deymier, Pierre

242

Horizontal modular dry irradiated fuel storage system  

DOE Patents [OSTI]

A horizontal, modular, dry, irradiated fuel storage system (10) includes a thin-walled canister (12) for containing irradiated fuel assemblies (20), which canister (12) can be positioned in a transfer cask (14) and transported in a horizontal manner from a fuel storage pool (18), to an intermediate-term storage facility. The storage system (10) includes a plurality of dry storage modules (26) which accept the canister (12) from the transfer cask (14) and provide for appropriate shielding about the canister (12). Each module (26) also provides for air cooling of the canister (12) to remove the decay heat of the irradiated fuel assemblies (20). The modules (26) can be interlocked so that each module (26) gains additional shielding from the next adjacent module (26). Hydraulic rams (30) are provided for inserting and removing the canisters (12) from the modules (26).

Fischer, Larry E. (Los Gatos, CA); McInnes, Ian D. (San Jose, CA); Massey, John V. (San Jose, CA)

1988-01-01T23:59:59.000Z

243

Laboratory for Characterization of Irradiated Graphite  

SciTech Connect (OSTI)

The newly completed Idaho National Laboratory (INL) Carbon Characterization Laboratory (CCL) is located in Labs C19 and C20 of the Idaho National Laboratory Research Center (IRC). The CCL was established under the Next Generation Nuclear Plant (NGNP) Project to support graphite and ceramic composite research and development activities. The research is in support of the Advanced Graphite Creep (AGC) experiment a major material irradiation experiment within the NGNP Graphite program. The CCL is designed to characterize and test low activated irradiated materials such as high purity graphite, carbon-carbon composites, and silicon-carbide composite materials. The laboratory is fully capable of characterizing material properties for both irradiated and nonirradiated materials.

Karen A. Moore

2010-03-01T23:59:59.000Z

244

Irradiation creep of vanadium-base alloys.  

SciTech Connect (OSTI)

A study of irradiation creep in vanadium-base alloys is underway with experiments in the Advanced Test Reactor (ATR) and the High Flux Isotope Reactor (HFIR) in the US. Test specimens are thin-wall sealed tubes with internal pressure loading. The results from the initial ATR irradiation at low temperature (200-300 C) to a neutron damage level of 4.7 dpa show creep rates ranging from {approx}0 to 1.2 x 10{sup {minus}5}/dpa/MPa for a 500-kg heat of V-4Cr-4Ti alloy. These rates were generally lower than reported from a previous experiment in BR-10. Because both the attained neutron damage levels and the creep strains were low in the present study, however, these creep rates should be regarded as only preliminary. Substantially more testing is required before a data base on irradiation creep of vanadium alloys can be developed and used with confidence.

Tsai, H.; Matsui, H.; Billone, M. C.; Strain, R. V.; Smith, D. L.

1998-05-18T23:59:59.000Z

245

Irradiation effects on borosilicate waste glasses  

SciTech Connect (OSTI)

The effects of alpha decay on five borosilicate glasses containing simulated nuclear high-level waste oxides were studied. Irradiations carried out at room temperature were achieved by incorporating 1 to 8 wt % /sup 244/Cm/sub 2/O/sub 3/ in the glasses. Density changes and stored-energy build-up saturated at doses less than 2 x 10/sup 21/ alpha decays/kg. Damage manifested by stored energy was completely annealed at 633/sup 0/K. Positive and negative density changes were observed which never exceeded 1%. Irradiation had very little effect on mechanical strength or on chemical durability as measured by aqueous leach rates. Also, no effects were observed on the microstructure for vitreous waste glasses, although radiation-induced microcracking could be achieved on specimens that had been devitrified prior to irradiation.

Roberts, F.P.

1980-06-01T23:59:59.000Z

246

Heavy ion irradiation of crystalline water ice  

E-Print Network [OSTI]

Under cosmic irradiation, the interstellar water ice mantles evolve towards a compact amorphous state. Crystalline ice amorphisation was previously monitored mainly in the keV to hundreds of keV ion energies. We experimentally investigate heavy ion irradiation amorphisation of crystalline ice, at high energies closer to true cosmic rays, and explore the water-ice sputtering yield. We irradiated thin crystalline ice films with MeV to GeV swift ion beams, produced at the GANIL accelerator. The ice infrared spectral evolution as a function of fluence is monitored with in-situ infrared spectroscopy (induced amorphisation of the initial crystalline state into a compact amorphous phase). The crystalline ice amorphisation cross-section is measured in the high electronic stopping-power range for different temperatures. At large fluence, the ice sputtering is measured on the infrared spectra, and the fitted sputtering-yield dependence, combined with previous measurements, is quadratic over three decades of electronic ...

Dartois, E; Boduch, P; Brunetto, R; Chabot, M; Domaracka, A; Ding, J J; Kamalou, O; Lv, X Y; Rothard, H; da Silveira, E F; Thomas, J C

2015-01-01T23:59:59.000Z

247

Effect of low energy ion irradiation on CdTe crystals: Luminescence enhancement  

SciTech Connect (OSTI)

In this work we show that low energy ion sputtering is a very efficient technique as a cleaning process for CdTe substrates. We demonstrate, by using several techniques like grazing-angle x-ray diffraction, cathodoluminescence, microluminescence, and micro-Raman spectroscopy that the luminescent properties of CdTe substrates can be very much increased when CdTe surfaces are irradiated with low energy Argon ions. We postulate that this enhancement is mainly due to the removal of surface damage induced by the cutting and polishing processes. The formation of a low density of nonluminescent aggregates after the sputtering process has also been observed.

Olvera, J.; Plaza, J. L.; Dios, S. de; Dieguez, E. [Departamento de Fisica de Materiales, Laboratorio de Crecimiento de Cristales, Facultad de Ciencias, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); Martinez, O.; Avella, M. [Departamento Fisica Materia Condensada, GdS-Optronlab Group, Universidad de Valladolid, Edificio I-D, Paseo de Belen 1, 47011 Valladolid (Spain)

2010-12-15T23:59:59.000Z

248

Heavy-Section Steel Irradiation Program  

SciTech Connect (OSTI)

Maintaining the integrity of the reactor pressure vessel (RPV) in a light-water-cooled nuclear power plant is crucial in preventing and controlling severe accidents that have the potential for major contamination release. Because the RPV is the only key safety-related component of the plant for which a redundant backup system does not exist, it is imperative to fully understand the degree of irradiation-induced degradation of the RPV's fracture resistance that occurs during service. For this reason, the Heavy-Section Steel Irradiation (HSSI) Program has been established.

Rosseel, T.M.

2000-04-01T23:59:59.000Z

249

Gamma irradiation of the prenatal mouse dentition  

E-Print Network [OSTI]

as the dental lamina to the stage of the deposition of enamel and dentin. The purpose of this study was to determine the effect of a continuous stress of gamma irradiation on the structure of the odontogenic cells, the relative size and rate of development... development. In 1927, Leist (9) made a study of the effect of X-rays on teeth, which was brought about by the following rase. A worker in a Roentgen tube factory was exposed daily to a considerable dose of X-irradiation. Sometime later he began to show...

Kerley, Michael Auston

1969-01-01T23:59:59.000Z

250

Effects of neutron flux and irradiation temperature on irradiation embrittlement of A533B steels  

SciTech Connect (OSTI)

Irradiation embrittlement of A533B steels with low copper contents were investigated from the point of dose rate and irradiation temperature effects. Change of neutron flux in the range from {minus}10{sup 12} to {minus}10{sup 13} n/cm{sup 2}/s (E > 1 MeV) did not have a significant effect on the embrittlement. Irradiation temperature change of 1 C resulted in the transition temperature shift ({Delta}T{sub 41J}) of about 1 C and yield stress change ({Delta}{sigma}{sub y}) of about 0.8 MPa. Factors that might affect the embrittlement of low copper steels are also discussed.

Suzuki, Masahide; Onizawa, Kunio; Kizaki, Minoru [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan)

1996-12-31T23:59:59.000Z

251

Fructolysis in the semen of continuously irradiated and non-irradiated goats  

E-Print Network [OSTI]

Abbott showed that the androgenic activity of the testis is far more resistant to x- ray irradiation than is the germinal epi- 1 thelium. When Abbott administered 5, 000 and 10, OOOR to rats, he found no decrease in the sex accessory organ weights nor.... Another point which supports the data that the damaged spermatogonia give rise to subnormal sperm is 23 the studies done with in vitro sperm that have been irradiated. Man 15 stated that irradiation of whole, fresh semen has little or no effect...

Ziller, Henry Hubert

1966-01-01T23:59:59.000Z

252

Understanding the Irradiation Behavior of Zirconium Carbide  

SciTech Connect (OSTI)

Zirconium carbide (ZrC) is being considered for utilization in high-temperature gas-cooled reactor fuels in deep-burn TRISO fuel. Zirconium carbide possesses a cubic B1-type crystal structure with a high melting point, exceptional hardness, and good thermal and electrical conductivities. The use of ZrC as part of the TRISO fuel requires a thorough understanding of its irradiation response. However, the radiation effects on ZrC are still poorly understood. The majority of the existing research is focused on the radiation damage phenomena at higher temperatures (>450{degree}C) where many fundamental aspects of defect production and kinetics cannot be easily distinguished. Little is known about basic defect formation, clustering, and evolution of ZrC under irradiation, although some atomistic simulation and phenomenological studies have been performed. Such detailed information is needed to construct a model describing the microstructural evolution in fast-neutron irradiated materials that will be of great technological importance for the development of ZrC- based fuel. The goal of the proposed project is to gain fundamental understanding of the radiation-induced defect formation in zirconium carbide and irradiation response (ZrC) by using a combination of state-of-the-art experimental methods and atomistic modeling. This project will combine (1) in situ ion irradiation at a specialized facility at a national laboratory, (2) controlled temperature proton irradiation on bulk samples, and (3) atomistic modeling to gain a fundamental understanding of defect formation in ZrC. The proposed project will cover the irradiation temperatures from cryogenic temperature to as high as 800{degree}C, and dose ranges from 0.1 to 100 dpa. The examination of this wide range of temperatures and doses allows us to obtain an experimental data set that can be effectively used to exercise and benchmark the computer calculations of defect properties. Combining the examination of radiation-induced microstructures mapped spatially and temporally, microstructural evolution during post-irradiation annealing, and atomistic modeling of defect formation and transport energetics will provide new, critical understanding about property changes in ZrC. The behavior of materials under irradiation is determined by the balance between damage production, defect clustering, and lattice response. In order to predict those effects at high temperatures so targeted testing can be expanded and extrapolated beyond the known database, it is necessary to determine the defect energetics and mobilities as these control damage accumulation and annealing. In particular, low-temperature irradiations are invaluable for determining the regions of defect mobility. Computer simulation techniques are particularly useful for identifying basic defect properties, especially if closely coupled with a well-constructed and complete experimental database. The close coupling of calculation and experiment in this project will provide mutual benchmarking and allow us to glean a deeper understanding of the irradiation response of ZrC, which can then be applied to the prediction of its behavior in reactor conditions.

Motta, Arthur; Sridharan, Kumar; Morgan, Dane; Szlufarska, Izabela

2013-10-11T23:59:59.000Z

253

Response of Strontium Titanate to Ion and Electron Irradiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Strontium Titanate to Ion and Electron Irradiation. Response of Strontium Titanate to Ion and Electron Irradiation. Abstract: Response of strontium titanate (SrTiO3) to ion and...

254

Irradiation Stability of Carbon Nanotubes and Related Materials  

E-Print Network [OSTI]

defect annealing at elevated irradiation temperatures, which delays the formation of amorphous regions. Investigation of nanotube stability after various processing techniques and irradiation indicated that radiation response of CNTs in a composite...

Aitkaliyeva, Assel 1985-

2012-09-28T23:59:59.000Z

255

E-Print Network 3.0 - accelerated hyperfractionated irradiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Group Collection: Physics 79 Irradiation of Nd-Fe-B Permanent Magnets with APS Bending Magnet X-rays and 60 Summary: of 260 Mrad was used to irradiate Nd-Fe-B sample magnets with...

256

Evolution of ion-induced nanoparticle arrays on GaAs surfaces  

SciTech Connect (OSTI)

We have examined the evolution of irradiation-induced Ga nanoparticle (NP) arrays on GaAs surfaces. Focused-ion-beam irradiation of pre-patterned GaAs surfaces induces monotonic increases in the NP volume and aspect ratio up to a saturation ion dose, independent of NP location within the array. Beyond the saturation ion dose, the NP volume continues to increase monotonically while the NP aspect ratio decreases monotonically. In addition, the NP volumes (aspect ratios) are highest (lowest) for the corner NPs. We discuss the relative influences of bulk and surface diffusion on the evolution of Ga NP arrays.

Kang, M.; Al-Heji, A. A.; Shende, O.; Huang, S.; Jeon, S.; Goldman, R. S., E-mail: rsgold@umich.edu [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States); Beskin, I. [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)

2014-05-05T23:59:59.000Z

257

Effects of swift heavy ions irradiation parameters on optical properties of muscovite mica  

E-Print Network [OSTI]

Muscovite mica sheets with a thickness of 25 {\\mu}m were irradiated by various kinds of swift heavy ions (Sn, Xe and Bi) in HIRFL. The fluences ranged from 1$\\times$10^{10} ions/cm^2 to 8$\\times$10^{11} ions/cm^2. The electronic energy loss (dE/dx)_e was increased from 14.7 keV/nm to 31.2 keV/nm. The band gap and Urbach energy of pristine and irradiated mica were analyzed by ultraviolet- visible spectroscopy. Periodic fringes in long wave length of the absorption spectra caused by interference phenomenon, were disturbed as the (dE/dx)_e increased. It was suggested that the chemical bonds between Tetrahedral-Octohedral-Tetrahedral (TOT) layers of mica were destroyed. Thus the smooth surface was cleaved after irradiation. The band gap was narrowed down with the increasing (dE/dx)_e and fluences. The values of Urbach energy were increased as the (dE/dx)_e and fluences gradually increased. It was indicated that the amount of defects and the proportion of amorphous structure were increased in mica irradiated under...

Zhang, Sheng-Xia; Zeng, Jian; Song, Yin; Mo, Dan; Yao, Hui-Jun; Duan, Jing-Lai; Sun, You-Mei; Hou, Ming-Dong

2014-01-01T23:59:59.000Z

258

Implementation Plan for the Irradiated Materials Characterization Laboratory (IMCL)  

SciTech Connect (OSTI)

This document contains details regarding the planned implementation of the Irradiated Materials Characterization Laboratory at the INL.

Not Listed

2013-04-01T23:59:59.000Z

259

Coexistence of Two- and Three-dimensional Shubnikov-de Haas Oscillations in Ar^+ -irradiated KTaO_3  

SciTech Connect (OSTI)

We report the electron doping in the surface vicinity of KTaO{sub 3} by inducing oxygen-vacancies via Ar{sup +}-irradiation. The doped electrons have high mobility (> 10{sup 4} cm{sup 2}/Vs) at low temperatures, and exhibit Shubnikov-de Haas oscillations with both two- and three-dimensional components. A disparity of the extracted in-plane effective mass, compared to the bulk values, suggests mixing of the orbital characters. Our observations demonstrate that Ar{sup +}-irradiation serves as a flexible tool to study low dimensional quantum transport in 5d semiconducting oxides.

Harashima, S.; Bell, C.; Kim, M.; Yajima, T.; Hikita, Y.; Hwang, H.Y.

2012-05-16T23:59:59.000Z

260

Effects of hadron irradiation on scintillating fibers  

SciTech Connect (OSTI)

Trackers based on scintillating-fiber technology are being considered by the Solenoidal Detector Collaboration at SSC and the D[phi] collaboration at Fermilab. An important issue is the effect of the radiation existing in the detector cores on fiber properties. Most studies of radiation damage in scintillators have irradiated small bulk samples rather than fibers, and have used X-rays, [sup 60]Co gammas, or electron beams, often at accelerated rates. The authors have irradiated some 600 fibers in the Fermilab Tevatron C[phi] area, thereby obtaining a hadronic irradiation at realistic rates. Four-meter-long samples of ten Bicron polystyrene-based fiber types, maintained in air, dry nitrogen, argon, and vacuum atmospheres within stainless-steel tubes, were irradiated for seven weeks at various distances from the accelerator beam pipes. Maximum doses, measured by thermoluminescence detectors, were about 80 Krad. Fiber properties, particularly light yield and attenuation length, have been measured over a one-year period. A description of the work together with the results is presented. At the doses achieved, corresponding to a few years of actual fiber-tracking detector operation, little degradation is observed. In addition, recovery after several days' exposure to air has been noted. Properties of unirradiated samples kept in darkness show no changes after one year.

Atac, M. (Univ. of California, Los Angeles, CA (United States) Fermi National Accelerator Lab., Batavia, IL (United States)); Buchanan, C.; Chrisman, D.; Cline, D.; Kolonko, J.; Kubic, J.; Park, J. (Univ. of California, Los Angeles, CA (United States)); Baumbaugh, A.; Binkley, M.; Bross, A.D.; Finley, D.; Elias, J.; Foster, G.W.; Kephart, R.; Kephart, R.; Kim, C.; Park, H.; Pla-Dalmau, A.; Rivetta, C.; Tkaczyk, S.; Wagner, R. (Fermi National Accelerator Lab., Batavia, IL (United States)); Chung, M.; Goldberg, H.; Jeskik, R.; Margulies, S.; Mendez, H.; Solomon, J.; Vaca, F. (Univ. of Illinois, Chicago, IL (United States)); Kelley, C. (Massachusetts College of Pharmacy and Allied Health Sciences, Boston, MA (United States)); Baumbaugh, B.; Bishop, J.; Biswas, N.; Cason, N.; Jacques, J.; Kehoe, R.; Kelly, M.; Kenney, V.; LoSecco, J.; Ruchti, R.; Shephard, W.; Warchol, J.; Wayne, M.; Marchant, J.; Mountain, R.J. (Univ. of Notre Dame, IN (United States)); Davis, D.; Vandergriff, D. (O

1993-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

SIPS: Solar Irradiance Prediction System Stefan Achleitner  

E-Print Network [OSTI]

-scaling capacities of renewable energy sources such as wind and solar. However, variability and uncertainty in powerSIPS: Solar Irradiance Prediction System Stefan Achleitner Computer Science and Engineering Liu and Alberto E. Cerpa Electrical Engineering and Computer Science University of California, Merced

Cerpa, Alberto E.

262

The Sun and Climate Solar Irradiance  

E-Print Network [OSTI]

The Sun and Climate #12;Solar Irradiance The Solar Constant f = 1.4 x 106 erg/cm2/s. Over is higher when the Sun is more magnetically active. ·The Sun was magnetically active, and the climate the Sun Drive Climate? #12;The Temperature's Rising #12;Sunspots and CO2 What is Cause and What is Effect

Walter, Frederick M.

263

Total Solar Irradiance Satellite Composites and their  

E-Print Network [OSTI]

Chapter 12 Total Solar Irradiance Satellite Composites and their Phenomenological Effect on Climate. Phenomenological solar signature on climate 310 9. Conclusion 312 1. INTRODUCTION A contiguoustotal solar from each other, in particular about whether the TSI minimum during solar Cycles 22e23 (1995

Scafetta, Nicola

264

PPPL data may play role in first NASA space probe dedicated to...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

data may play role in first NASA space probe dedicated to magnetic reconnection By Raphael Rosen March 30, 2015 Tweet Widget Google Plus One Share on Facebook The Atlas V MMS...

265

A Search for Additional Planets in the Nasa Epoxi Observations of the Exoplanet System Gj 436  

E-Print Network [OSTI]

We present time series photometry of the M dwarf transiting exoplanet system GJ 436 obtained with the Extrasolar Planet Observation and Characterization (EPOCh) component of the NASA EPOXI mission. We conduct a search of ...

Seager, Sara

266

Rockets 2 Race Cars Teacher Program at the Kentucky Speedway (NASA)  

Broader source: Energy.gov [DOE]

Register here. Go Green Edition / The Heat is ON! Get your students revved up about science, technology, engineering and mathematics with NASA's Rockets 2 Race Cars STEM Education program....

267

JCESR and NASA team up to conduct research for next generation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

JCESR and NASA team up to conduct research for next generation batteries to be used in space adipex for sale News Release buy xanax online no prescription Media Contacts buy...

268

AC 2010-343: NASA SENIOR DESIGN: MISSION ASSURANCE MANAGEMENT ENVIRONMENT  

E-Print Network [OSTI]

this challenge, we propose to improve spacecraft building and operating processes with integrated software, design, implementation, system integration, validation and test. Identification of System RequirementsAC 2010-343: NASA SENIOR DESIGN: MISSION ASSURANCE MANAGEMENT ENVIRONMENT Jiang Guo, California

Conrad, James M.

269

Irradiation Embritlement in Alloy HT-9  

SciTech Connect (OSTI)

HT-9 steel is a candidate structural and cladding material for high temperature lead-bismuth cooled fast reactors. In typical advanced fast reactor designs fuel elements will be irradiated for an extended period of time, reaching up to 5-7 years. Significant displacement damage accumulation in the steel is expected (> 200 dpa) when exposed to dpa-rates of 20-30 dpa{sub Fe}/y and high fast flux (E > 0.1 MeV) {approx}4 x 10{sup 15} n/cm{sup 2}s. Core temperatures could reach 400-560 C, with coolant temperatures at the inlet as low as 250 C, depending on the reactor design. Mechanical behavior in the presence of an intense fast flux and high dose is a concern. In particular, low temperature operation could be limited by irradiation embrittlement. Creep and corrosion effects in liquid metal coolants could set a limit to the upper operating temperature. In this report, we focus on the low temperature operating window limit and describe HT-9 embrittlement experimental findings reported in the literature that could provide supporting information to facilitate the consideration of a Code Case on irradiation effects for this class of steels in fast reactor environments. HT-9 has an extensive database available on irradiation performance, which makes it the best choice as a possible near-term candidate for clad, and ducts in future fast reactors. Still, as it is shown in this report, embrittlement data for very low irradiation temperatures (< 200 C) and very high radiation exposure (> 150 dpa) is scarce. Experimental findings indicate a saturation of DBTT shifts as a function of dose, which could allow for long lifetime cladding operation. However, a strong increase in DBTT shift with decreasing irradiation temperature could compromise operation at low service temperatures. Development of a deep understanding of the physics involved in the radiation damage mechanisms, together with multiscale computer simulation models of irradiation embrittlement will provide the basis to derive trendlines and quantitative engineering predictions.

Serrano De Caro, Magdalena [Los Alamos National Laboratory

2012-08-27T23:59:59.000Z

270

Response of neutron-irradiated RPV steels to thermal annealing  

SciTech Connect (OSTI)

One of the options to mitigate the effects of irradiation on reactor pressure vessels (RPVs) is to thermally anneal them to restore the fracture toughness properties that have been degraded by neutron irradiation. This paper summarizes experimental results of work performed at the Oak Ridge National Laboratory (ORNL) to study the annealing response of several irradiated RPV steels.

Iskander, S.K.; Sokolov, M.A.; Nanstad, R.K.

1997-03-01T23:59:59.000Z

271

Total solar irradiance during the Holocene F. Steinhilber,1  

E-Print Network [OSTI]

Total solar irradiance during the Holocene F. Steinhilber,1 J. Beer,1 and C. Fro¨hlich2 Received 20 solar irradiance covering 9300 years is presented, which covers almost the entire Holocene. This reconstruction is based on a recently observationally derived relationship between total solar irradiance

Wehrli, Bernhard

272

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network [OSTI]

monthly sessions with discussion on various topics. The 2006 Fiscal Year's (FY) budget was a frequent in 2015. The seven science instruments on the piano­sized probe will shed light on the bodies' surface assist March 2007 - June 2015 - Interplanetary cruise July 2015 - Pluto-Charon encounter 2016

Christian, Eric

273

NASA Advisory Council October 6-7, 2010  

E-Print Network [OSTI]

, and stability of surface materials (for human exploration) aids PD planning Version 13 #12; Time is a 4th planning; to acquire the required capabilities, to include development of identification and mitigation) Planetary radar support observations to increase NEO orbit precision, reduce position error ellipse

Waliser, Duane E.

274

Sensitivity of ultrasonic nonlinearity to irradiated, annealed, and re-irradiated microstructure changes in RPV steels  

SciTech Connect (OSTI)

The planned life extension of nuclear reactors throughout the US and abroad will cause reactor vessel and internals materials to be exposed to more neutron irradiation than was originally intended. A nondestructive evaluation (NDE) method to monitor radiation damage would enable safe and cost-effective continued operation of nuclear reactors. Radiation damage in reactor pressure vessel (RPV) steels causes microstructural changes that leave the material in an embrittled state. Nonlinear ultrasound is an NDE technique quantified by the measurable acoustic nonlinearity parameter, which is sensitive to microstructural changes in metallic materials such as dislocations, precipitates and their combinations. Recent research has demonstrated the sensitivity of the acoustic nonlinearity parameter to increasing neutron fluence in representative RPV steels. The current work considers nonlinear ultrasonic experiments conducted on similar RPV steel samples that had a combination of irradiation, annealing, re-irradiation, and/or re-annealing to a total neutron fluence of 0.5 5 1019 n/cm2 (E > 1 MeV) at an irradiation temperature of 290 C. The acoustic nonlinearity parameter generally increased with increasing neutron fluence, and consistently decreased from the irradiated to the annealed state over different levels of neutron fluence. Results of the measured acoustic nonlinearity parameter are compared with those from previous measurements on other RPV steel samples. This comprehensive set of results illustrates the dependence of the measured acoustic nonlinearity parameter on neutron fluence, material composition, irradiation temperature and annealing.

Matlack, Katie [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta; Kim, J-Y. [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta; Wall, J.J. [Electric Power Research Institute (EPRI)] [Electric Power Research Institute (EPRI); Jacobs, L.J. [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta; Sokolov, Mikhail A [ORNL] [ORNL

2014-01-01T23:59:59.000Z

275

Tritium trapping in silicon carbide in contact with solid breeder under high flux isotope reactor irradiation  

SciTech Connect (OSTI)

The trapping of tritium in silicon carbide (SiC) injected from ceramic breeding materials was examined via tritium measurements using imaging plate (IP) techniques. Monolithic SiC in contact with ternary lithium oxide (lithium titanate and lithium aluminate) as a ceramic breeder was irradiated in the High Flux Isotope Reactor (HFIR) in Oak Ridge, Tennessee, USA. The distribution of photo-stimulated luminescence (PSL) of tritium in SiC was successfully obtained, which separated the contribution of 14C -rays to the PSL. The tritium incident from ceramic breeders was retained in the vicinity of the SiC surface even after irradiation at 1073 K over the duration of ~3000 h, while trapping of tritium was not observed in the bulk region. The PSL intensity near the SiC surface in contact with lithium titanate was higher than that obtained with lithium aluminate. The amount of the incident tritium and/or the formation of a Li2SiO3 phase on SiC due to the reaction with lithium aluminate under irradiation likely were responsible for this observation.

H. Katsui; Y. Katoh; A. Hasegawa; M. Shimada; Y. Hatano; T. Hinoki; S. Nogami; T. Tanaka; S. Nagata; T. Shikama

2013-11-01T23:59:59.000Z

276

Cella Energy Limited, a spinout company from STFC, is to set up a new facility at NASA's iconic Kennedy Space Center (NASA KSC) after a new round of  

E-Print Network [OSTI]

equity raised by international institutions and will see the number of jobs at Cella Energy more than Stephen Voller, CEO of Cella Energy Limited. "It will also see the number of jobs at Cella increase fromCella Energy Limited, a spinout company from STFC, is to set up a new facility at NASA's iconic

277

Effects of stress on microstructural evolution during irradiation  

SciTech Connect (OSTI)

Many theories have been postulated to describe irradiation creep but few have been supported with microstructural evidence. The purpose of this paper is to review microstructural studies of the effects of stress during irradiation in order to assess the validity of the available irradiation creep theories. Microstructural studies based on high voltage electron, ion, proton and neutron irradiation will be described, with major emphasis placed on interpreting behavior demonstrated in austenitic steels. Special attention will be given to work on fast neutron irradiated Nimonic PE16, a precipitation strengthened superalloy.

Gelles, D.S. [Pacific Northwest Lab., Richland, VA (United States)

1992-12-31T23:59:59.000Z

278

Determination of the melting threshold of TiO{sub 2} thin films processed by excimer laser irradiation  

SciTech Connect (OSTI)

Processing surfaces by laser needs an understanding of the mechanisms generated by irradiation. In this work, to gain understanding of the mechanisms occurring during irradiation of TiO{sub 2} thin films by means of KrF excimer laser, we have performed infrared time resolved reflectivity measurements. This experimental investigation revealed modifications of the heating/cooling cycle as a function of the fluence (F). These modifications start appearing for a fluence value of about {approx}0.25 J/cm{sup 2} which is associated with the melting threshold of the film. Additionally, we have solved numerically the heat equation of the system with specific boundary conditions. From these calculations, we have established the thermal history of the film during the 25 ns irradiation pulse. The data reveal that a part of the medium liquefies around a fluence of 0.23 J/cm{sup 2} in good agreement with the experimental data.

Van Overschelde, O. [Chimie des Interactions Plasma-Surface, Universite de Mons, 23, Place du Parc, 7000 Mons (Belgium); Delsate, T. [Service de Physique Theorique et Mathematique, Universite de Mons, 6 Avenue du champ de Mars, 7000 Mons (Belgium); Snyders, R. [Chimie des Interactions Plasma-Surface, Universite de Mons, 23, Place du Parc, 7000 Mons (Belgium); Materia Nova Research Center, 1 Avenue Copernic, 7000 Mons (Belgium)

2012-06-15T23:59:59.000Z

279

Engineering of silicon/HfO{sub 2} interface by variable energy proton irradiation  

SciTech Connect (OSTI)

Surfaces and interfaces between materials are of paramount importance for various phenomena, such as painting a house, catalyst driven chemical reactions, intricate life processes, corrosion of materials, and fabrication of various semiconductor devices. Interface of silicon or other such substrates with any of the oxides has profound effect on the performance of metal oxide field effect transistors and other similar devices. Since a surface is an abrupt termination of a periodic crystal, surface atoms will have some unsaturated valence electrons and these unsaturated bonds at the semiconductor surface make it chemically highly reactive. Other than annealing, there is not much that can be done to manage these unsaturated bonds. This study was initiated to explore the possibility of repairing these unsaturated dangling bonds that are formed at the silicon and oxide interface during the deposition of oxide layer above silicon, by the use of proton irradiation. In order to improve the interface characteristics, we present a method to modify the interface of silicon and hafnium dioxide after its fabrication, through proton irradiation. Results of the study are promising and probably this method might be used along with other methods such as annealing to modify the interface, after its fabrication.

Maurya, Savita, E-mail: mauryasavita5@gmail.com; Maringanti, Radhakrishna [Division of Electronics and Microelectronics, Indian Institute of Information Technology, Allahabad, Uttar Pradesh 211012 (India); Tribedi, L. C. [DNAP, Tata Institute of Fundamental Research, Mumbai, Maharashtra 400005 (India)

2014-08-18T23:59:59.000Z

280

Surface Energy,Surface Energy, Surface Tension & Shape of CrystalsSurface Tension & Shape of Crystals  

E-Print Network [OSTI]

Surface Energy,Surface Energy, Surface Tension & Shape of CrystalsSurface Tension & Shape of shapes of crystals are important: (i) growth shape and (ii) equilibrium shape Surface/interface energy surfaces. The joining of two phases creates an interface. (Two orientations of the same crystalline phase

Subramaniam, Anandh

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Evolution of nanoripples on silicon by gas cluster-ion irradiation  

SciTech Connect (OSTI)

Si wafers of (100), (110) and (111) orientations were bombarded by gas cluster ion beam (GCIB) of 3000 Ar-atoms/cluster on average at a series of angles. Similar surface morphology ripples developed in different nanoscales. A simple scaling functional satisfactorily describe the roughness and wavelength of the ripple patterns as a function of dosage and angle of incidence. The ripples are formed orthogonal to the incident cluster-ions at large off-normal angles. An ellipsoidal pattern was created by two consecutive irradiations incident in mutually orthogonal directions with unequal exposure times between each irradiation, from 7:1 to 10:1, beyond which the original ripple imprints would be over-written. This work was inspired by use of the ripples to seed growth of controlled nanostructures without patterning by lithography or predeposition of catalysts.

Lozano, Omar; Chen, Q. Y.; Wadekar, P. V.; Chinta, P. V. [Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 88204 (United States); Department of Physics and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan (China); Tilakaratne, B. P.; Wang, X. M.; Wijesundera, D.; Chu, W. K. [Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 88204 (United States); Seo, H. W. [Department of Physics and Astronomy, University of Arkansas, Little Rock, AR 72204 (United States); Tu, L. W. [Department of Physics and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan (China); Ho, N. J. [Department of Materials and Optoelectronic Sciences and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan (China)

2013-06-15T23:59:59.000Z

282

Evaluation of FSV-1 cask for the transport of LWR irradiated fuel assemblies  

SciTech Connect (OSTI)

The Model FSV-1 spent fuel shipping cask was designed by General Atomic Company (GA) to service the Fort St. Vrain (FSV) nuclear generating station, a High Temperature Gas Reactor (HTGR) owned and operated by Public Service Company of Colorado (PSC). This report presents an evaluation of the suitability of the FSV-1 cask for the transport of irradiated Light Water Reactor (LWR) fuel assemblies from both Pressurized Water Reactors (PWR) and Boiling Water Reactors (BWR). The FSV-1 cask evaluation parameters covered a wide spectrum of LWR fuel assemblies, based on burnup in Megawatt Days/Metric Ton of Heavy Metal (MWD/MTHM) and years of decay since irradiation. The criteria for suitability included allowable radiation dose rates, cask surface and interior temperatures and the Gross Vehicle Weight (GVW) of the complete shipping system.

Not Available

1980-05-01T23:59:59.000Z

283

Materials Modification Under Ion Irradiation: JANNUS Project  

SciTech Connect (OSTI)

JANNUS (Joint Accelerators for Nano-Science and Nuclear Simulation) is a project designed to study the modification of materials using multiple ion beams and in-situ TEM observation. It will be a unique facility in Europe for the study of irradiation effects, the simulation of material damage due to irradiation and in particular of combined effects. The project is also intended to bring together experimental and modelling teams for a mutual fertilisation of their activities. It will also contribute to the teaching of particle-matter interactions and their applications. JANNUS will be composed of three accelerators with a common experimental chamber and of two accelerators coupled to a 200 kV TEM.

Serruys, Y.; Trocellier, P. [CEA-Saclay, DEN/DMN/SRMP, 91191 Gif-sur-Yvette Cedex (France); Ruault, M.-O.; Henry, S.; Kaietasov, O. [CSNSM, Bat. 104, Orsay Campus (France); Trouslard, Ph. [INSTN, CEA-Saclay, 91191 Gif-sur-Yvette Cedex (France)

2004-12-01T23:59:59.000Z

284

Neutron irradiation of beryllium: Recent Russian results  

SciTech Connect (OSTI)

Results on postirradiation tensile and compression testing, swelling and bubble growth during annealing for various grades of beryllium are presented. It is shown that swelling at temperatures above 550{degrees}C is sensitive to material condition and response is correlated with oxygen content. Swelling on the order of 15% can be expected at 700{degrees}C for doses on the order of 10{sup 22} n/cm{sup 2}. Bubble growth response depends on irradiation fluence.

Gelles, D.S. [Pacific Northwest Lab., Richland, VA (United States)

1992-12-31T23:59:59.000Z

285

ARM - Measurement - Shortwave broadband total net irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearch Relatedcontent ARMnumberDoppler ARMdiffusedirectnet irradiance

286

ARM - Measurement - Shortwave narrowband direct downwelling irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearch Relatedcontent ARMnumberDopplerdownwelling irradiance ARM Data

287

ARM - Measurement - Shortwave narrowband direct normal irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUC : XDCResearch Relatedcontent ARMnumberDopplerdownwelling irradiance ARM

288

Molecular Hydrogen Emission from Protoplanetary Disks II. Effects of X-ray Irradiation and Dust Evolution  

E-Print Network [OSTI]

Detailed models for the density and temperature profiles of gas and dust in protoplanetary disks are constructed by taking into account X-ray and ultraviolet (UV) irradiation from a central T Tauri star, as well as dust size growth and settling toward the disk midplane. The spatial and size distributions of dust grains in the disks are numerically computed by solving the coagulation equation for settling dust particles. The level populations and line emission of molecular hydrogen are calculated using the derived physical structure of the disks. X-ray irradiation is the dominant heating source of the gas in the inner disk region and in the surface layer, while the far UV heating dominates otherwise. If the central star has strong X-ray and weak UV radiation, the H2 level populations are controlled by X-ray pumping, and the X-ray induced transition lines could be observable. If the UV irradiation is strong, the level populations are controlled by thermal collisions or UV pumping, depending on the properties of the dust grains in the disks. As the dust particles evolve in the disks, the gas temperature at the disk surface drops because the grain photoelectric heating becomes less efficient, while the UV radiation fields become stronger due to the decrease of grain opacity. This makes the H2 level populations change from local thermodynamic equilibrium (LTE) to non-LTE distributions, which results in changes to the line ratios of H2 emission. Our results suggest that dust evolution in protoplanetary disks could be observable through the H2 line ratios. The emission lines are strong from disks irradiated by strong UV and X-rays and possessing small dust grains; such disks will be good targets in which to observe H2 emission.

H. Nomura; Y. Aikawa; M. Tsujimoto; Y. Nakagawa; T. J. Millar

2007-02-01T23:59:59.000Z

289

Magnetic phase formation in irradiated austenitic alloys  

SciTech Connect (OSTI)

Austenitic alloys are often observed to develop magnetic properties during irradiation, possibly associated with radiation-induced acceleration of the ferrite phase. Some of the parametric sensitivities of this phenomenon have been addressed using a series of alloys irradiated in the BOR-60 reactor at 593K. The rate of development of magnetic phase appears to be sensitive to alloy composition. To the first order, the largest sensitivities to accelerate ferrite formation, as explored in this experiment, are associated with silicon, carbon and manganese and chromium. Si, C, and Mn are thought to influence diffusion rates of point defects while Cr plays a prominent role in defining the chromium equivalent and therefore the amount of ferrite at equilibrium. Pre-irradiation cold working was found to accelerate ferrite formation, but it can play many roles including an effect on diffusion, but on the basis of these results the dominant role or roles of cold-work cannot be identified. Based on the data available, ferrite formation is most probably associated with diffusion.

Gussev, Maxim N [ORNL] [ORNL; Busby, Jeremy T [ORNL] [ORNL; Tan, Lizhen [ORNL] [ORNL; Garner, Francis A. [Radiation Effects Consulting, Richland, WA] [Radiation Effects Consulting, Richland, WA

2014-01-01T23:59:59.000Z

290

Upgrade to the Birmingham Irradiation Facility  

E-Print Network [OSTI]

The Birmingham Irradiation Facility was developed in 2013 at the University of Birmingham using the Medical Physics MC40 cyclotron. It can achieve High Luminosity LHC (HL-LHC) fluences of 10^15 (1 MeV neutron equivalent (neq)) cm^-2 in 80 s with proton beam currents of 1 ?A and so can evaluate effectively the performance and durability of detector technologies and new components to be used for the HL-LHC. Irradiations of silicon sensors and passive materials can be carried out in a temperature controlled cold box which moves continuously through the homogenous beamspot. This movement is provided by a pre-configured XY-axis Cartesian robot scanning system. In 2014 the cooling system and cold box were upgraded from a recirculating glycol chiller system to a liquid nitrogen evaporative system. The new cooling system achieves a stable temperature of 50 1C in 30 min and aims to maintain sub-0 1C temperatures on the sensors during irradiations. This paper reviews the design, development, commissioning and perform...

Dervan, P; Hodgson, P; Marin- Reyes; Parker, K; Wilson, J; Baca, M

2015-01-01T23:59:59.000Z

291

Irradiation response and stability of nanoporous materials  

SciTech Connect (OSTI)

Nanoporous materials consist of a regular organic or inorganic framework supporting a regular, porous structure. Pores are by definition roughly in the nanometre range, that is between 0.2 nm and 100 nm. Nanoporous materials can be subdivided into 3 categories (IUPAC): (1) Microporous materials - 0.2-2 nm; (2) Mesoporous materials - 2-50 nm; and (3) Macroporous materials - 50-1000 nm. np-Au foams were successfully synthesized by de-alloying process. np-Au foams remain porous structure after Ne ion irradiation to 1 dpa. Stacking Fault Tetrahedra (SFTs) were observed in RT irradiated np-Au foams under the highest and intermediate fluxes, but not under the lowest flux. SFTs were not observed in LNT irradiated np-Au foams under all fluxes. The vacancy diffusivity in Au at RT is high enough so that the vacancies have enough time to agglomerate and then collapse to form SFTs. The high ion flux creates more damage per unit time; vacancies don't have enough time to diffuse or recombine. As a result, SFTs were formed at high ion fluxes.

Fu, Engang [Los Alamos National Laboratory; Wang, Yongqiang [Los Alamos National Laboratory; Serrano De Caro, Magdalena [Los Alamos National Laboratory; Caro, Jose A. [Los Alamos National Laboratory; Zepeda-Ruiz, L [Lawrence Livermore national Laboratory; Bringa, E. [CONICET, Universidad de Cuyo, Argentina; Nastasi, Mike [University of Nebraska, Lincoln, NE; Baldwin, Jon K. [Los Alamos National Laboratory

2012-08-28T23:59:59.000Z

292

Evaluation of Neutron Irradiated Silicon Carbide and Silicon Carbide Composites  

SciTech Connect (OSTI)

The effects of fast neutron irradiation on SiC and SiC composites have been studied. The materials used were chemical vapor deposition (CVD) SiC and SiC/SiC composites reinforced with either Hi-Nicalon{trademark} Type-S, Hi-Nicalon{trademark} or Sylramic{trademark} fibers fabricated by chemical vapor infiltration. Statistically significant numbers of flexural samples were irradiated up to 4.6 x 10{sup 25} n/m{sup 2} (E>0.1 MeV) at 300, 500 and 800 C in the High Flux Isotope Reactor at Oak Ridge National Laboratory. Dimensions and weights of the flexural bars were measured before and after the neutron irradiation. Mechanical properties were evaluated by four point flexural testing. Volume increase was seen for all bend bars following neutron irradiation. Magnitude of swelling depended on irradiation temperature and material, while it was nearly independent of irradiation fluence over the fluence range studied. Flexural strength of CVD SiC increased following irradiation depending on irradiation temperature. Over the temperature range studied, no significant degradation in mechanical properties was seen for composites fabricated with Hi-Nicalon{trademark} Type-S, while composites reinforced with Hi-Nicalon{trademark} or Sylramic fibers showed significant degradation. The effects of irradiation on the Weibull failure statistics are also presented suggesting a reduction in the Weibull modulus upon irradiation. The cause of this potential reduction is not known.

Newsome G, Snead L, Hinoki T, Katoh Y, Peters D

2007-03-26T23:59:59.000Z

293

Exhaust-gas measurements from NASAs HYMETS arc jet.  

SciTech Connect (OSTI)

Arc-jet wind tunnels produce conditions simulating high-altitude hypersonic flight such as occurs upon entry of space craft into planetary atmospheres. They have traditionally been used to study flight in Earth's atmosphere, which consists mostly of nitrogen and oxygen. NASA is presently using arc jets to study entry into Mars' atmosphere, which consists of carbon dioxide and nitrogen. In both cases, a wide variety of chemical reactions take place among the gas constituents and with test articles placed in the flow. In support of those studies, we made measurements using a residual gas analyzer (RGA) that sampled the exhaust stream of a NASA arc jet. The experiments were conducted at the HYMETS arc jet (Hypersonic Materials Environmental Test System) located at the NASA Langley Research Center, Hampton, VA. This report describes our RGA measurements, which are intended to be used for model validation in combination with similar measurements on other systems.

Miller, Paul Albert

2010-11-01T23:59:59.000Z

294

Surface nanostructuring by ion-induced localized plasma expansion in zinc oxide  

SciTech Connect (OSTI)

Creation of hillock-like nanostructures on the surface of zinc oxide single crystals by irradiation with slow highly charged ions is reported. At constant kinetic energy, the nanostructures were only observed after irradiation with ions of potential energies above a threshold between 19.1?keV and 23.3?keV. The size of the nanostructures increases as a function of potential energy. A plasma expansion approach is used to explain the nanostructures creation. The calculations showed that the surface nanostructures became taller with the increase of ionic temperature. The influence of charged cluster formation and the relevance of their polarity are discussed.

El-Said, A. S., E-mail: elsaid@kfupm.edu.sa, E-mail: a.s.el-said@hzdr.de [Physics Department, King Fahd University of Petroleum and Minerals, Dhahran 31261 (Saudi Arabia); Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), 01328 Dresden (Germany); Physics Department, Faculty of Science, Mansoura University, 35516 Mansoura (Egypt); Moslem, W. M. [Department of Physics, Faculty of Science, Port Said University, Port Said 42521 (Egypt); Centre for Theoretical Physics, British University in Egypt (BUE), El-Shorouk City, Cairo (Egypt); Djebli, M. [Theoretical Physics Laboratory, Faculty of Physics USTHB, B.P. 32 Bab Ezzour, 16079 Algiers (Algeria)

2014-06-09T23:59:59.000Z

295

NASA Marshall Space Flight Center (MSFC) -Automated Lunar and Meteor Observatory (ALaMO) -Candidate lunar impact observation database NASA Meteoroid Environment Office (MEO)  

E-Print Network [OSTI]

.4 Newtonian T 119 StellaCam EX Sony GV-D800 MSFC 4487 Suggs and Swift http://science.nasa.gov/headlines/y2005.4 Newtonian T 119 StellaCam EX Sony GV-D800 MSFC ALAMO Moser and McNamara http 19.1 25.4 Newtonian T 119 StellaCam EX Sony GV-D800 MSFC ALAMO Swift, Hollon, & Altstatt 105 21-Jun

Waliser, Duane E.

296

Reliability and Consistency of Surface Contamination Measurements  

SciTech Connect (OSTI)

Surface contamination evaluation is a tough problem since it is difficult to isolate the radiations emitted by the surface, especially in a highly irradiating atmosphere. In that case the only possibility is to evaluate smearable (removeable) contamination since ex-situ countings are possible. Unfortunately, according to our experience at CEA, these values are not consistent and thus non relevant. In this study, we show, using in-situ Fourier Transform Infra Red spectrometry on contaminated metal samples, that fixed contamination seems to be chemisorbed and removeable contamination seems to be physisorbed. The distribution between fixed and removeable contamination appears to be variable. Chemical equilibria and reversible ion exchange mechanisms are involved and are closely linked to environmental conditions such as humidity and temperature. Measurements of smearable contamination only give an indication of the state of these equilibria between fixed and removeable contamination at the time and in the environmental conditions the measurements were made.

Rouppert, F.; Rivoallan, A.; Largeron, C.

2002-02-26T23:59:59.000Z

297

Josephson Junctions and Devices fabricated by Focused Electron Beam Irradiation  

E-Print Network [OSTI]

Josephson Junctions and Devices fabricated by Focused Electron Beam Irradiation Wilfred Edwin Booij Gonville and Caius College Cambridge A dissertation submitted for the degree of Doctor of Philosophy at the University of Cambridge December 1997... Summary Josephson Junctions and Devices fabricated by Focused Electron Beam Irradiation The irradiation of high Tc superconducting thin films with a focused electron beam, such as that obtained in a scanning transmission electron microscope (STEM), can...

Booij, Wilfred Edwin

298

Interaction between water cluster ions and mica surface  

SciTech Connect (OSTI)

Water cluster ion beams were irradiated on mica surfaces to investigate the interaction between molecular cluster ions and a mica surface. The contact angle of the mica surface increased with increasing dose of the water cluster ion beam, but the increase in the contact angle was smaller than that induced by an ethanol cluster ion beam. The surface roughness also increased with increasing dose of the water cluster ion beam, whereas the intensity of K 2p x-ray photoelectron spectroscopy peaks decreased with increasing dose of the water cluster ion beam. The decrease in the number of potassium atoms together with the increase in the surface roughness may be the causes of the increase in the contact angle.

Ryuto, Hiromichi, E-mail: ryuto@kuee.kyoto-u.ac.jp; Ohmura, Yuki; Nakagawa, Minoru; Takeuchi, Mitsuaki; Takaoka, Gikan H. [Photonics and Electronics Science and Engineering Center, Kyoto University, Nishikyo, Kyoto 615-8510 (Japan)

2014-03-15T23:59:59.000Z

299

Surface Radiation from GOES: A Physical Approach; Preprint  

SciTech Connect (OSTI)

Models to compute Global Horizontal Irradiance (GHI) and Direct Normal Irradiance (DNI) have been in development over the last 3 decades. These models can be classified as empirical or physical, based on the approach. Empirical models relate ground based observations with satellite measurements and use these relations to compute surface radiation. Physical models consider the radiation received from the earth at the satellite and create retrievals to estimate surface radiation. While empirical methods have been traditionally used for computing surface radiation for the solar energy industry the advent of faster computing has made operational physical models viable. The Global Solar Insolation Project (GSIP) is an operational physical model from NOAA that computes GHI using the visible and infrared channel measurements from the GOES satellites. GSIP uses a two-stage scheme that first retrieves cloud properties and uses those properties in a radiative transfer model to calculate surface radiation. NREL, University of Wisconsin and NOAA have recently collaborated to adapt GSIP to create a 4 km GHI and DNI product every 30 minutes. This paper presents an outline of the methodology and a comprehensive validation using high quality ground based solar data from the National Oceanic and Atmospheric Administration (NOAA) Surface Radiation (SURFRAD) (http://www.srrb.noaa.gov/surfrad/sitepage.html) and Integrated Surface Insolation Study (ISIS) http://www.srrb.noaa.gov/isis/isissites.html), the Solar Radiation Research Laboratory (SRRL) at National Renewable Energy Laboratory (NREL), and Sun Spot One (SS1) stations.

Habte, A.; Sengupta, M.; Wilcox, S.

2012-09-01T23:59:59.000Z

300

Photogenerated carrier-induced reaction on semiconductor surfaces  

SciTech Connect (OSTI)

We have begun studying the effect of illumination on the chemical interaction of molecular chlorine with a well-defined GaAs(110) surface under ultra-high vacuum (UHV) conditions. We have found that chlorine adsorbs dissociatively at temperatures as low as 85 K. Illumination of molecular chlorine-covered surface at 85 K with 193-nm radiation led to desorption of Cl-atoms accompanied by Cl{sub 2} molecules, as well as formation of AsCl{sub 2}/AsCl{sub 3}, which desorbed at 180 K. Illumination with 351-nm excimer-laser radiation caused exclusively Cl-atoms ejection, at a lower rate. It also resulted in smaller amounts of arsenic chloride formed on the surface. No new species were observed when the surface was irradiated with a 535-nm laser. We suggest that the surface reaction is initiated by dissociation of adsorbed molecular chlorine, which we believe, is mediated by photoemission of electrons from the substrate upon 193-nm irradiation. Finally, we have nearly completed the construction of a second UHV system for the study of laser-induced dissociation of metal alkyls on GaAs surfaces. This system will incorporate total-internal-reflection Fourier-transform IR spectroscopy to follow reaction intermediates, a time of flight mass spectrometer, low electron energy diffraction and Auger Electron spectroscopy.

Osgood, R.M. Jr.

1990-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Direct-Normal Solar Irradiance -A Closure Experiment, Halthore et al. 1 Comparison of Model Estimated and Measured Direct-Normal  

E-Print Network [OSTI]

). This is the energy in the solar spectrum falling per unit time on a unit area of a surface oriented normal to the Sun Direct-normal solar irradiance (DNSI), the total energy in the solar spectrum incident in unit time extinction of solar energy without regard to the details of the extinction - whether absorption or scattering

Schwartz, Stephen E.

302

A Simplified Shuttle Irradiation Facility for ATR  

SciTech Connect (OSTI)

During the past fifteen years there has been a steady increase in the demand for radioisotopes in nuclear medicine and a corresponding decline in the number of reactors within the U.S. capable of producing them. The Advanced Test Reactor (ATR) is the largest operating test reactor in the U.S., but its isotope production capabilities have been limited by the lack of an installed isotope shuttle irradiation system. A concept for a simple low cost shuttle irradiation facility for ATR has been developed. Costs were reduced (in comparison to previous ATR designs) by using a shielded trough of water installed in an occupiable cubicle as a shielding and contamination control barrier for the send and receive station. This shielding concept also allows all control valves to be operated by hand and thus the need for an automatic control system was eliminated. It was determined that 4 5 ft of water would be adequate to shield the isotopes of interest while shuttles are transferred to a small carrier. An additional feature of the current design is a non-isolatable by-pass line, which provides a minimum coolant flow to the test region regardless of which control valves are opened or closed. This by-pass line allows the shuttle facility to be operated without bringing reactor coolant water into the cubicle except for send and receive operations. The irradiation position selected for this concept is a 1.5 inch B hole (B-11). This position provides neutron fluxes of approximately: 1.6 x 1014 (<0.5 eV) and 4.0 x 1013 (>0.8 MeV) n/cm2*sec.

Palmer, Alma Joseph; Laflin, S. T.

1999-09-01T23:59:59.000Z

303

Emulation of reactor irradiation damage using ion beams  

SciTech Connect (OSTI)

The continued operation of existing light water nuclear reactors and the development of advanced nuclear reactor depend heavily on understanding how damage by radiation to levels degrades materials that serve as the structural components in reactor cores. The first high dose ion irradiation experiments on a ferritic-martensitic steel showing that ion irradiation closely emulates the full radiation damage microstructure created in-reactor are described. Ferritic-martensitic alloy HT9 (heat 84425) in the form of a hexagonal fuel bundle duct (ACO-3) accumulated 155 dpa at an average temperature of 443C in the Fast Flux Test Facility (FFTF). Using invariance theory as a guide, irradiation of the same heat was conducted using self-ions (Fe++) at 5 MeV at a temperature of 460C and to a dose of 188 displacements per atom. The void swelling was nearly identical between the two irradiations and the size and density of precipitates and loops following ion irradiation are within a factor of two of those for neutron irradiation. The level of agreement across all of the principal microstructure changes between ion and reactor irradiations establishes the capability of tailoring ion irradiations to emulate the reactor-irradiated microstructure.

G. S. Was; Z. Jiao; E. Beckett; A. M. Monterrosa; O. Anderoglu; B. H. Sencer; M. Hackett

2014-10-01T23:59:59.000Z

304

Microsoft Word - Analysis of Deformation Mode Changes in Irradiated...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

steels); however, in many cases they may have a negative impact on material performance (hydrogen embrittlement of bcc-phase, etc.). Irradiation leads to defects accumulation,...

305

Irradiation Effects on Human Cortical Bone Fracture Behavior  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Irradiation Effects on Human Cortical Bone Fracture Behavior Print Human bone is strong but still fallible. To better predict fracturing in bone, researchers need a mechanistic...

306

alpha particle irradiation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

307

alpha particles irradiation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

308

alpha particle irradiated: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

309

apres irradiation alpha: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Edmond 8 Incidence characteristics of alpha particles on detectors irradiated in a radon progeny atmosphere Biology and Medicine Websites Summary: Incidence characteristics of...

310

Modification of Defect Structures in Graphene by Electron Irradiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Modification of Defect Structures in Graphene by Electron Irradiation: Ab Initio Molecular Dynamics Simulations. Modification of Defect Structures in Graphene by Electron...

311

Dynamic Recovery in Silicate-Apatite Structures Under Irradiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Recovery in Silicate-Apatite Structures Under Irradiation and Implications for Long-Term Immobilization of Actinides. Dynamic Recovery in Silicate-Apatite Structures Under...

312

Laboratory investigations of irradiated acetonitrile-containing ices on an interstellar dust analog  

SciTech Connect (OSTI)

Reflection-absorption infrared spectroscopy is used to study the impact of low-energy electron irradiation of acetonitrile-containing ices, under conditions close to those in the dense star-forming regions in the interstellar medium. Both the incident electron energy and the surface coverage were varied. The experiments reveal that solid acetonitrile is desorbed from its ultrathin solid films with a cross section of the order of 10{sup -17} cm{sup 2}. Evidence is presented for a significantly larger desorption cross section for acetonitrile molecules at the water-ice interface, similar to that previously observed for the benzene-water system.

Abdulgalil, Ali G. M.; Marchione, Demian; Rosu-Finsen, Alexander; Collings, Mark P.; McCoustra, Martin R. S. [School of Engineering and Physical Sciences, Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS (United Kingdom)

2012-07-15T23:59:59.000Z

313

TIME-DISTANCE HELIOSEISMOLOGY WITH f MODES AS A METHOD FOR MEASUREMENT OF NEAR-SURFACE FLOWS  

E-Print Network [OSTI]

600­1200. In this range the f -mode kinetic energy is concentrated within 2 Mm of the solar photosphere. There are several advantages to using the f mode as a tracer of flows near the solar surface. DUVALL JR.1 and L. GIZON2 1Laboratory for Astronomy and Solar Physics, NASA/Goddard Space Flight Center

Gizon, Laurent

314

Results of irradiated cladding tests and clad plate experiments  

SciTech Connect (OSTI)

Two aspects critical to the fracture behavior of three-wire stainless steel cladding were investigated by the Heavy-Section Steel Technology (HSST) Program: (1) radiation effects on cladding strength and toughness, and (2) the response of mechanically loaded, flawed structures in the presence of cladding (clad plate experiments). Postirradiation testing results show that, in the test temperature range from /minus/125 to 288/degree/C, the yield strength increased, and ductility insignificantly increased, while there was almost no change in ultimate tensile strength. All cladding exhibited ductile-to-brittle transition behavior during Charpy impact testing. Radiation damage decreased the Charpy upper-shelf energy by 15 to 20% and resulted in up to 28/degree/C shifts of the Charpy impact transition temperature. Results of irradiated 12.5-mm-thick compact specimens (0.5TCS) show consistent decreases in the ductile fracture toughness, J/sub Ic/, and the tearing modulus. Results from clad plate tests have shown that (1) a tough surface layer composed of cladding and/or heat-affected zone has arrested running flaws under conditions where unclad plates have ruptured, and (2) the residual load-bearing capacity of clad plates with large subclad flaws significantly exceeded that of an unclad plate. 13 figs., 1 tab.

Haggag, F.M.; Iskander, S.K.

1988-01-01T23:59:59.000Z

315

Void Nucleation, Growth and Coalescence in Irradiated Metals  

SciTech Connect (OSTI)

A novel computational treatment of dense, stiff, coupled reaction rate equations is introduced to study the nucleation, growth, and possible coalescence of cavities during neutron irradiation of metals. Radiation damage is modeled by the creation of Frenkel pair defects and helium impurity atoms. A multi-dimensional cluster size distribution function allows independent evolution of the vacancy and helium content of cavities, distinguishing voids and bubbles. A model with sessile cavities and no cluster-cluster coalescence can result in a bimodal final cavity size distribution with coexistence of small, high-pressure bubbles and large, low-pressure voids. A model that includes unhindered cavity diffusion and coalescence ultimately removes the small helium bubbles from the system, leaving only large voids. The terminal void density is also reduced and the incubation period and terminal swelling rate can be greatly altered by cavity coalescence. Temperature-dependent trapping of voids/bubbles by precipitates and alterations in void surface diffusion from adsorbed impurities and internal gas pressure may give rise to intermediate swelling behavior through their effects on cavity mobility and coalescence.

Surh, M P; Sturgeon, J B; Wolfer, W G

2008-01-11T23:59:59.000Z

316

Microstructural examination of irradiated vanadium alloys  

SciTech Connect (OSTI)

Microstructural examination results are reported for a V-5Cr-5Ti unirradiated control specimens of heat BL-63 following annealing at 1050{degrees}C, and V-4Cr-4Ti heat BL-47 irradiated in three conditions from the DHCE experiment: at 425{degrees}C to 31 dpa and 0.39 appm He/dpa, at 600{degrees}C to 18 dpa and 0.54 appm He/dpa and at 600{degrees}C to 18 dpa and 4.17 appm He/dpa.

Gelles, D.S. [Pacific Northwest National Lab., Richland, WA (United States); Chung, H.M. [Argonne National Lab., IL (United States)

1997-04-01T23:59:59.000Z

317

Mitigation of irradiation embrittlement by annealing  

SciTech Connect (OSTI)

The main results of a complex investigation carried out in Russia of post irradiation annealing and reembrittlement of WWER-440 reactor pressure vessel materials are presented. The dependence of the Charpy transition temperature recovery on annealing temperature and fluence was established. Charpy specimens were reirradiated after annealing at 340, 380, 420, and 460 C. Experimental values of the Charpy transition temperature after reirradiation are compared to that predicted by three methods. At annealing temperatures equal to or above 420 C, results of the analysis indicate that, of the methods investigated, the lateral shift method gives the best result for estimating the transition temperature shift due to reirradiation.

Amayev, A.D.; Kryukov, A.M.; Levit, V.I.; Platonov, P.A.; Sokolov, M.A. [Kurchatov Inst., Moscow (Russian Federation)

1996-12-31T23:59:59.000Z

318

Irradiation-induced effects of proton irradiation on zirconium carbides with different stoichiometries  

SciTech Connect (OSTI)

Zirconium carbide (ZrC) is being considered for utilization in deep burn TRISO fuel particles for hightemperature, gas-cooled reactors. Zirconium carbide has a cubic B1 type crystal structure along with a very high melting point (3420 ?C), exceptional hardness and good thermal and electrical conductivities. Understanding the ZrC irradiation response is crucial for establishing ZrC as an alternative component in TRISO fuel. Until now, very few studies on irradiation effects on ZrC have been released and fundamental aspects of defect evolution and kinetics are not well understood although some atomistic simulations and phenomenological studies have been performed. This work was carried out to understand the damage evolution in float-zone refined ZrC with different stoichiometries. Proton irradiations at 800 ?C up to doses of 3 dpa were performed on ZrCx (where x ranges from 0.9 to 1.2) to investigate the damage evolution. The irradiation-induced defects, such as density of dislocation loops, at different stoichiometries and doses which were characterized by transmission electron microscopy (TEM) is presented and discussed.

Y. Huang; B.R. Maier; T.R. Allen

2014-10-01T23:59:59.000Z

319

surface science | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

surface science surface science Leads No leads are available at this time. Nonlinear Photoemission Electron Micrographs of Plasmonic Nanoholes in Gold Thin Films. Abstract:...

320

Transformation of Fine Microstructure of WWER-1000 Materials After High Dose Irradiation and Annealing  

SciTech Connect (OSTI)

High nickel WWER-1000 RPV materials were irradiated at high dose rate up to doses close to design values and exceeding these values. The complex investigation of the materials was carried out using LEAP, SEM, AES and Charpy tests. It has been shown that the DBTT shift was conditioned by formation of late-blooming phases (LBP) precipitates, but at a certain fluence this phenomenon looks to saturate. Nevertheless, even with a non-increasing number density of LBP, the DBTT shift continues to increase with fluence. This increase can be induced by intergranular embrittlement. SEM has shown the presence of intergranular fracture on Charpy fracture surfaces and AES revealed a phosphorus content in the grain boundaries (GB) about 20% at. A model of irradiation-induced GB segregation of phosphorus at high nickel content has been used to calculate the phosphorus content in the GBs. The calculations confirm the value obtained by AES and show a significant increase in the GB content at fluxes typical of normal WWER-1000 RPV operation. The same model shows further increase of phosphorus content in high Ni steels during post-irradiation annealing. Thus, in spite of LBP dissolution during early stages of annealing at 450C, full recovery of the DBTT could not be obtained due to intergranular embrittlement.

Zabusov, Oleg O. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Chernobaeva, A. A. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Nikolaev, Yury A. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Kuleshova, E. A. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Miller, Michael K [ORNL; Russell, Kaye F [ORNL; Nanstad, Randy K [ORNL

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Molecular Hydrogen Emission from Protoplanetary Disks II. Effects of X-ray Irradiation and Dust Evolution  

E-Print Network [OSTI]

Detailed models for the density and temperature profiles of gas and dust in protoplanetary disks are constructed by taking into account X-ray and ultraviolet (UV) irradiation from a central T Tauri star, as well as dust size growth and settling toward the disk midplane. The spatial and size distributions of dust grains in the disks are numerically computed by solving the coagulation equation for settling dust particles. The level populations and line emission of molecular hydrogen are calculated using the derived physical structure of the disks. X-ray irradiation is the dominant heating source of the gas in the inner disk region and in the surface layer, while the far UV heating dominates otherwise. If the central star has strong X-ray and weak UV radiation, the H2 level populations are controlled by X-ray pumping, and the X-ray induced transition lines could be observable. If the UV irradiation is strong, the level populations are controlled by thermal collisions or UV pumping, depending on the properties of...

Nomura, H; Tsujimoto, M; Nakagawa, Y; Millar, T J

2007-01-01T23:59:59.000Z

322

Evolution of the nanostructure OF VVER-1000 RPV materials under neutron irradiation and post irradiation annealing  

SciTech Connect (OSTI)

A high nickel VVER-1000 (15Kh2NMFAA) base metal (1.34 wt% Ni, 0.47% Mn, 0.29% Si and 0.05% Cu), and a high nickel (12Kh2N2MAA) weld metal (1.77 wt% Ni, 0.74% Mn, 0.26% Si and 0.07% Cu) have been characterized by atom probe tomography to determine the changes in the microstructure during neutron irradiation to high fluences. The base metal was studied in the unirradiated condition and after neutron irradiation to fluences between 2.4 and 14.9 x 10{sup 23} m{sup -2} (E > 0.5 MeV), and the weld metal was studied in the unirradiated condition and after neutron irradiation to fluences between 2.4 and 11.5 x 10{sup 23} m{sup -2} (E > 0.5 MeV). High number densities of 2-nm-diameter Ni-, Si- and Mn-enriched nanoclusters were found in the neutron irradiated base and weld metals. No significant copper enrichment was associated with these nanoclusters and no copper-enriched precipitates were observed. The number densities of these nanoclusters correlate with the shifts in the {Delta}T{sub 41 J} ductile-to-brittle transition temperature. These nanoclusters were present after a post irradiOffice of Science (US)C, but had dissolved into the matrix after 24 h at 450 C. Phosphorus, nickel, silicon and to a lesser extent manganese were found to be segregated to the dislocations.

Miller, Michael K [ORNL; Chernobaeva, A. A. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Shtrombakh, Ya. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Erak, D. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Zabusov, Oleg O. [Russian Research Center, Kurchatov Institute, Moscow, Russia; Russell, Kaye F [ORNL; Nanstad, Randy K [ORNL

2009-01-01T23:59:59.000Z

323

Dissolution of ordered precipitates under ion irradiation  

SciTech Connect (OSTI)

The stability of the ordered {gamma}{prime} precipitates under 300-keV Ni{sup +} irradiation was investigated between room temperature and 623 K. The two competing mechanisms of destabilization by cascade producing irradiation, i.e. disordering and dissolution of the {gamma}{prime} precipitates in Nimonic PE16 alloy, has been studied separately by electron microscopy and field-ion microscopy with atom probe. At high temperatures, the precipitates are stable. At intermediate temperatures, the precipitates dissolve by ballistic mixing into the matrix, but the interface is restored by the radiation-enhanced atomic jumps. The order in the precipitates remains stable. At low temperatures, the precipitates are dissolved by atomic mixing. The dissolution proceeds in a diffusional manner with a diffusion coefficient normalized by the displacement rate D/K = 0.75 nm{sup 2}dpa{sup {minus}1}. The precipitates become disordered by a fluence of 0.1 dpa, whereas precipitate dissolution needs much higher fluences.

Camus, E.; Bourdeau, F.; Abromeit, C.; Wanderka, N.; Wollenberger, H. [Hahn-Meitner-Institut Berlin GmbH (Germany)

1995-09-01T23:59:59.000Z

324

Phase transformations in neutron-irradiated Zircaloys  

SciTech Connect (OSTI)

Microstructural evolution in Zircaloy-2 and -4 spent-fuel cladding specimens after approx.3 years of irradiation in commercial power reactors has been investigated by TEM and HVEM. Two kinds of precipitates induced by the fast-neutron irradiation in the reactors have been identified, i.e., Zr/sub 3/O and cubic-ZrO/sub 2/ particles approximately 2 to 10 nm in size. By means of a weak-beam dark-field ''2-1/2D-microscopy'' technique, the bulk nature of the precipitates and the surficial nature of artifact oxide and hydride phases could be discerned. The Zr(Fe/sub x/,Cr/sub 1-x/)/sub 2/ and Zr/sub 2/(Fe/sub x/,Ni/sub 1-x/) intermetallic precipitates normally present in the as-fabricated material virtually dissolved in the spent-fuel cladding specimens after a fast-neutron fluence of approx.4 x 10/sup 21/ ncm/sup -2/ in the power reactors. The observed radiation-induced phase transformations are compared with predictions based on the currently available understanding of the alloy characteristics. 29 refs.

Chung, H.M.

1986-04-01T23:59:59.000Z

325

A Simplified Shuttle Irradiation Facility for ATR  

SciTech Connect (OSTI)

During the past fifteen years there has been a steady increase in the demand for radioisotopes in nuclear medicine and a corresponding decline in the number of reactors within the U.S. capable of producing them. The Advanced Test Reactor (ATR) is the largest operating test reactor in the U.S., but its isotope production capabilities have been limited by the lack of an installed isotope shuttle irradiation system. A concept for a simple "low cost" shuttle irradiation facility for ATR has been developed. Cost were reduced (in comparison to previous ATR designs) by using a shielded trough of water installed in an occupiable cubicle as a shielding and contamination control barrier for the send and receive station. This shielding concept also allows all control valves to be operated by hand and thus the need for an automatic control system was eliminated. It was determined that 4-5 ft of water would be adequate to shield the isotopes of interest while shuttles are transferred to a small carrier. An additional feature of the current design is a non-isolatable by-pass line, which provides a minimum coolant flow to the test region regardless of which control valves are opened or closed. This by-pass line allows the shuttle facility to be operated without bringing reactor coolant water into the cubicle except for send and receive operations.

A. J. Palmer; S. T. Laflin

1999-08-01T23:59:59.000Z

326

Optimisation of buildings' solar irradiation availability  

SciTech Connect (OSTI)

In order to improve the sustainability of new and existing urban settlements it is desirable to maximise the utilisation of the solar energy incident on the building envelope, whether by passive or active means. To this end we have coupled a multi-objective optimisation algorithm with the backwards ray tracing program RADIANCE which itself uses a cumulative sky model for the computation of incident irradiation (W h/m{sup 2}) in a single simulation. The parameters to optimise are geometric (the height of buildings up to their facade and the height and orientation of roofs), but with the constraint of maintaining an overall built volume, and the objective function is heating season solar irradiation offset by envelope heat losses. This methodology has been applied to a range of urban typologies and produces readily interpretable results. The focus of this work is on the design of new urban forms but the method could equally be applied to examine the relative efficiency of existing urban settlements, by comparison of existing forms with the calculated optima derived from relevant specifications of the building envelope. (author)

Kaempf, Jerome Henri; Montavon, Marylene; Bunyesc, Josep; Robinson, Darren [Solar Energy and Building Physics Laboratory, Station 18, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne (Switzerland); Bolliger, Raffaele [Industrial Energy Systems Laboratory, Station 9, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne (Switzerland)

2010-04-15T23:59:59.000Z

327

LWRS ATR Irradiation Testing Readiness Status  

SciTech Connect (OSTI)

The Light Water Reactor Sustainability (LWRS) Program was established by the U.S. Department of Energy Office of Nuclear Energy (DOE-NE) to develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the life of the current reactors. The LWRS Program is divided into four R&D Pathways: (1) Materials Aging and Degradation; (2) Advanced Light Water Reactor Nuclear Fuels; (3) Advanced Instrumentation, Information and Control Systems; and (4) Risk-Informed Safety Margin Characterization. This report describes an irradiation testing readiness analysis in preparation of LWRS experiments for irradiation testing at the Idaho National Laboratory (INL) Advanced Test Reactor (ATR) under Pathway (2). The focus of the Advanced LWR Nuclear Fuels Pathway is to improve the scientific knowledge basis for understanding and predicting fundamental performance of advanced nuclear fuel and cladding in nuclear power plants during both nominal and off-nominal conditions. This information will be applied in the design and development of high-performance, high burn-up fuels with improved safety, cladding integrity, and improved nuclear fuel cycle economics

Kristine Barrett

2012-09-01T23:59:59.000Z

328

Effect of defect imbalance on void swelling distributions produced in pure iron irradiated with 3.5 MeV self-ions  

SciTech Connect (OSTI)

Ion irradiation has been widely used to simulate neutron-induced radiation damage. There are a number of features of ion-induced damage that differ from neutron-induced damage, however, and these differences require investigation before ion data can be confidently used to predict behavior arising from neutron bombardment. In this study 3.5 MeV self-ion irradiation of pure iron was used to study the influence on void swelling of the depth-dependent defect imbalance between vacancies and interstitials that arises from various surface effects, forward scattering of displaced atoms, and especially the injected interstitial effect. It was observed that the depth dependence of void swelling does not follow the behavior anticipated from the depth dependence of the damage rate. Void nucleation and growth develop first in the lower-dose, near-surface region, and then moves to progressively deeper and higher-damage depths during continued irradiation. This indicates a strong initial suppression of void nucleation in the peak damage region that is eventually overcome with continued irradiation. Using the Boltzmann transport equation method, this phenomenon is shown to be due to depth-dependent defect imbalances created under ion irradiation. These findings demonstrate that void swelling does not depend solely on the local dose level and that this sensitivity of swelling to depth must be considered in extraction and interpretation of ion-induced swelling data. 2014 El

Lin Shao; C.-C. Wei; J. Gigax; A. Aitkaliyeva; D. Chen; B.H. Sencer; F.A. Garner

2014-10-01T23:59:59.000Z

329

NASA Notice of Intent (NOI) to release Cooperative Agreement Notice (CAN) entitled 2011 Summer of Innovation Project  

E-Print Network [OSTI]

: nspires.nasaprs.com Office Address ========================== NASA Educational Programs Office, NASA Glenn NAIS Posted Date: January 12, 2011 Response Date: N/A Classification Code: N/A Internet Address. Summer of Innovation (SoI) is an intensive STEM teaching and learning program that targets middle school

330

36Super-fast solar flares ! NASA's Ramaty High Energy Solar  

E-Print Network [OSTI]

36Super-fast solar flares ! NASA's Ramaty High Energy Solar Spectroscopic Imager (RHESSI) satellite has been studying solar flares since 2002. The sequence of figures to the left shows a flaring region hr/3600 sec = 0.98 kilometers/sec. The solar flare blob was traveling at 207 kilometers per second

331

National Aeronautics and Space Administration NASA embarks on the Tropical Composition,  

E-Print Network [OSTI]

role in determining how much solar energy is trapped in Earth's atmosphere. The TTL is the transitional capacity AC/DC electrical system, permitting it to carry a variety of payloads on a single mission Research Center Moffett Field, California, 94035 www.nasa.gov TC4 ER-2 Aircraft Platform Instruments

332

REQUEST FOR INFORMATION -NASA OFFICE OF THE CHIEF TECHNOLOGIST EARLY STAGE  

E-Print Network [OSTI]

. NIAC is part of OCT's Early Stage Innovation (ESI) Division. ESI efforts are expected to #12;be short Exploration Technology Program: A Review of NASA's Exploration Technology Development Program, 2008, http://www.nap.edu/catalog.php?record_id Stone to the Future of Space Exploration: A Workshop Report, 2004, http://www.nap.edu/catalog.php?record_id

Christian, Eric

333

NOAA/NASA Global Hawk Collaboration By Michael Black NOAA/AOML/HRD  

E-Print Network [OSTI]

scientists collaborated in the effort to conduct a first ever high-altitude flyover of a tropical cyclone were at their assigned stations in a specially designed operations room at the NASA Dryden Research, and scientific instrument status. They were prepared to staff, conduct, and monitor this flight for up to 18

334

TO: Airborne Science Program FAX: (202) 358-2770 NASA Headquarters Voice: (202) 358-2890  

E-Print Network [OSTI]

3F71 Attn: Bruce Tagg bruce.a.tagg@nasa.gov Flight Report Aircraft : N426NA P-3B Orion Operating to be initiated from 3.5 kft and another over Padonia was held below 6 kft by ATC. Code orange conditions largely

335

The World Wide Web and Technology Transfer at NASA Langley Research Center  

E-Print Network [OSTI]

The World Wide Web and Technology Transfer at NASA Langley Research Center Michael L. Nelson with a reorganization of LaRC to provide a more concentrated focus on technology transfer to both aerospace and non allows for the implementation, evolution and integration of many technology transfer applications

Nelson, Michael L.

336

X-ray technology behind NASA's black-hole hunter (NuSTAR)  

ScienceCinema (OSTI)

Livermore Lab astrophysicist Bill Craig describes his team's role in developing X-ray imaging technology for the NASA Nuclear Spectroscopic Telescope Array (NuSTAR) mission. The black-hole-hunting spacecraft bagged its first 10 supermassive black holes this week

Craig, Bill

2014-05-22T23:59:59.000Z

337

MAVEN overview MAVEN is a NASA Mars Scout mission designed to orbit Mars  

E-Print Network [OSTI]

) instrument is part of Above: MAVEN team members deployed the solar panels before the spacecraft's delivery. ·NASA Jet Propulsion Laboratory ·United Launch Alliance (Courtesy Lockheed Martin) #12, will measure solar input across three channels. Science operations The MAVEN Science Operations Center (SOC

Mojzsis, Stephen J.

338

Through the Innovative Partnerships Program, NASA fosters partnerships among researchers, academia  

E-Print Network [OSTI]

InsideAerovations Fighting fire Systems technology helps NASA and the U.S. Forest Service determine;Rolling Hills uses IPP funding to advance technology and commercial products Student assists with Reliable and deliver critical information to forest fire com- manders. NTR valuable for researchers New technology

339

www.nasa.gov/aeronautics NF-2013-05-565-HQ  

E-Print Network [OSTI]

, emissions and fuel burn. A greener future for aviation holds the promise of new life for airports, because Headquarters 300 E. Street, SW Washington, DC 20546 NASA Facts Green Aviation: A Better Way to Treat the Planet engine emissions, unprecedented traffic jams in the sky, nonstop noise near airports, and more citizens

340

Arc-Jet Complex POC: george.a.raiche@nasa.gov  

E-Print Network [OSTI]

-of-the-art aeroshell design and development; high enthalpy aero-thermal modeling and testing; high temperature material, and high speed Earth re-entry Conformal TPS: Reduces part count, eliminates gap issues, simplifies system.j.conerlison@nasa.gov Unique high enthalpy environmental simulation capability that serves customer-driven aero

Note: This page contains sample records for the topic "irradiance nasa surface" 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

ISO 191** Standards for NASA SiriJodha Singh Khalsa, Lead  

E-Print Network [OSTI]

ISO 191** Standards for NASA SiriJodha Singh Khalsa, Lead MENDS Tiger Team to support ISO metadata GCMD and ECHO both acGvely working on ISO Missions and data centers looking at ISO FGDC has endorsed ISO 19115 OMB mandated all

Christian, Eric

342

36.258 UE -Woods calibrates instru-ment on NASA's new solar observa-  

E-Print Network [OSTI]

/2 The solar X-ray image from EVE is shown in the left panel. An X-ray image only shows the active regions on the sun. The top right panel shows a small part of the solar EUV spectrum. The bottom right panel shows36.258 UE - Woods calibrates instru- ment on NASA's new solar observa- tory. Photosby

Christian, Eric

343

American Institute of Aeronautics and Astronautics 1 Paradigm Shift in Design for NASA's Space Exploration  

E-Print Network [OSTI]

. The new design process is defined and then applied to the space exploration system with decisions Exploration Initiative: Results from MIT's Spring 2004 Study Christine Taylor* , David Broniatowski , Ryan implications of NASA's new space exploration initiative at the value, system architecture and vehicle levels

de Weck, Olivier L.

344

Combining Unit-level Symbolic Execution and System-level Concrete Execution for Testing NASA  

E-Print Network [OSTI]

Combining Unit-level Symbolic Execution and System-level Concrete Execution for Testing NASA-level concrete execution for generating test cases that satisfy user-specified testing criteria. We have to testing complex safety critical software that combines unit-level symbolic execution and system

Pasareanu, Corina

345

Transforming BIM to BEM: Generation of Building Geometry for the NASA Ames  

E-Print Network [OSTI]

LBNL-6033E Transforming BIM to BEM: Generation of Building Geometry for the NASA Ames by Tobias Maile and expanded by Cody Rose. #12;Transforming BIM to BEM: Generation of Building Geometry Ames project and was the enabling software that facilitated semi-automated data transformations. GST

346

NASA's DISCOVER-AQ and UMD's RAMMPP: Policy relevant science for improving air quality in Maryland  

E-Print Network [OSTI]

NASA's DISCOVER-AQ and UMD's RAMMPP: Policy relevant science for improving air quality in Maryland's air? · Krotkov (11 am) Using OMI (and OMPS) for SO2 emissions. · Kollonige ­ Model sensitivity & O3 In 2010, Maryland implemented the "Healthy Air Act" 4 #12;Power Plant Emissions in Maryland. The following

Jacob, Daniel J.

347

Removal of a liquid paraffin film from a water surface by short pulses from a CO{sub 2} laser  

SciTech Connect (OSTI)

The process of removal of a liquid paraffin film from a water surface irradiated by 40 - 270-{mu}s pulses from a CO{sub 2} laser is studied experimentally and theoretically. It is found for the first time that the mass of removed paraffin can exceed that of paraffin located in the region irradiated by the laser pulse. A theoretical model is proposed which explains the results obtained. (laser applications and other topics in quantum electronics)

Antonova, L I; Drobyazko, S V; Evdokimov, I A; Krasyukov, A G; Likhanskii, V V; Loboiko, A I; Senatorov, Yu M [State Research Center of Russian Federation 'Troitsk Institute for Innovation and Fusion Research', Troitsk, Moscow Region (Russian Federation)

2002-02-28T23:59:59.000Z

348

Postharvest irradiation treatment effect on grapefruit functional components and their role in prevention of colon cancer  

E-Print Network [OSTI]

and irradiation significantly (P ? 0.05) affected the bioactive compounds in grapefruit, however, the effect of storage was prominent. The third study examined the influence of irradiation and freeze drying on bioactive compounds of grapefruit. Irradiation...

Vanamala, Jairam Krishna Prasad

2005-11-01T23:59:59.000Z

349

SHORT COMMUNICATION Microbeam irradiation of C. elegans nematode in microfluidic  

E-Print Network [OSTI]

SHORT COMMUNICATION Microbeam irradiation of C. elegans nematode in microfluidic channels M implemented a microfluidic tool for microbeam irradiation of Caenorhabditis elegans. The device allows into the microfluidic device through liquid flow between an inlet and an outlet, and the size of each microchannel

Brenner, David Jonathan

350

Retention of Hydrogen Isotopes in Neutron Irradiated Tungsten  

SciTech Connect (OSTI)

To investigate the effects of neutron irradiation on hydrogen isotope retention in tungsten, disk-type specimens of pure tungsten were irradiated in the High Flux Isotope Reactor in Oak Ridge National Laboratory followed by exposure to high flux deuterium (D) plasma in Idaho National Laboratory. The results obtained for low dose n-irradiated specimens (0.025 dpa for tungsten) are reviewed in this paper. Irradiation at coolant temperature of the reactor (around 50 degrees C) resulted in the formation of strong trapping sites for D atoms. The concentrations of D in n-irradiated specimens were ranging from 0.1 to 0.4 mol% after exposure to D plasma at 200 and 500 degrees C and significantly higher than those in non-irradiated specimens because of D-trapping by radiation defects. Deep penetration of D up to a depth of 50-100 m was observed at 500 degrees C. Release of D in subsequent thermal desorption measurements continued up to 900 degrees C. These results were compared with the behaviour of D in ion-irradiated tungsten, and distinctive features of n-irradiation were discussed.

Yuji Hatano; Masashi Shimada; Yasuhisa Oya; Guoping Cao; Makoto Kobayashi; Masanori Hara; Brad J. Merrill; Kenji Okuno; Mikhail A. Sokolov; Yutai Katoh

2013-03-01T23:59:59.000Z

351

Irradiation effects in high-density polyethylene Jussi Polvia  

E-Print Network [OSTI]

Irradiation effects in high-density polyethylene Jussi Polvia , Kai Nordlunda a simulations, we have studied the irradiation effects in high density polyethylene. We determined the threshold energy for creating defects in the polyethylene lattice as a function of the incident angle. We found

Nordlund, Kai

352

Asymmetric Orientational Writing in glass with femtosecond laser irradiation  

E-Print Network [OSTI]

Asymmetric Orientational Writing in glass with femtosecond laser irradiation B. Poumellec,1 M in the dielectric inducing an asymmetric stress field is proposed. ©2013 Optical Society of America OCIS codes: (160. Prade, and A. Mysyrowicz, "Femtosecond laser irradiation stress induced in pure silica," Opt. Express 11

Boyer, Edmond

353

Physica B 308310 (2001) 612615 Irradiation effects in semiconducting diamonds  

E-Print Network [OSTI]

Physica B 308­310 (2001) 612­615 Irradiation effects in semiconducting diamonds N. Kristianpoller irradiation on semiconducting diamonds (type IIb) were studied and compared with those induced at the same conditions in natural (type Ia) and in synthetic diamonds. Methods of optical absorption, of X-ray and light

Chen, Reuven

354

SPECTRAL SOLAR IRRADIANCE AND ITS ENTROPIC EFFECT ON EARTH'S CLIMATE  

E-Print Network [OSTI]

SPECTRAL SOLAR IRRADIANCE AND ITS ENTROPIC EFFECT ON EARTH'S CLIMATE Wei Wu1 , Yangang Liu1 of the spectral solar irradiance (SSI) at the top of the Earth's atmosphere by the Solar Radiation and Climate's entropy flux from the TOA incident solar radiation. Two extreme cases are examined by using Planck

355

Standard Guide for Packaging Materials for Foods to Be Irradiated  

E-Print Network [OSTI]

1.1 This guide provides a format to assist producers and users of food packaging materials in selecting materials that have the desirable characteristics for their intended use and comply with applicable standards or government authorizations. It outlines parameters that should be considered when selecting food-contact packaging materials intended for use during irradiation of prepackaged foods and it examines the criteria for fitness for their use. 1.2 This guide identifies known regulations and regulatory frameworks worldwide pertaining to packaging materials for holding foods during irradiation; but it does not address all regulatory issues associated with the selection and use of packaging materials for foods to be irradiated. It is the responsibility of the user of this guide to determine the pertinent regulatory issues in each country where foods are to be irradiated and where irradiated foods are distributed. 1.3 This guide does not address all of the food safety issues associated with the synergisti...

American Society for Testing and Materials. Philadelphia

2009-01-01T23:59:59.000Z

356

Pulsed-ion-beam nitriding and smoothing of titanium surface in a vacuum  

SciTech Connect (OSTI)

Both nitriding and smoothing of titanium have been achieved under irradiation of intense pulsed ion beam in a vacuum of 2x10{sup -2} Pa. Applying a screening method, we find that medium ion-beam intensity and multi-shot irradiation are effective for the processing, where repetitive surface melting with limited ablation favored Ti nitride formation as well as surface smoothing. The present results demonstrate that ambient gas atoms/molecules can be efficiently incorporated in metal matrices to form compounds under the ion-beam irradiation. The finding is of great significance for extending application scope of the ion-beam technique in materials research and processing, combined with the recent success in introducing ambient gas into the processing chamber.

Zhu, X.P.; Suematsu, Hisayuki; Jiang Weihua; Yatsui, Kiyoshi; Lei, M.K. [Extreme Energy-Density Research Institute, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan); Surface Engineering Laboratory, Department of Materials Engineering, Dalian University of Technology, Dalian 116024 (China)

2005-08-29T23:59:59.000Z

357

Thermal Effects Induced by Laser Irradiation of Solids  

SciTech Connect (OSTI)

A part of incident energy is absorbed within the irradiated sample when a solid is exposed to the influence of laser radiation, to more general electromagnetic radiation within the wide range of wavelengths (from microwaves, to infrared radiation to X-rays), or to the energy of particle beams (electronic, protonic, or ionic). The absorption process signifies a highly selective excitation of the electronic state of atoms or molecules, followed by thermal and non-thermal de-excitation processes. Non-radiation de-excitation-relaxation processes induce direct sample heating. In addition, a great number of non-thermal processes (e.g., photoluminescence, photochemistry, photovoltage) may also induce heat generation as a secondary process. This method of producing heat is called the photothermal effect.The photothermal effect and subsequent propagation of thermal waves on the surface and in the volume of the solid absorbing the exciting beam may produce the following: variations in the temperature on the surfaces of the sample; deformation and displacement of surfaces; secondary infrared radiation (photothermal radiation); the formation of the gradient of the refractivity index; changes in coefficients of reflection and absorbtion; the generation of sound (photoacoustic generation), etc. These phenomena may be used in the investigation and measurement of various material properties since the profile and magnitude of the generated signal depend upon the nature of material absorbing radiation. A series of non-destructive spectroscopic, microscopic and defectoscopic detecting techniques, called photothermal methods, is developed on the basis of the above-mentioned phenomena.This paper outlines the interaction between the intensity modulated laser beam and solids, and presents a mathematical model of generated thermal sources. Generalized models for a photothermal response of optically excited materials have been obtained, including thermal memory influence on the propagation of thermal perturbation. Focus is on optically opaque media. The derived models are compared to existing models neglecting the thermal memory effect. In this way it has been possible to determine the range of value of existing models and to indicate the additional employment of photothermal methods in determining through experimentation the thermal memory properties of solids. These properties have not as yet been experimentally determined in any medium, nor has the methodology for the experimental measurement of thermal memory parameters been suggested in the literature. Their recognition is highly significant not only for further fundamental research, but for many modern applications as well.

Galovic, S. [Vinca Institute of Nuclear Sciences, P. O. Box 522, 11001 Belgrade, Serbia (Serbia and Montenegro)

2004-12-01T23:59:59.000Z

358

E-Print Network 3.0 - accelerated partial-breast irradiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

irradiated for one hour... 1 Irradiation of Nd-Fe-B Permanent Magnets with APS Bending Magnet ... Source: Kemner, Ken - Biosciences Division, Argonne National Laboratory...

359

Summary Report on Information Technology Integration Activities For project to Enhance NASA Tools for Coastal Managers in the Gulf of Mexico and Support Technology Transfer to Mexico  

SciTech Connect (OSTI)

Deliverable to NASA Stennis Space Center summarizing summarizes accomplishments made by Battelle and its subcontractors to integrate NASA's COAST visualization tool with the Noesis search tool developed under the Gulf of Mexico Regional Collaborative project.

Gulbransen, Thomas C.

2009-04-27T23:59:59.000Z

360

NASA/TM2012-104606/Vol 28 Andrea Molod, Lawrence Takacs, Max Suarez, Julio Bacmeister, In-Sun Song, and Andrew Eichmann  

E-Print Network [OSTI]

and Development from MERRA to Fortuna #12;Since its founding, NASA has been dedicated to the advancement The GEOS-5 Atmospheric General Circulation Model: Mean Climate and Development from MERRA to Fortuna NASA

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Instrumentation to Enhance Advanced Test Reactor Irradiations  

SciTech Connect (OSTI)

The Department of Energy (DOE) designated the Advanced Test Reactor (ATR) as a National Scientific User Facility (NSUF) in April 2007 to support U.S. leadership in nuclear science and technology. By attracting new research users - universities, laboratories, and industry - the ATR will support basic and applied nuclear research and development, further advancing the nation's energy security needs. A key component of the ATR NSUF effort is to prove new in-pile instrumentation techniques that are capable of providing real-time measurements of key parameters during irradiation. To address this need, an assessment of instrumentation available and under-development at other test reactors has been completed. Based on this review, recommendations are made with respect to what instrumentation is needed at the ATR and a strategy has been developed for obtaining these sensors. Progress toward implementing this strategy is reported in this document. It is anticipated that this report will be updated on an annual basis.

J. L. Rempe; D. L. Knudson; K. G. Condie; J. E. Daw; S. C. Taylor

2009-09-01T23:59:59.000Z

362

Irradiation behavior of metallic fast reactor fuels  

SciTech Connect (OSTI)

Metallic fuels were the first fuels chosen for liquid metal cooled fast reactors (LMR's). In the late 1960's world-wide interest turned toward ceramic LMR fuels before the full potential of metallic fuel was realized. However, during the 1970's the performance limitations of metallic fuel were resolved in order to achieve a high plant factor at the Argonne National Laboratory's Experimental Breeder Reactor II. The 1980's spawned renewed interest in metallic fuel when the Integral Fast Reactor (IFR) concept emerged at Argonne National Laboratory. A fuel performance demonstration program was put into place to obtain the data needed for the eventual licensing of metallic fuel. This paper will summarize the results of the irradiation program carried out since 1985.

Pahl, R.G.; Porter, D.L.; Crawford, D.C.; Walters, L.C.

1991-01-01T23:59:59.000Z

363

Optimization parameter design for proton irradiation accelerator  

E-Print Network [OSTI]

The proton irradiation accelerator is widely founded for industry application, and should be designed as compact, reliable, and easy operate. A 10 MeV proton beam is designed to be injected into the slow circulation ring with the repetition rate of 0.5 Hz for accumulation and acceleration, and then the beam with the energy of 300MeV will be slowly extracted by third order resonance method. For getting a higher intensity and more uniform beam, the height of the injection bump is carefully optimised during the injection period. Besides, in order to make the extracted beam with a more uniform distribution, a RF Knock-out method is adopted, and the RF kicker's amplitude is well optimised.

Yu-Wen An; Hong-Fei Ji; Sheng Wang; Shou-Yan Xu

2014-11-20T23:59:59.000Z

364

Recovery of niobium from irradiated targets  

DOE Patents [OSTI]

A process for selective separation of niobium from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, contacting the first ion-containing solution with a cationic resin whereby ions selected form the group consisting of molybdenum, biobium, technetium, selenium, vanadium, arsenic, germanium, zirconium and rubidium remain in a second ion-containing solution while ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, strontium, yttrium and zirconium are selectively adsorbed by the cationic resin; adjusting the pH of the second ion-containing solution to within a range of from about 5.0 to about 6.0; contacting the pH adjusting second ion-containing solution with a dextran-based material for a time to selectively separate niobium from the solution and recovering the niobium from the dextran-based material.

Phillips, Dennis R. (Los Alamos, NM); Jamriska, Sr., David J. (Los Alamos, NM); Hamilton, Virginia T. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

365

Ice friction: The effects of surface roughness, structure, and hydrophobicity  

SciTech Connect (OSTI)

The effect of surface roughness, structure, and hydrophobicity on ice friction is studied systematically over a wide range of temperature and sliding speeds using several metallic interfaces. Hydrophobicity in combination with controlled roughness at the nanoscale is achieved by femtosecond laser irradiation to mimic the lotus effect on the slider's surface. The controlled roughness significantly increases the coefficient of friction at low sliding speeds and temperatures well below the ice melting point. However, at temperatures close to the melting point and relatively higher speeds, roughness and hydrophobicity significantly decrease ice friction. This decrease in friction is mainly due to the suppression of capillary bridges in spite of the presence of surface asperities that facilitate their formation. Finally, grooves oriented in the sliding direction also significantly decrease friction in the low velocity range compared to scratches and grooves randomly distributed over a surface.

Kietzig, Anne-Marie; Hatzikiriakos, Savvas G.; Englezos, Peter [Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia V6T 1Z3 (Canada)

2009-07-15T23:59:59.000Z

366

AGC-3 Irradiation Data Qualification Final Report  

SciTech Connect (OSTI)

The Graphite Technology Development Program will run a series of six experiments to quantify the effects of irradiation on nuclear grade graphite. The third experiment, Advanced Graphite Creep 3 (AGC 3), began with Advanced Test Reactor (ATR) Cycle 152B on November 27, 2012, and ended with ATR Cycle 155B on April 23, 2014. This report documents qualification of AGC 3 experiment irradiation monitoring data for use by the Very High Temperature Reactor (VHTR) Technology Development Office (TDO) Program for research and development activities required to design and license the first VHTR nuclear plant. Qualified data meet the requirements for data collection and use as described in the experiment planning and quality assurance documents. Failed data do not meet the requirements. Trend data may not meet the requirements, but may still provide some useable information. All thermocouples (TCs) functioned throughout the AGC 3 experiment. There was one interval between December 18, 2012, and December 20, 2012, where 10 NULL values were reported for various TCs. These NULL values were deleted from the Nuclear Data Management and Analysis System database. All temperature data are Qualified for use by the VHTR TDO Program. Argon, helium, and total gas flow data were within expected ranges and are Qualified for use by the VHTR TDO Program. Total gas flow was approximately 50 sccm through the AGC 3 experiment capsule. Helium gas flow was briefly increased to 100 sccm during ATR shutdowns. At the start of the AGC 3 experiment, moisture in the outflow gas line was stuck at a constant value of 335.6174 ppmv for the first cycle (Cycle 152B). When the AGC 3 experiment capsule was reinstalled in ATR for Cycle 154B, a new moisture filter was installed. Moisture data from Cycle 152B are Failed. All moisture data from the final three cycles (Cycles 154B, 155A, and 155B) are Qualified for use by the VHTR TDO Program.

Laurence Hull

2014-08-01T23:59:59.000Z

367

Applied Surface Science 289 (2014) 358365 Contents lists available at ScienceDirect  

E-Print Network [OSTI]

Surface Science journal homepage: www.elsevier.com/locate/apsusc Electron irradiation-enhanced water of the conventional optical lithography for further reduction in feature size with a reasonable resolution [2 of the EUV optics [5,6]. Carbon contamination in EUV optics is caused by EUV induced dissociation

Harilal, S. S.

368

Non-linear optical properties of surfaces : Extraction of the signal  

E-Print Network [OSTI]

is strong enough, we get non-linear effects in materials Raman effect in optical fiber[1] HarmonicNon-linear optical properties of surfaces : Extraction of the signal Nicolas Tancogne-Dejean and Valérie Véniard Laboratoire des Solides Irradies, Ecole Polytechnique CNRS 91128 Palaiseau, France 1 Young

Botti, Silvana

369

A model for the ultrasonic detection of surface-breaking cracks by the Scanning  

E-Print Network [OSTI]

). The generation of ultrasound by laser irradiation provides a number of advantages over the conventional of ultrasonic waves, use of fiber op- tics, narrow-band and broad-band generation, absolute measurements, surface ultrasonic waves can be detected using piezoelectric (PZT) or EMAT transducers, or optical

Huerta, Antonio

370

Evidence for surface initiated solidification in Ge films upon picosecond laser pulse irradiation  

E-Print Network [OSTI]

. Siegel,a) J. Solis, and C. N. Afonso Instituto de Optica, CSIC, C/Serrano 121, 28006 Madrid, Spain F. Vega Department d'Optica i Optometria, Universitat Politecnica de Catalunya, C/Violinista Vellsola 37

von der Linde, D.

371

2013 ISES Solar World Congress Review of satellite-based surface solar irradiation databases for  

E-Print Network [OSTI]

, either photovoltaic (PV) or thermal solar. This paper focuses on PV but can surely be extended to thermal solar technology such as concentrating solar power (CSP). PV project developers first need to identify. For that purpose, simulation software such as PVSyst (www.pvsyst.com) considers the behavior of the whole system

Recanati, Catherine

372

INL Internship:Modification of Metal Contaminants on Oxide Surfaces Modified by Laser Irradiation  

SciTech Connect (OSTI)

This project focuses on obtaining the optimal laser parameters needed for enhancing metal contaminants on cement, granite, and marble. The various parameters of the laser tested include the fluence, wavelength, and frequency. A chelating study was also performed in order to increase the volatility of cobalt. In the following paper each experiment is described in detail. No results are included in this report because their release is not approved and they could eventually become classified.

Michael J. Hansen; Robert Fox; Les Manner

2006-08-01T23:59:59.000Z

373

Use of Aeronet Aerosol Retrievals to Calculate Clear-Sky Irradiance at the Surface  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched Ferromagnetism inS-4500II Field Emission SEM withSecurityUranium(VI)ARM/NSA Data

374

Random Walk on the Surface of the Sun Chung-Sang Ng  

E-Print Network [OSTI]

://en.wikipedia.org/wiki/Image:Wiens_law.svg max = b/T Light from the sun has a spectrum peaks ~ 500 nm ==> solar surface ~ 6000 K A spectrum peaks problem of the solar corona. · Parker's model for the heating of solar corona based on formation ~ 3 nm (X-ray) ==> T ~ 106 K #12;Solar corona: heating problem [http://science.nasa.gov/ssl/PAD/solar

Ng, Chung-Sang

375

surface chemistry | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

surface chemistry surface chemistry Leads No leads are available at this time. FeSSZ-13 as an NH3-SCR Catalyst: A Reaction Kinetics and FTIRMssbauer Spectroscopic Study....

376

Indoor and Outdoor Spectroradiometer Intercomparison for Spectral Irradiance Measurement  

SciTech Connect (OSTI)

This report details the global spectral irradiance intercomparison using spectroradiometers that was organized by the National Renewable Energy Laboratory's Solar Radiation Research Laboratory. The intercomparison was performed both indoors and outdoors on September 17, 2013. Five laboratories participated in the intercomparison using 10 spectroradiometers, and a coordinated measurement setup and a common platform were employed to compare spectral irradiances under both indoor and outdoor conditions. The intercomparison aimed to understand the performance of the different spectroradiometers and to share knowledge in making spectral irradiance measurements. This intercomparison was the first of its kind in the United States.

Habte, A.; Andreas, A.; Ottoson, L.; Gueymard, C.; Fedor, G.; Fowler, S.; Peterson, J.; Naranen, R.; Kobashi, T.; Akiyama, A.; Takagi, S.

2014-05-01T23:59:59.000Z

377

Gamma irradiation effects on the biodegradation of lignin  

E-Print Network [OSTI]

parts: biological utilization of irradiated Calcium Lignosulphonate (CLS) and irradiation effects on the composition of CLS. The CLS used in this study was a commercially available lignin compound which is produced by flash evaporation of spent... 4/ X / 2. 0 3. 0 4. 0 5. 0 6. 0 7. 0 Wavelength in microns 8. 0 9. 0 28 CHAPTER VI RESULTS AND CONCLUSIONS A commercia I CLS was irradiated in a dry state to various total dose levels of Co-60 gamma rays. The effects on the structure...

Krysinski, Thomas Leon

1966-01-01T23:59:59.000Z

378

Electron Beam Irradiation for Improving Safety of Fruits and Vegetables  

E-Print Network [OSTI]

. An alternative may be irradiation which is emerging as a promising tool to enhance safety and extend shelf life of fresh and fresh cut produce. Gamma rays have been the most extensively studied form of irradiation and have been successfully applied to spices..., tubers, grains and meat products for the space program. However, consumer reluctance has limited its application over a broad range of food stuffs. As a result, alternate irradiation technologies such as e-beam and X-rays are attracting attention...

Adavi, Megha Sarthak

2012-07-16T23:59:59.000Z

379

Total Ozone Mapping Spectrometer (TOMS) Derived Data, Global Earth Coverage (GEC) from NASA's Earth Probe Satellite  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

This is data from an external datastream processed through the ARM External Data Center (XDC) at Brookhaven National Laboratory. The XDC identifies sources and acquires data, called "external data", to augment the data being generated within the ARM program. The external data acquired are usually converted from native format to either netCDF or HDF formats. The GEC collection contains global data derived from the Total Ozone Mapping Spectrometer (TOMS) instrument on the Earth Probe satellite, consisting of daily values of aerosol index, ozone and reflectivity remapped into a regular 1x1.25 deg grid. Data are available from July 25, 1996 - December 31, 2005, but have been updated or replaced as of September 2007. See the explanation on the ARM web site at http://www.arm.gov/xds/static/toms.stm and the information at the NASA/TOMS web site: http://toms.gsfc.nasa.gov/ (Registration required)

380

SURFACE TENSION DRIVEN CONVECTION  

E-Print Network [OSTI]

SURFACE TENSION DRIVEN CONVECTION DIJKSTRA, SENGUL, WANG INTRODUCTION LINEAR THEORY MAIN THEOREMS CONCLUDING REMARKS DYNAMIC TRANSITIONS OF SURFACE TENSION DRIVEN CONVECTION H.Dijkstra T. Sengul S. Wang #12;SURFACE TENSION DRIVEN CONVECTION DIJKSTRA, SENGUL, WANG INTRODUCTION LINEAR THEORY MAIN THEOREMS

Wang, Shouhong

Note: This page contains sample records for the topic "irradiance nasa surface" 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

NASA's New Spacecraft: Orion The Orion spacecraft will launch aboard the Space Launch System  

E-Print Network [OSTI]

) 1 2 3 54 Fold each solar panel in half and tape together. Tape the 4 solar panels to the inside;www.nasa.gov NP-2014-06-1004-HQ 44 45 44 45 49 50 #12;46 46 #12;44 45 44 45 46 46 SOLAR PANEL SOLAR experiments and cargo. The Orion and SLS will take astronauts farther into the solar system than ever before

Rathbun, Julie A.

382

Regional Super ESPC Saves Energy and Dollars at NASA Johnson Space Center  

Broader source: Energy.gov [DOE]

NASA will save approximately $43 million in facility operations costs over the next 23 years at the Johnson Space Flight Center (JSC) in Houston, Texas, thanks to the largest delivery order signed to date under a Regional Super Energy Savings Performance Contract (Super ESPC). The U. S. Department of Energy's Federal Energy Management Program (FEMP) instituted these special Regional Super ESPCs to streamline the financing process for Federal agencies.

383

NASA/DOE/DOD nuclear propulsion technology planning: Summary of FY 1991 interagency panel results  

SciTech Connect (OSTI)

Interagency (NASA/DOE/DOD) technical panels worked in 1991 to evaluate critical nuclear propulsion issues, compare nuclear propulsion concepts for a manned Mars mission on a consistent basis, and to continue planning a technology development project for the Space Exploration Initiative (SEI). Panels were formed to address mission analysis, nuclear facilities, safety policy, nuclear fuels and materials, nuclear electric propulsion technology, and nuclear thermal propulsion technology. A summary of the results and recommendations of the panels is presented.

Clark, J.S.; Wickenheiser, T.J.; Doherty, M.P.; Marshall, A.; Bhattacharryya, S.K.; Warren, J.

1992-01-01T23:59:59.000Z

384

Pyrolytic carbon free-radical evolution and irradiation damage of polyimide under low-energy proton irradiation  

SciTech Connect (OSTI)

Ionization and displacement effects are basic phenomena in damage processes of materials under space-particle irradiation. In this paper, the damage behaviors were investigated on the polyimide under proton irradiation using electron paramagnetic resonance (EPR) spectra analysis and optical absorbance valuation. The results indicate that the proton irradiation induces the formation of pyrolytic carbon free-radical with a g value of 2.0025, and the population of free radicals increases with the irradiation fluence. The most important finding is that the irradiation-induced free-radical population increases linearly with the displacement damage dose, as does the optical degradation, whereas the ionization effect alone, during the irradiation, cannot induce the formation of pyrolytic carbon free radical. Furthermore, during the post storage, after irradiation, the free-radical population decreases following a sum of an exponential and a linear mode with the storage time. It is interesting that, during the post storage, the recovery of the degraded optical absorbance of the polyimide follows a similar mode to that of free radicals, and the characteristic time constant changes with the wavelength of the optical spectra.

Sun Chengyue; Wu Yiyong; Xiao Jingdong; Li Ruifeng; Yang Dezhuang; He Shiyu [National Key Lab in Materials Behaviors and Evaluation Technology in Space Environments, Harbin Institute of Technology, Harbin 150001 (China)

2011-12-15T23:59:59.000Z

385

Comparison of crystal growth and thermoelectric properties of n-type Bi-Se-Te and p-type Bi-Sb-Te nanocrystalline thin films: Effects of homogeneous irradiation with an electron beam  

SciTech Connect (OSTI)

The effects of homogenous electron beam (EB) irradiation on the crystal growth and thermoelectric properties of n-type Bi-Se-Te and p-type Bi-Sb-Te thin films were investigated. Both types of thin films were prepared by flash evaporation, after which homogeneous EB irradiation was performed at an acceleration voltage of 0.17?MeV. For the n-type thin films, nanodots with a diameter of less than 10?nm were observed on the surface of rice-like nanostructures, and crystallization and crystal orientation were improved by EB irradiation. The resulting enhancement of mobility led to increased electrical conductivity and thermoelectric power factor for the n-type thin films. In contrast, the crystallization and crystal orientation of the p-type thin films were not influenced by EB irradiation. The carrier concentration increased and mobility decreased with increased EB irradiation dose, possibly because of the generation of defects. As a result, the thermoelectric power factor of p-type thin films was not improved by EB irradiation. The different crystallization behavior of the n-type and p-type thin films is attributed to atomic rearrangement during EB irradiation. Selenium in the n-type thin films is more likely to undergo atomic rearrangement than the other atoms present, so only the crystallinity of the n-type Bi-Se-Te thin films was enhanced.

Takashiri, Masayuki, E-mail: takashiri@tokai-u.jp; Imai, Kazuo; Uyama, Masato; Nishi, Yoshitake [Department of Materials Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292 (Japan); Hagino, Harutoshi; Miyazaki, Koji [Department of Mechanical and Control Engineering, Kyushu Institute of Technology, 1-1 Sensui, Tobata-ku, Kitakyushu 804-8550 (Japan); Tanaka, Saburo [Department of Mechanical Engineering, College of Engineering, Nihon University, Nakagawara, Tokusada, Tamuramachi, Koriyama, Fukushima 963-8642 (Japan)

2014-06-07T23:59:59.000Z

386

Retrofitting the heating system for NASA's space shuttle engine test facility  

SciTech Connect (OSTI)

The John C. Stennis Space Center is one of nine NASA field installations and is the second largest NASA Center, occupying 13,480 acres (55 km{sup 2}) and surrounded by a 125,327-acre (507 km{sup 2}) unpopulated buffer zone. Since its beginnings, the center has been the prime NASA installation for static firing. This paper reports that because of the critical nature of the center's missions, precise instrumentation and comfortable personnel environments must be constantly and efficiency maintained. When the site was built nearly 30 years ago, two main boiler plants were installed. One was in the base area (which houses administrative and engineering offices) and the second was in the test area where the test stands and test support buildings are located. These two boiler plants generated high pressure, high temperature water (400{degrees} F, 400 psi; 204{degrees} C, 2,756 kPa) that was used for heating, reheating and absorption cooling. This high temperature hot water (HTHW) was circulated by pumps to various buildings on the site through an underground piping network. Once in the buildings, the HTHW passed through absorption chillers for cooling and high temperature-to-medium temperature water converters for heating and reheating.

Arceneaux, T.W. (NASA, St. Louis, MO (US))

1992-07-01T23:59:59.000Z

387

Thermoelectric applications as related to biomedical engineering for NASA Johnson Space Center  

SciTech Connect (OSTI)

This paper presents current NASA biomedical developments and applications using thermoelectrics. Discussion will include future technology enhancements that would be most beneficial to the application of thermoelectric technology. A great deal of thermoelectric applications have focused on electronic cooling. As with all technological developments within NASA, if the application cannot be related to the average consumer, the technology will not be mass-produced and widely available to the public (a key to research and development expenditures and thermoelectric companies). Included are discussions of thermoelectric applications to cool astronauts during launch and reentry. The earth-based applications, or spin-offs, include such innovations as tank and race car driver cooling, to cooling infants with high temperatures, as well as, the prevention of hair loss during chemotherapy. In order to preserve the scientific value of metabolic samples during long-term space missions, cooling is required to enable scientific studies. Results of one such study should provide a better understanding of osteoporosis and may lead to a possible cure for the disease. In the space environment, noise has to be kept to a minimum. In long-term space applications such as the International Space Station, thermoelectric technology provides the acoustic relief and the reliability for food, as well as, scientific refrigeration/freezers. Applications and future needs are discussed as NASA moves closer to a continued space presence in Mir, International Space Station, and Lunar-Mars Exploration.

Kramer, C.D.

1997-07-01T23:59:59.000Z

388

AGC-2 Irradiation Data Qualification Final Report  

SciTech Connect (OSTI)

The Graphite Technology Development Program will run a series of six experiments to quantify the effects of irradiation on nuclear grade graphite. The second Advanced Graphite Creep (AGC) experiment (AGC-2) began with Advanced Test Reactor (ATR) Cycle 149A on April 12, 2011, and ended with ATR Cycle 151B on May 5, 2012. The purpose of this report is to qualify AGC-2 irradiation monitoring data following INL Management and Control Procedure 2691, Data Qualification. Data that are Qualified meet the requirements for data collection and use as described in the experiment planning and quality assurance documents. Data that do not meet the requirements are Failed. Some data may not quite meet the requirements, but may still provide some useable information. These data are labeled as Trend. No Trend data were identified for the AGC-2 experiment. All thermocouples functioned throughout the AGC-2 experiment. There was one instance where spurious signals or instrument power interruption resulted in a recorded temperature value being well outside physical reality. This value was identified and labeled as Failed data. All other temperature data are Qualified. All helium and argon gas flow data are within expected ranges. Total gas flow was approximately 50 sccm through the capsule. Helium gas flow was briefly increased to 100 sccm during reactor shutdown. All gas flow data are Qualified. At the start of the experiment, moisture in the outflow gas line increased to 200 ppmv then declined to less than 10 ppmv over a period of 5 days. This increase in moisture coincides with the initial heating of the experiment and drying of the system. Moisture slightly exceeded 10 ppmv three other times during the experiment. While these moisture values exceed the 10 ppmv threshold value, the reported measurements are considered accurate and to reflect moisture conditions in the capsule. All moisture data are Qualified. Graphite creep specimens are subjected to one of three loads, 393 lbf, 491 lbf, or 589 lbf. Loads were consistently within 5% of the specified values throughout the experiment. Stack displacement increased consistently throughout the experiment with total displacement ranging from 1 to 1.5 inches. No anomalous values were identified. During reactor outages, a set of pneumatic rams are used to raise the stacks of graphite creep specimens to ensure the specimens have not become stuck within the test train. This stack raising was performed after all cycles when the capsule was in the reactor. All stacks were raised successfully after each cycle. The load and displacement data are Qualified

Laurence C. Hull

2012-07-01T23:59:59.000Z

389

Surface cleanliness measurement procedure  

DOE Patents [OSTI]

A procedure and tools for quantifying surface cleanliness are described. Cleanliness of a target surface is quantified by wiping a prescribed area of the surface with a flexible, bright white cloth swatch, preferably mounted on a special tool. The cloth picks up a substantial amount of any particulate surface contamination. The amount of contamination is determined by measuring the reflectivity loss of the cloth before and after wiping on the contaminated system and comparing that loss to a previous calibration with similar contamination. In the alternative, a visual comparison of the contaminated cloth to a contamination key provides an indication of the surface cleanliness.

Schroder, Mark Stewart (Hendersonville, NC); Woodmansee, Donald Ernest (Simpsonville, SC); Beadie, Douglas Frank (Greenville, SC)

2002-01-01T23:59:59.000Z

390

Surface species produced in the radiolysis of zirconia nanoparticles  

SciTech Connect (OSTI)

Modifications to water-zirconia nanoparticle interfaces induced by {gamma} irradiation have been examined using diffuse reflection infrared Fourier transform (DRIFT), Raman scattering, and electron paramagnetic resonance (EPR) techniques. Spectroscopy with in situ heating was used to probe variations in the dissociatively bound chemisorbed water on the zirconia nanoparticles following evaporation of the physisorbed water. DRIFT spectra show that the bridged Zr-OH-Zr species decreases relative to the terminal Zr-OH species upon irradiation. No variation is observed with Raman scattering, indicating that the zirconia morphology is unchanged. EPR measurements suggest the possible formation of the superoxide ion, presumably by modification of the surface OH groups. Trapped electrons and interstitial H atoms are also observed by EPR.

Carrasco-Flores, Eduardo A.; LaVerne, Jay A. [Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556 (United States); Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556 (United States) and Department of Physics, University of Notre Dame, Notre Dame, Indiana, 46556 (United States)

2007-12-21T23:59:59.000Z

391

The modelling of irradiation-enhanced phosphorus segregation in neutron irradiated reactor pressure vessel submerged-arc welds  

SciTech Connect (OSTI)

Recent results on neutron-irradiated RPV submerged-arc welds have revealed grain boundary segregation of phosphorus during irradiation, which may lead to intergranular fracture. However, the experimental database is insufficient to define the dependence of the process on variables such ad dose, dose-rate and temperature. This paper describes work in which two existing models of phosphorus segregation, under thermal or irradiation conditions, have been developed to obtain predictions of these dependencies. The critical parameters in the models have been adjusted to give consistency with the available reference data, and predictions have been made of the dependence of segregation on a number of variables.

Druce, S.G.; English, C.A.; Foreman, A.J.E.; McElroy, R.J.; Vatter, I.A. [AEA Technology, Didcot (United Kingdom). Harwell Lab.; Bolton, C.J.; Buswell, J.T.; Jones, R.B. [Nuclear Electric, Berkeley (United Kingdom). Berkeley Technology Centre

1996-12-31T23:59:59.000Z

392

Solar irradiance forecasting at multiple time horizons and novel methods to evaluate uncertainty  

E-Print Network [OSTI]

Solar irradiance data . . . . . . . . . . . . .Accuracy . . . . . . . . . . . . . . . . . Solar Resourcev Uncertainty In Solar Resource: Forecasting

Marquez, Ricardo

2012-01-01T23:59:59.000Z

393

K.K. Gan ATLAS Tracker Upgrade Workshop 1 Irradiation Results and Transmission on  

E-Print Network [OSTI]

Power vs Dosage all VCSELs still produce optical power at SLHC dosage should irradiate at lower Workshop 14 Post-Irradiation Analysis all arrays except ULM 5 G still produce optical power post-irradiationK.K. Gan ATLAS Tracker Upgrade Workshop 1 Irradiation Results and Transmission on Small Cables

Gan, K. K.

394

GR via Characteristic Surfaces  

E-Print Network [OSTI]

We reformulate the Einstein equations as equations for families of surfaces on a four-manifold. These surfaces eventually become characteristic surfaces for an Einstein metric (with or without sources). In particular they are formulated in terms of two functions on R4xS2, i.e. the sphere bundle over space-time, - one of the functions playing the role of a conformal factor for a family of associated conformal metrics, the other function describing an S2's worth of surfaces at each space-time point. It is from these families of surfaces themselves that the conformal metric - conformal to an Einstein metric - is constructed; the conformal factor turns them into Einstein metrics. The surfaces are null surfaces with respect to this metric.

Simonetta Frittelli; Carlos Kozameh; Ted Newman

1995-02-11T23:59:59.000Z

395

agr-1 irradiation experiment: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

E. Schwartz Department Direct-normal solar irradiance (DNSI), the total energy in the solar spectrum incident in unit time Schwartz, Stephen E. 13 An Experiment at HiRadMat:...

396

Review of Dynamic Recovery Effects on Ion Irradiation Damage...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6HSiC, ionization processes are less dominant. Citation: Weber WJ, Y Zhang, and LM Wang.2012."Review of Dynamic Recovery Effects on Ion Irradiation Damage in...

397

Materials for cold neutron sources: Cryogenic and irradiation effects  

SciTech Connect (OSTI)

Materials for the construction of cold neutron sources must satisfy a range of demands. The cryogenic temperature and irradiation create a severe environment. Candidate materials are identified and existing cold sources are briefly surveyed to determine which materials may be used. Aluminum- and magnesium-based alloys are the preferred materials. Existing data for the effects of cryogenic temperature and near-ambient irradiation on the mechanical properties of these alloys are briefly reviewed, and the very limited information on the effects of cryogenic irradiation are outlined. Generating mechanical property data under cold source operating conditions is a daunting prospect. It is clear that the cold source material will be degraded by neutron irradiation, and so the cold source must be designed as a brittle vessel. The continued effective operation of many different cold sources at a number of reactors makes it clear that this can be accomplished. 46 refs., 8 figs., 2 tab.

Alexander, D.J.

1990-01-01T23:59:59.000Z

398

Irradiation facilities at the Los Alamos Meson Physics Facility  

SciTech Connect (OSTI)

The irradiation facilities for testing SSC components and detector systems are described. Very high intensity proton, neutron, and pion fluxes are available with beam kinetic energies of up to 800 MeV. 4 refs., 12 figs., 2 tabs.

Sandberg, V.

1990-01-01T23:59:59.000Z

399

Sandis irradiator for dried sewage solids. Final safety analysis report  

SciTech Connect (OSTI)

Analyses of the hazards associated with the operation of the Sandia irradiator for dried sewage solids, as well as methods and design considerations to minimize these hazards, are presented in accordance with DOE directives.

Morris, M.

1980-07-01T23:59:59.000Z

400

Microstructural and Mechanical Property Changes in Ion Irradiated Tunsgten  

E-Print Network [OSTI]

on the sustainability of tungsten as a plasma facing material (PFM). During operation, PFM must withstand harsh conditions with combined effects from high temperature, mechanical stress, irradiation, transmutation, and the production of hydrogen (H) and helium (He...

General, Michael

2013-04-08T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Post-irradiation Examination and Fission Product Inventory Analysis of AGR-1 Irradiation Capsules  

SciTech Connect (OSTI)

The AGR-1 experiment was the first in a series of Advanced Gas Reactor (AGR) experiments designed to test TRISO fuel under High Temperature Gas Reactor irradiation conditions. This experiment was irradiated in the Advanced Test Reactor (ATR) at Idaho National Laboratory (INL) and is currently undergoing post-irradiation examination (PIE) at INLs Materials and Fuels Complex (MFC). The inventory and distribution of fission products, especially Ag-110m, was assessed and analyzed for all the components of the AGR-1 capsules. This data should help inform the study of fission product migration in coated particle fuel. Gamma spectrometry was used to measure the activity of various different fission products in the different components of the AGR-1 test train. Each capsule contained: 12 fuel compacts, a graphite holder that kept the fuel compacts in place, graphite spacers that were above and below the graphite holders and fuel compacts, gas lines through which a helium neon gas mixture flowed in and out of each capsule, and the stainless steel shell that contained the experiment. Gamma spectrometry results and the experimental techniques used to capture these results will be presented for all the capsule components. The components were assayed to determine the total activity of different fission products present in or on them. These totals are compared to the total expected activity of a particular fission product in the capsule based on predictions from physics simulation. Based on this metric, a significant fraction of the Ag-110m was detected outside the fuel compacts, but the amount varied highly between the 6 capsules. Very small fractions of Cs-137 (<2E-5), Cs-134 (<1e-5), and Eu-154 (<4e-4) were detected outside of the fuel compacts. Additionally, the distribution of select fission products in some of the components including the fuel compacts and the graphite holders were measured and will be discussed.

J M Harp; P D Demkowicz; S A Ploger

2012-10-01T23:59:59.000Z

402

Five blind men and the elephant: what can the NASA Aura ozone measurements tell us about stratosphere-troposphere exchange?  

E-Print Network [OSTI]

Five blind men and the elephant: what can the NASA Auraof the five blind men and the elephant, where the five Auramen who are touching the elephant (ozone) in dif- ferent

Tang, Q.; Prather, M. J

2012-01-01T23:59:59.000Z

403

Proceedings of the NASA/MIT Workshop on Airline Systems Analysis, Waterville Valley, New Hampshire, July 10-21, 1972  

E-Print Network [OSTI]

Introduction: The recent renaming of the NASA Office of Advanced Research band Technology as the Office of Aeronautics and Space Technology emphasizes the new stress being placed on aeronautical research by the Federal ...

Vittek, Joseph F.

1972-01-01T23:59:59.000Z

404

A Search for Additional Planets in Five of the Exoplanetary Systems Studied by the Nasa Epoxi Mission  

E-Print Network [OSTI]

We present time series photometry and constraints on additional planets in five of the exoplanetary systems studied by the EPOCh (Extrasolar Planet Observation and Characterization) component of the NASA EPOXI mission: ...

Ballard, Sarah

405

Summary and recommendations for the NASA/MIT Workshop on Short Haul Air Transport, Waterville Valley, New Hampshire, August 1971  

E-Print Network [OSTI]

Executive summary: A review is given of the material covered by the MIT/NASA Waterville Valley workshop which dealt with the institutional, socio-economic, operational, and technological problems associated with introducing ...

Simpson, R. W.

1968-01-01T23:59:59.000Z

406

A.24 ENHANCING THE CAPABILITY OF COMPUTATIONAL EARTH SYSTEM MODELS AND NASA DATA FOR OPERATION AND ASSESSMENT  

E-Print Network [OSTI]

A.24-1 A.24 ENHANCING THE CAPABILITY OF COMPUTATIONAL EARTH SYSTEM MODELS AND NASA DATA) computational support of Earth system modeling. #12;A.24-2 2.1 Acceleration of Operational Use of Research Data

407

Thermal transport in CO2 laser irradiated fused silica: in situ measurements and analysis  

SciTech Connect (OSTI)

In situ spatial and temporal temperature measurements of pristine fused silica surfaces heated with a 10.6 {micro}m CO{sub 2} laser were obtained using an infrared radiation thermometer based on a Mercury Cadmium Telluride (MCT) camera. Laser spot sizes ranged from 250 {micro}m to 1000 {micro}m diameter with peak axial irradiance levels of 0.13 to 16 kW/cm{sup 2}. For temperatures below 2800K, the measured steady-state surface temperature is observed to rise linearly with both increasing beam size and incident laser irradiance. The effective thermal conductivity estimated over this range was approximately 2W/mK, in good agreement with classical calculations based on phonon heat capacities. Similarly, time-dependent temperature measurements up to 2000K yielded thermal diffusivity values which were close to reported values of 7 x 10{sup -7} m{sup 2}/s. Above {approx}2800K, the fused silica surface temperature asymptotically approaches 3100K as laser power is further increased, consistent with the onset of evaporative heat losses near the silica boiling point. These results show that in the laser heating regime studied here, the T{sup 3} temperature dependent thermal conductivity due to radiation transport can be neglected, but at temperatures above 2800K heat transport due to evaporation must be considered. The thermal transport in fused silica up to 2800K, over a range of conditions, can then be adequately described by a linear diffusive heat equation assuming constant thermal properties.

Yang, S T; Matthews, M J; Elhadj, S; Draggoo, V G; Bisson, S E

2009-07-07T23:59:59.000Z

408

Irradiation Assisted Grain Boundary Segregation in Steels  

SciTech Connect (OSTI)

The understanding of radiation-induced grain boundary segregation (RIS) has considerably improved over the past decade. New models have been introduced and much effort has been devoted to obtaining comprehensive information on segregation from the literature. Analytical techniques have also improved so that chemical analysis of layers 1 nm thick is almost routine. This invited paper will review the major methods used currently for RIS prediction: namely, Rate Theory, Inverse Kirkendall, and Solute Drag approaches. A summary is made of the available data on phosphorus RIS in reactor pressure vessel (RPV) steels. This will be discussed in the light of the predictions of the various models in an effort to show which models are the most reliable and easy to use for forecasting P segregation behaviour in steels. A consequence of RIS in RPV steels is a radiation induced shift in the ductile to brittle transition temperature (DBTT). It will be shown how it is possible to relate radiation-induced P segregation levels to DBTT shift. Examples of this exercise will be given for RPV steels and for ferritic steels being considered for first wall fusion applications. Cr RIS in high alloy stainless steels and associated irradiation-assisted stress corrosion cracking (IASCC) will be briefly discussed. (authors)

Lu, Zheng; Faulkner, Roy G. [IPTME, Loughborough University, Loughborough, Leics (United Kingdom)

2008-07-01T23:59:59.000Z

409

Recovery of germanium-68 from irradiated targets  

DOE Patents [OSTI]

A process for selective separation of germanium-68 from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, contacting the first ion-containing solution with a cationic resin whereby ions selected from the group consisting of molybdenum, niobium, technetium, selenium, vanadium, arsenic, germanium, zirconium and rubidium remain in a second ion-containing solution while ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, strontium, yttrium and zirconium are selectively adsorbed by the first resin, adjusting the pH of the second ion-containing solution to within a range of from about 0.7 to about 3.0, adjusting the soluble metal halide concentration in the second ion-containing solution to a level adapted for subsequent separation of germanium, contacting the pH-adjusted, soluble metal halide-containing second ion-containing solution with a dextran-based material whereby germanium ions are separated by the dextran-based material, and recovering the germanium from the dextran-based material, preferably by distillation.

Phillips, Dennis R. (Los Alamos, NM); Jamriska, Sr., David J. (Los Alamos, NM); Hamilton, Virginia T. (Los Alamos, NM)

1993-01-01T23:59:59.000Z

410

Ion irradiation induced effects in polyamidoimide  

SciTech Connect (OSTI)

The interaction between ion beam and polyamidoimide (PAI) is studied by means of low-temperature infrared spectroscopy. 200 keV Ar{sup +} and 250 keV He{sup +} beams with fluences ranging from 10{sup 13} ions cm{sup {minus}2} to 5{times}10{sup 16} ions cm{sup {minus}2} are found to induce atomic bond breaks leading to absorption bands at 2344, 2261, and 2125 cm{sup {minus}1} corresponding respectively to CO{sub 2}, C=N=N and C=N--R vibrations. Shrinkage of the polymer along with a drastic decrease of the resistivity during Ar{sup +} and He{sup +} irradiation are observed. Speculations on the respective role of electronic processes and atomic collisions in the evolution of the polymer are made. No evidence of PAI modification through knock-on mechanism for fluences lower than 5{times}10{sup 15} ions cm{sup {minus}2} is noticed. In fact, our results would suggest a predominant role of the electronic processes for the low fluences (up to 5{times}10{sup 15} ions cm{sup {minus}2} ), whereas a degradation mechanism based on atomic collisions is more likely to take place for higher fluences. A theoretical mechanism of reactions based upon our Fourier transform infrared (FTIR) and secondary ion mass spectroscopies (SIMS) results, describing the chemical changes occurring in the PAI, is presented and briefly discussed.

Merhari, L.; Belorgeot, C.; Moliton, J.P. (Laboratoire d'Electronique des Polymeres sous Faisceaux Ioniques 123, avenue Albert Thomas, 87060 Limoges Cedex (France))

1991-09-01T23:59:59.000Z

411

Use of laser extensometer for mechanical test on irradiated materials  

SciTech Connect (OSTI)

Techniques have been developed by EDF`s hot laboratory in Chinon for performing mechanical tests on irradiated materials. Some of these techniques aim to facilitate strain measurements, which are particularly difficult to perform on irradiated specimens at high temperatures or on subsize specimens. Recent progress has been driven by laser technology combined with software development. The use of this technique, which allows strain measurements without contact on the specimen, is described for tensile (especially on subsize specimens), fatigue and creep tests.

Brillaud, C.; Meylogan, T.; Salathe, P. [Electricite de France, Avoine (France)

1996-12-31T23:59:59.000Z

412

USE OF SILICON CARBIDE MONITORS IN ATR IRRADIATION TESTING  

SciTech Connect (OSTI)

In April 2007, the Department of Energy (DOE) designated the Advanced Test Reactor (ATR) a National Scientific User Facility (NSUF) to advance US leadership in nuclear science and technology. By attracting new users from universities, laboratories, and industry, the ATR will support basic and applied nuclear research and development and help address the nation's energy security needs. In support of this new program, the Idaho National Laboratory (INL) has developed in-house capabilities to fabricate, test, and qualify new and enhanced temperature sensors for irradiation testing. Although most efforts emphasize sensors capable of providing real-time data, selected tasks have been completed to enhance sensors provided in irradiation locations where instrumentation leads cannot be included, such as drop-in capsule and Hydraulic Shuttle Irradiation System (HSIS) or 'rabbit' locations. For example, silicon carbide (SiC) monitors are now available to detect peak irradiation temperatures between 200C and 800C. Using a resistance measurement approach, specialized equipment installed at INL's High Temperature Test Laboratory (HTTL) and specialized procedures were developed to ensure that accurate peak irradiation temperature measurements are inferred from SiC monitors irradiated at the ATR. Comparison examinations were completed by INL to demonstrate this capability, and several programs currently rely on SiC monitors for peak temperature detection. This paper discusses the use of SiC monitors at the ATR, the process used to evaluate them at the HTTL, and presents representative measurements taken using SiC monitors.

K. L. Davis; B. Chase; T. Unruh; D. Knudson; J. L. Rempe

2012-07-01T23:59:59.000Z

413

Tag: NASA  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5all en Fuels for the final frontier http:www.y12.doe.govnewspress-releasesfuels-final-frontier

414

ARM Climate Research Facility Spectral Surface Albedo Value-Added Product (VAP) Report  

SciTech Connect (OSTI)

This document describes the input requirements, output data products, and methodology for the Spectral Surface Albedo (SURFSPECALB) value-added product (VAP). The SURFSPECALB VAP produces a best-estimate near-continuous high spectral resolution albedo data product using measurements from multifilter radiometers (MFRs). The VAP first identifies best estimates for the MFR downwelling and upwelling shortwave irradiance values, and then calculates narrowband spectral albedo from these best-estimate irradiance values. The methodology for finding the best-estimate values is based on a simple process of screening suspect data and backfilling screened and missing data with estimated values when possible. The resulting best-estimate MFR narrowband spectral albedos are used to determine a daily surface type (snow, 100% vegetation, partial vegetation, or 0% vegetation). For non-snow surfaces, a piecewise continuous function is used to estimate a high spectral resolution albedo at 1 min temporal and 10 cm-1 spectral resolution.

McFarlane, S; Gaustad, K; Long, C; Mlawer, E

2011-07-15T23:59:59.000Z

415

Comparison of /sup 32/P therapy and sequential hemibody irradiation (HBI) for bony metastases as methods of whole body irradiation  

SciTech Connect (OSTI)

We report a retrospective study of 15 patients with prostate carcinoma and diffuse bone metastases treated with sodium /sup 32/P for palliation of pain at Downstate Medical Center and Kings County Hospital from 1973 to 1978. The response rates, duration of response, and toxicities are compared with those of other series of patients treated with /sup 32/P and with sequential hemibody irradiation. The response rates and duration of response are similar with both modalities ranging from 58 to 95% with a duration of 3.3 to 6 months with /sup 32/P and from 75 to 86% with a median duration of 5.5 months with hemibody irradiation. There are significant differences in the patterns of response and in the toxicities of the two treatment methods. Both methods cause significant bone marrow depression. Acute radiation syndrome, radiation pneumonitis, and alopecia are seen with sequential hemibody irradiation and not with /sup 32/P, but their incidence can be reduced by careful treatment planning. Hemibody irradiation can provide pain relief within 24 to 48 h, while /sup 32/P may produce an initial exacerbation of pain. Lower hemibody irradiation alone is less toxic than either upper hemibody irradiation or /sup 32/P treatment.

Aziz, H.; Choi, K.; Sohn, C.; Yaes, R.; Rotman, M.

1986-06-01T23:59:59.000Z

416

EMSL - surface chemistry  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

surface-chemistry en FeSSZ-13 as an NH3-SCR Catalyst: A Reaction Kinetics and FTIRMssbauer Spectroscopic Study. http:www.emsl.pnl.govemslwebpublications...

417

LEEM investigations of clean surfaces driven by energetic ion beams  

SciTech Connect (OSTI)

The original purpose of this award was to use low?energy electron microscopy (LEEM) to explore the dynamics of surfaces of clean single crystal surfaces when driven by a beam of energetic ions. The goal was to understand the nanoscience of hyperthermal growth, surface erosion by sublimation and irradiation, operation of surface sinks in irradiated materials, diffusion on driven surfaces, and the creation of structural patterns. This project was based on a novel LEEM system constructed by C. P. Flynn, which provided real?time imaging of surface dynamics by scattering low energy electrons. With the passing of Prof. Flynn in late 2011, this project was completed under a slightly different scope by constructing a low?energy, inelastic electron scattering (?EELS?) instrument. Consistent with Flynn?s original objectives for his LEEM system, this device probes the dynamics of crystal surfaces. However the measurements are not carried out in real time, but instead are done in the frequency domain, through the energy lost from the probe electrons. The purpose of this device is to study the collective bosonic excitations in a variety of materials, including high temperature superconductors, topological insulators, carbon allotropes including (but not limited to) graphene, etc. The ultimate goal here is to identify the bosons that mediate interactions in these and other materials, with hopes of shedding light on the origin of many exotic phenomena including high temperature superconductivity. We completed the construction of a low?energy EELS system that operates with an electron kinetic energy of 7 - 10 eV. With this instrument now running, we hope to identify, among other things, the bosons that mediate pairing in high temperature superconductors. Using this instrument, we have already made our first discovery. Studying freshly cleaved single crystals of Bi{sub 2}Se{sub 3}, which is a topological insulator, we have observed a surface excitation at an energy loss of ~ 90 meV. This excitation disperses quadratically, exhibits a critical momentum of q{sub c} = 0.11 ?{sup ?1}, and may be identified as the surface collective mode of the helical Dirac liquid. To make a stronger connection between the behavior of this excitation and the known surface physics of Bi{sub 2}Se{sub 3}, we are carrying out a doping?dependent study, as a function of Se vacancy content, of this excitation. From this study we will be able to quantify the strength of interactions in the spin?polarized surface states in a manner analogous to our past work on graphene.

Abbamonte, Peter M. [University of Illinois] University of Illinois

2013-04-24T23:59:59.000Z

418

Apparatus and method to control atmospheric water vapor composition and concentration during dynamic cooling of biological tissues in conjunction with laser irradiations  

DOE Patents [OSTI]

Cryogen spray cooling of skin surface with millisecond cryogen spurts is an effective method for establishing a controlled temperature distribution in tissue and protecting the epidermis from nonspecific thermal injury during laser mediated dermatological procedures. Control of humidity level, spraying distance and cryogen boiling point is material to the resulting surface temperature. Decreasing the ambient humidity level results in less ice formation on the skin surface without altering the surface temperature during the cryogen spurt. For a particular delivery nozzle, increasing the spraying distance to 85 millimeters lowers the surface temperature. The methodology comprises establishing a controlled humidity level in the theater of operation of the irradiation site of the biological tissues before and/or during the cryogenic spray cooling of the biological tissue. At cold temperatures calibration was achieved by mounting a thermistor on a thermoelectric cooler. The thermal electric cooler was cooled from from 20.degree. C. to about -20.degree. C. while measuring its infrared emission.

Nelson, J. Stuart (Laguna Niguel, CA); Anvari, Bahman (Houston, TX); Tanenbaum, B. Samuel (Irvine, CA); Milner, Thomas E. (Austin, TX)

1999-01-01T23:59:59.000Z

419

NASA Boeing 757 HIRF test series low power on-the-ground tests  

SciTech Connect (OSTI)

The data acquisition phase of a program intended to provide data for the validation of computational, analytical, and experimental techniques for the assessment of electromagnetic effects in commercial transports; for the checkout of instrumentation for following test programs; and for the support of protection engineering of airborne systems has been completed. Funded by the NASA Fly-By-Light/ Power-By-Wire Program, the initial phase involved on-the-ground electromagnetic measurements using the NASA Boeing 757 and was executed in the LESLI Facility at the USAF Phillips Laboratory. The major participants in this project were LLNL, NASA Langley Research Center, Phillips Laboratory, and UIE, Inc. The tests were performed over a five week period during September through November, 1994. Measurements were made of the fields coupled into the aircraft interior and signals induced in select structures and equipment under controlled illumination by RF fields. A characterization of the ground was also performed to permit ground effects to be included in forthcoming validation exercises. This report and the associated test plan that is included as an appendix represent a definition of the overall on-the-ground test program. They include descriptions of the test rationale, test layout, and samples of the data. In this report, a detailed description of each executed test is provided, as is the data identification (data id) relating the specific test with its relevant data files. Samples of some inferences from the data that will be useful in protection engineering and EM effects mitigation are also presented. The test plan which guided the execution of the tests, a test report by UIE Inc., and the report describing the concrete pad characterization are included as appendices.

Poggio, A.J.; Pennock, S.T.; Zacharias, R.A.; Avalle, C.A.; Carney, H.L. [National Aeronautics and Space Administration, Langley AFB, VA (United States). Langley Research Center] [National Aeronautics and Space Administration, Langley AFB, VA (United States). Langley Research Center

1996-08-01T23:59:59.000Z

420

Femtosecond laser-induced asymmetric large scale waves on gold surfaces  

SciTech Connect (OSTI)

With femtosecond (fs) pulse irradiation, we investigate the morphological evolution of a unique type of fs laser-induced periodic surface structure, called nanostructure-covered large scale waves (NC-LSWs), covered by iterating stripe patterns of nanostructures and microstructures with a period of tens of microns. By monitoring the morphological profile of NC-LSWs following fs laser heating of Au, we show that the NC-LSWs are highly asymmetrically formed and propagate on a gold surface. We believe that the selective laser ablation of Au surface and the subsequent mass transfer of liquid Au following nonuniform energy deposition result in the asymmetric NC-LSW propagation on metals.

Yong Hwang, Taek; Guo, Chunlei [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

2012-07-09T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

Femtosecond diffraction dynamics of laser-induced periodic surface structures on fused silica  

SciTech Connect (OSTI)

The formation of laser-induced periodic surface structures (LIPSS) on fused silica upon irradiation with linearly polarized fs-laser pulses (50 fs pulse duration, 800 nm center wavelength) is studied experimentally using a transillumination femtosecond time-resolved (0.1 ps-1 ns) pump-probe diffraction approach. This allows to reveal the generation dynamics of near-wavelength-sized LIPSS showing a transient diffraction at specific spatial frequencies even before a corresponding permanent surface relief was observed. The results confirm that the ultrafast energy deposition to the materials surface plays a key role and triggers subsequent physical mechanisms such as carrier scattering into self-trapped excitons.

Hoehm, S.; Rosenfeld, A. [Max-Born-Institut fuer Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Max-Born-Strasse 2A, D-12489 Berlin (Germany)] [Max-Born-Institut fuer Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Max-Born-Strasse 2A, D-12489 Berlin (Germany); Krueger, J.; Bonse, J. [BAM Bundesanstalt fuer Materialforschung und - pruefung, Unter den Eichen 87, D-12205 Berlin (Germany)] [BAM Bundesanstalt fuer Materialforschung und - pruefung, Unter den Eichen 87, D-12205 Berlin (Germany)

2013-02-04T23:59:59.000Z

422

Bulk and surface laser damage of silica by picosecond and nanosecond pulses at 1064 nm  

SciTech Connect (OSTI)

We measured bulk and surface dielectric breakdown thresholds of pure silica for 14 ps and 8 ns pulses of 1064 nm light. The thresholds are sharp and reproducible. For the 8 ns pulses the bulk threshold irradiance is 4.75 {+-} 0.25 kW/{mu}m{sup 2}. The threshold is approximately three times higher for 14 ps pulses. For 8 ns pulses the input surface damage threshold can be made equal to the bulk threshold by applying an alumina or silica surface polish.

Smith, Arlee V.; Do, Binh T

2008-09-10T23:59:59.000Z

423

AVTA Federal Fleet PEV Readiness Data Logging and Characterization Study for NASA White Sands Test Facility  

SciTech Connect (OSTI)

This report focuses on the NASA White Sands Test Facility (WSTF) fleet to identify daily operational characteristics of select vehicles and report findings on vehicle and mission characterizations to support the successful introduction of plug-in electric vehicles (PEVs) into the agencies fleets. Individual observations of these selected vehicles provide the basis for recommendations related to electric vehicle adoption and whether a battery electric vehicle (BEV) or plug-in hybrid electric vehicle (PHEV) (collectively plug-in electric vehicles, or PEVs) can fulfill the mission requirements.

Stephen Schey; Jim Francfort

2014-10-01T23:59:59.000Z

424

NASA and DOE Collaborate on Dark Energy Research | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |EnergyonSupport0.pdf5 OPAM SEMIANNUAL REPORTMAMayCrossColoradoMotionMunicipalCodesLater:NASA

425

NASA's Composite Portfolio: Department of Energy Workshop Fiber Reinforced Polymer Composites Manufacturing  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergy HealthCommentsAugust 2012 MonthlyYear ScheduleCodes @NASA Enhanced

426

New Horizons Science Photos from NASA's Pluto-Kuiper Belt Mission  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

DOE provided the power supply for NASA's New Horizons Mission, a mission to the Pluto and Charon, a double-planet system, and the Kuiper Belt. There are 61 science photos posted on the New Horizons website, along with mission photos, spacecraft images, launch photos, posters and renderings that are both scientific and artistic. Dates range from June of 2006 to February of 2008. The images can be searched by keywords, by date, or by subject topic. They can also be browsed as an entire list. Each image has a detailed description.

427

Concrete Pavement Surface Characteristics  

E-Print Network [OSTI]

, Broom, Belt, Carpet) Shot Peened Exposed Aggregate Porous (Pervious) Concrete Milled HMA and SurfaceImproving Concrete Pavement Surface Characteristics Pooled Fund TPF-5(139) National Concrete do with this knowledge? #12;Better Design and Construction Practices for Texturing Concrete Pavement

428

Geiger M., Diabat L., Mnard L., Wald L., 2002. A web service for controlling the quality of measurements of global solar irradiation. Solar Energy, Vol. 73, No 6, pp. 475-480  

E-Print Network [OSTI]

sensitive sensors measure the downward solar radiation flux on a horizontal surface during a given time of measurements of global solar irradiation. Solar Energy, Vol. 73, No 6, pp. 475-480 Copyright Ecole des Mines de Paris -Armines - UFAE 1 A WEB SERVICE FOR CONTROLLING THE QUALITY OF MEASUREMENTS OF GLOBAL SOLAR

Paris-Sud XI, Université de

429

AGR-2 IRRADIATION TEST FINAL AS-RUN REPORT  

SciTech Connect (OSTI)

This document presents the as-run analysis of the AGR-2 irradiation experiment. AGR-2 is the second of the planned irradiations for the Advanced Gas Reactor (AGR) Fuel Development and Qualification Program. Funding for this program is provided by the U.S. Department of Energy as part of the Very High Temperature Reactor (VHTR) Technical Development Office (TDO) program. The objectives of the AGR-2 experiment are to: (a) Irradiate UCO (uranium oxycarbide) and UO2 (uranium dioxide) fuel produced in a large coater. Fuel attributes are based on results obtained from the AGR-1 test and other project activities. (b) Provide irradiated fuel samples for post-irradiation experiment (PIE) and safety testing. (c) Support the development of an understanding of the relationship between fuel fabrication processes, fuel product properties, and irradiation performance. The primary objective of the test was to irradiate both UCO and UO2 TRISO (tri-structural isotropic) fuel produced from prototypic scale equipment to obtain normal operation and accident condition fuel performance data. The UCO compacts were subjected to a range of burnups and temperatures typical of anticipated prismatic reactor service conditions in three capsules. The test train also includes compacts containing UO2 particles produced independently by the United States, South Africa, and France in three separate capsules. The range of burnups and temperatures in these capsules were typical of anticipated pebble bed reactor service conditions. The results discussed in this report pertain only to U.S. produced fuel. In order to achieve the test objectives, the AGR-2 experiment was irradiated in the B-12 position of the Advanced Test Reactor (ATR) at Idaho National Laboratory (INL) for a total irradiation duration of 559.2 effective full power days (EFPD). Irradiation began on June 22, 2010, and ended on October 16, 2013, spanning 12 ATR power cycles and approximately three and a half calendar years. The test contained six independently controlled and monitored capsules. Each U.S. capsule contained 12 compacts of either UCO or UO2 AGR coated fuel. No fuel particles failed during the AGR-2 irradiation. Final burnup values on a per compact basis ranged from 7.26 to 13.15% FIMA (fissions per initial heavy-metal atom) for UCO fuel, and 9.01 to 10.69% FIMA for UO2 fuel, while fast fluence values ranged from 1.94 to 3.471025 n/m2 (E >0.18 MeV) for UCO fuel, and from 3.05 to 3.531025 n/m2 (E >0.18 MeV) for UO2 fuel. Time-average volume-average (TAVA) temperatures on a capsule basis at the end of irradiation ranged from 987C in Capsule 6 to 1296C in Capsule 2 for UCO, and from 996 to 1062C in UO2-fueled Capsule 3. By the end of the irradiation, all of the installed thermocouples (TCs) had failed. Fission product release-to-birth (R/B) ratios were quite low. In the UCO capsules, R/B values during the first three cycles were below 10-6 with the exception of the hotter Capsule 2, in which the R/Bs reached 210-6. In the UO2 capsule (Capsule 3), the R/B values during the first three cycles were below 10-7. R/B values for all following cycles are not reliable due to gas flow and cross talk issues.

Blaise, Collin

2014-07-01T23:59:59.000Z

430

Effect of irradiation on bone remodelling and the structural integrity of the vertebral column. Doctoral thesis  

SciTech Connect (OSTI)

The effects of therapeutic levels of radiation on the axial properties of the primate vertebral column were studied. Seven male rhesus monkeys (Macaca mulatta) were irradiated with a single does of 1300 cGy to the specific lumbar vertebrae of L2, L3, and L4. Three additional animals served as controls. Radiographs were taken before the radiation treatment and just prior to sacrifice to determine density changes in the bone. The animal subjects were sacrificed 105 days following the radiation exposure. Biomechanical testing was completed on lumbar levels 2 and 3 to identify changes in strength characteristics following radiation treatment. Histomorphometric analysis of lumbar vertebrae level 4 was completed to identify volume and surface density changes as well as cellular changes. Tetracycline, dicarbomethylaminomethyl fluorescein (DCAF), and xylenol orange were used as bone labeling agents to aid in the histomorphometry and to obtain dynamic parameter changes.

Swenson, K.N.

1990-01-01T23:59:59.000Z

431

Nanoscale density fluctuations in swift heavy ion irradiated amorphous SiO{sub 2}  

SciTech Connect (OSTI)

We report on the observation of nanoscale density fluctuations in 2 {mu}m thick amorphous SiO{sub 2} layers irradiated with 185 MeV Au ions. At high fluences, in excess of approximately 5 x 10{sup 12} ions/cm{sup 2}, where the surface is completely covered by ion tracks, synchrotron small angle x-ray scattering measurements reveal the existence of a steady state of density fluctuations. In agreement with molecular dynamics simulations, this steady state is consistent with an ion track ''annihilation'' process, where high-density regions generated in the periphery of new tracks fill in low-density regions located at the center of existing tracks.

Kluth, P.; Giulian, R.; Ridgway, M. C. [Department of Electronic Materials Engineering, Australian National University, Canberra ACT 0200 (Australia); Pakarinen, O. H.; Djurabekova, F.; Nordlund, K. [Department of Physics and Helsinki Institute of Physics, University of Helsinki, Helsinki (Finland); Byrne, A. P. [Department of Nuclear Physics, Australian National University, Canberra ACT 0200 (Australia)

2011-12-15T23:59:59.000Z

432

Synthesis of nanosize BPO{sub 4} under microwave irradiation  

SciTech Connect (OSTI)

Highlights: ? Nanosize BPO{sub 4} are prepared under microwave-irradiation conditions. ? This reaction is only performed at less than 640 W power for 2.55 min. ? The particles of sample irradiated at 400 W are 4090 nm in size and well dispersed. ? A simple, fast and green procedure for synthesis of nanosize BPO{sub 4} is developed. -- Abstract: Nanosize BPO{sub 4} was synthesized using H{sub 3}BO{sub 3} and H{sub 3}PO{sub 4} (85%) as raw materials under microwave irradiation. This reaction was performed at powers lower than 640 W and irradiation time ranging from 2.5 min to 5 min, which were only a fraction of the time required for conventional synthetic procedures. The structure of the as-prepared BPO{sub 4} is analogous to that of a high cristobalite. The particle sizes of the samples irradiated at 640 and 400 W range from 40 nm to 90 nm and 30 nm to 60 nm, respectively. The effects of different conditions on the experimental outcome are also discussed.

Wang, Rui, E-mail: wr_wrwr@163.com [School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001 (China) [School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001 (China); School of Chemical Engineering, Dalian University of Technology, Dalian 116023 (China); Jiang, Heng; Gong, Hong; Zhang, Jun [School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001 (China)] [School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001 (China)

2012-08-15T23:59:59.000Z

433

Irradiated Fuels Examination Laboratory (IFEL) | ORNL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFunInfrared LandResponsesIon/Surface Reactions andOctoberOxideornl.govFuels

434

Irradiation-assisted stress corrosion cracking behavior of austenitic stainless steels applicable to LWR core internals.  

SciTech Connect (OSTI)

This report summarizes work performed at Argonne National Laboratory on irradiation-assisted stress corrosion cracking (IASCC) of austenitic stainless steels that were irradiated in the Halden reactor in simulation of irradiation-induced degradation of boiling water reactor (BWR) core internal components. Slow-strain-rate tensile tests in BWR-like oxidizing water were conducted on 27 austenitic stainless steel alloys that were irradiated at 288 C in helium to 0.4, 1.3, and 3.0 dpa. Fractographic analysis was conducted to determine the fracture surface morphology. Microchemical analysis by Auger electron spectroscopy was performed on BWR neutron absorber tubes to characterize grain-boundary segregation of important elements under BWR conditions. At 0.4 and 1.4 dpa, transgranular fracture was mixed with intergranular fracture. At 3 dpa, transgranular cracking was negligible, and fracture surface was either dominantly intergranular, as in field-cracked core internals, or dominantly ductile or mixed. This behavior indicates that percent intergranular stress corrosion cracking determined at {approx}3 dpa is a good measure of IASCC susceptibility. At {approx}1.4 dpa, a beneficial effect of a high concentration of Si (0.8-1.5 wt.%) was observed. At {approx}3 dpa, however, such effect was obscured by a deleterious effect of S. Excellent resistance to IASCC was observed up to {approx}3 dpa for eight heats of Types 304, 316, and 348 steel that contain very low concentrations of S. Susceptibility of Types 304 and 316 steels that contain >0.003 wt.% S increased drastically. This indicates that a sulfur related critical phenomenon plays an important role in IASCC. A sulfur content of <0.002 wt.% is the primary material factor necessary to ensure good resistance to IASCC. However, for Types 304L and 316L steel and their high-purity counterparts, a sulfur content of <0.002 wt.% alone is not a sufficient condition to ensure good resistance to IASCC. This is in distinct contrast to the behavior of their high-C counterparts. At S concentrations >0.002 wt.%, the deleterious effect of S is so dominant that a high concentration of C is not an important factor. A two-dimensional map was developed in which susceptibility or resistance to IASCC is shown as a function of bulk concentrations of S and C. Data reported in the literature are consistent with the map. The map is helpful to predict relative IASCC susceptibility of Types 304 and 316 steels. A similar but somewhat different map is helpful to predict IASCC behavior of Type 348 steels. Grain-boundary segregation of S was observed for BWR neutron absorber tubes irradiated to {approx}3 dpa. On the basis of the results of the stress-corrosion-cracking tests and the microstructural characterization, a mechanistic IASCC model has been developed.

Chung, H. M.; Shack, W. J.; Energy Technology

2006-01-31T23:59:59.000Z

435

de Sitter Extremal Surfaces  

E-Print Network [OSTI]

We study extremal surfaces in de Sitter space in the Poincare slicing in the upper patch, anchored on spatial subregions at the future boundary ${\\cal I}^+$, restricted to constant boundary Euclidean time slices (focussing on strip subregions). We find real extremal surfaces of minimal area as the boundaries of past lightcone wedges of the subregions in question: these are null surfaces with vanishing area. We find also complex extremal surfaces as complex extrema of the area functional, and the area is not always real-valued. In $dS_4$ the area is real and has some structural resemblance with entanglement entropy in a dual $CFT_3$. There are parallels with analytic continuation from the Ryu-Takayanagi expressions for holographic entanglement entropy in $AdS$. We also discuss extremal surfaces in the $dS$ black brane and the de Sitter "bluewall" studied previously. The $dS_4$ black brane complex surfaces exhibit a real finite cutoff-independent extensive piece. In the bluewall geometry, there are real surface...

Narayan, K

2015-01-01T23:59:59.000Z

436

UV degradation of accreted organics on Mars: IDP longevity, surface reservoir of organics, and relevance to the detection  

E-Print Network [OSTI]

UV degradation of accreted organics on Mars: IDP longevity, surface reservoir of organics up to 0.35 pptv sol?1 . Citation: Moores, J. E., and A. C. Schuerger (2012), UV degradation in origin and is destroyed primarily by UV irradiation, yielding methane. By combining a numerical UV model

Schuerger, Andrew C.

437

AGR-1 Irradiation Test Final As-Run Report  

SciTech Connect (OSTI)

This document presents the as-run analysis of the AGR-1 irradiation experiment. AGR-1 is the first of eight planned irradiations for the Advanced Gas Reactor (AGR) Fuel Development and Qualification Program. Funding for this program is provided by the US Department of Energy (DOE) as part of the Next-Generation Nuclear Plant (NGNP) project. The objectives of the AGR-1 experiment are: 1. To gain experience with multi-capsule test train design, fabrication, and operation with the intent to reduce the probability of capsule or test train failure in subsequent irradiation tests. 2. To irradiate fuel produced in conjunction with the AGR fuel process development effort. 3. To provide data that will support the development of an understanding of the relationship between fuel fabrication processes, fuel product properties, and irradiation performance. In order to achieve the test objectives, the AGR-1 experiment was irradiated in the B-10 position of the Advanced Test Reactor (ATR) at the Idaho National Laboratory (INL) for a total duration of 620 effective full power days of irradiation. Irradiation began on December 24, 2006 and ended on November 6, 2009 spanning 13 ATR cycles and approximately three calendar years. The test contained six independently controlled and monitored capsules. Each capsule contained 12 compacts of a single type, or variant, of the AGR coated fuel. No fuel particles failed during the AGR-1 irradiation. Final burnup values on a per compact basis ranged from 11.5 to 19.6 %FIMA, while fast fluence values ranged from 2.21 to 4.39 ?1025 n/m2 (E >0.18 MeV). Well say something here about temperatures once thermal recalc is done. Thermocouples performed well, failing at a lower rate than expected. At the end of the irradiation, nine of the originally-planned 19 TCs were considered functional. Fission product release-to-birth (R/B) ratios were quite low. In most capsules, R/B values at the end of the irradiation were at or below 10-7 with only one capsule significantly exceeding this value. A maximum R/B of around 2?10-7 was reached at the end of the irradiation in Capsule 5. Several shakedown issues were encountered and resolved during the first three cycles. These include the repair of minor gas line leaks; repair of faulty gas line valves; the need to position moisture monitors in regions of low radiation fields for proper functioning; the enforcement of proper on-line data storage and backup, the need to monitor thermocouple performance, correcting for detector spectral gain shift, and a change in the mass flow rate range of the neon flow controllers.

Blaise P. Collin

2012-06-01T23:59:59.000Z

438

Irradiation behavior of miniature experimental uranium silicide fuel plates  

SciTech Connect (OSTI)

Uranium silicides, because of their relatively high uranium density, were selected as candidate dispersion fuels for the higher fuel densities required in the Reduced Enrichment Research and Test Reactor (RERTR) Program. Irradiation experience with this type of fuel, however, was limited to relatively modest fission densities in the bulk from, on the order of 7 x 10/sup 20/ cm/sup -3/, far short of the approximately 20 x 10/sup 20/ cm/sup -3/ goal established for the RERTR program. The purpose of the irradiation experiments on silicide fuels on the ORR, therefore, was to investigate the intrinsic irradiation behavior of uranium silicide as a dispersion fuel. Of particular interest was the interaction between the silicide particles and the aluminum matrix, the swelling behavior of the silicide particles, and the maximum volume fraction of silicide particles that could be contained in the aluminum matrix.

Hofman, G.L.; Neimark, L.A.; Mattas, R.F.

1983-01-01T23:59:59.000Z

439

Neutron and gamma irradiation damage to organic materials.  

SciTech Connect (OSTI)

This document discusses open literature reports which investigate the damage effects of neutron and gamma irradiation on polymers and/or epoxies - damage refers to reduced physical chemical, and electrical properties. Based on the literature, correlations are made for an SNL developed epoxy (Epon 828-1031/DDS) with an expected total fast-neutron fluence of {approx}10{sup 12} n/cm{sup 2} and a {gamma} dosage of {approx}500 Gy received over {approx}30 years at < 200 C. In short, there are no gamma and neutron irradiation concerns for Epon 828-1031/DDS. To enhance the fidelity of our hypotheses, in regards to radiation damage, we propose future work consisting of simultaneous thermal/irradiation (neutron and gamma) experiments that will help elucidate any damage concerns at these specified environmental conditions.

White, Gregory Von, II; Bernstein, Robert

2012-04-01T23:59:59.000Z

440

On the Absorption and Redistribution of Energy in Irradiated Planets  

E-Print Network [OSTI]

We present a sequence of toy models for irradiated planet atmospheres, in which the effects of geometry and energy redistribution are modelled self-consistently. We use separate but coupled grey atmosphere models to treat the ingoing stellar irradiation and outgoing planetary reradiation. We investigate how observed quantities such as full phase secondary eclipses and orbital phase curves depend on various important parameters, such as the depth at which irradiation is absorbed and the depth at which energy is redistributed. We also compare our results to the more detailed radiative transfer models in the literature, in order to understand how those map onto the toy model parameter space. Such an approach can prove complementary to more detailed calculations, in that they demonstrate, in a simple way, how the solutions change depending on where, and how, energy redistribution occurs. As an example of the value of such models, we demonstrate how energy redistribution and temperature equilibration at moderate o...

Hansen, Brad

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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

[Grain boundary and interface kinetics during ion irradiation  

SciTech Connect (OSTI)

Proposed here is renewed support of a research program focused on interface motion and phase transformation during ion irradiation, with emphasis on elemental semiconductors. Broadly speaking, the aims of this program are to explore defect kinetics in amorphous and crystalline semiconductors, and to relate defect dynamics to interface motion and phase transformations. Over the last three years, we initiated a program under DOE support to explore crystallization and amorphization of elemental semiconductors under irradiation. This research has enabled new insights about the nature of defects in amorphous semiconductors and about microstructural evolution in the early stages of crystallization. In addition, we have demonstrated almost arbitrary control over the relative rates of crystal nucleation and crystal growth in silicon. As a result, the impinged grain microstructure of thin (100 nm) polycrystalline films crystallized under irradiation can be controlled with grain sizes ranging from a few nanometers to several micrometers, which may have interesting technological implications.

Atwater, H.A.

1991-12-31T23:59:59.000Z

442

(Grain boundary and interface kinetics during ion irradiation)  

SciTech Connect (OSTI)

Proposed here is renewed support of a research program focused on interface motion and phase transformation during ion irradiation, with emphasis on elemental semiconductors. Broadly speaking, the aims of this program are to explore defect kinetics in amorphous and crystalline semiconductors, and to relate defect dynamics to interface motion and phase transformations. Over the last three years, we initiated a program under DOE support to explore crystallization and amorphization of elemental semiconductors under irradiation. This research has enabled new insights about the nature of defects in amorphous semiconductors and about microstructural evolution in the early stages of crystallization. In addition, we have demonstrated almost arbitrary control over the relative rates of crystal nucleation and crystal growth in silicon. As a result, the impinged grain microstructure of thin (100 nm) polycrystalline films crystallized under irradiation can be controlled with grain sizes ranging from a few nanometers to several micrometers, which may have interesting technological implications.

Atwater, H.A.

1991-01-01T23:59:59.000Z

443

TEST RESULTS FROM GAMMA IRRADIATION OF ALUMINUM OXYHYDROXIDES  

SciTech Connect (OSTI)

Hydrated metal oxides or oxyhydroxides boehmite and gibbsite that can form on spent aluminum-clad nuclear fuel assemblies during in-core and post-discharge wet storage were exposed as granular powders to gamma irradiation in a {sup 60}Co irradiator in closed laboratory test vessels with air and with argon as separate cover gases. The results show that boehmite readily evolves hydrogen with exposure up to a dose of 1.8 x 10{sup 8} rad, the maximum tested, in both a full-dried and moist condition of the powder, whereas only a very small measurable quantity of hydrogen was generated from the granular powder of gibbsite. Specific information on the test setup, sample characteristics, sample preparation, irradiation, and gas analysis are described.

Fisher, D.; Westbrook, M.; Sindelar, R.

2012-02-01T23:59:59.000Z

444

Physiological Interaction of Heart and Lung in Thoracic Irradiation  

SciTech Connect (OSTI)

Introduction: The risk of early radiation-induced lung toxicity (RILT) limits the dose and efficacy of radiation therapy of thoracic tumors. In addition to lung dose, coirradiation of the heart is a known risk factor in the development RILT. The aim of this study was to identify the underlying physiology of the interaction between lung and heart in thoracic irradiation. Methods and Materials: Rat hearts, lungs, or both were irradiated to 20 Gy using high-precision proton beams. Cardiopulmonary performance was assessed using breathing rate measurements and F{sup 18}-fluorodeoxyglucose positron emission tomography ({sup 18}F-FDG-PET) scans biweekly and left- and right-sided cardiac hemodynamic measurements and histopathology analysis at 8 weeks postirradiation. Results: Two to 12 weeks after heart irradiation, a pronounced defect in the uptake of {sup 18}F-FDG in the left ventricle (LV) was observed. At 8 weeks postirradiation, this coincided with LV perivascular fibrosis, an increase in LV end-diastolic pressure, and pulmonary edema in the shielded lungs. Lung irradiation alone not only increased pulmonary artery pressure and perivascular edema but also induced an increased LV relaxation time. Combined irradiation of lung and heart induced pronounced increases in LV end-diastolic pressure and relaxation time, in addition to an increase in right ventricle end-diastolic pressure, indicative of biventricular diastolic dysfunction. Moreover, enhanced pulmonary edema, inflammation and fibrosis were also observed. Conclusions: Both lung and heart irradiation cause cardiac and pulmonary toxicity via different mechanisms. Thus, when combined, the loss of cardiopulmonary performance is intensified further, explaining the deleterious effects of heart and lung coirradiation. Our findings show for the first time the physiological mechanism underlying the development of a multiorgan complication, RILT. Reduction of dose to either of these organs offers new opportunities to improve radiation therapy treatment of thoracic tumors, potentially facilitating increased treatment doses and tumor control.

Ghobadi, Ghazaleh; Veen, Sonja van der [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands) [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Department of Cell Biology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Bartelds, Beatrijs [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Boer, Rudolf A. de [Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Department of Cardiology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Dickinson, Michael G. [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Jong, Johan R. de [Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Faber, Hette; Niemantsverdriet, Maarten [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands) [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Department of Cell Biology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Brandenburg, Sytze [Kernfysisch Versneller Instituut, University of Groningen, Groningen (Netherlands)] [Kernfysisch Versneller Instituut, University of Groningen, Groningen (Netherlands); Berger, Rolf M.F. [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Center for Congenital Heart Disease, Beatrix Children Hospital, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Langendijk, Johannes A. [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)] [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Coppes, Robert P. [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands) [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Department of Cell Biology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands); Luijk, Peter van, E-mail: p.van.luijk@umcg.nl [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen (Netherlands)

2012-12-01T23:59:59.000Z

445

Structural and luminescent properties of electron-irradiated silicon  

SciTech Connect (OSTI)

Structural defects induced by electron irradiation of p-Cz-Si wafers were identified. The influence of the annealing conditions in a chlorine-containing atmosphere on the structural and luminescent properties of the samples was examined. Light-emitting diodes based on electron-irradiated and high-temperature-annealed wafers were fabricated by a vapour-phase epitaxy technique and their luminescence properties were studied. A high-intensity dislocation-related D1 line was observed at 1.6 ?m in the room-temperature electroluminescence spectrum.

Sobolev, N. A.; Loshachenko, A. S. [Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia and Fok Institute of Physics, St. Petersburg State University, 198504 St. Petersburg (Russian Federation); Aruev, P. N.; Kalyadin, A. E.; Shek, E. I.; Zabrodskiy, V. V. [Ioffe Physical-Technical Institute, 194021 St. Petersburg (Russian Federation); Shtel'makh, K. F. [Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia and St. Petersburg State Technical University, 195251 St. Petersburg (Russian Federation); Vdovin, V. I. [Rzhanov Institute of Semiconductor Physics, 630090 Novosibirsk (Russian Federation); Xiang, Luelue; Yang, Deren [State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, 310027 Hangzhou (China)

2014-02-21T23:59:59.000Z

446

Fission product release from irradiated LWR fuel under accident conditions  

SciTech Connect (OSTI)

Fission product release from irradiated LWR fuel is being studied by heating fuel rod segments in flowing steam and an inert carrier gas to simulate accident conditions. Fuels with a range of irradiation histories are being subjected to several steam flow rates over a wide range of temperatures. Fission product release during each test is measured by gamma spectroscopy and by detailed examination of the collection apparatus after the test has been completed. These release results are complemented by a detailed posttest examination of samples of the fuel rod segment. Results of release measurements and fuel rod characterizations for tests at 1400 through 2000/sup 0/C are presented in this paper.

Strain, R.V.; Sanecki, J.E.; Osborne, M.F.

1984-01-01T23:59:59.000Z

447

Thermal response of photovoltaic cell to laser beam irradiation  

E-Print Network [OSTI]

This paper firstly presents the concept of using dual laser beam to irradiate the photovoltaic cell, so as to investigate the temperature dependency of the efficiency of long distance energy transmission. Next, the model on the multiple reflection and absorption of any monochromatic light in multilayer structure has been established, and the heat generation in photovoltaic cell has been interpreted in this work. Then, the finite element model has been set up to calculate the temperature of photovoltaic cell subjected to laser irradiation. Finally, the effect of temperature elevation on the efficiency and reliability of photovoltaic cell has been discussed to provide theoretical references for designing the light-electricity conversion system.

Yuan, Yu-Chen

2014-01-01T23:59:59.000Z

448

The effects of gamma irradiation on Serratia marcescens  

E-Print Network [OSTI]

that there was little difference in the five strains. This suggests that growth rates do not alter the survival curves. The effects of irradiation on pigmentation ability were studied using the wild type, nims, and the more-resistant R-25. Pyrex tubes, 16 x 150 mm...). 5. D. L. Dewey, The X-ray sensitivity of Serratia marcescens. Radiation Res. 19, 64-87 (1963). 6. D. L. Dewey, Effect of irradiation on the ability of Pseudonrtnas to synthesize two inducible enzymes. Radiation Res. 21, 367-75 (1964). 7. F...

Bartlett, William Thomas

1969-01-01T23:59:59.000Z

449

Light water reactor mixed-oxide fuel irradiation experiment  

SciTech Connect (OSTI)

The United States Department of Energy Office of Fissile Materials Disposition is sponsoring and Oak Ridge National Laboratory (ORNL) is leading an irradiation experiment to test mixed uranium-plutonium oxide (MOX) fuel made from weapons-grade (WG) plutonium. In this multiyear program, sealed capsules containing MOX fuel pellets fabricated at Los Alamos National Laboratory (LANL) are being irradiated in the Advanced Test Reactor (ATR) at the Idaho National Engineering and Environmental Laboratory (INEEL). The planned experiments will investigate the utilization of dry-processed plutonium, the effects of WG plutonium isotopics on MOX performance, and any material interactions of gallium with Zircaloy cladding.

Hodge, S.A.; Cowell, B.S. [Oak Ridge National Lab., TN (United States); Chang, G.S.; Ryskamp, J.M. [Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States). Idaho National Engineering and Environmental Lab.

1998-06-01T23:59:59.000Z

450

SLIGHTLY IRRADIATED FUEL (SIF) INTERIM DISPOSITION PROJECT  

SciTech Connect (OSTI)

CH2M HILL Plateau Remediation Company (CH2M HILL PRC) is proud to submit the Slightly Irradiated Fuel (SIF) Interim Disposition Project for consideration by the Project Management Institute as Project of the Year for 2010. The SIF Project was a set of six interrelated sub-projects that delivered unique stand-alone outcomes, which, when integrated, provided a comprehensive and compliant system for storing high risk special nuclear materials. The scope of the six sub-projects included the design, construction, testing, and turnover of the facilities and equipment, which would provide safe, secure, and compliant Special Nuclear Material (SNM) storage capabilities for the SIF material. The project encompassed a broad range of activities, including the following: Five buildings/structures removed, relocated, or built; Two buildings renovated; Structural barriers, fencing, and heavy gates installed; New roadways and parking lots built; Multiple detection and assessment systems installed; New and expanded communication systems developed; Multimedia recording devices added; and A new control room to monitor all materials and systems built. Project challenges were numerous and included the following: An aggressive 17-month schedule to support the high-profile Plutonium Finishing Plant (PFP) decommissioning; Company/contractor changeovers that affected each and every project team member; Project requirements that continually evolved during design and construction due to the performance- and outcome-based nature ofthe security objectives; and Restrictions imposed on all communications due to the sensitive nature of the projects In spite of the significant challenges, the project was delivered on schedule and $2 million under budget, which became a special source of pride that bonded the team. For years, the SIF had been stored at the central Hanford PFP. Because of the weapons-grade piutonium produced and stored there, the PFP had some of the tightest security on the Hanford nuclear reservation. Workers had to pass through metal detectors when they arrived at the plant and materials leaving the plant had to be scanned for security reasons. Whereas other high-security nuclear materials were shipped from the PFP to Savannah River, S.C. as part ofa Department of Energy (DOE) program to consolidate weapons-grade plutonium, it was determined that the SIF should remain onsite pending disposition to a national repository. Nevertheless, the SIF still requires a high level of security that the PFP complex has always provided. With the 60-year PFP mission of producing and storing plutonium concluded, the environmental cleanup plans for Hanford call for the demolition of the 63-building PFP complex. Consequently, if the SIF remained at PFP it not only would have interfered with the environmental cleanup plans, but would have required $100 million in facility upgrades to meet increased national security requirements imposed after the 9/11 terrorist attacks. A new smaller and more cost-effective area was needed to store this material, which led to the SIF Project. Once the SIF project was successfully completed and the SIF was safely removed from PFP, the existing Protected Area at PFP could be removed, and demolition could proceed more quickly without being encumbered by restrictive security requirements that an active Protected Area requires. The lightened PFP security level brought by safely removing and storing the SIF would also yield lowered costs for deactivation and demolition, as well as reduce overall life-cycle costs.

NORTON SH

2010-02-23T23:59:59.000Z

451

Surface wave interferometry  

E-Print Network [OSTI]

This thesis concerns the application of seismic interferometry to surface waves. Seismic interferometry is the process by which the wavefield between two recording locations is estimated, resulting in new recordings at ...

Halliday, David Fraser

2009-01-01T23:59:59.000Z

452

A surface ionization source  

E-Print Network [OSTI]

The main part of the work described herein is the development and testing of a surface ionization source for use on a collinear fast beam laser spectroscopy apparatus. A description of the previously existing fast beam apparatus is given...

Buzatu, Daniel J.

1995-01-01T23:59:59.000Z

453

Structured surfaces for hemocompatibility  

E-Print Network [OSTI]

The rise of micro- and nano-technologies has brought to light intriguing examples of scale-driven performance in a diverse array of fields. The quest to create highly hydrophobic surfaces is one such field. The application ...

Schrauth, Anthony J

2005-01-01T23:59:59.000Z

454

SURFACE NONLINEAR OPTICS  

E-Print Network [OSTI]

B. de Castro, and Y. R. Shen, Optics Lett. i, 393 See, for3, 1980 SURFACE NONLINEAR OPTICS Y.R. Shen, C.K. Chen, andde Janiero SURFRACE NONLINEAR OPTICS Y. R. Shen, C. K. Chen,

Shen, Y.R.

2010-01-01T23:59:59.000Z

455

Entropy and surfaceness  

E-Print Network [OSTI]

The layer of the Earth's atmosphere which contains clouds and weather systems is a thin thermoregulatory surface. It maintains an exact energy budget between the Earth and the Sun. Recent work in theoretical physics is ...

Casper, James Kyle

1997-01-01T23:59:59.000Z

456

Asteroid Surface Geophysics  

E-Print Network [OSTI]

The regolith-covered surfaces of asteroids preserve records of geophysical processes that have occurred both at their surfaces and sometimes also in their interiors. As a result of the unique micro-gravity environment that these bodies posses, a complex and varied geophysics has given birth to fascinating features that we are just now beginning to understand. The processes that formed such features were first hypothesised through detailed spacecraft observations and have been further studied using theoretical, numerical and experimental methods that often combine several scientific disciplines. These multiple approaches are now merging towards a further understanding of the geophysical states of the surfaces of asteroids. In this chapter we provide a concise summary of what the scientific community has learned so far about the surfaces of these small planetary bodies and the processes that have shaped them. We also discuss the state of the art in terms of experimental techniques and numerical simulations that...

Murdoch, Naomi; Schwartz, Stephen R; Miyamoto, Hideaki

2015-01-01T23:59:59.000Z

457

Radiochemical Transformation of High Pressure Methane under Gamma, Electron, and Neutron Irradiation  

E-Print Network [OSTI]

The chemical effects of irradiation on high pressure methane and noble gas mixtures were investigated using gamma, electron beam, and neutron irradiation sources. The gamma source used was the La-140 source from the Nuclear Science Center (NSC...

Clemens, Jeffrey Tyler

2014-05-01T23:59:59.000Z

458

Etch-free Formation of Porous Silicon by High-energy Ion Irradiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Etch-free Formation of Porous Silicon by High-energy Ion Irradiation. Etch-free Formation of Porous Silicon by High-energy Ion Irradiation. Abstract: In this study, porous silicon...

459

U.S. consumers' acceptance and willingness to buy irradiated food  

E-Print Network [OSTI]

in their decisions regarding irradiated foods. Education programs seem to have positive effects on shaping consumer opinion about irradiation, which can improve the safety of food products. Thus, the results of this study provide useful information required...

Poghosyan, Arsen Vahagn

2002-01-01T23:59:59.000Z

460

Radiosensitization Strategies for Enhanced E-beam Irradiation Treatment of Fresh Produce  

E-Print Network [OSTI]

necessary to develop treatments that will reduce their prevalence and numbers on fresh produce. Irradiation is a penetrating nonthermal treatment that effectively eliminates bacteria. Irradiated baby spinach leaves up to 1.0 kGy showed negligible (P>0...

Gomes, Carmen

2011-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "irradiance nasa surface" 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.


461

Conjugated linoleic acid reduces lipid oxidation in irradiated, cooked ground beef patties  

E-Print Network [OSTI]

This study was conducted to examine the antioxidative effect of conjugated linoleic acid (CLA) in irradiated, cooked ground beef patties. The hypothesis was that CLA would be retained during irradiation and would reduce lipid oxidation...

Chae, Sung Hee

2007-09-17T23:59:59.000Z

462

Electron Irradiation Induced Changes of the Electrical Transport Properties of Graphene  

E-Print Network [OSTI]

. In addition, the effect of electron irradiation on a PMMA (Poly Methyl Methacrylate)/Graphene bilayer was studied. We observed a deterioration of the electrical transport properties of a graphene FET. Prior to electron irradiation, we observed that the PMMA...

Woo, Sung Oh

2014-08-06T23:59:59.000Z

463

E-Print Network 3.0 - alleviates irradiation-induced brain Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

irradiation-induced brain Search Powered by Explorit Topic List Advanced Search Sample search results for: alleviates irradiation-induced brain Page: << < 1 2 3 4 5 > >> 1 ORIGINAL...

464

Response of nanostructured ferritic alloys to high-dose heavy ion irradiation  

SciTech Connect (OSTI)

A latest-generation aberration-corrected scanning/transmission electron microscope (STEM) is used to study heavy-ion-irradiated nanostructured ferritic alloys (NFAs). Results are presented for STEM X-ray mapping of NFA 14YWT irradiated with 10 MeV Pt to 16 or 160 dpa at -100C and 750C, as well as pre-irradiation reference material. Irradiation at -100C results in ballistic destruction of the beneficial microstructural features present in the pre-irradiated reference material, such as Ti-Y-O nanoclusters (NCs) and grain boundary (GB) segregation. Irradiation at 750C retains these beneficial features, but indicates some coarsening of the NCs, diffusion of Al to the NCs, and a reduction of the Cr-W GB segregation (or solute excess) content. Ion irradiation combined with the latest-generation STEM hardware allows for rapid screening of fusion candidate materials and improved understanding of irradiation-induced microstructural changes in NFAs.

Parish, Chad M.; White, Ryan M.; LeBeau, James M.; Miller, Michael K.

2014-02-01T23:59:59.000Z

465

E-Print Network 3.0 - animal irradiation preliminary Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Centre de mathmatiques Collection: Mathematics 97 Irradiation of Nd-Fe-B Permanent Magnets with APS Bending Magnet X-rays and 60 Summary: 1 Irradiation of Nd-Fe-B...

466

E-Print Network 3.0 - accelerator irradiation issledovaniya Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Group Collection: Physics 66 Irradiation of Nd-Fe-B Permanent Magnets with APS Bending Magnet X-rays and 60 Summary: of 260 Mrad was used to irradiate Nd-Fe-B sample magnets with...

467

Ion irradiation of Fe-Fe oxide core-shell nanocluster films:...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

irradiation of Fe-Fe oxide core-shell nanocluster films: Effect of interface on stability of magnetic properties. Ion irradiation of Fe-Fe oxide core-shell nanocluster films:...

468

Mutation Research 568 (2004) 4148 Detection of chromosomal instability in -irradiated  

E-Print Network [OSTI]

in the progeny at subsequent generations (genomic instability) and in non-irradiated neighbors of irradiated the link between the radiation-induced phenomena of genomic instability and the bystander effect. © 2004

469

Characterizing Aerosol Distributions and Optical Properties Using the NASA Langley High Spectral Resolution Lidar  

SciTech Connect (OSTI)

The objective of this project was to provide vertically and horizontally resolved data on aerosol optical properties to assess and ultimately improve how models represent these aerosol properties and their impacts on atmospheric radiation. The approach was to deploy the NASA Langley Airborne High Spectral Resolution Lidar (HSRL) and other synergistic remote sensors on DOE Atmospheric Science Research (ASR) sponsored airborne field campaigns and synergistic field campaigns sponsored by other agencies to remotely measure aerosol backscattering, extinction, and optical thickness profiles. Synergistic sensors included a nadir-viewing digital camera for context imagery, and, later in the project, the NASA Goddard Institute for Space Studies (GISS) Research Scanning Polarimeter (RSP). The information from the remote sensing instruments was used to map the horizontal and vertical distribution of aerosol properties and type. The retrieved lidar parameters include profiles of aerosol extinction, backscatter, depolarization, and optical depth. Products produced in subsequent analyses included aerosol mixed layer height, aerosol type, and the partition of aerosol optical depth by type. The lidar products provided vertical context for in situ and remote sensing measurements from other airborne and ground-based platforms employed in the field campaigns and was used to assess the predictions of transport models. Also, the measurements provide a data base for future evaluation of techniques to combine active (lidar) and passive (polarimeter) measurements in advanced retrieval schemes to remotely characterize aerosol microphysical properties. The project was initiated as a 3-year project starting 1 January 2005. It was later awarded continuation funding for another 3 years (i.e., through 31 December 2010) followed by a 1-year no-cost extension (through 31 December 2011). This project supported logistical and flight costs of the NASA sensors on a dedicated aircraft, the subsequent analysis and archival of the data, and the presentation of results in conferences, workshops, and publications. DOE ASR field campaigns supported under this project included - MAX-Mex /MILAGRO (2006) - TexAQS 2006/GoMACCS (2006) - CHAPS (2007) - RACORO (2009) - CARE/CalNex (2010) In addition, data acquired on HSRL airborne field campaigns sponsored by other agencies were used extensively to fulfill the science objectives of this project and the data acquired have been made available to other DOE ASR investigators upon request.

Hostetler, Chris; Ferrare, Richard

2013-02-14T23:59:59.000Z

470

Phase field simulation of kinetic superheating and melting of aluminum nanolayer irradiated by pico- and femtosecond laser  

SciTech Connect (OSTI)

Two melting mechanisms are reproduced and quantified for superheating and melting of Al nanolayer irradiated by pico- and femtosecond laser using the advanced phase-field approach coupled with mechanics and a two-temperature model. At heating rates Q?79.04 K/ps induced by picosecond laser, two-sided barrierless surface melting forms two solid-melt interfaces, which meet near the center of a sample. The temperature for surface melting is a linear function, and for complete melting it is a cubic function, of logQ. At Q?300 K/ps induced by femtosecond laser, barrierless and homogeneous melting (without nucleation) at the sample center occurs faster than due to interface propagation. Good agreement with experimental melting time was achieved in a range of 0.95?Q?1290 K/ps without fitting of material parameters.

Seok Hwang, Yong [Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50011 (United States)] [Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50011 (United States); Levitas, Valery I. [Departments of Aerospace Engineering, Mechanical Engineering, and Material Science and Engineering, Iowa State University, Ames, Iowa 50011 (United States)] [Departments of Aerospace Engineering, Mechanical Engineering, and Material Science and Engineering, Iowa State University, Ames, Iowa 50011 (United States)

2013-12-23T23:59:59.000Z

471

Imaging the ultrafast Kerr effect, free carrier generation, relaxation and ablation dynamics of Lithium Niobate irradiated with femtosecond laser pulses  

SciTech Connect (OSTI)

The interaction of high-power single 130 femtosecond (fs) laser pulses with the surface of Lithium Niobate is experimentally investigated in this work. The use of fs-resolution time-resolved microscopy allows us to separately observe the instantaneous optical Kerr effect induced by the pulse and the generation of a free electron plasma. The maximum electron density is reached 550?fs after the peak of the Kerr effect, confirming the presence of a delayed carrier generation mechanism. We have also observed the appearance of transient Newton rings during the ablation process, related to optical interference of the probe beam reflected at the front and back surface of the ablating layer. Finally, we have analyzed the dynamics of the photorefractive effect on a much longer time scale by measuring the evolution of the transmittance of the irradiated area for different fluences below the ablation threshold.

Garcia-Lechuga, Mario, E-mail: mario@io.cfmac.csic.es; Siegel, Jan, E-mail: j.siegel@io.cfmac.csic.es; Hernandez-Rueda, Javier; Solis, Javier [Laser Processing Group, Instituto de Optica, CSIC, Serrano 121, 28006 Madrid (Spain)

2014-09-21T23:59:59.000Z

472

E-Print Network 3.0 - argon ion irradiation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

mathmatiques Collection: Mathematics 3 Straightening Suspended Single Walled Carbon Nanotubes by Ion Irradiation Summary: Straightening Suspended Single Walled Carbon Nanotubes...

473

Irradiation Testing of Blanket Materials at the HFR Petten with On Line Tritium Monitoring  

SciTech Connect (OSTI)

Irradiation experiments are performed in support of fusion blanket technology development. These comprise ceramic solid breeder materials, and a liquid Lithium Lead alloy, as well as blanket subassemblies and components. Experimental facilities at the HFR to study tritium release, permeation characteristics, and neutron irradiation performance, have recently been extended. This paper gives an overview on the tritium breeding materials irradiation programme and describes the facilities required for irradiation testing and on-line tritium measurement.

Magielsen, A.J.; Laan, J.G. van der; Hegeman, J.B.J.; Stijkel, M.P.; Ooijevaar, M.A.G

2005-07-15T23:59:59.000Z

474

SURVEILLANCE OF PHOTOVOLTAIC SOLAR ENERGY SYSTEMS USING METEOSAT DERIVED IRRADIANCES  

E-Print Network [OSTI]

SURVEILLANCE OF PHOTOVOLTAIC SOLAR ENERGY SYSTEMS USING METEOSAT DERIVED IRRADIANCES Annette Hammer.Heinemann@uni-oldenburg.de 2Enecolo AG, Lindhof 235, CH-8617 M¨onchaltorf 3Fraunhofer Insitute for Solar Energy Systems Wiemken3, Hans Georg Beyer4, Vincent van Dijk5, Jethro Betcke5 1Dept. of Energy and Semiconductor Research

Heinemann, Detlev

475

SOLAR IRRADIANCE FORECASTING FOR THE MANAGEMENT OF SOLAR ENERGY SYSTEMS  

E-Print Network [OSTI]

SOLAR IRRADIANCE FORECASTING FOR THE MANAGEMENT OF SOLAR ENERGY SYSTEMS Detlev Heinemann Oldenburg.girodo@uni-oldenburg.de ABSTRACT Solar energy is expected to contribute major shares of the future global energy supply. Due to its and solar energy conversion processes has to account for this behaviour in respective operating strategies

Heinemann, Detlev

476

The modelling of irradiation embrittlement in submerged-arc welds  

SciTech Connect (OSTI)

Until very recently, the irradiation embrittlement behavior of submerged-arc welds has been interpreted in terms of two mechanisms, namely a matrix damage component and an additional component due to the irradiation-enhanced production of copper-rich precipitates. However, some of the weld specimens from a recent accelerated re-irradiation experiment have shown high Charpy shifts which exceeded the values expected from the measured shift in yield stress. Microstructural examination has revealed the occurrence of intergranular fracture (IGF) in these specimens, accompanied by grain boundary segregation of phosphorus. Theoretical models were developed to predict the parametric dependence of irradiation-enhanced phosphorus segregation on experimental variables. Using these parametric forms, along with the concept of a critical level of segregation for the onset of IGF instead of cleavage, a three mechanism trend curve has been developed. The form of this trend curve, taking into account IGF as well as matrix and copper embrittlement, is thus mechanistically based. The constants in the equation, however, are obtained by a statistical fit to the actual Charpy shift database.

Bolton, C.J.; Buswell, J.T.; Jones, R.B.; Moskovic, R.; Priest, R.H. [Nuclear Electric plc, Berkeley (United Kingdom). Berkeley Technology Centre

1996-12-31T23:59:59.000Z

477

Simultaneous Irradiation and Imaging of Blood Vessels During Pulsed  

E-Print Network [OSTI]

energy produced hemorrhage. In larger vessels, coagula often were attached to the superficial vessel wall; port wine stains INTRODUCTION Previous studies examining the effect of la- ser irradiation on cutaneous preparation. The short pulse duration illus- trated an extreme; energy was deposited quickly Contract grant

Barton, Jennifer K.

478

Development of a chemical dosimeter for electron beam food irradiation  

E-Print Network [OSTI]

uniform irradiation treatment on apple-phantoms (a complex shaped target) and GAFCHROMIC® HD-810 films using electron beams from (1) a 2 MeV Van de Graaff (VDG) accelerator, (2) a 10 MeV Linear Accelerator (LINAC), and (3) X-rays from a 5 MeV LINAC...

Rivadeneira, Ramiro Geovanny

2006-08-16T23:59:59.000Z

479

RETHINKING SATELLITE BASED SOLAR IRRADIANCE MODELLING R. W. Mueller  

E-Print Network [OSTI]

of Oldenburg, D-26111 Oldenburg; 2-University of Bergen; 3-Fraunhofer Institute for Solar Energy Systems; 4-German Aerospace Center; 5-Ecole des Mines de Paris ABSTRACT Accurate solar irradiance data are not only necessary for an efficient planning and operation of solar energy systems. Within the European project

Heinemann, Detlev

480

adt materials irradiated: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

adt materials irradiated First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Umsetzung von ADTs ADT in...

Note: This page contains sample records for the topic "irradiance nasa surface" 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.


481

Large Animal Irradiation J. Daniel Bourland, PhD  

E-Print Network [OSTI]

Departments of Physics and Biomedical Engineering Wake Forest School of Medicine Winston-Salem, North Carolina · Summary #12;Irradiation Issues same as for humans · Animal size (nominal L x W x H) · Photon energy (to Beam (high energy) Orthovoltage or Diagnostic X rays (low energy) #12;Isodose Curves Representing

482

Lymphocyte depletion in peripheral blood of gamma irradiated rats  

E-Print Network [OSTI]

38. F. H. Hager, A study of the effect of partial-body irradiation on the early reduction of circulating lymphocytes. (Thesis) Texas AKM University, 1969. 39. G. D'Angelo and M. Lacombe, A practical diluent for electz onic white cell counts. Amer...

Goldin, Eric Michael

1972-01-01T23:59:59.000Z

483

Spatial Pattern Formation in Fused Silica Under UV Irradiation  

E-Print Network [OSTI]

Spatial Pattern Formation in Fused Silica Under UV Irradiation Problem Presenter Leslie Button lenses gradually degrades and ultimately damages these optical components. Corning is a global supplier of optical and ceramic materials across various industries and is particularly interested in this damage

Edwards, David A.

484

Vacuum aperture isolator for retroreflection from laser-irradiated target  

DOE Patents [OSTI]

The disclosure is directed to a vacuum aperture isolator for retroreflection of a laser-irradiated target. Within a vacuum chamber are disposed a beam focusing element, a disc having an aperture and a recollimating element. The edge of the focused beam impinges on the edge of the aperture to produce a plasma which refracts any retroreflected light from the laser's target.

Benjamin, Robert F. (Los Alamos, NM); Mitchell, Kenneth B. (Los Alamos, NM)

1980-01-01T23:59:59.000Z

485

The AGR-1 Irradiation -Objectives, Success Criteria and Risk Management  

SciTech Connect (OSTI)

The AGR-1 experiment being conducted by the US Department of Energy Advanced Gas Reactor Fuel Development and Qualification Program (AGR fuel program) will irradiate TRISO-coated particle fuel in compacts under conditions representative of a Very High Temperature Reactor (VHTR) core. The anticipated fuel performance requirements of a prismatic core VHTR significantly exceed established TRISO-coated particle fuel capability in terms of burnup, temperature and fast fluence. AGR-1 is the first in a planned series of eight irradiations leading to the qualification of low enriched uranium coated particle fuel compacts for service in a VHTR, as identified in an overall Technical Program Plan produced at the beginning of the program . The AGR-1 experiment is scheduled for insertion in the Advanced Test Reactor (ATR) in the first quarter of fiscal year 2007 and to be irradiated for a period of up to approximately two and a half years. The irradiation rig, designated a "test train" is designed to provide six independently controlled (for temperature) and monitored (for fission product gas release) capsules containing fuel samples.

James Kendall

2006-06-01T23:59:59.000Z

486

Proton Irradiation Damage Assessment of Carbon Reinforced Composites  

E-Print Network [OSTI]

Proton Irradiation Damage Assessment of Carbon Reinforced Composites: 2-D & 3-D Weaved Structures carbon-carbon composite ATJ Graphite 3D CC composite AGS Beam-on-Target tests show clearly that carbon composites are better absorbers of thermo- mechanical shock. This is attributed to the very low coeff

McDonald, Kirk

487

Post Irradiation Capabilities at the Idaho National Laboratory  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) Office of Nuclear Energy (NE) oversees the research, development, and demonstration activities that ensure nuclear energy remains a viable energy option for the United States. Fuel and material development through fabrication, irradiation, and characterization play a significant role in accomplishing the research needed to support nuclear energy. All fuel and material development requires the understanding of irradiation effects on the fuel performance and relies on irradiation experiments ranging from tests aimed at targeted scientific questions to integral effects under representative and prototypic conditions. The DOE recently emphasized a solution-driven, goal-oriented, science-based approach to nuclear energy development. Nuclear power systems and materials were initially developed during the latter half of the 20th century and greatly facilitated by the United States ability and willingness to conduct large-scale experiments. Fifty-two research and test reactors with associated facilities for performing fabrication and pre and post irradiation examinations were constructed at what is now Idaho National Laboratory (INL), another 14 at Oak Ridge National Laboratory (ORNL), and a few more at other national laboratory sites. Building on the scientific advances of the last several decades, our understanding of fundamental nuclear science, improvements in computational platforms, and other tools now enable technological advancements with less reliance on large-scale experimentation.

Schulthess, J.L.

2011-08-01T23:59:59.000Z

488

Post Irradiation Capabilities at the Idaho National Laboratory  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) Office of Nuclear Energy (NE) oversees the research, development, and demonstration activities that ensure nuclear energy remains a viable energy option for the United States. Fuel and material development through fabrication, irradiation, and characterization play a significant role in accomplishing the research needed to support nuclear energy. All fuel and material development requires the understanding of irradiation effects on the fuel performance and relies on irradiation experiments ranging from tests aimed at targeted scientific questions to integral effects under representative and prototypic conditions. The DOE recently emphasized a solution-driven, goal-oriented, science-based approach to nuclear energy development. Nuclear power systems and materials were initially developed during the latter half of the 20th century and greatly facilitated by the United States ability and willingness to conduct large-scale experiments. Fifty-two research and test reactors with associated facilities for performing fabrication and pre and post irradiation examinations were constructed at what is now Idaho National Laboratory (INL), another 14 at Oak Ridge National Laboratory (ORNL), and a few more at other national laboratory sites. Building on the scientific advances of the last several decades, our understanding of fundamental nuclear science, improvements in computational platforms, and other tools now enable technological advancements with less reliance on large-scale experimentation.

Schulthess, J.L.; Robert D. Mariani; Rory Kennedy; Doug Toomer

2011-08-01T23:59:59.000Z

489

Compressive Strength of Gamma-Irradiated Polymer Concrete  

E-Print Network [OSTI]

Compressive Strength of Gamma-Irradiated Polymer Concrete Gonzalo Marti´nez-Barrera,1,2 Uriel concrete (PC) was developed by using differ- ent concentrations of silica sand as aggregate of Plastics Engineers INTRODUCTION Polymer concrete (PC) is a particulate composite where thermoset resins

North Texas, University of

490

atomic hydrogen irradiation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

hydrogen irradiation First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Synergistic Formation of Radicals...

491

Thermoelastic Generation of Ultrasound by Line-Focused Laser Irradiation  

E-Print Network [OSTI]

Thermoelastic Generation of Ultrasound by Line-Focused Laser Irradiation Irene Arias and Jan D 60208, USA Abstract A two-dimensional theoretical model for the field generated in the thermoelas- tic for the model. Some representative results are presented to illustrate the generated field and provide insight

Huerta, Antonio

492

Surface Properties of Photo-Oxidized Bituminous Coals: Final report  

SciTech Connect (OSTI)

Natural weathering has a detrimental effect on the hydrophobic nature of coal, which in turn can influence clean-coal recovery during flotation. Few techniques are available that can establish the quality of coal surfaces and that have a short analysis time to provide input for process control. Luminescence emissions which can be quantified with an optical microscope and photometer system, are measurably influenced by degree of weathering as well as by mild storage deterioration. In addition, it has been shown that when vitrinite is irradiated with a relatively high intensity flux of violet- or ultraviolet- light in the presence of air, photo-oxidation of the surface occurs. The combination of measuring the change in luminescence emission intensity with degree of surface oxidation provided the impetus for the current investigation. The principal aim of this research was to determine whether clear correlations could be established among surface oxygen functionality, hydrophobicity induced by photo-oxidation, and measurements of luminescence intensity and alteration. If successful, the project would result in quantitative luminescence techniques based on optical microscopy that would provide a measure of the changes in surface properties as a function of oxidation and relate them to coal cleanability. Two analytical techniques were designed to achieve these goals. Polished surfaces of vitrain bands or a narrow size fraction of powdered vitrain concentrates were photo-oxidized using violet or ultraviolet light fluxes and then changes in surface properties and chemistry were measured using a variety of near-surface analytical techniques. Results from this investigation demonstrate that quantitative luminescence intensity measurements can be performed on fracture surfaces of bituminous rank coals (vitrains) and that the data obtained do reveal significant variations depending upon the level of surface oxidation. Photo-oxidation induced by violet or ultraviolet light fluxes does result in a progressive and significant increase in the amount of near-surface oxygen concentration at about the same level regardless of bituminous coal rank. These incremental changes in oxygen concentration appear to lower the hydrophobicity as shown by contact angle measurements on polished surfaces. Although this influence diminished as coal rank increased, the level of oxygen uptake was about the same, suggesting that the type of oxygen functionality formed during oxidation may be of great importance in modifying surface hydrophobicity. Changes in functional-group chemistry, measured by a variety of near-surface techniques, showed a general increase in the concentration of carbonyl-containing groups while those of CH{sub 2} groups decreased. All of these observations follow the trends observed in previous investigations of naturally weathered coals. The photo-oxidation technique also resulted in the development of phenolic, ester and anhydride moieties instead of the expected emplacement of carboxylic acid groups which are normally associated with naturally weathered coals. The importance of this observation is that esters and anhydrides would result in a more hydrophobic surface in comparison to the more hydrophilic surface resulting from acid functionality. This observation is consistent with the results of film flotation of UV-irradiated powdered vitrain in which floatability was generally observed to increase with increasing photo- oxidation.

NONE

1998-09-01T23:59:59.000Z

493

Physically and chemically stable ionic liquid-infused textured surfaces showing excellent dynamic omniphobicity  

SciTech Connect (OSTI)

A fluorinated and hydrophobic ionic liquid (IL), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, effectively served as an advantageous lubricating liquid for the preparation of physically and chemically stable omniphobic surfaces based on slippery liquid-infused porous surfaces. Here, we used particulate microstructures as supports, prepared by the chemical vapor deposition of 1,3,5,7-tetramethylcyclotetrasiloxane and subsequent surface modification with (3-aminopropyl)triethoxysilane. Confirmed by SEM and contact angle measurements, the resulting IL-infused microtextured surfaces are smooth and not only water but also various low surface tension liquids can easily slide off at low substrate tilt angles of <5, even after exposure to high temperature, vacuum, and UV irradiation.

Miranda, Daniel F.; Urata, Chihiro; Masheder, Benjamin; Dunderdale, Gary J.; Hozumi, Atsushi, E-mail: a.hozumi@aist.go.jp [National Institute of Advanced Industrial Science and Technology (AIST), 2266-98, Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya, Aichi 463-8560 (Japan); Yagihashi, Makoto [Nagoya Municipal Industrial Research Institute, Rokuban, Atsuta-ku, Nagoya 456-0058 (Japan)

2014-05-01T23:59:59.000Z

494

SALTS AND RADIATION PRODUCTS ON THE SURFACE OF EUROPA  

SciTech Connect (OSTI)

The surface of Europa could contain the compositional imprint of an underlying interior ocean, but competing hypotheses differ over whether spectral observations from the Galileo spacecraft show the signature of ocean evaporates or simply surface radiation products unrelated to the interior. Using adaptive optics at the W. M. Keck Observatory, we have obtained spatially resolved spectra of most of the disk of Europa at a spectral resolution {approx}40 times higher than seen by the Galileo spacecraft. These spectra show a previously undetected distinct signature of magnesium sulfate salts on Europa, but the magnesium sulfate is confined to the trailing hemisphere and spatially correlated with the presence of radiation products like sulfuric acid and SO{sub 2}. On the leading, less irradiated, hemisphere, our observations rule out the presence of many of the proposed sulfate salts, but do show the presence of distorted water ice bands. Based on the association of the potential MgSO{sub 4} detection on the trailing side with other radiation products, we conclude that MgSO{sub 4} is also a radiation product, rather than a constituent of a Europa ocean brine. Based on ocean chemistry models, we hypothesize that, prior to irradiation, magnesium is primarily in the form of MgCl{sub 2}, and we predict that NaCl and KCl are even more abundant, and, in fact, dominate the non-ice component of the leading hemisphere. We propose observational tests of this new hypothesis.

Brown, M. E. [Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125 (United States); Hand, K. P., E-mail: mbrown@caltech.edu [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)

2013-04-15T23:59:59.000Z

495

Surface Water Quality Standards (Kansas)  

Broader source: Energy.gov [DOE]

This act states regulations for the quality of surface water in the state. It also states designated uses of classified surface waters, surface water quality criteria and an antidegradation policy...

496

Surface Water Management Areas (Virginia)  

Broader source: Energy.gov [DOE]

This legislation establishes surface water management areas, geographically defined surface water areas in which the State Water Control Board has deemed the levels or supply of surface water to be...

497

Dose characterization of the rad source 2400 x-ray irradiator  

E-Print Network [OSTI]

The RS 2400 irradiator has been looked to as a replacement for discontinued gamma irradiators. The RS 2400 has a cylindrical, rather than point, x-ray source, which yields higher dose rates. The irradiator unit allows the user to set the current...

Wagner, Jennifer Ann Koop

2009-05-15T23:59:59.000Z

498

Irradiation Studies of Optical Components CERN, ~ April 15-24, 2005  

E-Print Network [OSTI]

Irradiation Studies of Optical Components 43 2 5 1 CERN, ~ April 15-24, 2005 1 GeV proton beam 4 x, 2005Optical components #12;Irradiation summary ­ transmittance/reflectance measurements Activity right 10 15 proton Irradiation dose: equivalent to 40 pulses of 24 GeV proton beam Received radiation dose

McDonald, Kirk

499

Rapid degradation of CdSe/ZnS colloidal quantum dots exposed to gamma irradiation  

E-Print Network [OSTI]

- grade their optical properties. In this paper, we report on the effects of gamma irradiationRapid degradation of CdSe/ZnS colloidal quantum dots exposed to gamma irradiation Nathan J. Withers of 137 Cs gamma irradiation on photoluminescent properties of CdSe/ZnS colloidal quantum dots

New Mexico, University of

500

Thermally and optically stimulated processes in X-irradiated scheelite type crystals  

E-Print Network [OSTI]

Thermally and optically stimulated processes in X-irradiated scheelite type crystals M. Bohm, R at http://dx.doi.org/10.1051/jphyscol:19806132 #12;THbKMALLY AND OPTICALLY STIMULATED PROCESSES IN X-IRRADIATED and extrinsic) hole and electron centres are created by X-irradiation at liquid nitrogen temperature. Several

Paris-Sud XI, Université de