Powered by Deep Web Technologies
Note: This page contains sample records for the topic "5-cm period undulator" 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

Variable-Period Undulators for Synchrotron Radiation  

SciTech Connect (OSTI)

A new and improved undulator design is provided that enables a variable period length for the production of synchrotron radiation from both medium-energy and high energy storage rings. The variable period length is achieved using a staggered array of pole pieces made up of high permeability material, permanent magnet material, or an electromagnetic structure. The pole pieces are separated by a variable width space. The sum of the variable width space and the pole width would therefore define the period of the undulator. Features and advantages of the invention include broad photon energy tunability, constant power operation and constant brilliance operation.

Shenoy, Gopal; Lewellen, John; Shu, Deming; Vinokurov, Nikolai

2005-02-22T23:59:59.000Z

2

Configurations for short period rf undulators  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Several configurations for rf undulators energized at millimeter wavelengths and designed to produce coherent nanometer radiation from sub-GeV electron beams are analyzed and compared with one another. These configurations include a traveling-wave resonant ring, a standing wave resonator, and a resonator operating close to cutoff.

Kuzikov, S. V.; Jiang, Y.; Marshall, T. C.; Sotnikov, G. V.; Hirshfield, J. L.

2013-07-01T23:59:59.000Z

3

Cryogenic permanent magnet undulators  

Science Journals Connector (OSTI)

In order to obtain high magnetic fields in a short period undulator, superconductive undulators have been actively investigated in recent years. In this paper, however, we propose a new approach, the cryogenic permanent magnet undulator (CPMU) design, using permanent magnets at the cryogenic temperature of liquid nitrogen or higher. This cryogenic scheme can be easily adapted to currently existing in-vacuum undulators and it improves the magnetic field performance by 30%–50%. Unlike superconductive undulators operating around the liquid helium temperature, there is no big technological difficulty such as the thermal budget problem. In addition, existing field correction techniques are applicable to the CPMUs. Since there is no quench in the CPMUs, the operation of the CPMUs has the same reliability as conventional permanent magnet undulators.

Toru Hara; Takashi Tanaka; Hideo Kitamura; Teruhiko Bizen; Xavier Maréchal; Takamitsu Seike; Tsutomu Kohda; Yutaka Matsuura

2004-05-18T23:59:59.000Z

4

The U5. 0 Undulator for the ALS  

SciTech Connect (OSTI)

The U5.0 Undulator, an 89 period, 5 cm period length, 4.6 m long insertion device has been designed and is in fabrication. This undulator will be the first high brightness source, in the 50 to 1500 eV range, for the Advanced Light Source (ALS) and is scheduled for completion in 1992. A modular hybrid configuration utilizing Nd-Fe-B permanent magnet material and vanadium permendur is used that achieves 0.837 Tesla effective peak field. Correction of the vertical field integral is with permanent magnet rotors at the ends. Gap adjustment is with an arrangement of roller screws, chains drives, a gear reduction unit and a stepper motor driven by a closed loop control system. The vacuum chamber design is a two-piece, machined and welded 5083-H321 aluminum construction of 5.1 m length. Magnetic design, subsystem design and fabrication progress are presented. 12 refs., 4 figs., 2 tabs.

Hoyer, E.; Chin, J.; Halbach, K.; Hassenzahl, W.V.; Humphries, D.; Kincaid, B.; Lancaster, H.; Plate, D.

1991-05-01T23:59:59.000Z

5

LCLS CDR Chapter 8 - Undulator  

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

8 8 Undulator TECHNICAL SYNOPSIS The LCLS Undulator is made up of 33 individual undulator segments. Each undulator segment will be a permanent-magnet planar hybrid device with a period length of 30 mm and a fixed gap of nominally 6 mm. The actual gap will be adjusted as necessary to yield an effective K of 3.71. Each undulator segment is 3.42 m long, with 226 poles per jaw. The poles will be made of vanadium permendur and the magnets of a grade of NdFeB with a high intrinsic coercivity for better resistance to radiation-induced demagnetization. The electron beam will be focused by a separated function FODO lattice, using permanent-magnet quadrupoles placed between the undulator segments. These focusing or defocusing lenses will share the drift spaces between the

6

The JLAB UV Undulator  

SciTech Connect (OSTI)

Recently the JLAB FEL has demonstrated 150 W at 400 nm and 200 W at 700 nm using a 33mm period undulator designed and built by STI Optronics. This paper describes the undulator design and performance. Two key requirements were low phase error, zero steering and offset end fields and small rms trajectory errors. We will describe a new genetic algorithm that allowed phase error minimization to 1.8 degrees while exceeding specifications. The mechanical design, control system and EPICS interface will also be summarized.

Gottschalk, Steven C. [STI, Washington, USA; Benson, Steven V. [JLAB; Moore, Steven Wesley [JLAB

2013-05-01T23:59:59.000Z

7

Micropole undulator  

DOE Patents [OSTI]

Micropole undulators for use in the generation of x-rays from moving charged particles are disclosed. Two rows of spaced apart poles are arranged so that each pole produces a magnetic field aligned with all other similar fields. The poles are the ends of C''-shaped magnets. In each row, adjacent poles are separated by spacers made of a superconducting material. 11 figs.

Tatchyn, R.O.; Csonka, P.L.; Cremer, J.T.

1990-12-11T23:59:59.000Z

8

On-axis brilliance and power of in-vacuum undulators for the Advanced Photon Source.  

SciTech Connect (OSTI)

A request for studying the spectral performance of in-vacuum undulators (IVUs) for the APS storage ring was recently put forward. In-vacuum undulators are prevalent at other synchrotron radiation facilities such as the ESRF and the Spring-8. However, they never made it into the arsenal of undulators at the APS because the brilliance tuning curves were sufficiently wide due to the fact that the undulator minimum gap could be set as low as 10.5 mm. For sector 3, which in the past used a narrow-gap vacuum chamber, the minimum undulator pole gap was allowed to be set as low as 8.5 mm, providing contiguous tuning curves between the first and third harmonic radiation for a 2.7-cm-period device. (Subsequently, the narrow-gap vacuum chamber was removed and replaced with a standard vacuum chamber, which allows a minimum gap of 10.5 mm.) For sector 4, which currently holds the only narrow-gap vacuum chamber at the APS, the minimum gap is 9.5 mm. In this sector, a permanent magnet hybrid undulator with SmCo magnets is used instead of NdFeB magnets because of their higher radiation resistance and their better protection against radiation-induced demagnetization of the magnets. In the realm of looking to the future, new concepts and technologies are being revisited. Most notable is the superconducting undulator (SCU) technology, which provides the ultimate highest magnetic field of any technology and design. The SCU program has been ongoing at the APS for several years and substantial progress has been made.3,4 However, the in-vacuum undulators may bridge some of the user demands, and it is therefore worthwhile revisiting their potential at the APS. In this work, the following were assumed or required: (1) the smallest in-vacuum beam-stay-clear gap is 5.0 mm, (2) a beam-liner of 2 x 0.060 mm, which increases the pole gap by the same amount, (3) both NdFeB and SmCo magnets shall be studied, even though SmCo magnets are the preferred choice for very small gaps, (4) compare the in-vacuum undulators with superconducting NbTi undulators with a wall thickness/space of 2 x 1.0 mm, and (5) all undulators will have an effective magnetic length of 2.4 m. Three short undulator period lengths were chosen somewhat arbitrary and studied. We will compare the performance of undulators with period lengths of 2.5 cm and 2.0 cm to one with a 1.6-cm period, which is the chosen period length of the first designed and tested short-length SCU for the APS. Additionally, we will make comparisons with the undulator A, which has a period length of 3.3 cm.

Dejus, R.; Jaski, M.; Kim, S. H.; Accelerator Systems Division (APS)

2009-11-25T23:59:59.000Z

9

The Optimized Design of Undulators for the HiSOR Users Experiments  

SciTech Connect (OSTI)

The HiSOR is a small racetrack type storage ring aiming for usage of synchrotron radiation. This ring is equipped with two undulators. One of them is a linear undulator and another is a helical one. These undulators serve high-flux VUV photon beams. Therefore, these beamlines are oversubscribed mainly for the high precision photo-electron spectroscopy experiments to investigate various materials. To solve this problem, we investigated possibilities to replace present undulators and beamline optics to those with better performance. One of such candidate undulator beamlines is a two-branch-beamline with a single elliptical undulator. Another candidate is a beamline equipped with a quasi-periodic undulator.

Sasaki, S.; Miyamoto, A.; Namatame, H.; Taniguchi, M. [Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, Hiroshima (Japan)

2010-06-23T23:59:59.000Z

10

Progress on a Superconducting Planar Undulator in the UK  

SciTech Connect (OSTI)

Superconducting (SC) undulators can potentially reach a higher field, for short period devices, than permanent magnet devices. The latest design work on a proposed superconducting planar undulator being designed in the UK by the STFC is presented. The initial layout of the undulator, including superconducting fill factor and the cryogenic system is presented. Calculations of the wakefield heating effects due to different vacuum vessels and electron beam configurations are also presented. Another important issue for superconducting planar undulators is the effect of engineering tolerances of the pole pieces: the computer simulated effects, for different size pole errors, on the electron beam trajectory and phase error through the device are also shown.

Scott, D. J.; Clarke, J. A. [ASTeC, Daresbury Laboratory, STFC, Warrington, Cheshire (United Kingdom); Baynham, E.; Bradshaw, T.; Brummitt, A.; Burton, G.; Carr, S.; Hills, M.; Lintern, A.; Rochford, J.; Taylor, O.; Watson, S. [Rutherford Appleton Laboratory, STFC, Didcot, Oxfordshire (United Kingdom)

2010-06-23T23:59:59.000Z

11

TESTING AND PERFORMANCE ANALYSIS OF NASA 5 CM BY 5 CM BI-SUPPORTED SOLID OXIDE ELECTROLYSIS CELLS OPERATED IN BOTH FUEL CELL AND STEAM ELECTROLYSIS MODES  

SciTech Connect (OSTI)

A series of 5 cm by 5 cm bi-supported Solid Oxide Electrolysis Cells (SOEC) were produced by NASA for the Idaho National Laboratory (INL) and tested under the INL High Temperature Steam Electrolysis program. The results from the experimental demonstration of cell operation for both hydrogen production and operation as fuel cells is presented. An overview of the cell technology, test apparatus and performance analysis is also provided. The INL High Temperature Steam Electrolysis laboratory has developed significant test infrastructure in support of single cell and stack performance analyses. An overview of the single cell test apparatus is presented. The test data presented in this paper is representative of a first batch of NASA's prototypic 5 cm by 5 cm SOEC single cells. Clearly a significant relationship between the operational current density and cell degradation rate is evident. While the performance of these cells was lower than anticipated, in-house testing at NASA Glenn has yielded significantly higher performance and lower degradation rates with subsequent production batches of cells. Current post-test microstructure analyses of the cells tested at INL will be published in a future paper. Modification to cell compositions and cell reduction techniques will be altered in the next series of cells to be delivered to INL with the aim to decrease the cell degradation rate while allowing for higher operational current densities to be sustained. Results from the testing of new batches of single cells will be presented in a future paper.

R. C. O'Brien; J. E. O'Brien; C. M. Stoots; X. Zhang; S. C. Farmer; T. L. Cable; J. A. Setlock

2011-11-01T23:59:59.000Z

12

NSLS prototype small-gap undulator (PSGU)  

SciTech Connect (OSTI)

The NSLS Prototype Small-Gap Undulator (PSGU) will serve as a tool to study lifetime degradation and the onset of beam instabilities as the beam duct aperture is decreased. The device will consist of variable-gap vacuum vessel had a permanent magnet undulator, with independent magnet-gap control. The vacuum vessel design attempts to minimize both residual gas pressures and beam impedances. The undulator will be 320 mm long and utilizes a pure-permanent-magnet structure with 6 blocks per 16 mm period. For a nominal operating aperture of 4 mm, PSGU will produce a peak brightness in the fundamental and third harmonic of 7 {times} 10{sup 16} and 1 {times} 10{sup 16} photons{sm bullet}sec{sup {minus}1}{sm bullet}mrad{sup {minus}2}mm{sup {minus}2}{sm bullet}(0.1% BW){sup {minus}1} at photon energies of 2.5 keV and 7.5 keV, respectively. 5 refs., 3 figs., 2 tabs.

Stefan, P.M.; Solomon, L.; Krinsky, S. (Brookhaven National Lab., Upton, NY (United States)); Rakowsky, G. (Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.)

1991-01-01T23:59:59.000Z

13

Planar Undulator Considerations rw2  

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

5 5 July 2002 Planar Undulator Considerations John C. Sheppard Stanford Linear Accelerator Center Stanford University Menlo Park, California Abstract: This note consists of informal working notes that document an effort to understand the TESLA baseline, unpolarized, undulator based positron source. This is the first step in the design process of an undulator based positron system for the NLC. The expressions and methodologies developed herein are used in subsequent memos that reference this note. In regards to the TESLA design, it is found that a 135 m long (versus 100 m length) undulator is consistent with the performance descriptions in the TDR text. And while operation of the TESLA system with a 250 GeV drive beam energy provides a safety margin of a factor of 2

14

U10.0 Undulator conceptual design report  

SciTech Connect (OSTI)

The U10.0 Undulator described here is a 43 period, 10 cm period, 4.5 meter long insertion device. Designed for the Advanced Light Source (ALS) storage ring at the Lawrence Berkeley Laboratory. This insertion device will provide high brightness, quasi-monochromatic radiation in the 5-950 eV energy range. This conceptual design report includes sections on: parameter development, spectral performance, and accelerator requirements, physics specifications and the detailed conceptual design of the magnetic structure, the support/drive systems, the insertion device control system, the vacuum system, and installation for the U10.0 Undulator.

Hoyer, E.

1994-06-01T23:59:59.000Z

15

Electron Beam Alignment Strategy in the LCLS Undulators  

SciTech Connect (OSTI)

The x-ray FEL process puts very tight tolerances on the straightness of the electron beam trajectory (2 {micro}m rms) through the LCLS undulator system. Tight but less stringent tolerances of 80 {micro}m rms vertical and 140 {micro}m rms horizontally are to be met for the placement of the individual undulator segments with respect to the beam axis. The tolerances for electron beam straightness can only be met through beam-based alignment (BBA) based on electron energy variations. Conventional alignment will set the start conditions for BBA. Precision-fiducialization of components mounted on remotely adjustable girders and the use of beam-finder wires (BFW) will satisfy placement tolerances. Girder movement due to ground motion and temperature changes will be monitored continuously by an alignment monitoring system (ADS) and remotely corrected. This stabilization of components as well as the monitoring and correction of the electron beam trajectory based on BPMs and correctors will increase the time between BBA applications. Undulator segments will be periodically removed from the undulator Hall and measured to monitor radiation damage and other effects that might degrade undulator tuning.

Nuhn, H.-D.; Emma, P.J.; Gassner, G.L.; LeCocq, C.M.; Peters, E.; Ruland, R.E.; /SLAC

2007-01-03T23:59:59.000Z

16

Development of a circularly polarizing microscope with a polarizing undulator  

Science Journals Connector (OSTI)

A circularly polarizing microscope by which we intend to obtain images with CD (circular dichroism) or CIDS (circular intensity differential scattering) in order to observe the structure and distribution of biomolecules has been constructed by using a polarizing undulator as the polarizing light source. The polarizing undulator with crossed and retarded magnetic field having fifteen periods was installed in the electron storage ring NIJI?II in the Electrotechnical Laboratory. A Schwarzschild?type mirror system combined with a convex mirror was developed in order to focus the undulator radiation to a microbeam keeping the quality of polarization of the radiation from the undulator. The beam size was from 0.66 ?m (at wavelength 200 nm) to 0.96 ?m (at 400 nm). Using a scanning sample stage and a photomultiplier which was positioned in the back of the sample some images with transmitted and scattered light from fibrous DNA have been obtained. Attempts have also been made at obtaining images with CD and CIDS from the alternation between right? and left?handed circularly polarized radiation from the undulator.

Toru Yamada; Masatada Yuri; Hideo Onuki; Shozo Ishizaka

1995-01-01T23:59:59.000Z

17

The U5. 0 undulator design for the advanced light source at LBL  

SciTech Connect (OSTI)

The U5.0 undulator, currently under design, is the first in a series of insertion devices planned for the Advanced Light Source at LBL. U5.0 parameters include a 5 cm period, 5 m length with a 0.837 T maximum field at a 14 mm gap. A hybrid configuration utilizing Nd-Fe-B permanent magnet material and Vanadium Permendur poles is used for the magnetic structure. Construction is modular with many pole assemblies attached to a pole mount, which in turn is fastened onto one of the backing beams. Vertical field integral correction at the ends is with permanent magnet rotators. The supports structure features a 4-post configuration, a rigid base with 3 kinematic floor supports and 2 rigid 5 m long backing beams that fit within the 2.4 m high accelerator enclosure. The drive system is computer controlled utilizing a stepper motor and shaft encode coupled to a roller-screw/nut and chain drive train. Vacuum chamber design is a rigid configuration with a 10 mm vertical by 218 mm horizontal aperture of 5.5 m length. Chamber fabrication features a two-piece welded chamber of 5083 H321 aluminum. Pumping is with ion and titanium sublimation pumps. 5 figs., 1 tab.

Hoyer, E.; Chin, J.; Halbach, K.; Hassenzahl, W.; Humphries, D.; Kincaid, B.; Lancaster, H.; Plate, D.; Savoy, R.

1989-08-01T23:59:59.000Z

18

Magnetic property of a staggered-array undulator using a bulk high-temperature superconductor  

Science Journals Connector (OSTI)

The magnetic field of a staggered-array undulator using a bulk high-temperature superconductor is calculated by analytical and numerical methods. Analytical formulas for the undulator field and the solenoid field required to generate the undulator field are derived from a simple two-dimensional model. The analytical calculation shows the degree of dependence of these fields on the undulator parameters, the generation of a high undulator field proportional to the critical current density of the bulk superconductor, and the good tunability of the undulator field over a wide range of values. The numerical calculation is performed in a three-dimensional geometry by two methods: the center field and energy minimization methods. The latter treats the current distribution inside the bulk, whereas the former neglects it as a natural extension of the analytical model. The calculation also reveals the dependence of the fields on the undulator parameters arising from the current distribution. From the comparison with experimental results, we find that the latter method reproduces the experimental results well, which indicates the importance of the current distribution inside the bulk. Therefore, we derive a semiempirical formula for the required solenoid field by modifying the analytical formula using the numerical results so as to include the effect of the current distribution. The semiempirical formula reproduces the numerical result with an error of 3%. Finally, we estimate the magnetic performance of the undulator as an example of using the formulas and values presented in this paper. The estimation shows that an undulator field twice as large as that of the present in-vacuum undulator but with an equal period and gap can be obtained at a temperature of approximately 20–40 K, and that deflection parameters (K values) of 1 and 2 can be achieved with periods of 5 and 10 mm at approximately 4–20 K.

Ryota Kinjo; Kenta Mishima; Yong-Woon Choi; Mohamed Omer; Kyohei Yoshida; Hani Negm; Konstantin Torgasin; Marie Shibata; Kyohei Shimahashi; Hidekazu Imon; Kensuke Okumura; Motoharu Inukai; Heishun Zen; Toshiteru Kii; Kai Masuda; Kazunobu Nagasaki; Hideaki Ohgaki

2014-02-26T23:59:59.000Z

19

Mass Transfer Testing of a 12.5-cm Rotor Centrifugal Contactor  

SciTech Connect (OSTI)

TRUEX mass transfer tests were performed using a single stage commercially available 12.5 cm centrifugal contactor and stable cerium (Ce) and europium (Eu). Test conditions included throughputs ranging from 2.5 to 15 Lpm and rotor speeds of 1750 and 2250 rpm. Ce and Eu extraction forward distribution coefficients ranged from 13 to 19. The first and second stage strip back distributions were 0.5 to 1.4 and .002 to .004, respectively, throughout the dynamic test conditions studied. Visual carryover of aqueous entrainment in all organic phase samples was estimated at < 0.1 % and organic carryover into all aqueous phase samples was about ten times less. Mass transfer efficiencies of = 98 % for both Ce and Eu in the extraction section were obtained over the entire range of test conditions. The first strip stage mass transfer efficiencies ranged from 75 to 93% trending higher with increasing throughput. Second stage mass transfer was greater than 99% in all cases. Increasing the rotor speed from 1750 to 2250 rpm had no significant effect on efficiency for all throughputs tested.

D. H. Meikrantz; T. G. Garn; J. D. Law; N. R. Mann; T. A. Todd

2008-09-01T23:59:59.000Z

20

HYBRID UNDULATORS AND WIGGLERS LS-18 S.H. Kim  

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

HYBRID UNDULATORS AND WIGGLERS HYBRID UNDULATORS AND WIGGLERS LS-18 S.H. Kim March 22, 1985 FOR. THE ALADDIN SYNCHROTRON LIGHT SOURCE In this note, design parameters of two hybrid undulators and one hybrid wiggler are considered with a minimum gap of 1.25 cm. The length of the insertion devices considered here is 3.5 m. The magnetic field along the axis of the hybrid devices of samarium-cobalt permanent magnets and vanadium per- mendur pole tips is expressed as: -f- (5.47 - 1.80 g/A u ) B 3.3 x 0.90 e u where Au and g are the undulator period and gap, and a filling or assembly factor of 90% is assumed. Figure 1 shows the deflection parameter K vs gap for three insertion devices (see the names). The parameters used in this note are marked as " 1 circles in Fig. * In Figs. 2 and 3, the first few harmonics of the spectral brilliance of

Note: This page contains sample records for the topic "5-cm period undulator" 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

LCLS Undulator Quadrupole Fiducialization Plan  

SciTech Connect (OSTI)

This note presents the fiducialization plan for the LCLS undulator quadrupoles. The note begins by summarizing the requirements for the fiducialization. A discussion of the measurement equipment is presented, followed by the methods used to perform the fiducialization and check the results. This is followed by the detailed fiducialization plan in which each step is enumerated. Finally, the measurement results and data storage formats are presented. The LCLS is made up of 33 assemblies consisting of an undulator, quadrupole, beam finder wire, and other components mounted on a girder. The components must be mounted in such a way that the beam passes down the axis of each component. In this note, we describe how the ideal beam axis is related to tooling balls on the quadrupole. This step, called fiducialization, is necessary because the ideal beam axis is determined magnetically, whereas tangible objects must be used to locate the quadrupole. The note begins with the list of fiducialization requirements. The laboratory in which the work will be performed and the relevant equipment is then briefly described. This is followed by a discussion of the methods used to perform the fiducialization and the methods used to check the results. A detailed fiducialization plan is presented in which all the steps of fiducialization are enumerated. A discussion of the resulting data files and directory structure concludes the note.

Wolf, Zachary; Levashov, Michael; Lundahl, Eric; Reese, Ed; LeCocq, Catherine; Ruland, Robert; /SLAC; ,

2010-11-24T23:59:59.000Z

22

A Far-infrared Undulator for Coherent Synchrotron Radiation and Free Electron Laser at Tohoku University  

SciTech Connect (OSTI)

In order to develop an intense far-infrared radiation source, a high quality electron beam has been studied at Tohoku University, Sendai. The bunch length of the beam expected is very much shorter than terahertz (THz) wavelength, so that coherent spontaneous emission of synchrotron radiation will be a promising high brilliant far-infrared source. An undulator consisting of permanent magnets has been designed in which optional free electron laser (FEL) will be operated in free space mode. Consequently the minimum gap of the undulator is decided to be 54 mm for 0.36 mm radiation to avoid diffraction loss, and then the period length of 10 cm is employed. The undulator may cover a wavelength range from 0.18 to 0.36 mm with the beam energy of 17 MeV. Property of coherent THz radiation from the undulator and possibility of novel pre-bunched THz FEL is discussed.

Hama, Hiroyuki; Hinode, Fujio; Kawai, Masayuki; Nanbu, Kenichi; Miyahara, Fusashi; Yasuda, Mafuyu [Laboratory of Nuclear Science, Tohoku University School of Science, 1-2-1 Mikamine, Taihaku-ku, Sendai 982-0826 (Japan)

2010-06-23T23:59:59.000Z

23

Start-to-end global imaging as a sunward propagating, SAPS-associated giant undulation event  

SciTech Connect (OSTI)

We present high-time resolution global imaging of a sunward propagating giant undulation event from start to finish. The event occurred on November 24, 2001 during a very disturbed storm interval. The giant undulations began to develop at around 13UT and persisted for approximately 2 hours. The sunward propagation speed was on the order of 0.6 km/s (relative to SM coordinate system). The undulations had a wavelength of {approx} 750 km, amplitudes of {approx} 890 km and produced ULF pulsations on the ground with a period of {approx} 1108s. We show that the undulations were associated with SAPs flows that were caused by the proton plasma sheet penetrating substantially farther Earthward than the electron plasma sheet on the duskside. The observations appear to be consistent with the development of a shear flow and/or ballooning type of instability at the plasmapause driven by intense SAPS-associated shear flows.

Henderson, Michael G [Los Alamos National Laboratory; Donovan, Eric F [U OF CALGARY; Foster, John C [MIT; Mann, Ian R [UNIV OF ALBERTA; Immel, Thomas J [UC/BERKELEY; Mende, Stephen B [UN/BERKELEY; Sigwarth, John B [NASA/GSFC

2009-01-01T23:59:59.000Z

24

Figure 2: The mercury jet target geometry. The proton beam and mercury jet cross at z=-37.5 cm.  

E-Print Network [OSTI]

Figure 2: The mercury jet target geometry. The proton beam and mercury jet cross at z=-37.5 cm. Figure 3: The layout of multiple proton beam entry directions relative to mercury jet at z=-75 cm. A PION of a free liquid mercury jet with an intense proton beam. We study the variation of meson production

McDonald, Kirk

25

Algorithms to Automate LCLS Undulator Tuning  

SciTech Connect (OSTI)

Automation of the LCLS undulator tuning offers many advantages to the project. Automation can make a substantial reduction in the amount of time the tuning takes. Undulator tuning is fairly complex and automation can make the final tuning less dependent on the skill of the operator. Also, algorithms are fixed and can be scrutinized and reviewed, as opposed to an individual doing the tuning by hand. This note presents algorithms implemented in a computer program written for LCLS undulator tuning. The LCLS undulators must meet the following specifications. The maximum trajectory walkoff must be less than 5 {micro}m over 10 m. The first field integral must be below 40 x 10{sup -6} Tm. The second field integral must be below 50 x 10{sup -6} Tm{sup 2}. The phase error between the electron motion and the radiation field must be less than 10 degrees in an undulator. The K parameter must have the value of 3.5000 {+-} 0.0005. The phase matching from the break regions into the undulator must be accurate to better than 10 degrees. A phase change of 113 x 2{pi} must take place over a distance of 3.656 m centered on the undulator. Achieving these requirements is the goal of the tuning process. Most of the tuning is done with Hall probe measurements. The field integrals are checked using long coil measurements. An analysis program written in Matlab takes the Hall probe measurements and computes the trajectories, phase errors, K value, etc. The analysis program and its calculation techniques were described in a previous note. In this note, a second Matlab program containing tuning algorithms is described. The algorithms to determine the required number and placement of the shims are discussed in detail. This note describes the operation of a computer program which was written to automate LCLS undulator tuning. The algorithms used to compute the shim sizes and locations are discussed.

Wolf, Zachary

2010-12-03T23:59:59.000Z

26

Fast pulsed excitation wiggler or undulator  

DOE Patents [OSTI]

A fast pulsed excitation, electromagnetic undulator or wiggler, employing geometrically alternating substacks of thin laminations of ferromagnetic material, together with a single turn current loop excitation of the composite assembly, of such shape and configuration that intense, spatially alternating, magnetic fields are generated; for use as a pulsed mode undulator or wiggler radiator, for use in a Free Electron Laser (FEL) type radiation source or, for use in an Inverse Free Electron Laser (IFEL) charged particle accelerator.

van Steenbergen, Arie (Shoreham, NY)

1990-01-01T23:59:59.000Z

27

Low local recurrence rate without postmastectomy radiation in node-negative breast cancer patients with tumors 5 cm and larger  

SciTech Connect (OSTI)

Purpose: To assess the need for adjuvant radiotherapy following mastectomy for patients with node-negative breast tumors 5 cm or larger. Methods and Materials: Between 1981 and 2002, a total of 70 patients with node-negative breast cancer and tumors 5 cm or larger were treated with mastectomy and adjuvant systemic therapies but without radiotherapy at three institutions. We retrospectively assessed rates and risk factors for locoregional failure (LRF), overall survival (OS), and disease-free survival (DFS) in these patients. Results: With a median follow-up of 85 months, the 5-year actuarial LRF rate was 7.6% (95% confidence interval, 3%-16%). LRF was primarily in the chest wall (4/5 local failures), and lymphatic-vascular invasion (LVI) was statistically significantly associated with LRF risk by the log-rank test (p = 0.017) and in Cox proportional hazards analysis (p 0.038). The 5-year OS and DFS rates were 83% and 86% respectively. LVI was also significantly associated with OS and DFS in both univariate and multivariate analysis. Conclusions: This series demonstrates a low LRF rate of 7.6% among breast cancer patients with node-negative tumors 5 cm and larger after mastectomy and adjuvant systemic therapy. Our data indicate that further adjuvant radiation therapy to increase local control may not be indicated by tumor size alone in the absence of positive lymph nodes. LVI was significantly associated with LRF in our series, indicating that patients with this risk factor require careful consideration with regard to further local therapy.

Floyd, Scott R. [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Harvard Radiation Oncology Program, Harvard Medical School, Boston, MA (United States); Buchholz, Thomas A. [Department of Radiation Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX (United States); Haffty, Bruce G. [Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT (United States); Goldberg, Saveli [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Niemierko, Andrzej [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Raad, Rita Abi [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Oswald, Mary J. [Department of Radiation Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX (United States); Sullivan, Timothy [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Strom, Eric A. [Department of Radiation Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX (United States); Powell, Simon N. [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Katz, Angela [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Taghian, Alphonse G. [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States)]. E-mail: ataghian@partners.org

2006-10-01T23:59:59.000Z

28

Hydraulic and Clean-in-Place Evaluations for a 12.5-cm Annular Centrifugal Contactor at INL  

SciTech Connect (OSTI)

Hydraulic and Clean-in-Place Evaluations for a 12.5 cm Annular Centrifugal Contactor at the INL Troy G. Garn, Dave H. Meikrantz, Nick R. Mann, Jack D. Law, Terry A. Todd Idaho National Laboratory Commercially available, Annular Centrifugal Contactors (ACC) are currently being evaluated for processing dissolved nuclear fuel solutions to selectively partition integrated elements using solvent extraction technologies. These evaluations include hydraulic and clean-in-place (CIP) testing of a commercially available 12.5 cm unit. Data from these evaluations is used to support design of future nuclear fuel reprocessing facilities. Hydraulic testing provides contactor throughput performance data on two-phase systems for a wide range of operating conditions. Hydraulic testing results on a simple two-phase oil and water system followed by a 30 % Tributyl phosphate in N-dodecane / nitric acid pair are reported. Maximum total throughputs for this size contactor ranged from 20 to 32 liters per minute without significant other phase carryover. A relatively new contactor design enhancement providing Clean-in-Place capability for ACCs was also investigated. Spray nozzles installed into the central rotor shaft allow the rotor internals to be cleaned, offline. Testing of the solids capture of a diatomaceous earth/water slurry feed followed by CIP testing was performed. Solids capture efficiencies of >95% were observed for all tests and short cold water cleaning pulses proved successful at removing solids from the rotor.

Troy G. Garn; David H. Meikrantz; Nick R. Mann; Jack D. Law; Terry A. Todd

2008-09-01T23:59:59.000Z

29

Optical Fibre Dosimeter for SASE FEL Undulators  

E-Print Network [OSTI]

Single pass Free Electron Lasers (FELs) based on self-amplified spontaneous emission (SASE) are developed for high brightness and short wavelength applications. They use permanent magnet undulators which are radiation sensitive devices. During accelerator commissioning beam losses can appear anywhere along the undulator line. To avoid damage of the permanent magnets due to radiation, an optical fibre dosimeter system can be used. The increase of absorption caused by ionizing radiation is measured in radiation sensitive optical fibers. The dose system enables relatively fast particle loss tuning during accelerator operation and allows the monitoring of the accumulated dose. Dose measurements in narrow gaps which are inaccessible for any other (online) dosimeter type become possible. The electromagnetic insensitivity of optical fibre sensor is an advantage of applications in strong magnetic undulator fields. At each location the light absorption is measured by using an optical power-meter. The dynamic range is ...

Körfer, M

2003-01-01T23:59:59.000Z

30

Development of the Short Gap Undulators at the Photon Factory, KEK  

SciTech Connect (OSTI)

Very short-period and in-vacuum type undulators have been developed and installed in the 2.5-GeV Photon Factory storage ring, which was upgraded to enhance the straight sections for insertion devices in 2005. X rays ranging from 2 keV to 15 keV are covered by these undurators with their lower harmonics.

Yamamoto, Shigeru; Tsuchiya, Kimichika; Sasaki, Hiroyuki; Aoto, Tomohiro [Photon Factory, High Energy Accelerator Research Organization, KEK Oho, Tsukuba, Ibaraki 305-0801 (Japan); Department of Materials Structure Science, Graduate University for Advanced Studies, Oho, Tsukuba, Ibaraki 305-0801 (Japan); Shioya, Tatsuro [Photon Factory, High Energy Accelerator Research Organization, KEK Oho, Tsukuba, Ibaraki 305-0801 (Japan)

2010-06-23T23:59:59.000Z

31

UNDULATOR TUNABILITY AND RING-ENERGY P. J. Viccaro and G. K. Shenoy  

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

Introduction Introduction UNDULATOR TUNABILITY AND RING-ENERGY P. J. Viccaro and G. K. Shenoy LS-73 An Undulator has two properties which make it an extremely attractive source of electromagnetic radiation.[l] The first is that the radiation is concentrated in a number of narrow energy bands known as harmonics of the device. The second characteristic is that under favorable operating conditions, the energy of these harmonics can be shifted or "tuned" over an energy interval which can be as large-as two or three times the value of the lowest energy harmonic. Both the photon energy of an undulator as well as its tunability are determined by the period, A, of the device, the magnetic gap, G (which is larger than the minimum aperture required for injection and operation of the storage

32

Strong permanent magnet-assisted electromagnetic undulator  

DOE Patents [OSTI]

This invention discloses an improved undulator comprising a plurality of electromagnet poles located along opposite sides of a particle beam axis with alternate north and south poles on each side of the beam to cause the beam to wiggle or undulate as it travels generally along the beam axis and permanent magnets spaced adjacent the electromagnetic poles on each side of the axis of said particle beam in an orientation sufficient to reduce the saturation of the electromagnet poles whereby the field strength of the electromagnet poles can be increased beyond the normal saturation levels of the electromagnetic poles.

Halbach, Klaus (Berkeley, CA)

1988-01-01T23:59:59.000Z

33

Helical Undulator Radiation(LCC-0095)  

SciTech Connect (OSTI)

Expressions for the energy spectrum, photon number spectrum, and polarization of radiation emitted from a helical undulator are presented. Photon number normalization is discussed. The effect of angular collimation of the radiation is shown. Matlab script files used in the calculations are listed. Algorithms of what is actually calculated are documented.

Sheppard, J

2003-10-07T23:59:59.000Z

34

Performance of Saga-University Beamline with Planer Undulator  

SciTech Connect (OSTI)

A planer undulator consisted of 24 periods of an 85-mm length has been installed in a 2.7-m straight section of the SAGA-LS, in order to provide brilliant soft x-rays for advanced researches on nano-surfaces and interfaces at the Saga-university beamline BL13. The photon flux of 2x10{sup 11} photons/100 mA was obtained at 133 eV, and the available photon energy was beyond 800 eV using higher harmonics. The achieved resolving power of the varied-line-spacing (VLS) monochromator system was 8,670 at 130 eV with slits of 15 um. This agrees very well with the value of 8,790 expected from the ray-tracing calculation. The details in the performance tests will be reported, indicating the high performance of the beamline BL13 for photoelectron spectroscopy in the soft x-ray region.

Azuma, J.; Takahashi, K.; Kamada, M. [Synchrotron Light Application Center, Saga University, Saga 840-8502 (Japan); Ohkuma, H. [Japan Synchrotron Radiation Research Institute, Sayo-gun, Hyogo 679-5198 (Japan); Yamamoto, S. [High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801 (Japan)

2010-06-23T23:59:59.000Z

35

Undulations from amplified low frequency surface waves  

SciTech Connect (OSTI)

We study the linear scattering of gravity waves in longitudinal inhomogeneous stationary flows. When the flow becomes supercritical, it is known that counterflow propagating shallow waves are blocked and converted into deep waves. Here we show that in the zero-frequency limit, the reflected waves are amplified in such a way that the free surface develops an undulation, i.e., a zero-frequency wave of large amplitude with nodes located at specific places. This amplification involves negative energy waves and implies that flat surfaces are unstable against incoming perturbations of arbitrary small amplitude. The relation between this instability and black hole radiation (the Hawking effect) is established.

Coutant, Antonin, E-mail: antonin.coutant@aei.mpg.de [Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Am Muhlenberg 1, 14476 Golm (Germany)] [Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Am Muhlenberg 1, 14476 Golm (Germany); Parentani, Renaud, E-mail: renaud.parentani@th.u-psud.fr [Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay Cedex (France)] [Laboratoire de Physique Théorique, CNRS UMR 8627, Bâtiment 210, Université Paris-Sud 11, 91405 Orsay Cedex (France)

2014-04-15T23:59:59.000Z

36

Results of beam-based alignment in undulator section  

E-Print Network [OSTI]

(masking incoming dispersion) and correct up to now: step 1 done, step 2 (only vert. plane) #12;Procedure and photons so that the SASE process can take place in the whole undulator section #12;BBA in undulator: steps generated by quads #12;horizontal vertical Technical Note 05-04 #12;red: Soll position of quads black: Ist

37

CONSIDERATIONS IN THE DESIGN OF UNDULATORS L. C. Teng A. Relevant Radiation Formulas  

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

CONSIDERATIONS IN THE DESIGN OF UNDULATORS CONSIDERATIONS IN THE DESIGN OF UNDULATORS L. C. Teng A. Relevant Radiation Formulas LS-66 July 28, 1986 (1) The midplane field in an undu1ator is given approximately by where y = s = t Bo = coordinate in coordinate in B (s) Y direction direction undu1ator period length peak field of gap of beam The orbit wiggles in the transverse direction x perpendicular to y and s, and is given by where d prime = Ts x' = 2;P cos (2~ t) - x~ cos (2~ ~) o Po = }- (rigidity, Bp = ~ p, of beam). o The deflection parameter K is defined by x' K max. wiggle angle 0 = ~ - radiation angle - l/y 2~po where Y is the particle energy in rest energy, mc 2 , units. A device '" with K > 10 for which the radiation spectrum is more-or-1ess continuous is

38

Tapering studies for Terawatt level X-ray FELs with a superconducting undulator  

E-Print Network [OSTI]

We study the tapering optimization scheme for a short period, less than two cm, superconducting undulator, and show that it can generate 4 keV X-ray pulses with peak power in excess of 1 terawatt, using LCLS electron beam parameters. We study the e?ect of undulator module length relative to the FEL gain length for continous and step-wise taper pro?les. For the optimal section length of 1.5m we study the evolution of the FEL process for two di?erent superconducting technologies NbTi and Nb3Sn. We discuss the major factors limiting the maximum output power, particle detrapping around the saturation location and time dependent detrapping due to generation and ampli?cation of sideband modes.

Emma, Claudio; Emma, Paul; Huang, Zhirong; Pellegrini, Claudio

2015-01-01T23:59:59.000Z

39

Racking Up the LCLS Undulator Controls  

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

Looking into the Solar Wind Looking into the Solar Wind Board of Governors Awards Tim Fister Earns Henderson Prize from University of Washington Challenge Met as APS Sends Final Chambers to LCLS A Marriage of Hardware and Hard Work APS News Archives: 2012 | 2011 | 2010 | 2009 2008 | 2007 | 2006 | 2005 2004 | 2003 | 2002 | 2001 2000 Subscribe to APS News rss feed Racking Up the LCLS Undulator Controls JUNE 19, 2008 Bookmark and Share Argonne expertise will once again be in the spotlight when the Linac Coherent Light Source (LCLS), the U.S. Department of Energy's next-generation, x-ray free-electron laser light source, enables frontier materials and biological research at the Stanford Linear Accelerator Center (SLAC) beginning in 2009. Scientists, engineers, and technicians at the Argonne Advanced Photon Source (APS), together with co-workers from other

40

UNDULATOR-BASED LASER WAKEFIELD ACCELERATOR ELECTRON BEAM DIAGNOSTIC  

SciTech Connect (OSTI)

to couple the THUNDER undulator to the LOASIS Lawrence Berkeley National Laboratory (LBNL) laser wakefield accelerator (LWFA). Currently the LWFA has achieved quasi-monoenergetic electron beams with energies up to 1 GeV. These ultra-short, high-peak-current, electron beams are ideal for driving a compact XUV free electron laser (FEL). Understanding the electron beam properties such as the energy spread and emittance is critical for achieving high quality light sources with high brightness. By using an insertion device such as an undulator and observing changes in the spontaneous emission spectrum, the electron beam energy spread and emittance can be measured with high precision. The initial experiments will use spontaneous emission from 1.5 m of undulator. Later experiments will use up to 5 m of undulator with a goal of a high gain, XUV FEL.

Bakeman, M.S.; Fawley, W.M.; Leemans, W. P.; Nakamura, K.; Robinson, K.E.; Schroeder, C.B.; Toth, C.

2009-05-04T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Proposal of a Bulk HTSC Staggered Array Undulator  

SciTech Connect (OSTI)

We proposed a new type of undulator based on bulk high-T{sub c} superconductors (HTSC) which consists of a single solenoid and a stacked array of bulk HTSC. The main advantage of this configuration is that a mechanical structure is not required to produce and control the undulator field. In order to perform a proof of principle experiment, we have developed a prototype of bulk HTSC staggered array undulator using 11 pairs of DyBaCuO bulk superconductors and a normal conducting solenoid. Experimental results obtained by using the prototype undulator and numerical results obtained by a loop current model based on the Bean mode for a type-II superconductor were compared.

Kii, Toshiteru; Kinjo, Ryota; Bakr, Mahmoud A.; Sonobe, Taro; Higashimura, Keisuke; Masuda, Kai; Ohgaki, Hideaki; Yoshida, Kyohei [Institute of Advanced Energy, Kyoto University, Kyoto, 611-0011 (Japan); Zen, Heisyun [Institute for Molecular Science, National Institute of Natural Sciences, Aichi 444-8585 (Japan)

2010-06-23T23:59:59.000Z

42

Wind-Speed Undulations Over Swell: Field Experiment and Interpretation  

Science Journals Connector (OSTI)

Results of field measurements of the swell-induced undulation of the wind speed taken from a Black Sea platform are presented. The wind speed and its fluctuations were measured at several ... m above the mean sea...

Y. P. Soloviev; V. N. Kudryavtsev

2010-09-01T23:59:59.000Z

43

On the Kinematics of Undulator Girder Motion  

SciTech Connect (OSTI)

The theory of rigid body kinematics is used to derive equations that govern the control and measurement of the position and orientation of undulator girders. The equations form the basis of the girder matlab software on the LCLS control system. The equations are linear for small motion and easily inverted as desired. For reference, some relevant girder geometrical data is also given. Equations 6-8 relate the linear potentiometer readings to the motion of the girder. Equations 9-11 relate the cam shaft angles to the motion of the girder. Both sets are easily inverted to either obtain the girder motion from the angles or readings, or, to find the angles and readings that would give a desired motion. The motion of any point on the girder can be calculated by applying either sets of equations to the two cam-planes and extrapolating in the z coordinate using equation 19. The formulation of the equations is quite general and easily coded via matrix and vector methods. They form the basis of the girder matlab software on the LCLS control system.

Welch, J; /SLAC; ,

2011-08-18T23:59:59.000Z

44

Scaling of EPR spectral-spatial images with size of sample: Images of a sample greater than 5 cm in linear dimension  

SciTech Connect (OSTI)

The authors have obtained spectral-spatial EPR images of a phantom significantly larger than those previously obtained. Images of a homogeneous phantom 4.2 cm in diameter and 6.5 cm in length with B{sub 1} equivalent to that used for smaller samples give a similar linewidth resolution both with linewidth population distributions of width 0.1 {mu}T. Spatial resolution appeared to have modest degradation. Images of the large homogeneous phantom provide maps of the magnetic field of a partially shimmed magnet.

Ahn, Kang-Hyun; Subramanian, V. S.; Halpern, Howard J. [Department of Radiation and Cellular Oncology, University of Chicago, Chicago, Illinois 60637 and Center for EPR Imaging in Vivo Physiology, University of Chicago, Chicago, Illinois 60637 (United States)

2007-12-15T23:59:59.000Z

45

Superconductive Mini-Gap Undulators - A New Way To High Energy Photons: Latest News  

SciTech Connect (OSTI)

New applications of Synchroton Radiation (e.g. protein crystallography or FEL) require a high flux of high-brilliance and high-energy photons. This goal can be achieved by use of a superconducting small gap in-vacuo undulator in existing or future storage rings. The range of gap size, magnetic field and period length covered by ACCEL's actual design will be presented. The impact of upstream components in the storage ring and beam properties, respectively, on the layout of the Insertion Device, will be discussed. Emphasis will be put on new magnetic measurement data from the first full length device built.

Kubsky, S.; Doelling, D.; Geisler, A.; Hobl, A.; Klein, U.; Krischel, D. [ACCEL Instruments GmbH (Germany); Moser, H. O. [Singapore Synchrotron Light Source, National University of Singapore (Singapore); Rossmanith, R.; Chouhan, S. [Institute for Synchrotron Radiation, FZK (Germany)

2004-05-12T23:59:59.000Z

46

SCIENTIFIC POTENTIAL AND DESIGN CONSIDERATIONS FOK AN UNDULATOR BEAM LINE  

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

POTENTIAL AND POTENTIAL AND DESIGN CONSIDERATIONS FOK AN UNDULATOR BEAM LINE ON ALADDIN STORAGE RING A. J. Arko, S. D. Bader, J. L. Dehmer~ S. H. Kim, G. S. Knap~, G. K. Shenoy B. W. Veal and C. E. Young Argonne National Laboratory F. C. Brown University of Illinois J. W. Weaver University of Minnesota LS -21 April 8 ~ 1~8~ 1. Introducti on The unique features of undulator radiation, i.e., high photon nux and brightness, partial coherence, small b~am divergence, spectral tunabi1ity, etc., mandate that undulators be included in the future plans for Aladdin. Tnis will make it possible to perfonn the -next generation of experiments in photon-stimulated spectroscopies. A tealn of scientists (see Appendix) has now been assembled to build an insertion device (ID) and the associated beam line

47

NSLS IN-VACUUM UNDULATORS AND MINI-BETA STRAIGHTS.  

SciTech Connect (OSTI)

We review the work carried out in the X13 R&D Straight Section of the NSLS X-Ray Ring on small gap in-vacuum undulators (IVUNs). Then we discuss: (1) plans to replace the pure permanent magnet undulator in X13 by a hybrid design providing stronger magnetic fields, enhancing the tunability of the device; (2) plans to install hybrid IVUNs in the two RF straights of the X-Ray Ring, increasing the number of insertion devices in the XRay Ring to eight; (3) the possibility of reducing the vertical beta function in the X13 straight from 0.33 m down to 0.16 m. This reduction in beta function would allow us to decrease the usable undulator gap from 3mm down to 2mm, further increasing the tuning range.

RAKOWSKY,G.; LYNCH,D.; BLUM,E.B.; KRINSKY,S.

2001-06-18T23:59:59.000Z

48

Measuring The Source Brilliance at An Undulator Beamline  

SciTech Connect (OSTI)

Third-generation X-ray synchrotrons like the European Synchrotron Radiation Facility (ESRF) are optimized to produce intense undulator radiation. Insertion devices, such as undulators, ensure the highest possible brilliance--the key parameter for the success of e.g. coherent scattering, which is one of the main techniques employed at ESRF's TROIKA beamline. Nowadays, the constant efforts to reduce the emittance and improve the stability of the electron beam allow using small-gap insertion devices and increase the brilliance. Obviously, it is important to have an experimental technique for evaluating the performance of the undulator source. Here we present a method based on measuring the diffuse scattering from a light amorphous material by a photon counting detector. The measured spectral intensities show a very good agreement with the simulated spectra, demonstrating the high brilliance (above 10{sup 20} ph/s/0.1%bw/mrad{sup 2}/mm{sup 2}) achieved at modern facilities.

Zontone, Federico; Madsen, Anders; Konovalov, Oleg [European Synchrotron Radiation Facility, BP220, F-38043 Grenoble Cedex (France)

2010-06-23T23:59:59.000Z

49

Proposed dielectric-based microstructure laser-driven undulator T. Plettner and R. L. Byer  

E-Print Network [OSTI]

sources that feed into permanent-magnet undulators. The distinguish- ing feature of the undulator proposed to couple a laser beam into an accelerating force that remains overlapped with the relativistic electron

Byer, Robert L.

50

A strong permanent magnet-assisted electromagnetic undulator  

DOE Patents [OSTI]

This invention discloses an improved undulator comprising a plurality of electromagnet poles located along opposite sides of a particle beam axis with alternate north and south poles on each side of the beam to cause the beam to wiggle or undulate as it travels generally along the beam axis and permanent magnets spaced adjacent the electromagnetic poles on each side of the axis of said particle beam in an orientation sufficient to reduce the saturation of the electromagnet poles whereby the field strength of the electromagnet poles can be increased beyond the normal saturation levels of the electromagnetic poles. 4 figs.

Halbach, K.

1987-01-30T23:59:59.000Z

51

X-25 Cryo-ready In-vacuum Undulator at the NSLS  

SciTech Connect (OSTI)

The existing 15-year-old hybrid wiggler at the NSLS has been replaced by a state-of-the-art, cryo-ready in-vacuum undulator optimized for a dedicated macromolecular crystallography program. The device is a 1m long, 18mm period, hybrid PM-type with a minimum operating gap of 5.6mm, and has provision for cryo-cooling to 150K. Unlike the original SPring-8 cryo-PM undulator proposal, we use a new high-remanence, high-temperature grade of NdFeB (NEOMAX 42AH with Br=1.3T and Hcj=24 kOe) that can be baked to 100 deg. C to be UHV-ready in case of cooling system failure. A novel optical gap measurement system using a LED-based product ensures gap accuracy of {+-}2 micro meter. A friction stir welding technique is used for the first time in an accelerator UHV device to minimize stress and deformation of the magnet arrays due to temperature gradients. This paper describes design issues of the device and other considerations such as magnetic measurement at low temperature.

Tanabe, Toshiya; Ablett, James; Berman, Lonny; Harder, David A.; Hulbert, Steve; Lehecka, Mike; Rakowsky, George; Skaritka, John [National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY 11973 (United States); Deyhim, Alex; Johnson, Eric; Kulesza, Joe; Waterman, Dave [Advanced Design Consulting, U.S.A, Inc., 126 Ridge Rd, PO Box 187, Lansing, NY 14882 (United States)

2007-01-19T23:59:59.000Z

52

Similarity of structuring in the range 10^{-5} cm to 10^23 cm hints at a baryonic cold dark skeleton of the Universe  

E-Print Network [OSTI]

The presence of skeletal structures of the same distinctive topology (cartwheels, tubules, etc.), in the range 10^{-5} - 10^23 cm, and a trend toward self-similarity of these structures are found. These evidences come from the electron micrography of dust deposits in tokamak (10^{-6} - 10^{-3}cm), the images of plasma taken in laboratory electric discharges -- tokamaks, Z-pinches, plasma focus and vacuum spark (10^{-2} - 10 cm), hail particles (1-10 cm), the images of tornado (10^3 - 10^5 cm), the Hubble Space Telescope and Chandra X-Ray Observatory public archives' images (up to 10^23 cm). The redshift surveys of galaxies and quasars suggests the possibility to draw the above similarity farther, up to 10^26 cm. The above similarity hints at the presence of a baryonic cold dark skeleton (BCDS) of the Universe, which -- in the entire range 10^{-5} - 10^26 cm -- may contain ordinary matter in a fractal condensed form like that in the above-mentioned dust skeletons and hail particles. The probable compatibility of the BCDS with the major cosmological facts (Hubble's expansion and cosmic microwave background) is suggested. Our former hypotheses (and the respective proof-of-concept studies) for the probable microscopic mechanisms of skeleton's assembling, chemical composition, and survivability in ambient hot plasmas are discussed briefly. The respective major cosmological implication is that the purely gravitational description of the large-scale structure of the Universe is likely to be appended with a contribution of quantum electromagnetism, presumably in the form of a skeleton self-assembled from tubular nanostructures (carbon nanotubes or similar nanostructures of other chemical elements).

A. B. Kukushkin; V. A. Rantsev-Kartinov

2002-05-30T23:59:59.000Z

53

Undulator design for synchrotron radiation sources using simulated annealing  

SciTech Connect (OSTI)

Simulated annealing provides an algorithm for arranging measured wiggler field errors to minimize a ``cost function`` characterizing errors in electron trajectories and other aspects of magnetic field quality. Rocketdyne has most recently demonstrated the efficacy of this approach in the design and fabrication of a pure permanent magnet prototype small-gap undulator for BNL. The cost functions developed for this purpose are derived and the results presented.

Cover, R.A.; Rakowsky, G.; Bobbs, B.; Kennedy, P.K. [Rockwell International, Canoga Park, CA (United States). Rocketdyne Division] [Rockwell International, Canoga Park, CA (United States). Rocketdyne Division

1995-04-01T23:59:59.000Z

54

Phase errors and predicted spectral performance of a prototype undulator  

SciTech Connect (OSTI)

A prototype undulator has been used to study different magnetic end-configurations and shimming techniques for straightening the beam trajectory. Field distributions obtained by Hall probe measurements were analyzed in terms of trajectory, phase errors, and on-axis brightness for the purpose of correlating predicted spectral intensity with the calculated phase errors. Two device configurations were analyzed. One configuration had a full-strength first magnet at each end and the next-to-last pole was recessed to make the trajectory through the middle of the undulator parallel to the undulator axis. For the second configuration, the first permanent magnet at each end was replaced by a half-strength magnet to reduce the trajectory displacement and the next-to-last pole was adjusted appropriately, and shims were added to straighten the trajectory. Random magnetic field errors can cause trajectory deviations that will affect the optimum angle for viewing the emitted radiation, and care must be taken to select the appropriate angle when calculating the phase errors. This angle may be calculated from the average trajectory angle evaluated at the location of the poles. For the second configuration, we find an rms phase error of less than 3{degrees} and predict 87% of the ideal value of the on-axis brightness for the third harmonic. We have also analyzed the gap dependence of the phase errors and spectral brightness and have found that the rms phase error remain small at all gap settings.

Dejus, R.J.; Vassrman, I.; Moog, E.R.; Gluskin, E.

1994-08-01T23:59:59.000Z

55

Initial results of operating the rocketdyne undulator in a tapered configuration  

Science Journals Connector (OSTI)

The near-infrared Rocketdyne/Stanford free electron laser (FEL) uses a very-high-quality precision undulator whose field strength and field taper are adjustable. The Rocketdyne undulator has been operated in both an amplifier configuration, as in the master-oscillator power amplifier (MOPA) experiments, and an oscillator configuration, as in the photocathode and tapered-undulator experiments. The tapered-undulator experiment was performed at the Stanford Photon Research Laboratory (SPRL) using an electron beam supplied by the Mark III rf-linac. During the experiment we observed sustained oscillations as the undulator magnetic-field taper was continuously tuned from 0% to 10%. We observed ?1.2% extraction efficiency for a magnetic-field taper of 9.6%. During the same experiment we observed sustained oscillations as the undulator gap was continuously varied over 120 mil. Details of the experiment are presented.

Mark Curtin; Anup Bhowmik; Jeffrey Brown; Wayne McMullin; Philip Metty; Stephen V. Benson; John M.J. Madey

1990-01-01T23:59:59.000Z

56

A Novel High-Resolution Alignment Technique for XFEL Using Undulator X-ray Beams  

E-Print Network [OSTI]

1 A Novel High-Resolution Alignment Technique for XFEL Using Undulator X-ray Beams Bingxin Yang Abstract We propose a novel alignment technique utilizing the x-ray beam of an undulator in conjunction a stable and reproducible x-ray beam axis (XBA). Targets are precisely positioned on the XBA using

Kemner, Ken

57

ANL/APS/TB-3 Undulator A Characteristics and Specifications  

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

ANL/APS/TB-3 ANL/APS/TB-3 Undulator A Characteristics and Specifications by B. Lai, A. Khounsary,R. Savoy, L. Moog, and E. Gluskin February 1993 Advanced Photon Source . & Argonne National Laboratory, Argonne, Illinois 60439 o operated by The University of Chicago for the United States Department of Energy under Contract W-31-1 09-Eng-38 '"~ Argonne National Laboratory, with facilties in the states of Ilinois and Idaho, is owned by the United States government, and operated by The University of Chicago under the provisions of a contract with the Department of Energy. . DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any waranty, express

58

Linac Coherent Light Source Undulator RF BPM System  

SciTech Connect (OSTI)

The Linac Coherent Light Source (LCLS) will be the world's first x-ray free-electron laser (FEL) when it becomes operational in 2009. The LCLS is currently in the construction phase. The beam position monitor (BPM) system planned for the LCLS undulator will incorporate a high-resolution X-band cavity BPM system described in this paper. The BPM system will provide high-resolution measurements of the electron beam trajectory on a pulse-to-pulse basis and over many shots. The X-band cavity BPM size, simple fabrication, and high resolution make it an ideal choice for LCLS beam position detection. We will discuss the system specifications, design, and prototype test results.

Lill, R.M.; Morrison, L.H.; Waldschmidt, G.J.; Walters, D.R.; /Argonne; Johnson, R.; Li, Z.; Smith, S.; Straumann, T.; /SLAC

2007-04-17T23:59:59.000Z

59

Nd-Fe-B Undulator Design for CES~ G. K. Shenoy, P. J. Viccaro and S. Kim  

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

Nd-Fe-B Undulator Design for CES~ Nd-Fe-B Undulator Design for CES~ G. K. Shenoy, P. J. Viccaro and S. Kim Introduction LS-72 10/14/86 It is proposed to build a Nd-Fe-B based undulator on CESR ring which would provide pseudomonochromatic tunable radiation in the hard x-ray range from 4 to 15 keY. Such an intense radiation source opens unlimited possibilities for doing exciting science in material science and condensed matter physics. Here, we present the design goals for such an undulator and discuss the influence of various parameters that govern the properties of radiation from undulators. The analysis of these results leads us to select the specific design parameters of the undulator that will meet the radiation needs of the experimental program. Undulator Design Goals

60

Delta undulator test result and specific of a small bore insertion...  

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

Delta undulator magnet beam test at ATF (BNL) *Work has been supported by NSF grant DMR 0225180 and PHY- 013150 and supported by DOE Office of Science M. Babzien, D. Davis, M....

Note: This page contains sample records for the topic "5-cm period undulator" 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

Beamline Front-End for Minipole Undulator at the Photon Factory Storage Ring  

SciTech Connect (OSTI)

The straight-section upgrade project of the Photon Factory created four new short straight sections capable of housing in-vacuum minipole undulators. The first to third minipole undulators SGU no. 17, SGU no. 03 and SGU no. 01 were installed at the 2.5-GeV Photon Factory storage ring in 2005, 2006 and 2009, respectively. The beamline front ends for SGU0 no. 3 and SGU0 no. 1 are described in this paper.

Miyauchi, Hiroshi; Tahara, Toshihiro; Asaoka, Seiji [Photon Factory, High Energy Accelerator Research Organization, KEK Oho, Tsukuba, Ibakaki 305-0801 (Japan)

2010-06-23T23:59:59.000Z

62

A Study of undulator magnets characterization using the Vibrating Wire technique  

SciTech Connect (OSTI)

The vibrating wire (VW) technique employs a stretched wire as a magnetic field sensor. Because of the wire's small diameter ({approx}0.1mm or smaller) and because the wire can be supported from outside the magnet, this technique is very appealing for field measurements in small gap/bore undulators with small good field regions and with limited access to the tested field. In addition, in the case of elliptical undulators in which Hall probe (HP) measurements can be affected by the planar Hall effect, VW technique can be used as an independent method to verify and supplement HP measurements. In this article we studied the potential of the VW technique for measurement of magnetic field errors and for prediction of beam trajectories in undulator magnets using a 3.8m long LCLS undulator as a test bench. Introducing calibrated magnetic field distortion at various locations, we measured the sensitivity and spatial resolution of the method. The method demonstrated 0.9mm spatial resolution at a distance up to a few meters and 0.37Gcm sensitivity to the field integral. To compare Hall probe and Vibrating wire measurements side-by-side, we measured field errors in an LCLS undulator previously characterized by Hall probe measurements. The field errors found with the Vibrating Wire technique appeared to be in good agreement with errors measured with the Hall probe. Beam trajectory distortions calculated from both data sets are also in a good agreement.

Temnykh, Alexander; /Cornell U., LEPP; Levashov, Yurii; Wolf, Zachary; /SLAC; ,

2011-02-07T23:59:59.000Z

63

A synchrotron X-ray study of competing undulation and electrostatic interlayer interactions in fluid multimembrane lyotropic phases  

E-Print Network [OSTI]

arise from attrac- tive electrodynamic van der Waals and, normally repulsive electrostatic forces [2307 A synchrotron X-ray study of competing undulation and electrostatic interlayer interactions of competing electrostatic and undulation forces in two multimembrane systems in the lamellar L03B1 phase

Boyer, Edmond

64

Tests of Coordinate Transfer from Magnetic to Mechanical Reference for LCLS Undulator Fiducialization  

SciTech Connect (OSTI)

Fiducialization of the LCLS undulators will be based on magnetic measurements by Hall probe. Pointed magnets, proposed by I.Vasserman for quadrupole lens fiducialization will be used as an intermediate reference. A prototype of the pointed magnet fixture has been made and tested. In this note we will describe a procedure for measuring the position of the center of the Hall probe sensitive area with respect to the undulator fiducial marks. The pointed magnet calibration procedure, a two-point algorithm for locating the magnetic center of the fixture, and test results are presented.

Levashov, Yu.

2010-12-13T23:59:59.000Z

65

Prototype photon position monitors for undulator beams at the Advanced Light Source  

SciTech Connect (OSTI)

Design criteria are described, and test results are presented, for prototype ALS undulator beam position monitors. The design is based on monitors presently in use at NSLS, with modifications to account for the widely varying and large K values of the undulators to be installed at the ALS. In particular, we have modified the design to simplify the thermal engineering and we have explored techniques to suppress the response of the monitors to soft photons, so that the beam position can be determined by measuring the higher energy photons which are better collimated. 4 refs., 8 figs.

Warwick, T.; Shu, D. (Lawrence Berkeley Lab., CA (United States)); Rodricks, B. (Argonne National Lab., IL (United States)); Johnson, E.D. (Brookhaven National Lab., Upton, NY (United States))

1990-10-17T23:59:59.000Z

66

Polarization Analysis for Seeded FELs in a Crossed-Planar Undulator  

SciTech Connect (OSTI)

The crossed-planar undulator is a promising scheme for full polarization control in x-ray FELs. For SASE FELs, it has been shown a maximum degree of circular polarization of about 80% is achievable at fundamental wavelength just before saturation. In this paper, we study the effectiveness of a crossed undulator for a seeded x-ray FEL. The degree of circular polarization for both the fundamental and the harmonic radiation are considered. Simulations with realistic beam distributions show that a degree of circular polarization of over 90% and 80% is obtainable at the fundamental and 2nd harmonic frequencies, respectively.

Geng, Huiping; /SLAC; Ding, Yuantao; /SLAC; Huang, Zhirong; /SLAC; Bartolini, Riccardo; /Diamond Light Source; Dunning, David; /Daresbury; Thompson, Neil; /Daresbury

2012-06-25T23:59:59.000Z

67

Probing the Transverse Coherence of an Undulator X-Ray Beam Using Brownian Particles  

SciTech Connect (OSTI)

We present a novel method to map the two-dimensional transverse coherence of an x-ray beam using the dynamical near-field speckles formed by scattering from colloidal particles. Owing to the statistical nature of the method, the coherence properties of synchrotron radiation from an undulator source is obtained with high accuracy. The two-dimensional complex coherence function is determined at the sample position and the imaging optical scheme further allowed us to evaluate the coherence factor at the undulator output despite the aberrations introduced by the focusing optics.

Alaimo, M. D. [Dipartimento di Fisica, Universita di Milano, I-20133 Milano, CNISM (Italy); European Synchrotron Radiation Facility, BP-220, F-38043 Grenoble (France); Potenza, M. A. C.; Manfredda, M.; Giglio, M. [Dipartimento di Fisica, Universita di Milano, I-20133 Milano, CNISM (Italy); Geloni, G. [Deutsches Elektronen-Synchrotron and European XFEL GmbH, D-22607 Hamburg (Germany); Sztucki, M.; Narayanan, T. [European Synchrotron Radiation Facility, BP-220, F-38043 Grenoble (France)

2009-11-06T23:59:59.000Z

68

FEL performance with pure permanent-magnet undulators having optimized ordering  

Science Journals Connector (OSTI)

The degradation of FEL performance by field errors can be greatly mitigated in a pure permanent-magnet undulator by appropriate ordering of magnets. Monte Carlo techniques have been used to obtain such optimized ordering for various systems. The resulting performance improvement has been evaluated using the Rocketdyne simulation code FELOPT.

R.A. Cover; B.L. Bobbs; G. Rakowsky; M.M. Johnson; S.P. Mills

1990-01-01T23:59:59.000Z

69

Simulation of U-5 prototype undulator effects on the beam dynamics  

SciTech Connect (OSTI)

The APS prototype undulator U-5 has been installed at NSLS VUV ring. Its effects on the beam behaviour have been simulated with tracking codes TEAPOT and RACETRACK. The tune shift, the distortion of betatron function, the chromaticity, the transverse coupling, and some of the amplitude-dependent effects on the VUV ring have been compared and are presented in this paper.

Qian, Y.L.; Turner, L.R.

1992-04-06T23:59:59.000Z

70

Superconducting switch concept applied to superconducting undulator phase-error correction  

SciTech Connect (OSTI)

Superconducting undulator (SCU) technology has the potential to significantly enhance the performance of synchrotron radiation sources for storage ring and FEL applications. Since 2002, our team at Lawrence Berkeley National Laboratory has been performing R and D on superconducting undulators, including the fabrication of three Nb{sub 3}Sn prototypes. We have demonstrated experimentally the possibility to provide the prototype with trim coils that could be used for phase error correction. The research effort that we report here demonstrates the possibility to add degrees of freedom to the field correction provided by these coils in a cryogenic environment. By means of bridge of superconducting switches, we can modify the current direction through a trim coil. Here we describe the design of the experimental bridge we fabricated, the results we obtained and finally the generalized concept one could plan to apply to correct the phase errors with trim coils connected to a network of superconducting bridges.

Madur, A.; Trillaud, F.; Dietderich, D.; Marks, S.; Prestemon, S.; Schlueter, R. [LBNL, 1 Cyclotron Road, BERKELEY, CA, 94720 (United States)

2010-06-23T23:59:59.000Z

71

ANL/APS/TB-24 Diamond Monochromators for APS Undulator-A Beamlines  

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

4 4 Diamond Monochromators for APS Undulator-A Beamlines R.C. Blasdell, L. A. Assoufid, and D. M. Mills TABLE OF CONTENTS 1. INTRODUCTION .................................................................................1 2. PHYSICAL PROPERTIES OF DIAMONDS ..................................................5 2.1 Varieties of Diamonds ....................................................................5 2.2 The Lattice Parameter .....................................................................5 2.3 Bulk Thermal and Mechanical Properties ...............................................6 2.4 Typical Surface and Lattice Plane Morphology ......................................8 2.5 The Liquid-GaIn/Diamond Interface ...................................................10 3. DIFFRACTION PROPERTIES OF DIAMOND

72

A simple model based magnet sorting algorithm for planar hybrid undulators  

SciTech Connect (OSTI)

Various magnet sorting strategies have been used to optimize undulator performance, ranging from intuitive pairing of high- and low-strength magnets, to full 3D FEM simulation with 3-axis Helmholtz coil magnet data. In the extreme, swapping magnets in a full field model to minimize trajectory wander and rms phase error can be time consuming. This paper presents a simpler approach, extending the field error signature concept to obtain trajectory displacement, kick angle and phase error signatures for each component of magnetization error from a Radia model of a short hybrid-PM undulator. We demonstrate that steering errors and phase errors are essentially decoupled and scalable from measured X, Y and Z components of magnetization. Then, for any given sequence of magnets, rms trajectory and phase errors are obtained from simple cumulative sums of the scaled displacements and phase errors. The cost function (a weighted sum of these errors) is then minimized by swapping magnets, using one's favorite optimization algorithm. This approach was applied recently at NSLS to a short in-vacuum undulator, which required no subsequent trajectory or phase shimming. Trajectory and phase signatures are also obtained for some mechanical errors, to guide 'virtual shimming' and specifying mechanical tolerances. Some simple inhomogeneities are modeled to assess their error contributions.

Rakowsky, G.

2010-05-23T23:59:59.000Z

73

Controlling the morphology of carbon nanotube arrays: from spinnable forests to undulating foams  

SciTech Connect (OSTI)

By controlling catalyst pretreatment conditions, we demonstrate that the degree of spinnability of carbon nanotubes (CNTs) is closely related to the morphology of CNT arrays. Shortest catalyst pretreatment time led to CNT arrays with the best spinnability, while prolonged pretreatment resulted in coarsening of catalyst particles and non-spinnable CNTs. We further demonstrate the growth of undulating CNT arrays with uniform and tunable waviness by controlling the coalescence of catalyst particles. The CNT arrays can be tuned from well-aligned, spinnable forests to uniformly wavy, foam-like films by controlling catalyst pretreatment conditions.

Zhang, Yingying [Los Alamos National Laboratory; Zou, Guifu [Los Alamos National Laboratory; Stan, Liliana [Los Alamos National Laboratory; Hawley, Marilyn E [Los Alamos National Laboratory; Sheehan, Chris J [Los Alamos National Laboratory; Zhu, Yuntain [Los Alamos National Laboratory; Jia, Quanxi [Los Alamos National Laboratory; Doorn, Stephen K [NCSU; Htoon, Han [NCSU

2009-01-01T23:59:59.000Z

74

Characterization of the Support and Drive System of the PETRA III APPLE Undulator  

SciTech Connect (OSTI)

Helmholtzzentrum Berlin has built an APPLE II undulator for the storage ring PETRA III. The device has a total length of 5m and a minimum gap of 11mm. The high magnetic forces in particular in the inclined mode have been analyzed by means of finite element methods (FEM). Specific mechanic components such as flexible joints have been optimized to cope with the gap- and shift-dependent 3D-forces and a sophisticated control and drive system has been implemented. After completion of the device, detailed laser interferometer measurements for all operation modes have been performed. The data are compared to the FEM simulations.

Bahrdt, J.; Baecker, H.-J.; Frentrup, W.; Gaupp, A.; Gottschlich, S.; Kuhn, C.; Scheer, M.; Schulz, B. [Helmholtzzentrum Berlin fuer Materialien und Energie, Glienicker Strasse 100, D-14109 Berlin (Germany); Gast, M. [Hochschule fuer Wirtschaft und Recht Berlin, Badensche Str. 50-51, D-10825 Berlin (Germany); Englisch, U.; Schoeps, A.; Tischer, M. [Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, D-22607 Hamburg (Germany)

2010-06-23T23:59:59.000Z

75

ANL/APS/LS-313 Short-Period APPLE II Undulator for Generating 12-15 keV  

E-Print Network [OSTI]

Radiation Center, Higashi-Hiroshima, 739-0046, Japan Rev. 3, November 25, 2009: Edited by C. Eyberger a zero-emittance electron beam, all radiation on-axis above the first harmonic will be zero). However APPLE II design. In this note, we present magnet design calculations and radiation calculations

Kemner, Ken

76

NOVEL CHAMBER DESIGN FOR AN IN-VACUUM CRYO-COOLED MINI-GAP UNDULATOR.  

SciTech Connect (OSTI)

A stainless steel, Ultra-High Vacuum (UHV) chamber, featuring a large vertical rectangular port (53''W by 16''H), has been fabricated to house the one-meter magnet assembly of a newly installed undulator insertion device for beamline X-25 at the National Synchrotron Light Source. To achieve UHV, the new chamber is equipped with a differential ion pump, NEG pump, nude ion gauge, residual gas analyzer, and an all metal roughing valve. Temperature of the magnet assembly is maintained below 90 C during vacuum bake. The large rectangular port cover is sealed to the main flange of the chamber using a one-piece flat aluminum gasket and special sealing surfaces developed exclusively by Nor-Cal Products, Inc. The large flange provides easy access to the gap of the installed magnet girders for in situ magnetic measurements and shimming. Special window ports were designed into the cover and chamber for manipulation of optical micrometers external to the chamber to provide precise measurements of the in-vacuum magnet gap. The vacuum chamber assembly features independently vacuum-isolated feedthroughs that can be used for either water-or-cryogenic refrigeration-cooling of the monolithic magnet girders. This would allow for cryogenic-cooled permanent magnet operation and has been successfully tested within temperature range of +100 C to -150 C. Details of the undulator assembly for beamline X-25 is described in the paper.

HU, J.-P.; FOERSTER, C.L.; SKARITKA, J.R.; WATERMAN, D.

2006-05-24T23:59:59.000Z

77

New soft X-ray beamline BL07LSU for long undulator of SPring-8: Design and status  

E-Print Network [OSTI]

. Kitamura a,c , A. Kakizaki b , M. Oshima b a Japan Synchrotron Radiation Research Institute, SPring-8, Japan b Synchrotron Radiation Research Organization, The University of Tokyo, Japan c RIKEN, SPring-8, Japan a r t i c l e i n f o Available online 5 January 2011 Keywords: Synchrotron radiation Undulator

Miyashita, Yasushi

78

On-Axis Brilliance and Power of In-Vacuum Undulators for The Advanced Photon Source  

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

4 4 On-Axis Brilliance and Power of In-Vacuum Undulators for the Advanced Photon Source (formerly MD-TN-2009-004) R. Dejus, M. Jaski, and S.H. Kim - MD Group/ASD Rev. 1, November 25, 2009: Updated the fitted B eff in Tables 1 - 3, and 5 to use two decimals in the fitted equation. Explained chosen gaps. Added clarifications in the text and added additional references. Edited by C. Eyberger for release as cleared document ANL/APS/LS-314; updated in ICMS. Rev. 0a, June 17, 2009: ICMS Initial Release (minor clarifications and corrections of typographical errors, added footnote "d" to Table 4). Rev. 0, June 16, 2009: First Release as Technical Note MD-TN-2009-004. Table of Contents Introduction ......................................................................................................................... 2

79

P. J. Viccaro, D. C. James & S. D. Bader PROCUREMENT HISTORY OF THE HYBRID UNDULATOR FOR THE U-5  

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

#-137 #-137 April 1989 P. J. Viccaro, D. C. James & S. D. Bader PROCUREMENT HISTORY OF THE HYBRID UNDULATOR FOR THE U-5 BEAM LINE AT THE NATIONAL SYNCHROTRON LIGHT SOURCE D. C. James ANL Procurement S. D. Bader Materials Science Division P. J. Viccaro Advanced Photon Source Division Introduction: As part of a national multi -insti tutional Materials Research Group (MRG) , Argonne National Laboratory had the responsibility, under a prime contract wi th the U. S. Department of Energy, of 09taining a Permanent Magnet Hybrid undulator to be used on the U5 Beam Line on the VUV Ring at the National Synchrotron Light Source (NSLS). The procurement involved determining the technical "specifications of the device as well as developing an effective ... ....;.., procedure for evaluation of the proposals. The conceptual-design of the

80

Statistical properties of the radiation from SASE FEL operating in a post-saturation regime with and without undulator tapering  

E-Print Network [OSTI]

We describe statistical and coherence properties of the radiation from x-ray free electron lasers (XFEL) operating in the post-saturation regime. We consider practical case of the SASE3 FEL at the European XFEL. We perform comparison of the main characteristics of the X-ray FEL operating in the post-saturation regime with and without undulator tapering: efficiency, coherence time and degree of transverse coherence.

Schneidmiller, E A

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

An Energy-Stabilized Varied-Line-Space-Monochromator UndulatorBeam Line for PEEM Illumination and Magnetic Circular Dichroism  

SciTech Connect (OSTI)

A new undulator beam line has been built and commissioned at the Advanced Light Source for illumination of the PEEM3 microscope. The beam line delivers high flux beams over an energy range from C1s through the transition metals to include the M edges of the magnetic rare earth elements. We present details of the optical design, and data on the performance of the zero-order tracking of the photon energy.

Warwick, Tony; McKinney, Wayne; Domning, Ed; Doran, Andrew; Padmore, Howard

2006-06-01T23:59:59.000Z

82

Optimization of the Coherent Intensity from Multi-Segment Undulators by Phase Matching  

SciTech Connect (OSTI)

The use of inline insertion devices at third-generation synchrotron radiation sources can result in destructive interference effects if the relative phase between the devices is not properly adjusted. The destructive interference can strongly affect the emission spectrum and coherent wavefront of a compound insertion device. We simulate the photon source generated by a dual-inline elliptically polarizing undulator (EPU) situated in a low-{beta} straight section of the planned NSLS-II storage ring and show that a magnetic chicane with adjustable field integral can be used to phase-match the devices. Furthermore, we show that the maximum coherent intensity is delivered by a focusing x-ray beamline if the chicane is adjusted to phase-match the off-axis and red-shifted radiation. Such a system will be installed at the coherent soft x-ray (CSX) beamline of the NSLS-II in order to provide the highest possible coherent flux for coherent soft x-ray scattering experiments.

Shapiro, D.; Chubar, O.; Reininger, R.; Sanchez-Hanke, C. [NSLS and NSLS-II, Brookhaven National Laboratory, Upton, NY 11973 (United States)

2011-09-09T23:59:59.000Z

83

Optimization of the Coherent Intensity from Multi-Segment Undulators by Phase Matching  

SciTech Connect (OSTI)

The use of inline insertion devices at third-generation synchrotron radiation sources can result in destructive interference effects if the relative phase between the devices is not properly adjusted. The destructive interference can strongly affect the emission spectrum and coherent wavefront of a compound insertion device. We simulate the photon source generated by a dual-inline elliptically polarizing undulator (EPU) situated in a low-{beta} straight section of the planned NSLS-II storage ring and show that a magnetic chicane with adjustable field integral can be used to phase-match the devices. Furthermore, we show that the maximum coherent intensity is delivered by a focusing x-ray beamline if the chicane is adjusted to phase-match the off-axis and red-shifted radiation. Such a system will be installed at the coherent soft x-ray (CSX) beamline of the NSLS-II in order to provide the highest possible coherent flux for coherent soft x-ray scattering experiments.

Shapiro D.; Chubar, O.; Reininger, R.; Sanchez-Hanke, C.

2012-08-15T23:59:59.000Z

84

Experimental evidence of planar channeling in a periodically bent crystal  

E-Print Network [OSTI]

The usage of a Crystalline Undulator (CU) has been identified as a promising solution for generating powerful and monochromatic $\\gamma$-rays. A CU was fabricated at SSL through the grooving method, i.e., by the manufacturing of a series of periodical grooves on the major surfaces of a crystal. The CU was extensively characterized both morphologically via optical interferometry at SSL and structurally via X-ray diffraction at ESRF. Then, it was finally tested for channeling with a 400 GeV/c proton beam at CERN. The experimental results were compared to Monte Carlo simulations. Evidence of planar channeling in the CU was firmly observed. Finally, the emission spectrum of the positron beam interacting with the CU was simulated for possible usage in currently existing facilities.

Bagli, E; Bellucci, V; Berra, E; Camattari, R; De Salvador, D; Germogli, G; Guidi, V; Lanzoni, L; Lietti, D; Mazzolari, A; Prest, M; Tikhomirov, V V; Vallazza, E

2014-01-01T23:59:59.000Z

85

Design and characterization of an undulator beamline optimized for small-angle coherent X-ray scattering at the Advanced Photon Source  

Science Journals Connector (OSTI)

The design of an undulator beamline at the Advanced Photon Source optimized for performing coherent small-angle X-ray scattering is described. The beamline has been characterized by measuring and analysing static speckle patterns from isotropically disordered samples. The measured speckle widths and amplitudes are compared with a theory described herein and found to be in good agreement with its predictions.

Sandy, A.R.

1999-11-01T23:59:59.000Z

86

The BioCAT undulator beamline 18ID: A facility for biological non-crystalline diffraction and x-ray absorption spectroscopy at the APS  

SciTech Connect (OSTI)

The 18ID undulator beamline of the Biophysics Collaborative Access Team at the Advanced Photon Source, Argonne, IL, USA, is a high-performance instrument designed for, and dedicated to, the study of partially ordered and disordered biological materials using the techniques of small-angle X-ray scattering, fiber diffraction, and X-ray absorption spectroscopy. The beamline and associated instrumentation are described in detail and examples of the representative experimental results are presented.

Fischetti, R.; Stepanov, S.; Rosenbaum, G.; Barrea, R.; Black, E.; Gore, D.; Heurich, R.; Kondrashkina, E.; Kropf, A.J.; Wang, S.; Zhang, K.; Irving, T.C.; Bunker, G.B. (IIT); (Georgia)

2008-07-02T23:59:59.000Z

87

Investigation of periodic multilayers  

E-Print Network [OSTI]

Periodic multilayers of various periods were prepared according to an algorithm proposed by the authors. The reflectivity properties of these systems were investigated using neutron reflectometry.The obtained experimental results were compared with the theoretical expectations. In first approximation, the results proved the main features of the theoretical predictions. These promising results initiate further research of such systems.

Bodnarchuck, V; Ignatovich, V; Veres, T; Yaradaykin, S

2009-01-01T23:59:59.000Z

88

Monte Carlo Studies of the Radiation Fields in the Linac Coherent Light Source Undulators and of the Corresponding Signals in the Cerenkov Beam Loss Monitors  

SciTech Connect (OSTI)

In 2009 the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Center started free electron laser (FEL) operation. In order to continue to produce the bright and short-pulsed x-ray laser demanded by FEL scientists, this pioneer hard x-ray FEL requires a perfectly tailored magnetic field at the undulators, so that the photons generated at the electron wiggling path interact at the right phase with the electron beam. In such a precise system, small (>0.01%) radiation-induced alterations of the magnetic field in the permanent magnets could affect FEL performance. This paper describes the simulation studies of radiation fields in permanent magnets and the expected signal in the detectors. The transport of particles from the radiation sources (i.e. diagnostic insert) to the undulator magnets and to the beam loss monitors (BLM) was simulated with the intra nuclear cascade codes FLUKA and MARS15. In order to accurately reproduce the optics of LCLS, lattice capabilities and magnetic fields were enabled in FLUKA and betatron oscillations were validated against reference data. All electron events entering the BLMs were printed in data files. The paper also introduces the Radioactive Ion Beam Optimizer (RIBO) Monte Carlo 3-D code, which was used to read from the event files, to compute Cerenkov production and then to simulate the optical coupling of the BLM detectors, accounting for the transmission of light through the quartz.

Santana Leitner, Mario

2010-09-14T23:59:59.000Z

89

Budget Period 1  

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

Budget Period 1 Budget Period 1 Budget Period 2 Budget Period 3 0.0% 0.0% 0.0% PMC123.1 - Budget Justification for SF 424A Budget 0 Additional Explanations/Comments (as necessary) *IMPORTANT: In the space provided below (or as an attachment) provide a complete explanation and the full calculations used to derive the total indirect costs. If the total indirect costs are a cumulative amount of more than one calculation or rate application, the explanation and calculations should identify all rates used, along with the base they were applied to (and how the base was derived), and a total for each (along with grand total). The rates and how they are applied should not be averaged to get one indirect cost percentage. NOTE: The indirect rate should be applied to both the Federal Share and Recipient Cost Share.

90

Insertion devices for the Advanced Light Source at LBL  

SciTech Connect (OSTI)

The Advanced Light Source (ALS) at the Lawrence Berkeley Laboratory will be the first of the new generation of dedicated synchrotron light sources to be put into operation. Specially designed insertion devices will be required to realize the high brightness photon beams made possible by the low emittance of the electron beam. The complement of insertion devices on the ALS will include undulators with periods as short as 3.9 cm and one or more high field wigglers. The first device to be designed is a 5 m long, 5 cm period, hybrid undulator. The goal of very high brightness and high harmonic output imposes unusually tight tolerances on the magnetic field quality and thus on the mechanical structure. The design process, using a generic structure for all undulators, is described. 5 refs., 4 figs., 1 tab.

Hassenzahl, W.; Chin, J.; Halbach, K.; Hoyer, E.; Humphries, D.; Kincaid, B.; Savoy, R.

1989-03-01T23:59:59.000Z

91

Periodic pumping tests  

Science Journals Connector (OSTI)

......pumping period. The considered penetration depth (eq. 6) constitutes...well transmitted beyond the penetration depth. It is only a question...measurable. In contrast, flow rate measured at the pumping well...subsurface volume represented by penetration depth.) We cannot exclude......

Jörg Renner; Mareike Messar

2006-10-01T23:59:59.000Z

92

Effective Rate Period  

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

Fiscal Year 2014 Fiscal Year 2014 Effective Rate Period As of Beginning of the FY 10/01/2013 - 09/30/2014 Mid-Year Changes (if applicable) 10/01/2013 - 09/30/2014 Power Rates Annual Revenue Requirement Rate Schedule Power Revenue Requirement $73,441,557 CV-F13 Base Resource Revenue Requirement $69,585,875 First Preference Revenue Requirement $3,855,682

93

Ball Packings with Periodic Constraints  

Science Journals Connector (OSTI)

We call a periodic ball packing in $$d$$d-dimensional Euclidean space periodically (resp. strictly) jammed with respect to a period lattice $$\\varLambda $$¿ if there are no nontrivial motions of the balls that preserve $$\\varLambda $$¿ (resp. that maintain ... Keywords: 52C17, Ball packings, Jamming, Periodic packings, Rigidity, Tensegrities

Robert Connelly, Jeffrey D. Shen, Alexander D. Smith

2014-12-01T23:59:59.000Z

94

Ball Packings with Periodic Constraints  

E-Print Network [OSTI]

We call a periodic ball packing in d-dimensional Euclidean space periodically (strictly) jammed with respect to a period lattice if there are no nontrivial motions of the balls that preserve the period (that maintain some period with smaller or equal volume). In particular, we call a packing consistently periodically (strictly) jammed if it is periodically (strictly) jammed on every one of its periods. After extending a well-known bar framework and stress condition to strict jamming, we prove that a packing with period Lambda is consistently strictly jammed if and only if it is strictly jammed with respect to Lambda and consistently periodically jammed. We next extend a result about rigid unit mode spectra in crystallography to characterize periodic jamming on sublattices. After that, we prove that there are finitely many strictly jammed packings of m unit balls and other similar results. An interesting example shows that the size of the first sublattice on which a packing is first periodically unjammed is not bounded. Finally, we find an example of a consistently periodically jammed packing of low density \\delta = \\frac{4 \\pi}{6 \\sqrt{3} + 11} + \\epsilon ~ 0.59, where \\epsilon is an arbitrarily small positive number. Throughout the paper, the statements for the closely related notions of periodic infinitesimal rigidity and affine infinitesimal rigidity for tensegrity frameworks are also given.

Robert Connelly; Jeffrey D. Shen; Alexander D. Smith

2013-01-04T23:59:59.000Z

95

Periodicities in gamma ray bursts  

Science Journals Connector (OSTI)

Gamma ray burst models based on magnetic neutron stars face a problem of account for the scarcity of observed periods. Both this scarcity and the typical period found when any is detected are explained if the neutron stars are accreting in binary systems

Kent S. Wood

1984-01-01T23:59:59.000Z

96

Periodic  

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

04 04 by C.G. Wohl (LBNL). Adapted from the Commission of Atomic Weights and Isotopic Abundances, "Atomic Weights of the Elements 1995," Pure and Applied Chemistry 68, 2339 (1996), and G. Audi and A.H. Wapstra, "The 1993 Mass Evaluation," Nucl. Phys. A565, 1 (1993). The atomic number (top left) is the number of protons in the nucleus. The atomic mass (bottom) is weighted by isotopic abundances in the Earth's surface. For a new determination of atomic masses, not weighted by abundances, see G. Audi, A.H. Wapstra, and C. Thibault, Nucl. Phys. A729, 337 (2003). Atomic masses are relative to the mass of the carbon-12 isotope, defined to be exactly 12 unified atomic mass units (u). Errors range from 1 to 9 in the last digit quoted. Relative isotopic abundances often vary considerably, both in natural and commercial samples. A number in parentheses is the mass of the longest-lived

97

Performance Period Total Fee Paid  

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

Period Period Total Fee Paid 4/29/2012 - 9/30/2012 $418,348 10/1/2012 - 9/30/2013 $0 10/1/2013 - 9/30/2014 $0 10/1/2014 - 9/30/2015 $0 10/1/2015 - 9/30/2016 $0 Cumulative Fee Paid $418,348 Contract Type: Cost Plus Award Fee Contract Period: $116,769,139 November 2011 - September 2016 $475,395 $0 Fee Information Total Estimated Contract Cost $1,141,623 $1,140,948 $1,140,948 $5,039,862 $1,140,948 Maximum Fee $5,039,862 Minimum Fee Fee Available Portage, Inc. DE-DT0002936 EM Contractor Fee Site: MOAB Uranium Mill Tailings - MOAB, UT Contract Name: MOAB Uranium Mill Tailings Remedial Action Contract September 2013 Contractor: Contract Number:

98

Periodic ripples in suspended graphene  

Science Journals Connector (OSTI)

We study the mechanism of wrinkling of suspended graphene, by means of atomistic simulations. We argue that the structural instability under edge compression is the essential physical reason for the formation of periodic ripples in graphene. The ripple wavelength and out-of-plane amplitude are found to obey 1/4-power scaling laws with respect to edge compression. Our results also show that parallel displacement of the clamped boundaries can induce periodic ripples, with oscillation amplitude roughly proportional to the 1/4 power of edge displacement.

Zhao Wang and Michel Devel

2011-03-23T23:59:59.000Z

99

Down hole periodic seismic generator  

DOE Patents [OSTI]

A down hole periodic seismic generator system for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

Hardee, Harry C. (Albuquerque, NM); Hills, Richard G. (Las Cruces, NM); Striker, Richard P. (Albuquerque, NM)

1989-01-01T23:59:59.000Z

100

Advanced downhole periodic seismic generator  

DOE Patents [OSTI]

An advanced downhole periodic seismic generator system for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

Hardee, Harry C. (Albuquerque, NM); Hills, Richard G. (Las Cruces, NM); Striker, Richard P. (Albuquerque, NM)

1991-07-16T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Construction of a New VUV/Soft X-ray Undulator Beamline BL-13A in the Photon Factory for Study of Organic Thin Films and Biomolecules Adsorbed on Surfaces  

SciTech Connect (OSTI)

A planar undulator beamline, BL-13A, covering 30-1,000 eV has been constructed in the Photon Factory. The main scientific targets are investigations of organic thin films and biomolecules adsorbed on well-defined surfaces using angle-resolved photoelectron spectroscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy. A variable-included-angle Monk-Gillieson mounting monochromator with varied-line-spacing plane gratings is used to achieve a high photon flux of 10{sup 10}-10{sup 12} photons/s with a high resolution (E/{Delta}E) of 7,000-30,000. A typical spot size on the sample position is estimated to be 130 {mu}m (horizontal)x40 {mu}m (vertical). After commissioning, BL-13A will be open for users from January 2010.

Mase, Kazuhiko; Toyoshima, Akio; Kikuchi, Takashi; Tanaka, Hirokazu; Amemiya, Kenta; Ito, Kenji [Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)

2010-06-23T23:59:59.000Z

102

Long-Period Solar Variability  

SciTech Connect (OSTI)

Terrestrial climate records and historical observations of the Sun suggest that the Sun undergoes aperiodic oscillations in radiative output and size over time periods of centuries and millenia. Such behavior can be explained by the solar convective zone acting as a nonlinear oscillator, forced at the sunspot-cycle frequency by variations in heliomagnetic field strength. A forced variant of the Lorenz equations can generate a time series with the same characteristics as the solar and climate records. The timescales and magnitudes of oscillations that could be caused by this mechanism are consistent with what is known about the Sun and terrestrial climate.

GAUTHIER,JOHN H.

2000-07-20T23:59:59.000Z

103

Clean-in-Place and Reliability Testing of a Commercial 12.5 cm Annular Centrifugal Contactor at the INL  

SciTech Connect (OSTI)

The renewed interest in advancing nuclear energy has spawned the research of advanced technologies for recycling nuclear fuel. A significant portion of the advanced fuel cycle includes the recovery of selected actinides by solvent extraction methods utilizing centrifugal contactors. Although the use of centrifugal contactors for solvent extraction is widely known, their operation is not without challenges. Solutions generated from spent fuel dissolution contain unknown quantities of undissolved solids. A majority of these solids will be removed via various methods of filtration. However, smaller particles are expected to carry through to downstream solvent extraction processes and equipment. In addition, solids/precipitates brought about by mechanical or chemical upsets are another potential area of concern. During processing, particulate captured in the rotor assembly by high centrifugal forces eventually forms a cake-like structure on the inner wall introducing balance problems and negatively affecting phase separations. One of the features recently developed for larger engineering scale Annular Centrifugal Contactors (ACCs) is the Clean-In-Place (CIP) capability. Engineered spray nozzles were installed into the hollow central rotor shaft in all four quadrants of the rotor assembly. This arrangement allows for a very convenient and effective method of solids removal from within the rotor assembly.

N. R. Mann; T. G. Garn; D. H. Meikrantz; J. D. Law; T. A. Todd

2007-09-01T23:59:59.000Z

104

New subdwarf B star periods  

E-Print Network [OSTI]

Subdwarf B (sdB) stars are thought to be helium burning stars with low mass hydrogen envelopes. Several evolutionary paths have been proposed to explain the formation of these systems. One of these scenarios is the evolution of the sdB progenitor within a binary system. We have looked systematically at bright sdB stars from the PG survey. By taking spectra at several different epochs we have measured the radial velocity shifts caused by the motion of the sdB star within the binary. Our data have been taken over a long time base line (2 years) which allowed us to find longer period binaries than known before. Here we present results for 29 sdB systems.

L. Morales-Rueda; P. F. L. Maxted; T. R. Marsh; R. C. North

2002-09-26T23:59:59.000Z

105

Polariton dispersion of periodic quantum well structures  

Science Journals Connector (OSTI)

We studied the polariton dispersion relations of a periodic quantum-well structure with a period in the vicinity of half the exciton resonance wavelength, i.e., the Bragg structure. We classified polariton mod...

A. V. Mintsev; L. V. Butov; C. Ell; S. Mosor…

2002-11-01T23:59:59.000Z

106

SES Probationary Period | Department of Energy  

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

SES Probationary Period SES Probationary Period SES Probationary Period An individual's initial appointment as an SES career appointee becomes final only after the individual has served a 1-year probationary period as a career appointee. That employee's rating official must perform an assessment of the new SES's performance during the probationary period. After the one year the selecting official must certify that the appointee performed at the level of excellence expected of a senior executive during the probationary period. When a career appointee's executive qualification have been certified by a Qualifications Review Board on the basis of special or unique qualities, as described in Sec. 317.502(c), the probationary assessment must address any executive development activities the agency identified in support of the

107

Periodic wave solutions of the Boussinesq equation  

Science Journals Connector (OSTI)

The Boussinesq equation usually arises in a physical problem as a long wave equation. The present work extends the search of periodic wave solutions for it. The Hirota bilinear method and Riemann theta function are employed in the process. We also analyse the asymptotic property of periodic waves in detail. Furthermore, it is of interest to note that well-known soliton solutions can be reduced from the periodic wave solutions.

Yi Zhang; Ling-ya Ye; Yi-neng Lv; Hai-qiong Zhao

2007-01-01T23:59:59.000Z

108

PARS II Process Document – DOE Period Close  

Broader source: Energy.gov [DOE]

This document details the process adopted by the Office of Acquisition and Project Management to prepare APM DepSec Monthly Status Report, finalize DOE close period package, and perform reporting...

109

EIS-0504: Notice of Extension of Scoping Period | Department...  

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

Extension of Scoping Period EIS-0504: Notice of Extension of Scoping Period Gulf LNG Liquefaction Project, Jackson County, Mississippi FERC extended the scoping period to September...

110

Lengthening the Storage Period of Cucumbers.  

E-Print Network [OSTI]

TEXAS AGRICULTURAL EXPERIMENT STATION A. B. CONNER, DIRECTOR COLLEGE STATION, BRAZOS COUNTY, TEXAS BULLETIN NO. 576 AUGUST 1939 DIVISION OF RURAL HOME RESEARCH AND DIVISION OF HORTICULTURE 1NGTHENING THE STORAGE PERIOD OF CUCUMBERS..., in common storage. Consid- ering only loss of weight the period of common storage was increased from 1 to 7 weeks. When other factors such as palatability are taken into account, M. T. Cellophane wrapped cucumbers remained in good condition only about 10...

Hawthorn, L. R. (Leslie Rushton); Whitacre, Jessie (Jessie Opal); Yarnell, S. H. (Sidney Howe)

1939-01-01T23:59:59.000Z

111

High?frequency cutoff periodic dielectric waveguides  

Science Journals Connector (OSTI)

We report high?frequency cutoff in periodic dielectric waveguides. The guides consisted of 1?? photoresist film with a surface corrugation of up to 500 Å overlaid on fused silica substrates. At a wavelength of 1.064 ? we obtained transition between complete cutoff and propagation by variation in the periodicity of the guide of ± 30 Å. For gratings having 500?Å corrugation unobstructed propagation at 1.32 ? occurred with complete stopping of 1.064?? light.

F.W. Dabby; M.A. Saifi; A. Kestenbaum

1973-01-01T23:59:59.000Z

112

Property:TimePeriod | Open Energy Information  

Open Energy Info (EERE)

TimePeriod TimePeriod Jump to: navigation, search This is a property of type String. Pages using the property "TimePeriod" Showing 25 pages using this property. (previous 25) (next 25) 0 0.4 kV remote control (Smart Grid Project) + Not available + 2 220 kV SSSC device for power flow control (Smart Grid Project) + Jul 2009 Jul 2014 + A A complete and normalized 61850 substation (Smart Grid Project) + Oct 2009 Dec 2015 + ADELE Project AACAES (Smart Grid Project) + Dec 2009 Dec 2013 + AFTER A Framework for electrical power sysTems vulnerability identification, dEfense and Restoration (Smart Grid Project) + 2011-2014 + AFTER A Framework for electrical power sysTems vulnerability identification, dEfense and Restoration (Smart Grid Project) (Belgium) + 2011-2014 +

113

The periodic spectroscopic variability of FU Orionis  

Science Journals Connector (OSTI)

......the emergence of the energy liberated by accretion...of the central star in solar masses. The maximum...is the stellar mass in solar masses. Even in the...this could represent an economical solution to the two period...Associations and the Solar Vicinity. Kluwer, Dordrecht......

Stacie L. Powell; Mike Irwin; Jerome Bouvier; Cathie J. Clarke

2012-11-11T23:59:59.000Z

114

Coherency saturation in periodic structures with randomization  

E-Print Network [OSTI]

,28 or multicascade stimulated Raman scattering.29­31 A major example of naturally occurring spatially periodic with very reasonable precision. In the specific case of x ray transition radiation of low layers can generate resonantly enhanced radiation in the hard x ray domain with almost unhampered

Kaplan, Alexander

115

Broadband solar absorption enhancement via periodic  

E-Print Network [OSTI]

Broadband solar absorption enhancement via periodic nanostructuring of electrodes Michael M. Adachi Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario M5S 3G4, Canada, 2 Province, 230009, P. R. China. Solution processed colloidal quantum dot (CQD) solar cells have great

116

Property:Maximum Wave Height(m) at Wave Period(s) | Open Energy Information  

Open Energy Info (EERE)

Wave Height(m) at Wave Period(s) Wave Height(m) at Wave Period(s) Jump to: navigation, search Property Name Maximum Wave Height(m) at Wave Period(s) Property Type String Pages using the property "Maximum Wave Height(m) at Wave Period(s)" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + 10.0 + 10-ft Wave Flume Facility + 10.0 + 11-ft Wave Flume Facility + 10.0 + 2 2-ft Flume Facility + 10.0 + 3 3-ft Wave Flume Facility + 10.0 + 5 5-ft Wave Flume Facility + 10.0 + 6 6-ft Wave Flume Facility + 10.0 + A Alden Large Flume + 0.0 + Alden Wave Basin + 1.0 + C Chase Tow Tank + 3.1 + Coastal Harbors Modeling Facility + 2.3 + Coastal Inlet Model Facility + 2.3 + D Davidson Laboratory Tow Tank + 4.0 + DeFrees Large Wave Basin + 3.0 + DeFrees Small Wave Basin + 3.0 +

117

Undulating strings and gauge theory waves  

Science Journals Connector (OSTI)

We study some dynamical aspects of the correspondence between strings in AdS space and external heavy quarks in N=4 SYM. Specifically, by examining waves propagating on such strings, we make some plausible (and some surprising) inferences about the time-dependent fields produced by oscillating quarks in the strongly coupled gauge theory. We point out a puzzle regarding energy conservation in the SYM theory. In addition, we perform a similar analysis of the gauge fields produced by a baryon (represented as a D5-brane with string-like extension in AdS space) and compare and contrast with the gauge fields produced by a quark–antiquark pair (represented as a string looping through AdS space).

Curtis G. Callan; Jr; Alberto Güijosa

2000-01-01T23:59:59.000Z

118

Embedding a chaotic signature in a periodic train: can periodic signals be chaotic?  

E-Print Network [OSTI]

We show how a chaotic system can be locked to emit a periodic waveform belonging to its chaotic attractor. We numerically demonstrate our idea in a system composed of a semiconductor laser driven to chaos by optical feedback from a short external cavity. The clue is the injection of an appropriate periodic signal that modulates the phase and amplitude of the intra-cavity radiation, a chaotic analogy of conventional mode-locking. The result is a time process that manifests a chaotic signature embedded in a long-scale periodic train.

Antonio Mecozzi; Cristian Antonelli

2008-12-11T23:59:59.000Z

119

Transition Period High Water Marks - May 2009.indd  

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

Period High Water Marks (THWMs) and Above-Rate-Period High Water Mark (Above-RHWM) load data for the transition period for all customers with a CHWM contract. The transition...

120

Forward period analysis and the long term simulation of a periodic Hamiltonian system  

E-Print Network [OSTI]

The period of a Morse oscillator and mathematical pendulum system are obtained, accurate to 100 significant digits, by forward period analysis (FPA). From these results, the long-term [0, 10^60] (time unit) solutions, which overlap from the Planck time to the age of the universe, are computed reliably and quickly with a parallel multiple-precision Taylor series (PMT) scheme. The application of FPA to periodic systems can reduce the computation loops of long-term reliable simulation from O(t^(1+1/M)) to O(lnt+t/h0) where T is the period, M the order and h0 a constant step-size. This scheme provides a way to generate reference solutions to test other schemes' long-term simulations.

Pengfei Wang

2014-10-23T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

EIS-0403: Notice to Extend Public Comment Period | Department...  

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

to Extend Public Comment Period EIS-0403: Notice to Extend Public Comment Period Solar Energy Development in Six Southwestern States The Department of Energy and the Bureau of...

122

EA-1566: Notice of Comment Period Extension | Department of Energy  

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

EA-1566: Notice of Comment Period Extension Proposed Infrastructure Improvements for the Yucca Mountain Project, Nevada DOE is extending the public comment period for the Yucca...

123

Emissions from Idling Trucks for Extended Time Periods | Department...  

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

Idling Trucks for Extended Time Periods Emissions from Idling Trucks for Extended Time Periods 2002 DEER Conference Presentation: Oak Ridge National Laboratory 2002deerlewis.pdf...

124

EA-1919: Notice of Public Comment Period Extension | Department...  

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

of Public Comment Period Extension EA-1919: Notice of Public Comment Period Extension Recycling of Scrap Metals Originating from Radiological Areas DOE has extended the public...

125

PARS II Process Document - DOE Period Close | Department of Energy  

Office of Environmental Management (EM)

by the Office of Acquisition and Project Management to prepare APM DepSec Monthly Status Report, finalize DOE close period package, and perform reporting period close...

126

Down-hole periodic seismic generator  

DOE Patents [OSTI]

A down hole periodic seismic generator system is disclosed for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

Hardee, H.C.; Hills, R.G.; Striker, R.P.

1982-10-28T23:59:59.000Z

127

Prime power subgroups in certain periodic groups  

E-Print Network [OSTI]

P$38E POlfRR SU89%(UPS IM CENPTAI? PERIODIC QROU1'8 A Thee1 ~ ~Ra Paalllae kxeendaria Lpptoved aa to style and oontent by& 6. P. Chairaen of Coaalttee C. c. aden visor a of epee teen t The author wishes to express his gratitude... groups will serve as a starting point. LENMA 1. 1. Let 0 be a group not the 1dentity alone. Then 0 has no proper subgroups 1f and only if 0 is s finite oyolio group of prime order. Suppose that 0 is a finite oyolio group of prime order p...

Armendariz, Efraim Pacillas

2012-06-07T23:59:59.000Z

128

On a periodicity measure and superoscillations  

E-Print Network [OSTI]

The phenomenon of superoscillation, where band limited signals can oscillate over some time period with a frequency higher than the band limit, is not only very interesting but it also seems to offer many practical applications. The first reason is that the superoscillation frequency can be exploited to perform tasks beyond the limits imposed by the lower bandwidth of the signal. The second reason is that it is generic and applies to any wave form, be it optical, electrical, sonic, or quantum mechanical. For practical applications, it is important to overcome two problems. The first problem is that an overwhelming proportion of the energy goes into the non superoscillating part of the signal. The second problem is the control of the shape of the superoscillating part of the signal. The first problem has been recently addressed by optimization of the super oscillation yield, the ratio of the energy in the superoscillations to the total energy of the signal. The second problem may arise when the superoscillation, is to mimic a high frequency purely perodic signal. This may be required, for example, when a superoscillating force is to drive a harmonic oscillator at a high resonance frequency. In this paper the degree of periodicity of a signal is defined and applied to some yield optimized superoscillating signals.

Nehemia Schwartz; Moshe Schwartz

2014-02-13T23:59:59.000Z

129

Electromagnetic Siegert states for periodic dielectric structures  

E-Print Network [OSTI]

The formalism of Siegert states to describe the resonant scattering in quantum theory is extended to the resonant scattering of electromagnetic waves on periodic dielectric arrays. The excitation of electromagnetic Siegert states by an incident wave packet and their decay is studied. The formalism is applied to develop a theory of coupled electromagnetic resonances arising in the electromagnetic scattering problem for two such arrays separated by a distance 2h (or, generally, when the physical properties of the scattering array depend on a real coupling parameter h). Analytic properties of Siegert states as functions of the coupling parameter h are established by the Regular Perturbation Theorem which is an extension the Kato-Rellich theorem to the present case. By means of this theorem, it is proved that if the scattering structure admits a bound state in the radiation continuum at a certain value of the coupling parameter h, then there always exist regions within the structure in which the near field can be amplified as much as desired by adjusting the value of h. This establishes a rather general mechanism to control and amplify optical nonlinear effects in periodically structured planar structures possessing a nonlinear dielectric susceptibility.

Friends R. Ndangali; Sergei V. Shabanov

2011-08-09T23:59:59.000Z

130

LS-29  

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

s. H. Kim 7/19/85 Nouideal Undulator Spect.ra The undulator spectra may have harmonic broadening due to the angular divergence and energy spread of the electron beam in the storage ~ing, varia- tion of the undulator spatial period, and nonideal magnetic field distribution between the gap of the undulator. In most cases the energy spread of the electron beam seems to be rather small. The correction of the nonuniformity of the undulator period may be easier compared to that of the magnetic field distribution in an undulator. This note calculates the undulator spectra under the following assump- tions. The electron beam has divergences in the horizontal and vertical directions with an overall Gaussian distribution of the divergence. The undulator period is constant and magnetic field distribution is sinusoidal

131

Mo Year Report Period: EIA ID NUMBER:  

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

Version No: 2013.01 Mo Year Report Period: EIA ID NUMBER: http://www.eia.gov/survey/form/eia_14/instructions.pdf Mailing Address: Secure File Transfer option available at: (e.g., PO Box, RR) https://signon.eia.doe.gov/upload/noticeoog.jsp Electronic Transmission: The PC Electronic Zip Code - Data Reporting Option (PEDRO) is available. If interested in software, call (202) 586-9659. Email form to: OOG.SURVEYS@eia.doe.gov - - - - Fax form to: (202) 586-9772 Mail form to: Oil & Gas Survey Email address: U.S. Department of Energy Ben Franklin Station PO Box 279 Washington, DC 20044-0279 Questions? Call toll free: 1-800-638-8812 PADD 4 Type of Report (Check One ): (Thousands of dollars) (Thousands of barrels) PADD 2 PADD 3 PAD DISTRICT (a) Revision to Report:

132

Steady periodic gravity waves with surface tension  

E-Print Network [OSTI]

In this paper we consider two-dimensional, stratified, steady water waves propagating over an impermeable flat bed and with a free surface. The motion is assumed to be driven by capillarity (that is, surface tension) on the surface and a gravitational force acting on the body of the fluid. We prove the existence of global continua of classical solutions that are periodic and traveling. This is accomplished by first constructing a 1-parameter family of laminar flow solutions, $\\mathcal{T}$, then applying bifurcation theory methods to obtain local curves of small amplitude solutions branching from $\\mathcal{T}$ at an eigenvalue of the linearized problem. Each solution curve is then continued globally by means of a degree theoretic theorem in the spirit of Rabinowitz. Finally, we complement the degree theoretic picture by proving an alternate global bifurcation theorem via the analytic continuation method of Dancer.

Samuel Walsh

2009-11-06T23:59:59.000Z

133

Performance Period Total Fee Paid FY2001  

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

01 01 $4,547,400 FY2002 $4,871,000 FY2003 $6,177,902 FY2004 $8,743,007 FY2005 $13,134,189 FY2006 $7,489,704 FY2007 $9,090,924 FY2008 $10,045,072 FY2009 $12,504,247 FY2010 $17,590,414 FY2011 $17,558,710 FY2012 $14,528,770 Cumulative Fee Paid $126,281,339 Cost Plus Award Fee DE-AC29-01AL66444 Washington TRU Solutions LLC Contractor: Contract Number: Contract Type: $8,743,007 Contract Period: $1,813,482,000 Fee Information Maximum Fee $131,691,744 Total Estimated Contract Cost: $4,547,400 $4,871,000 $6,177,902 October 2000 - September 2012 Minimum Fee $0 Fee Available EM Contractor Fee Site: Carlsbad Field Office - Carlsbad, NM Contract Name: Waste Isolation Pilot Plant Operations March 2013 $13,196,690 $9,262,042 $10,064,940 $14,828,770 $12,348,558 $12,204,247 $17,590,414 $17,856,774

134

Effects of periodic matter in kaon regeneration  

E-Print Network [OSTI]

We study the effects of periodic matter in kaon regeneration, motivated by the possibility of parametric resonance in neutrino oscillations. The large imaginary parts of the forward kaon-nucleon scattering amplitudes and the decay width difference $\\Delta\\Gamma$ prevent a sizable enhancement of the $K_L\\to K_S$ transition probability. However, some interesting effects can be produced using regenerators made of alternating layers of two different materials. Despite the fact that the regenerator has a fixed length one can obtain different values for the probability distribution of the $K_L$ decay into a final state. Using a two-arm regenerator set up it is possible to measure the imaginary parts of the $K^0(\\bar{K}^0)$-nucleon scattering amplitudes in the correlated decays of the $\\phi$-resonance. Combining the data of the single-arm regenerator experiments with direct and reverse orders of the matter layers in the regenerator one can independently measure the CP violating parameter $\\delta$.

Evgeny Akhmedov; Augusto Barroso; Petteri Keränen

2001-07-23T23:59:59.000Z

135

Superconvergence of period doubling cascade in trapezoid maps  

E-Print Network [OSTI]

In the symmetric and the asymmetric trapezoid maps, as a slope of the trapezoid is increased, the period doubling cascade occurs and the symbolic sequence of periodic points is the Metropolis-Stein-Stein sequence and the convergence of the onset point of the period 2^m solution to the accumulation point is exponentially fast. We reported these results previously. In this paper, we give the detailed description of the proof on the results. Further, we study the period doubling cascade starting from period p solution and show the superconvergence of the period doubling cascade.

T. Uezu

2000-01-12T23:59:59.000Z

136

PERIOD ERROR ESTIMATION FOR THE KEPLER ECLIPSING BINARY CATALOG  

SciTech Connect (OSTI)

The Kepler Eclipsing Binary Catalog (KEBC) describes 2165 eclipsing binaries identified in the 115 deg{sup 2} Kepler Field based on observations from Kepler quarters Q0, Q1, and Q2. The periods in the KEBC are given in units of days out to six decimal places but no period errors are provided. We present the PEC (Period Error Calculator) algorithm, which can be used to estimate the period errors of strictly periodic variables observed by the Kepler Mission. The PEC algorithm is based on propagation of error theory and assumes that observation of every light curve peak/minimum in a long time-series observation can be unambiguously identified. The PEC algorithm can be efficiently programmed using just a few lines of C computer language code. The PEC algorithm was used to develop a simple model that provides period error estimates for eclipsing binaries in the KEBC with periods less than 62.5 days: log {sigma}{sub P} Almost-Equal-To - 5.8908 + 1.4425(1 + log P), where P is the period of an eclipsing binary in the KEBC in units of days. KEBC systems with periods {>=}62.5 days have KEBC period errors of {approx}0.0144 days. Periods and period errors of seven eclipsing binary systems in the KEBC were measured using the NASA Exoplanet Archive Periodogram Service and compared to period errors estimated using the PEC algorithm.

Mighell, Kenneth J. [National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States); Plavchan, Peter [NASA Exoplanet Science Institute, California Institute of Technology, Pasadena, CA 91125 (United States)

2013-06-15T23:59:59.000Z

137

LS-16 S. Kim  

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

S. Kim March 20, 1985 Parameters and Spectral Brilliance of the Aladdin Undulators This note shows tunable ranges of photon energies and the brilliances for different undulator periods and electron beam parameters. 1. Undulator Parameter Undulator parameters of Table 1 are generated with a minimum gap of 3.5 em and with a peak field B on the axis of the undulator where B 1.30 x 0.95 exp(- ng/A u )' undulator gap, undulator period. (1) Here a filling factor for the assembly of the undulator is assumed to be 95%. 2. Electron Beam Parameter The horizontal and vertical beam emittances are determined by a coupling constant K2 and natural emittance £xo: ~ / (1 + K2), c.. xo Parameters of beam size and beam divergence are related as = (6 £ )1/2 x,y ,

138

EIS-0403: Public Comment Period Extension | Department of Energy  

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

403: Public Comment Period Extension 403: Public Comment Period Extension EIS-0403: Public Comment Period Extension Solar Energy Development in Six Southwestern States The Bureau of Land Management (BLM) announced a two-week extension of the public comment period for the Draft Solar Programmatic Environmental Impact Statement (Draft Solar PEIS), a joint effort with the Department of Energy. The agencies had previously provided for a 120-day public comment period on the Draft Solar PEIS. Because of numerous requests, the agencies extended the comment period by an additional two weeks beyond April 16, 2011. The comment period ran (with extension) until May 2, 2011. EIS-0403-DEIS_Second_Comment_Extension-2011.pdf More Documents & Publications EIS-0403: Notice to Extend Public Comment Period

139

An Investigation into Solar Wind Plasma Periodicities Karolen I. Paularena  

E-Print Network [OSTI]

An Investigation into Solar Wind Plasma Periodicities Karolen I. Paularena Center for Space Research, Massachusetts Institute of Technology, Cambridge, Massachusetts Received ; accepted To be submitted to Journal of Geophysical Research, 1996. Short title: SOLAR WIND PLASMA PERIODICITIES #12

Richardson, John

140

Recommendation 186: Option Periods in Prime Contract Language  

Broader source: Energy.gov [DOE]

The inclusion of option periods in the language of all future DOE Request for Proposals for prime contracts when appropriate.

Note: This page contains sample records for the topic "5-cm period undulator" 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

Beamline 8.0.1  

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

0.1 0.1 Beamline 8.0.1 Print Tuesday, 20 October 2009 08:51 Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE)

142

Beamline 7.0.1  

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

0.1 Print 0.1 Print Surface and Materials Science, Spectromicroscopy Scientific disciplines: Correlated electron system, materials science Endstations: nanoARPES (nARPES) Electronic Structure Factory (ESF) Advanced x-ray inelastic scattering (AXIS) GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range See endstation tables Monochromator See endstation tables Scientific disciplines Correlated electron system, materials science Website Beamline 7: http://www-bl7.lbl.gov/ ENDSTATION INFORMATION Endstation name nanoARPES Operational This instrument is currently under development. Expected user operation in 2012. For consideration, speak to the beamline scientist before applying for beamtime.

143

Beamline 7.0.1  

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

0.1 Print 0.1 Print Surface and Materials Science, Spectromicroscopy Scientific disciplines: Correlated electron system, materials science Endstations: nanoARPES (nARPES) Electronic Structure Factory (ESF) Advanced x-ray inelastic scattering (AXIS) GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range See endstation tables Monochromator See endstation tables Scientific disciplines Correlated electron system, materials science Website Beamline 7: http://www-bl7.lbl.gov/ ENDSTATION INFORMATION Endstation name nanoARPES Operational This instrument is currently under development. Expected user operation in 2012. For consideration, speak to the beamline scientist before applying for beamtime.

144

Beamline 8.0.1  

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

0.1 0.1 Beamline 8.0.1 Print Tuesday, 20 October 2009 08:51 Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE)

145

Beamline 7.0.1  

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

0.1 Print 0.1 Print Surface and Materials Science, Spectromicroscopy Scientific disciplines: Correlated electron system, materials science Endstations: nanoARPES (nARPES) Electronic Structure Factory (ESF) Advanced x-ray inelastic scattering (AXIS) GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range See endstation tables Monochromator See endstation tables Scientific disciplines Correlated electron system, materials science Website Beamline 7: http://www-bl7.lbl.gov/ ENDSTATION INFORMATION Endstation name nanoARPES Operational This instrument is currently under development. Expected user operation in 2012. For consideration, speak to the beamline scientist before applying for beamtime.

146

Beamline 7.0.1  

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

0.1 Print 0.1 Print Surface and Materials Science, Spectromicroscopy Scientific disciplines: Correlated electron system, materials science Endstations: nanoARPES (nARPES) Electronic Structure Factory (ESF) Advanced x-ray inelastic scattering (AXIS) GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range See endstation tables Monochromator See endstation tables Scientific disciplines Correlated electron system, materials science Website Beamline 7: http://www-bl7.lbl.gov/ ENDSTATION INFORMATION Endstation name nanoARPES Operational This instrument is currently under development. Expected user operation in 2012. For consideration, speak to the beamline scientist before applying for beamtime.

147

Beamline 7.0.1  

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

7.0.1 Print 7.0.1 Print Surface and Materials Science, Spectromicroscopy Scientific disciplines: Correlated electron system, materials science Endstations: nanoARPES (nARPES) Electronic Structure Factory (ESF) Advanced x-ray inelastic scattering (AXIS) GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range See endstation tables Monochromator See endstation tables Scientific disciplines Correlated electron system, materials science Website Beamline 7: http://www-bl7.lbl.gov/ ENDSTATION INFORMATION Endstation name nanoARPES Operational This instrument is currently under development. Expected user operation in 2012. For consideration, speak to the beamline scientist before applying for beamtime.

148

Beamline 7.0.1  

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

0.1 Print 0.1 Print Surface and Materials Science, Spectromicroscopy Scientific disciplines: Correlated electron system, materials science Endstations: nanoARPES (nARPES) Electronic Structure Factory (ESF) Advanced x-ray inelastic scattering (AXIS) GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range See endstation tables Monochromator See endstation tables Scientific disciplines Correlated electron system, materials science Website Beamline 7: http://www-bl7.lbl.gov/ ENDSTATION INFORMATION Endstation name nanoARPES Operational This instrument is currently under development. Expected user operation in 2012. For consideration, speak to the beamline scientist before applying for beamtime.

149

Beamline 7.0.1  

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

0.1 Print 0.1 Print Surface and Materials Science, Spectromicroscopy Scientific disciplines: Correlated electron system, materials science Endstations: nanoARPES (nARPES) Electronic Structure Factory (ESF) Advanced x-ray inelastic scattering (AXIS) GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range See endstation tables Monochromator See endstation tables Scientific disciplines Correlated electron system, materials science Website Beamline 7: http://www-bl7.lbl.gov/ ENDSTATION INFORMATION Endstation name nanoARPES Operational This instrument is currently under development. Expected user operation in 2012. For consideration, speak to the beamline scientist before applying for beamtime.

150

EIS-0463: Extension of Scoping Period | Department of Energy  

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

Extension of Scoping Period Extension of Scoping Period EIS-0463: Extension of Scoping Period Presidential Permit Application for Northern Pass Transmission, New Hampshire The U.S. Department of Energy (DOE) is reopening the public scoping period for the Northern Pass Transmission Line Project Environmental Impact Statement (EIS) (DOE/EIS-0463). In anticipation of additional alternative route information being provided by Northern Pass, DOE is reopening the scoping period. DOE will determine the close of the scoping period once the additional routing information is received from Northern Pass, and DOE will provide at least 45 days for public review and scoping comments on any such routing information. EIS-0463-ScopingExtension-2011.pdf More Documents & Publications Application for presidential permit OE Docket No. PP-371 Northern Pass

151

EIS-0463: Reopening of Scoping Period for the Environmental Impact  

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

Reopening of Scoping Period for the Environmental Impact Reopening of Scoping Period for the Environmental Impact Statement EIS-0463: Reopening of Scoping Period for the Environmental Impact Statement Northern Pass Transmission Line Project The U.S. Department of Energy (DOE) is reopening the public scoping period for the Northern Pass Transmission Line Project Environmental Impact Statement (EIS) (DOE/EIS-0463). The scoping period now ends on June 14, 2011. Reopening of Scoping Period for the Northern Pass Transmission Line Project Environmental Impact Statement, EIS-0463 (April 2011) (76 FR 21338) More Documents & Publications EIS-0385: EPA Notice of Availability of the Final Environmental Impact Statement EIS-0425: EPA Notice of Availability of Draft Environmental Impact Statement EIS-0448: Notice of Adoption of an Environmental Impact Statement

152

EIS-0463: Reopening of Scoping Period for the Environmental Impact  

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

463: Reopening of Scoping Period for the Environmental Impact 463: Reopening of Scoping Period for the Environmental Impact Statement EIS-0463: Reopening of Scoping Period for the Environmental Impact Statement Northern Pass Transmission Line Project The U.S. Department of Energy (DOE) is reopening the public scoping period for the Northern Pass Transmission Line Project Environmental Impact Statement (EIS) (DOE/EIS-0463). The scoping period now ends on June 14, 2011. Reopening of Scoping Period for the Northern Pass Transmission Line Project Environmental Impact Statement, EIS-0463 (April 2011) (76 FR 21338) More Documents & Publications EIS-0385: EPA Notice of Availability of the Final Environmental Impact Statement EIS-0408: DOE Notice of Availability of a Programmatic Draft Environmental Impact Statement EIS-0469: Notice of Intent To Prepare an Environmental Impact Statement and

153

Can Bohmian trajectories account for quantum recurrences having classical periodicities?  

E-Print Network [OSTI]

Quantum systems in specific regimes display recurrences at the period of the periodic orbits of the corresponding classical system. We investigate the excited hydrogen atom in a magnetic field -- a prototypical system of 'quantum chaos' -- from the point of view of the de Broglie Bohm (BB) interpretation of quantum mechanics. The trajectories predicted by BB theory are computed and contrasted with the time evolution of the wavefunction, which shows pronounced features at times matching the period of closed orbits of the classical hydrogen in a magnetic field problem. Individual BB trajectories do not possess these periodicities and cannot account for the quantum recurrences. These recurrences can however be explained by BB theory by considering the ensemble of trajectories compatible with an initial statistical distribution, although none of the trajectories of the ensemble are periodic, rendering unclear the dynamical origin of the classical periodicities.

A. Matzkin

2006-07-14T23:59:59.000Z

154

EIS-0489: Notice of Comment Period Extension and Additional Scoping...  

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

Meetings EIS-0489: Notice of Comment Period Extension and Additional Scoping Meetings Jordan Cove Liquefaction Project (Coos County, OR) and Pacific Connector Pipeline Project...

155

Guidance on the Required Period for Grantees to Obligate Funds...  

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

on the Required Period for Grantees to Obligate Funds and the Procedures for Reporting of Obligated Funds for the Energy Efficiency Conservation Block Grant (EECBG) Program...

156

DURING THIS REPORTING PERIOD, WE ISSUED 45 REPORTS; IDENTIFIED...  

Energy Savers [EERE]

components that have a limited lifetime due to their use of tritium, a radioactive gas which decays over time. Periodic replacement of these components is necessary to...

157

EIS-0369: Notice of Public Comment Period Extension and Additional...  

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

Notice of Public Comment Period Extension and Additional Public Meeting Supplemental Yucca Mountain Rail Corridor and Rail Alignment The Department of Energy is now announcing...

158

Green's function analysis of periodic structures in computational electromagnetics  

E-Print Network [OSTI]

the two-dimensional periodic Green's function," IEEE Trans.evaluation of the Green's function for the Helmholtzrepresentations of certain Green's functions," J. Comp.

Van Orden, Derek

2011-01-01T23:59:59.000Z

159

Microsoft Word - PARS II Process Document - Close Period 2013...  

Office of Environmental Management (EM)

the process of preparing the APM Deputy Secretary Monthly Report and closing the DOE Reporting Period in PARS II. SCOPE This process applies to the Headquarters Office of...

160

Periodic Boundary Conditions in the ALEGRA Finite Element Code  

SciTech Connect (OSTI)

This document describes the implementation of periodic boundary conditions in the ALEGRA finite element code. ALEGRA is an arbitrary Lagrangian-Eulerian multi-physics code with both explicit and implicit numerical algorithms. The periodic boundary implementation requires a consistent set of boundary input sets which are used to describe virtual periodic regions. The implementation is noninvasive to the majority of the ALEGRA coding and is based on the distributed memory parallel framework in ALEGRA. The technique involves extending the ghost element concept for interprocessor boundary communications in ALEGRA to additionally support on- and off-processor periodic boundary communications. The user interface, algorithmic details and sample computations are given.

AIDUN,JOHN B.; ROBINSON,ALLEN C.; WEATHERBY,JOE R.

1999-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Dual periodicities in the rotational modulation of Saturn narrowband emissions  

E-Print Network [OSTI]

Dual periodicities in the rotational modulation of Saturn narrowband emissions S.Y. Ye,1 D. A emissions is examined, restricting the spacecraft location to either the northern or the southern hemisphere of Saturn. It is found that in both hemispheres, the modulation period of 5 kHz narrowband emissions has two

Gurnett, Donald A.

162

Quantum coherent switch utilizing commensurate nanoelectrode and charge density periodicities  

DOE Patents [OSTI]

A quantum coherent switch having a substrate formed from a density wave (DW) material capable of having a periodic electron density modulation or spin density modulation, a dielectric layer formed onto a surface of the substrate that is orthogonal to an intrinsic wave vector of the DW material; and structure for applying an external spatially periodic electrostatic potential over the dielectric layer.

Harrison, Neil (Santa Fe, NM); Singleton, John (Los Alamos, NM); Migliori, Albert (Santa Fe, NM)

2008-08-05T23:59:59.000Z

163

Another look at periodic wavelets Brody Dylan Johnson  

E-Print Network [OSTI]

Another look at periodic wavelets Brody Dylan Johnson St. Louis University 16 May 2009 Brody Dylan Johnson (St. Louis University) Another look at periodic wavelets 16 May 2009 1 / 31 #12;Overview Overview. (see, e.g., the texts of Meyer and Daubechies) Brody Dylan Johnson (St. Louis University) Another look

Johnson, Brody Dylan

164

Photonic bandgaps of periodic multilayers with diffuse interfaces  

E-Print Network [OSTI]

of the locations and widths of the forbidden bandgaps is standard [1­3]. However, generally the interfaces betweenPhotonic bandgaps of periodic multilayers with diffuse interfaces Jean-Michel André* , Philippe-michel.andre1@upmc.fr The photonic bandgap of periodic multilayers with diffuse interface is calculated

Boyer, Edmond

165

Observable coherence theory for statistically periodic fields Brynmor J. Davis*  

E-Print Network [OSTI]

Observable coherence theory for statistically periodic fields Brynmor J. Davis* The Beckman processes is used to develop classical coherence theory for the measurement of statistically periodicRevA.76.043843 PACS number s : 42.25.Kb, 42.60.Mi, 42.65.Re I. INTRODUCTION Coherence theory 1

Bhargava, Rohit

166

BOTT PERIODICITY AND THE INDEX OF ELLIPTIC OPERATORS  

Science Journals Connector (OSTI)

......Articles BOTT PERIODICITY AND THE INDEX OF ELLIPTIC OPERATORS M. F...University BOTT PERIODICITY AND THE INDEX OF ELLIPTIC OPERATORS By M...Equivariant JT-theory and completion' (to appear). 9. M. F...and I. M. Singer, 'The index of elliptio operators I......

M. F. ATIYAH

1968-01-01T23:59:59.000Z

167

Insecticides and my Osmia cornifrons Nesting Container Nesting Period  

E-Print Network [OSTI]

Insecticides and my Osmia cornifrons Nesting Container Nesting Period The Osmia cornifrons nesting male offspring. The end caps of nesting tubes made by older females are thin and weak, and they tend to break easily. In addition, near the end of the nesting period the numbers of parasites and predators

168

EIS-0431: Extension of Public Comment Period | Department of Energy  

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

31: Extension of Public Comment Period 31: Extension of Public Comment Period EIS-0431: Extension of Public Comment Period Hydrogen Energy California's Integrated Gasification Combined Cycle and Carbon Capture and Sequestration Project, CA The U.S. Department of Energy (DOE) published a notice of availability on July 22, 2013 (78 FR 43870) that provided for a comment period ending September 3, 2013. DOE is extending the public comment period to October 1, 2013, and announces public hearings for the Hydrogen Energy California's Integrated Gasification Combined Cycle Project Preliminary Staff Assessment/Draft Environmental Impact Statement (PSA/DEIS; DOE/EIS--0431D; 78 FR 52764). The PSA/DEIS is available on the internet at http://www.energy.gov/nepa/downloads/eis-0431-draft-environmental-impact-statement

169

EIS-0431: Extension of Public Comment Period | Department of Energy  

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

Public Comment Period Public Comment Period EIS-0431: Extension of Public Comment Period Hydrogen Energy California's Integrated Gasification Combined Cycle and Carbon Capture and Sequestration Project, CA The U.S. Department of Energy (DOE) published a notice of availability on July 22, 2013 (78 FR 43870) that provided for a comment period ending September 3, 2013. DOE is extending the public comment period to October 1, 2013, and announces public hearings for the Hydrogen Energy California's Integrated Gasification Combined Cycle Project Preliminary Staff Assessment/Draft Environmental Impact Statement (PSA/DEIS; DOE/EIS--0431D; 78 FR 52764). The PSA/DEIS is available on the internet at http://www.energy.gov/nepa/downloads/eis-0431-draft-environmental-impact-statement or on the CEC electronic docket site at

170

Department of Energy Extends Public Comment Period | Department of Energy  

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

Department of Energy Extends Public Comment Period Department of Energy Extends Public Comment Period Department of Energy Extends Public Comment Period September 29, 2011 - 12:00pm Addthis Media Contacts Darwin J. Morgan morgan@nv.doe.gov 702-295-3521 Kelly K. Snyder snyderk@nv.doe.gov 702-295-3521 In response to public comments and requests, the U.S. Department of Energy National Nuclear Security Administration Nevada Site Office is extending the public comment period for the Draft Site-Wide Environmental Impact Statement (SWEIS) for the Nevada National Security Site (NNSS) and Off-Site Locations in Nevada. The formal comment period will close on December 2, 2011, rather than October 27. Within the draft SWEIS, the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office presents a formal analysis of

171

Department of Energy Extends Public Comment Period | Department of Energy  

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

Department of Energy Extends Public Comment Period Department of Energy Extends Public Comment Period Department of Energy Extends Public Comment Period September 29, 2011 - 12:00pm Addthis Media Contacts Darwin J. Morgan morgan@nv.doe.gov 702-295-3521 Kelly K. Snyder snyderk@nv.doe.gov 702-295-3521 In response to public comments and requests, the U.S. Department of Energy National Nuclear Security Administration Nevada Site Office is extending the public comment period for the Draft Site-Wide Environmental Impact Statement (SWEIS) for the Nevada National Security Site (NNSS) and Off-Site Locations in Nevada. The formal comment period will close on December 2, 2011, rather than October 27. Within the draft SWEIS, the U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office presents a formal analysis of

172

Extension of Comment Period on Improving Performance of Federal Permitting  

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

Extension of Comment Period on Improving Performance of Federal Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 On August 29, 2013, the U.S. Department of Energy (DOE) published a Request for Information seeking information on a draft Integrated, Interagency Pre-Application (IIP) Process for significant onshore electric transmission projects requiring Federal authorizations. This notice announces an extension of the public comment period for submitting comments regarding the IIP Process to October 31, 2013. Extension of Comment Period on Improving Performance of Federal Permitting

173

Extension of Comment Period on Improving Performance of Federal Permitting  

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

Extension of Comment Period on Improving Performance of Federal Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 Extension of Comment Period on Improving Performance of Federal Permitting and Review of Infrastructure Projects: Federal Register Notice Volume 78, No. 186 - September 25, 2013 On August 29, 2013, the U.S. Department of Energy (DOE) published a Request for Information seeking information on a draft Integrated, Interagency Pre-Application (IIP) Process for significant onshore electric transmission projects requiring Federal authorizations. This notice announces an extension of the public comment period for submitting comments regarding the IIP Process to October 31, 2013. Extension of Comment Period on Improving Performance of Federal Permitting

174

The orbital period of the eclipsing dwarf nova CG Draconis  

E-Print Network [OSTI]

We have performed time resolved photometry on the dwarf nova CG Dra and have established for the first time that it is an eclipsing system. By measuring the times of the eclipses, we determined the orbital period as 0.18864(4) d, or 4h 31m 38 +/- 3s. This value is consistent with the shorter of two periods proposed from earlier spectroscopic studies. The orbital period places CG Dra above the period gap. The symmetrical eclipses are of short duration (FWHM 18+/-2 min, or 0.066(7) of the orbital period) and shallow (average 0.16+/-0.02 mag), suggesting a grazing eclipse which is consistent with an orbital inclination just above the critical value. Flickering persists through the eclipse which means that the flickering source is not occulted by the secondary star.

Jeremy Shears; David Boyd; Steve Brady; Roger Pickard

2008-02-04T23:59:59.000Z

175

Planar resonant periodic orbits in Kuiper belt dynamics  

E-Print Network [OSTI]

In the framework of the planar restricted three body problem we study a considerable number of resonances associated to the Kuiper Belt dynamics and located between 30 and 48 a.u. Our study is based on the computation of resonant periodic orbits and their stability. Stable periodic orbits are surrounded by regular librations in phase space and in such domains the capture of trans-Neptunian object is possible. All the periodic orbits found are symmetric and there is evidence for the existence of asymmetric ones only in few cases. In the present work first, second and third order resonances are under consideration. In the planar circular case we found that most of the periodic orbits are stable. The families of periodic orbits are temporarily interrupted by collisions but they continue up to relatively large values of the Jacobi constant and highly eccentric regular motion exists for all cases. In the elliptic problem and for a particular eccentricity value of the primary bodies the periodic orbits are isolated. The corresponding families, where they belong to, bifurcate from specific periodic orbits of the circular problem and seem to continue up to the rectilinear problem. Both stable and unstable orbits are obtained for each case. In the elliptic problem the unstable orbits found are associated with narrow chaotic domains in phase space. The evolution of the orbits, which are located in such chaotic domains, seems to be practically regular and bounded for long time intervals.

George Voyatzis; Thomas Kotoulas

2005-02-28T23:59:59.000Z

176

DOE Media Advisory - DOE extends public comment period on Draft  

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

Media Advisory - DOE extends public comment period on Draft Media Advisory - DOE extends public comment period on Draft Environmental Assessment for Replacement Capability for Disposal of Remote-Handled Low-Level Radioactive Waste Generated at the U.S. Department of Energy's Idaho Site DOE Media Advisory - DOE extends public comment period on Draft Environmental Assessment for Replacement Capability for Disposal of Remote-Handled Low-Level Radioactive Waste Generated at the U.S. Department of Energy's Idaho Site October 13, 2011 - 12:00pm Addthis Media Contact Tim Jackson 208-526-8484 In response to requests from people interested in National Environmental Policy Act activities occurring at the U.S. Department of Energy's Idaho Operations Office, the department has extended the public comment period that began September 1 on the Draft Environmental Assessment for

177

Property:Building/EndPeriod | Open Energy Information  

Open Energy Info (EERE)

EndPeriod EndPeriod Jump to: navigation, search This is a property of type Date. End of the period (last day of the month) Pages using the property "Building/EndPeriod" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 1 December 2004 + Sweden Building 05K0002 + 1 December 2004 + Sweden Building 05K0003 + 1 December 2004 + Sweden Building 05K0004 + 1 December 2004 + Sweden Building 05K0005 + 1 September 2005 + Sweden Building 05K0006 + 1 September 2005 + Sweden Building 05K0007 + 1 September 2005 + Sweden Building 05K0008 + 1 September 2005 + Sweden Building 05K0009 + 1 September 2005 + Sweden Building 05K0010 + 1 September 2005 + Sweden Building 05K0011 + 1 September 2005 + Sweden Building 05K0012 + 1 December 2004 +

178

Extension of Comment Period on the Draft Integrated, Interagency  

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

Extension of Comment Period on the Draft Integrated, Interagency Extension of Comment Period on the Draft Integrated, Interagency Pre-Application (IIP) Process for Electric Transmission Projects Requiring Federal Authorizations Extension of Comment Period on the Draft Integrated, Interagency Pre-Application (IIP) Process for Electric Transmission Projects Requiring Federal Authorizations September 25, 2013 - 4:24pm Addthis On August 29, 2013, the U.S. Department of Energy (DOE) published a Request for Information seeking information on a draft Integrated, Interagency Pre-Application (IIP) Process for significant onshore electric transmission projects requiring Federal authorizations. An announcement extending the public comment period for submitting comments regarding the IIP Process was published in the Federal Register on

179

Application Periods Open for 2014 National Clean Energy Business Plan  

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

Application Periods Open for 2014 National Clean Energy Business Application Periods Open for 2014 National Clean Energy Business Plan Competition's Regional Contests Application Periods Open for 2014 National Clean Energy Business Plan Competition's Regional Contests November 14, 2013 - 5:05pm Addthis The Energy Department today announced the opening of the application periods for six regional competitions that are part of the 2014 U.S. Department of Energy National Clean Energy Business Plan Competition. The competition aims to inspires university teams and promote entrepreneurship in clean energy technologies that will boost American competitiveness, bring cutting-edge clean energy solutions to the market, and strengthen our economic prosperity. The National Clean Energy Business Plan Competition challenges university

180

Property:Building/StartPeriod | Open Energy Information  

Open Energy Info (EERE)

StartPeriod StartPeriod Jump to: navigation, search This is a property of type Date. Start of the period (first day o the month) Pages using the property "Building/StartPeriod" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 1 January 2004 + Sweden Building 05K0002 + 1 January 2004 + Sweden Building 05K0003 + 1 January 2004 + Sweden Building 05K0004 + 1 January 2004 + Sweden Building 05K0005 + 1 October 2004 + Sweden Building 05K0006 + 1 October 2004 + Sweden Building 05K0007 + 1 October 2004 + Sweden Building 05K0008 + 1 October 2004 + Sweden Building 05K0009 + 1 October 2004 + Sweden Building 05K0010 + 1 October 2004 + Sweden Building 05K0011 + 1 October 2004 + Sweden Building 05K0012 + 1 January 2004 + Sweden Building 05K0013 + 1 October 2004 +

Note: This page contains sample records for the topic "5-cm period undulator" 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

Total Estimated Contract Cost: Performance Period Total Fee Paid  

Energy Savers [EERE]

Wastren-EnergX Mission Support LLC Contract Number: DE-CI0000004 Contract Type: Cost Plus Award Fee 128,879,762 Contract Period: December 2009 - July 2015 Fee Information...

182

Total Estimated Contract Cost: Performance Period Total Fee Paid  

Office of Environmental Management (EM)

Period: Fee Information Maximum Fee Contract Type: Minimum Fee 91,085,394 74,386,573 Target Fee September 2002 - March 2017 Cost Plus Fixed FeeIncentive Fee 1,192,114,896...

183

Total Estimated Contract Cost: Performance Period Total Fee Paid  

Energy Savers [EERE]

Cumulative Fee Paid 22,200,285 Wackenhut Services, Inc. DE-AC30-10CC60025 Contractor: Cost Plus Award Fee 989,000,000 Contract Period: Contract Type: January 2010 - December...

184

Total Estimated Contract Cost: Performance Period Total Fee Paid  

Office of Environmental Management (EM)

Number: Contract Type: Contract Period: 0 Minimum Fee Maximum Fee Washington River Protection Solutions LLC DE-AC27-08RV14800 Cost Plus Award Fee 5,553,789,617 Fee Information...

185

Total Estimated Contract Cost: Performance Period Total Fee Paid  

Office of Environmental Management (EM)

2011 - September 2015 June 2014 Contractor: Contract Number: Contract Type: Idaho Treatment Group LLC DE-EM0001467 Cost Plus Award Fee Fee Information 419,202,975 Contract Period:...

186

Total Estimated Contract Cost: Performance Period Total Fee Paid  

Office of Environmental Management (EM)

FY2010 FY2011 FY2012 Fee Information Minimum Fee Maximum Fee June 2014 Contract Number: Cost Plus Incentive Fee Contractor: 3,245,814,927 Contract Period: EM Contractor Fee Site:...

187

The orbital period distribution of subdwarf B binaries  

E-Print Network [OSTI]

We present the results of a 3.5 year long campaign to measure orbital periods of subdwarf B (sdB) star binaries. We directly compare our observed orbital period distribution with that predicted by using binary population synthesis. Up to now, most of our systems seem to have been formed through two of the formation channels discussed by Han et al.(2003), i.e. the first and the second common envelope ejection (CE) channels. At this point, thanks to the long baseline of our observations, we are starting to detect also very long orbital period systems. These have probably come from a complete different formation path, the first stable Roche Lobe overflow (RLOF) channel in which the first mass transfer phase is stable. This channel is expected to lead to the formation of very wide binaries with orbital periods ranging between 0.5 to 2000 days.

L. Morales-Rueda; P. F. L. Maxted; T. R. Marsh

2003-09-03T23:59:59.000Z

188

Short-period seismic rotations and translations recorded by Rotaphone  

E-Print Network [OSTI]

-period Rotaphone records of events induced by natural and/or anthropogenic sources 31 5.1 Records of quarry blasts Rotation to translation relations 39 7 The problem of seismic translational components being contaminated

Cerveny, Vlastislav

189

Accepted by ApJ. Periodicities in Solar Flare Occurrence  

E-Print Network [OSTI]

that the periodicity near 154 days operated during cycles 19­21 (Lean & Brueckner 1989; Lean 1990; Oliver et al. 1998 of sunspot numbers generally agree with the results of sunspot area analyses (Lean & Brueckner 1989; Krivova

Bai, Taeil

190

Dynamic Scheduling of Skippable Periodic Tasks: Issues and Proposals  

E-Print Network [OSTI]

-Chetto and Audrey Marchand IRCCyN, University of Nantes, Nantes, FRANCE Email: {maryline.chetto, audrey.marchand Scheduling of Skippable Periodic Tasks in Weakly-Hard Real-Time Systems," by M. Silly-Chetto, and A. Marchand

Paris-Sud XI, Université de

191

Periodic solutions of Schrodinger equation in Hilbert space  

E-Print Network [OSTI]

Necessary and sufficient conditions for existence of boundary value problem of Schrodinger equation are obtained in linear and nonlinear cases. Periodic analytical solutions are represented using generalized Green's operator

A. A. Boichuk; A. A. Pokutnyi

2012-09-03T23:59:59.000Z

192

Modeling Maritime Culture: Galveston, Texas, in the Historic Period  

Science Journals Connector (OSTI)

...“Maritime cultural landscape” (MCL) can be applied as both a research framework and a theoretical inquiry into cultural interactions with the sea. The utility of MCL approaches in historic period archaeologica...

Matthew E. Keith; Amanda M. Evans

2011-01-01T23:59:59.000Z

193

Thermal equilibrium theory of periodically focused charged-particle beams  

E-Print Network [OSTI]

A thermal equilibrium theory of periodically focused charged-particle beams is presented in the framework of both warm-fluid and kinetic descriptions. In particular, the thermal beam equilibria are discussed for paraxial ...

Samokhvalova, Ksenia R

2008-01-01T23:59:59.000Z

194

Real-time Multi-period truckload routing problems  

E-Print Network [OSTI]

In this thesis we consider a multi-period truckload pick-up and delivery problem dealing with real-time requests over a finite time horizon. We introduce the notion of postponement of requests, whereby the company can ...

Limpaitoon, Tanachai

2008-01-01T23:59:59.000Z

195

Microsoft Word - DOE News Release - Public Comment Period Extended...  

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

Period on Proposed Cleanup Plans Extended 60 Days On Oct. 31, 2014 the U.S. Department of Energy (DOE) released two formal Proposed Plans for the decontamination and...

196

Application Periods Open for 2014 National Clean Energy Business Plan  

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

Application Periods Open for 2014 National Clean Energy Business Application Periods Open for 2014 National Clean Energy Business Plan Competition's Regional Contests Application Periods Open for 2014 National Clean Energy Business Plan Competition's Regional Contests November 14, 2013 - 5:05pm Addthis The Energy Department today announced the opening of the application periods for six regional competitions that are part of the 2014 U.S. Department of Energy National Clean Energy Business Plan Competition. The competition aims to inspires university teams and promote entrepreneurship in clean energy technologies that will boost American competitiveness, bring cutting-edge clean energy solutions to the market, and strengthen our economic prosperity. The National Clean Energy Business Plan Competition challenges university

197

Realtime controller tuning for periodic disturbance rejection with application to active noise control  

E-Print Network [OSTI]

de Callafon. Scheduling control for periodic disturbance at-de Callafon, “Scheduling Control for Periodic DisturbanceR.A. de Callafon, “Scheduling Control for Periodic Distur-

Kinney, Charles E.

2009-01-01T23:59:59.000Z

198

An Autonomous Adaptive Scheduling Agent for Period Searching  

E-Print Network [OSTI]

We describe the design and implementation of an autonomous adaptive software agent that addresses the practical problem of observing undersampled, periodic, time-varying phenomena using a network of HTN-compliant robotic telescopes. The algorithm governing the behaviour of the agent uses an optimal geometric sampling technique to cover the period range of interest, but additionally implements proactive behaviour that maximises the optimality of the dataset in the face of an uncertain and changing operating environment.

Eric S. Saunders; Tim Naylor; Alasdair Allan

2008-01-24T23:59:59.000Z

199

Prominence seismology using the period ratio of transverse thread oscillations  

E-Print Network [OSTI]

The ratio of the period of the fundamental mode to that of the first overtone of kink oscillations, from here on the "period ratio", is a seismology tool that can be used to infer information about the spatial variation of density along solar magnetic flux tubes. The period ratio is 2 in longitudinally homogeneous thin tubes, but it differs from 2 due to longitudinal inhomogeneity. In this paper we investigate the period ratio in longitudinally inhomogeneous prominence threads and explore its implications for prominence seismology. We numerically solve the two-dimensional eigenvalue problem of kink oscillations in a model of a prominence thread. We take into account three nonuniform density profiles along the thread. In agreement with previous works that used simple piecewise constant density profiles, we find that the period ratio is larger than 2 in prominence threads. When the ratio of the central density to that at the footpoints is fixed, the period ratio depends strongly on the form of the density profi...

Soler, R; Ballester, J L

2015-01-01T23:59:59.000Z

200

Observations of long period earthquakes accompanying hydraulic fracturing  

SciTech Connect (OSTI)

Waveforms of most seismic events accompanying hydraulic fracturing have been reported to contain clear P and S waves and have fault plane solutions consistent with shear displacement across a fault. This observation is surprising since classical hydraulic fracturing theory predicts the creation of a tensile opening of a cavity in response to fluid pressure. Very small long period events, similar to long period earthquakes observed at volcanoes, were found to occur during four hydraulic fracturing experiments carried out at Fenton Hill, New Mexico. Since the long period earthquakes occur in the same region as the shear type events, it is concluded that the unusual character of the long period earthquake waveforms is due to a source effect and not a path effect. The occurrence of long period earthquakes during hydraulic fracturing could indicate tensile fracturing. Many waveforms of these events are identical, which implies that these events represent repeated activation of a given source. A proposed source for these long period events is the sudden opening of a channel that connects two cracks filled with fluid at different pressures. The sizes of the two cracks differ, which causes two or more peaks to appear in the spectra, each peak being associated with one physical dimension of each crack. From the frequencies at which spectral peaks occur, crack lengths are estimated to be between 3 and 20m.

Bame, D.; Fehler, M.

1986-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Ionized impurity scattering in periodically ?-doped InP  

Science Journals Connector (OSTI)

The quantum mobility in the individual minibands of InP with periodic Si ? doping was estimated from the Shubnikov–de Haas spectra of the samples, measured at 4.2 K in fields of 0–14 T. The set of samples studied had a sheet density of Si atoms of about 4.9×1012 cm-2 in each doped layer, and a doping period in the range 90–300 ?. A theoretical model for the quantum mobility in individual minibands was developed, and theoretical estimates of the quantum mobility are in reasonable agreement with the experimental values. It is observed that at a fixed doping period the quantum mobilities increase with the index of the miniband, and the quantum mobility in an individual miniband decreases when the doping period is made shorter. The dependence of the quantum mobility on the miniband index and doping periodicity correlates with the dependence of the mean distance between electrons and the doped layer on the same quantities. These results demonstrate that in ?-doped semiconductors the binding length of the quantum-confined electronic charge is a very important parameter, determining the carrier mobility which can be attained in these systems.

A. B. Henriques, L. C. D. Gon?calves, N. F. Oliveira Jr., P. L. Souza, and B. Yavich

1997-05-15T23:59:59.000Z

202

DOE Extends Comment Period on Certification and Enforcement Notice of  

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

Certification and Enforcement Notice Certification and Enforcement Notice of Proposed Rulemaking DOE Extends Comment Period on Certification and Enforcement Notice of Proposed Rulemaking October 15, 2010 - 10:22am Addthis In response to a formal request, the Department has extended to October 29, 2010, the deadline for submission of comments in response to the Notice or Proposed Rulemaking on the certification and enforcement of the Department's energy conservation standards. (75 FR 56796). The signed extension provided here will be published shortly in the Federal Register. Addthis Related Articles DOE Extends Comment Period on Notice of Inquiry Under the Energy Independence and Security Act DOE Extends Comment Period on Notice of Inquiry Under the Energy Independence and Security Act Department of Energy Issues Final Rule on Loan Guarantees

203

STAR Teaching Program Application Period | Department of Energy  

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

STAR Teaching Program Application Period STAR Teaching Program Application Period STAR Teaching Program Application Period December 28, 2012 2:30PM EST to January 31, 2013 5:30PM EST Cal Poly The Science Teacher and Researcher (STAR) Researcher program, a collaborative project of California State University, provides pre-service and early career science teachers with eight week long paid mentor and research opportunities at a national research center. Applicants must have the following: A demonstrated interest in becoming a science or mathematics teacher at the secondary level (grades 6-12) Either a California State University (CSU) student OR NSF Noyce Scholar in the United States OR a STAR Alum with two or fewer years of participation AND two or fewer years of teaching experience (first time participants must be pre-service teachers, i.e., not yet teaching full-time

204

Estimating the Payback Period of Additional Insulation | Department of  

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

the Payback Period of Additional Insulation the Payback Period of Additional Insulation Estimating the Payback Period of Additional Insulation June 24, 2012 - 1:17pm Addthis Adding insulation in the attic of an existing home often results in a favorable payback. | Photo courtesy of Lieko Earle, NREL PIX 19612. Adding insulation in the attic of an existing home often results in a favorable payback. | Photo courtesy of Lieko Earle, NREL PIX 19612. What does this mean for me? Even if you hire a contractor to do the work, adding insulation to your home will likely have an attractive payback. If you can gather the information and plug it into an equation, you can determine the payback of adding insulation to your home. Use the equation below to estimate the cost effectiveness of adding insulation in terms of the "years to payback" for savings in heating costs.

205

Notice of extension of public comment period for reply comments. |  

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

Notice of extension of public comment period for reply comments. Notice of extension of public comment period for reply comments. Notice of extension of public comment period for reply comments. On July 27, 2010, the Department of Energy (DOE) published in the Federal Register a notice of inquiry (NOI) and request for comment from the public in its development of regulations pertaining to section 934, of the Energy Independence and Security Act of 2007 (''Act''). Section 934 addresses how the United States will meet its obligations under the Convention for Supplementary Compensation for Nuclear Damage (''CSC'') including its obligation to contribute to an international supplementary fund in the event of certain nuclear incidents.The NOI provided a September 27, 2010, deadline for comments, which was subsequently extended to October 27, 2010 in response to a public

206

Department of Energy Announces Plans for Additional Comment Period on  

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

Announces Plans for Additional Comment Period Announces Plans for Additional Comment Period on National Interest Electric Transmission Corridors Department of Energy Announces Plans for Additional Comment Period on National Interest Electric Transmission Corridors November 9, 2006 - 9:38am Addthis Under Section 1221(a) of the Energy Policy Act of 2005, the Department of Energy must issue a report based on the Department's August 8 Congestion Study. In that report, the Secretary may designate as a "national interest electric transmission corridor" (National Corridor) any geographic area experiencing electric energy transmission capacity constraints or congestion that adversely affects consumers. After issuing the August 8 Congestion Study, the Department invited public comment and received comments on the study from a variety of entities

207

Notice of extension of public comment period for reply comments. |  

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

extension of public comment period for reply comments. extension of public comment period for reply comments. Notice of extension of public comment period for reply comments. On July 27, 2010, the Department of Energy (DOE) published in the Federal Register a notice of inquiry (NOI) and request for comment from the public in its development of regulations pertaining to section 934, of the Energy Independence and Security Act of 2007 (''Act''). Section 934 addresses how the United States will meet its obligations under the Convention for Supplementary Compensation for Nuclear Damage (''CSC'') including its obligation to contribute to an international supplementary fund in the event of certain nuclear incidents.The NOI provided a September 27, 2010, deadline for comments, which was subsequently extended to October 27, 2010 in response to a public

208

Clock-controlled generators with large period output sequences  

Science Journals Connector (OSTI)

Clock-controlled generators are a kind of pseudo-random number generators (PRNG). Recently, some clock-controlled generators based on jumping Linear Finite State Machines (LFSMs) have been proposed, such as Pomaranch and MICKEY. The period and the linear complexity of their output sequences need to be large enough to provide security against linear attacks. In this paper, a new condition for the period to reach its maximal value is presented. The condition is better than the previous one. Further, some clock-controlled generators are considered, including a new generator which uses a Feedback with Carry Shift Register (FCSR) as the control register. How to maximise the period of their output sequences is investigated.

Zhiqiang Lin

2014-01-01T23:59:59.000Z

209

Periodic Discrete Energy for Long-Range Potentials  

E-Print Network [OSTI]

We consider periodic energy problems in Euclidean space with a special emphasis on long-range potentials that cannot be defined through the usual infinite sum. One of our main results builds on more recent developments of Ewald summation to define the periodic energy corresponding to a large class of long-range potentials. Two particularly interesting examples are the logarithmic potential and the Riesz potential when the Riesz parameter is smaller than the dimension of the space. For these examples, we use analytic continuation methods to provide concise formulas for the periodic kernel in terms of the Epstein Hurwitz Zeta function. We apply our energy definition to deduce several properties of the minimal energy including the asymptotic order of growth and the distribution of points in energy minimizing configurations as the number of points becomes large. We conclude with some detailed calculations in the case of one dimension, which shows the utility of this approach.

D. P. Hardin; E. B. Saff; Brian Simanek

2014-12-11T23:59:59.000Z

210

Estimating the Payback Period of Additional Insulation | Department of  

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

Estimating the Payback Period of Additional Insulation Estimating the Payback Period of Additional Insulation Estimating the Payback Period of Additional Insulation June 24, 2012 - 1:17pm Addthis Adding insulation in the attic of an existing home often results in a favorable payback. | Photo courtesy of Lieko Earle, NREL PIX 19612. Adding insulation in the attic of an existing home often results in a favorable payback. | Photo courtesy of Lieko Earle, NREL PIX 19612. What does this mean for me? Even if you hire a contractor to do the work, adding insulation to your home will likely have an attractive payback. If you can gather the information and plug it into an equation, you can determine the payback of adding insulation to your home. Use the equation below to estimate the cost effectiveness of adding insulation in terms of the "years to payback" for savings in heating costs.

211

Gravitational Waves from Periodic Three-Body Systems  

E-Print Network [OSTI]

Three bodies moving in a periodic orbit under the influence of Newtonian gravity ought to emit gravitational waves. We have calculated the gravitational radiation quadrupolar waveforms and the corresponding luminosities for the 13+11 recently discovered three-body periodic orbits in Newtonian gravity. These waves clearly allow one to distinguish between their sources: all 13+11 orbits have different waveforms and their luminosities (evaluated at the same orbit energy and body mass) vary by up to 13 orders of magnitude in the mean, and up to 20 orders of magnitude for the peak values.

Dmitrašinovi?, V; Hudomal, Ana

2015-01-01T23:59:59.000Z

212

Truncation of Periodic Image Interactions for Confined Systems  

E-Print Network [OSTI]

First principles methods based on periodic boundary conditions are used extensively by materials theorists. However, applying these methods to systems with confined electronic states entails the use of large unit cells in order to avoid artificial image interactions. We present a general approach for truncating the Coulomb interaction that removes image effects directly and leads to well converged results for modest-sized periodic cells. As an illustration, we find the lowest-energy quasiparticle and exciton states in two-dimensional hexagonal GaN sheets. These sheets have been proposed as parent materials for single-walled GaN nanotubes which may be of interest for optoelectronics.

Sohrab Ismail-Beigi

2006-03-16T23:59:59.000Z

213

Property:Wave Period Range(s) | Open Energy Information  

Open Energy Info (EERE)

Wave Period Range(s) Wave Period Range(s) Jump to: navigation, search Property Name Wave Period Range(s) Property Type String Pages using the property "Wave Period Range(s)" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + 10.0 + 10-ft Wave Flume Facility + 0.0 + 11-ft Wave Flume Facility + 10.0 + 2 2-ft Flume Facility + 10.0 + 3 3-ft Wave Flume Facility + 10.0 + 5 5-ft Wave Flume Facility + 10.0 + 6 6-ft Wave Flume Facility + 10.0 + A Alden Large Flume + 2.1 + Alden Small Flume + 0.0 + Alden Wave Basin + 1.0 + B Breakwater Research Facility + 0.0 + C Carderock Maneuvering & Seakeeping Basin + 0.0 + Carderock Tow Tank 2 + 0.0 + Carderock Tow Tank 3 + 0.0 + Chase Tow Tank + 3.1 + Coastal Harbors Modeling Facility + 2.3 +

214

Spiking mode operation for a uniform-period wiggler  

SciTech Connect (OSTI)

The onset of saturation in a uniform-period wiggler has been examined experimentally and through numerical simulations. Models have been constructed that explain the observations in simple and consistent ways. The models are based upon the development of strong frequency and amplitude modulation of the optical wave as a way to increase extraction efficiency and optical power.

Warren, R.W.; Goldstein, J.C.; Newnam, B.E.

1985-01-01T23:59:59.000Z

215

Total Estimated Contract Cost: Performance Period Total Fee Paid  

Office of Environmental Management (EM)

Fee Paid 127,390,991 Contract Number: Fee Available Contract Period: Contract Type: Cost Plus Award Fee 4,104,318,749 28,500,000 31,597,837 0 39,171,018 32,871,600 EM...

216

Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling  

E-Print Network [OSTI]

Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling James Weimer, Jos´e Ara´ujo, Aitor Hernandez and Karl Henrik Johansson Abstract-- Constraint-based control over wireless sensor net- works (WSNs) require control strategies that achieve a desired closed-loop system performance while

Johansson, Karl Henrik

217

EFFECT OF REACTION RATE PERIODICITY ON DETONATION PROPAGATION  

E-Print Network [OSTI]

EFFECT OF REACTION RATE PERIODICITY ON DETONATION PROPAGATION Eric O. Morano and Joseph E. Shepherd through numerical simulations how the detonation propagation is affected by the heterogeneous rate but there is no accepted and accurate repre- sentation of all thermodynamic states significant to the detonation process

Barr, Al

218

Periodic orbit theory of chaotic tunneling Olivier Sigwarth  

E-Print Network [OSTI]

pre­ cisely in this organization into nearly cancelling combinations: cycle expansions are dominated Cvitanovi'c April 17, 1998 PACS: 03.20.+i, 03.65.Sq, 05.40.+j, 05.45.+b keywords: cycle expansions, periodic orbits, dynamical zeta functions, quantum tunneling. Abstract 1 cycle expansions. 1 Introduction

Cvitanovc', Predrag

219

Periodic orbit theory of linear response Niels Sndergaard  

E-Print Network [OSTI]

all distinct non- repeating combinations of prime cycles. For k > 1, tp1+p2+...+pk are weights pre- cisely in this organization into nearly cancelling combinations: cycle expansions are dominated: 03.20.+i, 03.65.Sq, 05.40.+j, 05.45.+b keywords: cycle expansions, periodic orbits, dynamical zeta

Cvitanovc', Predrag

220

Reduction of periodic one-dimensional hopping model  

E-Print Network [OSTI]

In this research, methods of reducing a general periodic one-dimensional hopping model to a one- or two-state model, which keeps the basic properties of the original process, are discussed. This reduction also implies that, to some extent, many processes can be well described by simple two-state or even one-state models.

Yunxin Zhang

2010-07-04T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Recognition of resonance type in periodically forced oscillators  

E-Print Network [OSTI]

. Vegtera a Johann Bernoulli Institute for Mathematics and Computer Science, University of Groningen, P.O. Box 407, 9700 AK Groningen, The Netherlands. Abstract This paper deals with families of periodically Institute of Mathematics and Computer Science, University of Groningen, P.O. Box 407, 9700 AK, Groningen

Vegter, Gert

222

lthough Earth has undergone many periods of significant environmen-  

E-Print Network [OSTI]

A lthough Earth has undergone many periods of significant environmen- tal change, the planet push the Earth system outside the stable environmental state of the Holocene, with consequences occurred naturally and Earth's regu- latory capacity maintained the conditions that enabled human

Horton, Tom

223

L-FUNCTIONS AND PERIODS OF ADJOINT MOTIVES Michael Harris  

E-Print Network [OSTI]

L-FUNCTIONS AND PERIODS OF ADJOINT MOTIVES Michael Harris UFR de Math´ematiques Universit´e Paris 7 for unitary groups, due to Neal Harris, with Deligne's conjecture on critical values of L-functions. When for inclusions of special orthogonal groups; the version for unitary groups, due to Neal Harris [NH], gives

Harris, Michael - Institut de Mathématiques de Jussieu, Université Paris 7

224

Contract Periods for 2012-2013 Residence Halls  

E-Print Network [OSTI]

Contract Periods for 2012-2013 Residence Halls All of the residence halls are on Fall/Spring Contracts. THERE IS NO FALL ONLY CONTRACT. · The residence halls open for the fall semester on September 1 rate for the number of days they stay. Apartments Your contract entitles you to an apartment space

Minnesota, University of

225

Time period Annual mean [DOC] 95% CI (mg l-1)  

E-Print Network [OSTI]

.3 Time period Annual mean [SRP] ± 95% CI (mg l-1) SEPA EQS category mean Oct 2006 - Sept 2007* 16.8 ± 4 of different development activities. Building up a time series of DOC and soluble reactive phosphorus (SRP, SRP, total oxidised nitrogen and alkalinity. In addition, streamwater sampling has continued at five

226

Particle energization through time-periodic helical magnetic fields  

E-Print Network [OSTI]

We solve for the motion of charged particles in a helical time-periodic ABC (Arnold-Beltrami-Childress) magnetic field. The magnetic field lines of a stationary ABC field with coefficients A=B=C=1 are chaotic, and we show ...

Mitra, Dhrubaditya

227

Symmetric Multistip Methods for Periodic Initial Value Problems  

Science Journals Connector (OSTI)

......inwards. In the terminology of Stiefel & Bettis (1969), the former method is orbitally...proposed by Gautschi (1961) and Stiefel & Bettis (1969), but these require a priori...periodic" problem studied by Stiefel & Bettis (1969): z'+z = 0001 e^, z(0......

J. D. LAMBERT; I. A. WATSON

1976-10-01T23:59:59.000Z

228

The Best Damn Firewall Book Period, 2 edition  

Science Journals Connector (OSTI)

The Second Edition of the Best Damn Firewall Book Period is completely revised and updated to include all of the most recent releases from Microsoft, Cisco, Juniper Network, SonicWALL, and Check Point.Compiled from the best of the Syngress firewall ... Keywords: Security

Cherie Amon; Thomas W. Shinder; Anne Carasik-Henmi

2007-12-01T23:59:59.000Z

229

Periodic NDE for Bridge Maintenance Ralf W. Arndt  

E-Print Network [OSTI]

Periodic NDE for Bridge Maintenance Ralf W. Arndt NRC Research Associate U.S. Federal Highway Administration NDE Center 6300 Georgetown Pike McLean, VA 22101, USA ralf.arndt@fhwa.dot.gov Frank Jalinoos Program Manager U.S. Federal Highway Administration NDE Center 6300 Georgetown Pike McLean, VA 22101, USA

Huston, Dryver R.

230

Some Thoughts on Stability in Nonlinear Periodic Focusing Systems  

DOE R&D Accomplishments [OSTI]

A brief discussion is given of the long-term stability of particle motions through periodic focusing structures containing lumped nonlinear elements. A method is presented whereby one can specify the nonlinear elements in such a way as to generate a variety of structures in which the motion has long-term stability.

McMillan, E. M.

1967-09-05T23:59:59.000Z

231

Multi-period design of heat exchanger networks  

Science Journals Connector (OSTI)

Heat exchanger networks are an integral part of chemical processes as they recover available heat and reduce utility consumption, thereby improving the overall economics of an industrial plant. This paper focuses on heat exchanger network design for multi-period operation wherein the operating conditions of a process may vary with time. A typical example is the hydrotreating process in petroleum refineries where the operators increase reactor temperature to compensate for catalyst deactivation. Superstructure based multi-period models for heat exchanger network design have been proposed previously employing deterministic optimisation algorithms, e.g. (Aaltola, 2002; Verheyen and Zhang, 2006). Stochastic optimisation algorithms have also been applied for the design of flexible heat exchanger networks recently (Ma et al., 2007, 2008). The present work develops an optimisation approach using simulated annealing for design of heat exchanger networks for multi-period operation. A comparison of the new optimisation approach with previous deterministic optimisation based design approaches is presented to illustrate the utilisation of simulated annealing in design of optimal heat exchanger network configurations for multi-period operation.

Muhammad Imran Ahmad; Nan Zhang; Megan Jobson; Lu Chen

2012-01-01T23:59:59.000Z

232

Devil's Staircase in Magnetoresistance of a Periodic Array of Scatterers  

E-Print Network [OSTI]

The nonlinear response to an external electric field is studied for classical non-interacting charged particles under the influence of a uniform magnetic field, a periodic potential, and an effective friction force. We find numerical and analytical evidence that the ratio of transversal to longitudinal resistance forms a Devil's staircase. The staircase is attributed to the dynamical phenomenon of mode-locking.

Jan Wiersig; Kang-Hun Ahn

2001-02-28T23:59:59.000Z

233

DOE Extends Public Comment Period for Uranium Program Environmental Impact  

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

Uranium Program Environmental Uranium Program Environmental Impact Statement DOE Extends Public Comment Period for Uranium Program Environmental Impact Statement April 18, 2013 - 1:08pm Addthis Contractor, Bob Darr, S.M. Stoller Corporation Public Affairs, (720) 377-9672, ULinfo@lm.doe.gov GRAND JUNCTION, Colo. - The U.S. Department of Energy (DOE) today announced that the public comment period for the Draft Uranium Leasing Program Programmatic Environmental Impact Statement (ULP PEIS) has been extended to May 31, 2013. Under the Uranium Leasing Program, DOE's Office of Legacy Management manages 31 tracts of land in Mesa, Montrose, and San Miguel counties in Colorado - approximately 25,000 acres - that are leased to private entities for uranium and vanadium mining. No mining operations are active

234

On quasi-periodic solutions for a generalized Boussinesq equation  

Science Journals Connector (OSTI)

Abstract In this paper a one-dimensional generalized Boussinesq equation u t t ? u x x + ( u 3 + u x x ) x x = 0 with hinged boundary conditions is considered. It is proved that the above equation admits small-amplitude quasi-periodic solutions corresponding to finite dimensional invariant tori of an associated infinite dimensional Hamiltonian system. The proof is based on an infinite dimensional KAM theorem and the Birkhoff normal form.

Yanling Shi; Junxiang Xu; Xindong Xu

2014-01-01T23:59:59.000Z

235

Ultrasonic wave propagation in random and periodic particulate composites  

E-Print Network [OSTI]

Specimens Periodic specimens were manufactured containing multiple layers of spherical inclusions. Early attempts to make a multiple layer specimen using only polyester proved difficult and layer alignment was poor. Because of this, a PMMA matrix...), and then allowed to cool to 310 K (100' F). The finished layer consisted of a 2. 63 inrn thick circular disk of clear PMMA with an embedded layer of spheres and alignment holes near the rim. After all the layers were manufactured, they were stacked and aligned...

Henderson, Benjamin Kyle

1996-01-01T23:59:59.000Z

236

Sorting by Periodic Potential Energy Landscapes: Optical Fractionation  

E-Print Network [OSTI]

Viscously damped objects driven through a periodically modulated potential energy landscape can become kinetically locked in to commensurate directions through the landscape, and thus can be deflected away from the driving direction. We demonstrate that the threshold for an object to become kinetically locked in to an array can depend exponentially on its size. When implemented with an array of holographic optical tweezers, this provides the basis for a continuous and continuously optimized sorting technique for mesoscopic objects called ``optical fractionation''.

Kosta Ladavac; Karen Kasza; David G. Grier

2003-10-16T23:59:59.000Z

237

Some Thoughts on Stability in Nonlinear Periodic Focusing Systems [Addendum  

DOE R&D Accomplishments [OSTI]

Addendum to September 5, 1967 report with the same title and with the abstract: A brief discussion is given of the long-term stability of particle motions through periodic focusing structures containing lumped nonlinear elements. A method is presented whereby one can specify the nonlinear elements in such a way as to generate a variety of structures in which the motion has long-term stability.

McMillan, Edwin M.

1968-03-29T23:59:59.000Z

238

Unidirectional Invisibility Induced by PT-Symmetric Periodic Structures  

SciTech Connect (OSTI)

Parity-time (PT) symmetric periodic structures, near the spontaneous PT-symmetry breaking point, can act as unidirectional invisible media. In this regime, the reflection from one end is diminished while it is enhanced from the other. Furthermore, the transmission coefficient and phase are indistinguishable from those expected in the absence of a grating. The phenomenon is robust even in the presence of Kerr nonlinearities, and it can also effectively suppress optical bistabilities.

Lin Zin; Ramezani, Hamidreza; Kottos, Tsampikos [Department of Physics, Wesleyan University, Middletown, Connecticut 06459 (United States); Eichelkraut, Toni; Christodoulides, Demetrios N. [College of Optics and Photonics-CREOL, University of Central Florida, Orlando, Florida 32816 (United States); Cao Hui [Department of Applied Physics, Yale University, New Haven, Connecticut 06520 (United States)

2011-05-27T23:59:59.000Z

239

Orbital periods of twenty two subdwarf B stars  

E-Print Network [OSTI]

Subdwarf B (sdB) stars are thought to be core helium burning stars with low mass hydrogen envelopes. In recent years it has become clear that many sdB stars lose their hydrogen through interaction with a binary companion and continue to reside in binary systems today. In this paper we present the results of a programme to measure orbital parameters of binary sdB stars. We determine the orbits of 22 binary sdB stars from 424 radial velocity measurements, raising the sample of sdBs with known orbital parameters to 38. We calculate lower limits for the masses of the companions of the sdB stars which, when combined with the orbital periods of the systems, allow us to discuss approximate evolutionary constraints. We find that a formation path for sdB stars consisting of mass transfer at the tip of the red giant branch followed by a common envelope phase explains most, but not all of the observed systems. It is particularly difficult to explain both long period systems and short period, massive systems. We present new measurements of the effective temperature, surface density and surface helium abundance for some of the sdB stars by fitting their blue spectra. We find that two of them (PG0839+399 and KPD1946+4340) do not lie in the Extreme Horizontal Branch (EHB) band indicating that they are post-EHB stars.

L. Morales-Rueda; P. F. L. Maxted; T. R. Marsh; R. C. North; U. Heber

2002-09-23T23:59:59.000Z

240

The shortest modulation period Blazhko RR Lyrae star: SS Cnc  

E-Print Network [OSTI]

Extended BV(RI)c CCD observations of SS Cnc, a short period RRab star are presented. Nearly 1400 data points in each band have been obtained spanning over 79 days during the spring of 2005. The star exhibits light curve modulation, the so called Blazhko effect with small amplitude (B maximum brightness varies 0.1 mag) and with the shortest modulation period (5.309 d) ever observed. In the Fourier spectrum of the V light curve the pulsation frequency components are detected up to the 24th harmonic order, and modulation side lobe frequencies with significantly asymmetric amplitudes are seen up to the 15th and 9th orders for the lower and higher frequency components, respectively. Detailed comparison of the modulation behavior of SS Cnc and RR Gem, the two recently discovered small amplitude, short modulation period Blazhko stars is presented. The modulation frequency (f_m) appears in the Fourier spectrum of both stars with similar amplitude. We also demonstrate that the modulation frequencies have basically different properties as the pulsation and modulation side lobe frequencies have, indicating that the physics behind these frequency components are not the same. The discovery of small amplitude modulations of RRab stars cautions that the large photometric surveys (MACHO, OGLE) may seriously underestimate the number of modulated RR Lyrae stars.

J. Jurcsik; B. Szeidl; Á. Sódor; I. Dékány; Zs. Hurta; K. Posztobányi; K. Vida; M. Váradi; A. Szing

2006-03-20T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Many-body energy localization transition in periodically driven systems  

SciTech Connect (OSTI)

According to the second law of thermodynamics the total entropy of a system is increased during almost any dynamical process. The positivity of the specific heat implies that the entropy increase is associated with heating. This is generally true both at the single particle level, like in the Fermi acceleration mechanism of charged particles reflected by magnetic mirrors, and for complex systems in everyday devices. Notable exceptions are known in noninteracting systems of particles moving in periodic potentials. Here the phenomenon of dynamical localization can prevent heating beyond certain threshold. The dynamical localization is known to occur both at classical (Fermi–Ulam model) and at quantum levels (kicked rotor). However, it was believed that driven ergodic systems will always heat without bound. Here, on the contrary, we report strong evidence of dynamical localization transition in both classical and quantum periodically driven ergodic systems in the thermodynamic limit. This phenomenon is reminiscent of many-body localization in energy space. -- Highlights: •A dynamical localization transition in periodically driven ergodic systems is found. •This phenomenon is reminiscent of many-body localization in energy space. •Our results are valid for classical and quantum systems in the thermodynamic limit. •At critical frequency, the short time expansion for the evolution operator breaks down. •The transition is associated to a divergent time scale.

D’Alessio, Luca, E-mail: dalessio@buphy.bu.edu [Physics Department, Boston University, Boston, MA 02215 (United States) [Physics Department, Boston University, Boston, MA 02215 (United States); Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106 (United States); Polkovnikov, Anatoli, E-mail: asp@bu.edu [Physics Department, Boston University, Boston, MA 02215 (United States)] [Physics Department, Boston University, Boston, MA 02215 (United States)

2013-06-15T23:59:59.000Z

242

Complexity of hierarchically and 1-dimensional periodically specified problems  

SciTech Connect (OSTI)

We study the complexity of various combinatorial and satisfiability problems when instances are specified using one of the following specifications: (1) the 1-dimensional finite periodic narrow specifications of Wanke and Ford et al. (2) the 1-dimensional finite periodic narrow specifications with explicit boundary conditions of Gale (3) the 2-way infinite1-dimensional narrow periodic specifications of Orlin et al. and (4) the hierarchical specifications of Lengauer et al. we obtain three general types of results. First, we prove that there is a polynomial time algorithm that given a 1-FPN- or 1-FPN(BC)specification of a graph (or a C N F formula) constructs a level-restricted L-specification of an isomorphic graph (or formula). This theorem along with the hardness results proved here provides alternative and unified proofs of many hardness results proved in the past either by Lengauer and Wagner or by Orlin. Second, we study the complexity of generalized CNF satisfiability problems of Schaefer. Assuming P {ne} PSPACE, we characterize completely the polynomial time solvability of these problems, when instances are specified as in (1), (2),(3) or (4). As applications of our first two types of results, we obtain a number of new PSPACE-hardness and polynomial time algorithms for problems specified as in (1), (2), (3) or(4). Many of our results also hold for O(log N) bandwidth bounded planar instances.

Marathe, M.V.; Hunt, H.B. III; Stearns, R.E.; Radhakrishnan, V.

1995-08-23T23:59:59.000Z

243

Influence of surface traction on soft robot undulation  

E-Print Network [OSTI]

principles of elasticity and friction, we introduce a theoretical model that identifies the tribological their shape and functionality. This unique combination of mobil- ity, elastic compliance, and multi physical factors and classical theories that could eventually be used to find locomotion strategies

Liu, David R.

244

Lateral undulation of a snake-like robot  

E-Print Network [OSTI]

Snake robots have been studied by many researchers but historically more on a theoretical basis. Recently, more and more robotic snakes have been realized in hardware. This thesis presents a design process for the electrical, ...

Gupta, Amit

2007-01-01T23:59:59.000Z

245

Exploring the undulating plateau: the future of global oil supply  

Science Journals Connector (OSTI)

...4% quoted by the UK Energy Research Centre in 2008...North Sea and the Gulf of Mexico. Better subsurface seismic...slowly out of the global energy equation. In a short...alternative sources of energy, for example solar power. Over the past...

2014-01-01T23:59:59.000Z

246

Exploring the undulating plateau: the future of global oil supply  

Science Journals Connector (OSTI)

...past 10 years (IHS CERA Upstream Capital Costs Index and Upstream Operating Costs Index), and we expect capital and operating costs...to resources that require special drilling, completion and/or treatment techniques in order to be...

2014-01-01T23:59:59.000Z

247

The Joint Owners' Group Program on MOV Periodic Verification  

SciTech Connect (OSTI)

To address long-term motor operated valve (MOV) performance, the Babcock and Wilcox, Boiling Water Reactor, Combustion Engineering and Westinghouse Groups (B and WOG, BWROG, CEOG and WOG) teamed in 1997 to form the Joint Group (JOG) MOV Periodic Verification (PV) Program. This program is nearing completion, with 98 of the 103 operating U.S. reactor units participating. The goal of the program is to provide a justified approach for periodically testing MOVs, that addresses potential degradation. The program defines an interim approach that specifies periodic tests without flow and differential pressure (DP), at a frequency determined by the s risk significance and margin. To justify this approach, each participating plant is also DP testing 2 valves per unit. Each valve is tested three times over five years, with at least one year between tests. The data are evaluated jointly to confirm or adjust the initial guidance. The majority of the tests are complete and conclusions are coming into focus. For gate valves, when the valve factor is initially low, increases can occur between one test and a later test. One common way that the valve factor becomes low is disassembling and reassembling the valve. The data show that, following valve disassembly and re-assembly, the valve factor tends to be reduced, and it tends to increase in subsequent service. Outside of the valves disassembled and reassembled, some gate valves have low valve factors apparently because the valves are not stroked under DP conditions in service. For butterfly valves, there have been no observations of degradation in bearing friction coefficient. A few valves with bronze bearings in raw (untreated) water service have shown significant variations in friction, but they tend to be a mixture of increases and decreases with no pattern of degradation. Globe valves, both unbalanced and balanced, tend to show a constant valve factor with no indication of degradation. (authors)

Damerell, Paul S.; Spears, Todd A. [MPR Associates Inc., 140 Mustang Circle, Simpsonville, SC 29681 (United States)

2002-07-01T23:59:59.000Z

248

Log-periodic oscillations of transverse momentum distributions  

E-Print Network [OSTI]

Large p_T transverse momentum distributions exhibit apparently a power-like behavior. We argue that, under closer inspection, this behavior is in fact decorated with some log-periodic oscillations. Assuming that this is genuine effect and not experimental artefact, it suggests that either the exponent of the power-like behavior is in reality complex number or that there is a scale parameter which exhibits specific log-eriodic oscillations. This problem is discussed using Tsallis distributions with scale parameter being a temperature T. At this stage we consider both possibilities on equal footing.

Grzegorz Wilk; Zbigniew Wlodarczyk

2014-03-14T23:59:59.000Z

249

Controlled Self-Assembly of Periodic and Aperiodic Cluster Crystals  

Science Journals Connector (OSTI)

Soft particles are known to overlap and form stable clusters that self-assemble into periodic crystalline phases with density-independent lattice constants. We use molecular dynamics simulations in two dimensions to demonstrate that, through a judicious design of an isotropic pair potential, one can control the ordering of the clusters and generate a variety of phases, including decagonal and dodecagonal quasicrystals. Our results confirm analytical predictions based on a mean-field approximation, providing insight into the stabilization of quasicrystals in soft macromolecular systems, and suggesting a practical approach for their controlled self-assembly in laboratory realizations using synthesized soft-matter particles.

Kobi Barkan; Michael Engel; Ron Lifshitz

2014-08-28T23:59:59.000Z

250

Spectrum of Light in a Quantum Fluctuating Periodic Structure  

Science Journals Connector (OSTI)

We address the general problem of the excitation spectrum for light coupled to scatterers having quantum fluctuating positions around the sites of a periodic lattice. In addition to providing an imaginary part to the spectrum, we show that these quantum fluctuations affect the real part of the spectrum, in a way that we determine analytically. Our predictions may be observed with ultracold atoms in an optical lattice, on a J=0?J?=1 narrow atomic transition. As a side result, we resolve a controversy for the occurrence of a spectral gap in a fcc lattice.

Mauro Antezza and Yvan Castin

2009-09-18T23:59:59.000Z

251

Quantum Revivals in Periodically Driven Systems close to nonlinear resonance  

E-Print Network [OSTI]

We calculate the quantum revival time for a wave-packet initially well localized in a one-dimensional potential in the presence of an external periodic modulating field. The dependence of the revival time on various parameters of the driven system is shown analytically. As an example of application of our approach, we compare the analytically obtained values of the revival time for various modulation strengths with the numerically computed ones in the case of a driven gravitational cavity. We show that they are in very good agreement.

Farhan Saif; Mauro Fortunato

2006-02-28T23:59:59.000Z

252

Advanced Jones calculus for the classification of periodic metamaterials  

Science Journals Connector (OSTI)

By relying on an advanced Jones calculus, we analyze the polarization properties of light upon propagation through metamaterial slabs in a comprehensive manner. Based on symmetry considerations, we show that all periodic metamaterials may be divided into five different classes only. It is shown that each class differently affects the polarization of the transmitted light and sustains different eigenmodes. We show how to deduce these five classes from symmetry considerations and provide a simple algorithm that can be applied to decide to which class a given metamaterial belongs by measuring only the transmitted intensities.

Christoph Menzel; Carsten Rockstuhl; Falk Lederer

2010-11-15T23:59:59.000Z

253

Tsallis Distribution Decorated With Log-Periodic Oscillation  

E-Print Network [OSTI]

In many situations, in all branches of physics, one encounters power-like behavior of some variables which are best described by a Tsallis distribution characterized by a nonextensivity parameter $q$ and scale parameter $T$. However, there exist experimental results which can be described only by a Tsallis distributions which are additionally decorated by some log-periodic oscillating factor. We argue that such a factor can originate from allowing for a complex nonextensivity parameter $q$. The possible information conveyed by such an approach (like the occurrence of complex heat capacity, the notion of complex probability or complex multiplicative noise) will also be discussed.

Wilk, Grzegorz

2015-01-01T23:59:59.000Z

254

Tsallis Distribution Decorated With Log-Periodic Oscillation  

E-Print Network [OSTI]

In many situations, in all branches of physics, one encounters power-like behavior of some variables which are best described by a Tsallis distribution characterized by a nonextensivity parameter $q$ and scale parameter $T$. However, there exist experimental results which can be described only by a Tsallis distributions which are additionally decorated by some log-periodic oscillating factor. We argue that such a factor can originate from allowing for a complex nonextensivity parameter $q$. The possible information conveyed by such an approach (like the occurrence of complex heat capacity, the notion of complex probability or complex multiplicative noise) will also be discussed.

Grzegorz Wilk; Zbigniew Wlodarczyk

2015-01-12T23:59:59.000Z

255

Level dynamics for a periodically driven quantum system  

Science Journals Connector (OSTI)

We map the eigenvalue problem of a periodically driven quantum system with N-dimensional Hilbert space to a Hamiltonian N-particle system connected with an infinite-dimensional Lie algebra. This N-particle system is integrable and its equations of motion can be written in Lax form. It is a natural generalization of the so-called generalized Calogero-Moser and Sutherland models, which can be derived from eigenvalue problems of autonomous and kicked quantum systems, respectively. We show that, contrary to common opinion, the generalization of the Weierstrass potential dynamics no longer fulfills all Lax equations and is therefore not expected to be integrable.

R. Scharf and M. Ku?

1989-10-15T23:59:59.000Z

256

Sound propagation in urban areas: A periodic disposition of buildings  

Science Journals Connector (OSTI)

A numerical simulation of background noise propagation is performed for a network of hexagonal buildings. The obtained results suggest that the prediction of background noise in urban spaces is possible by means of a modified diffusion equation using two parameters: the diffusion coefficient that expresses the spreading out of noise resulting from diffuse scattering and multiple reflections by buildings, and an attenuation term accounting for the wall absorption, atmospheric attenuation, and absorption by the open top. The dependence of the diffusion coefficient with geometrical shapes and the diffusive nature of the buildings are investigated in the case of a periodic disposition of hexagonal buildings.

J. Picaut; J. Hardy; L. Simon

1999-10-01T23:59:59.000Z

257

Period Changes in Ultra-compact Double White Dwarfs  

E-Print Network [OSTI]

In recent years there has been much interest in the nature of two stars, V407 Vul and RXJ0806+1527, which are widely thought to be binary white dwarfs of very short orbital period, 570 and 321 seconds respectively. As such they should be strong sources of gravitational waves and possible ancestors of the accreting AM CVn stars. Monitoring at X-ray and optical wavelengths has established that the period of each star is decreasing, at rates compatible with that expected from gravitational radiation. This has been taken to support the ``unipolar inductor'' model in which the white dwarfs are detached and the X-rays produced by the dissipation of magnetically-induced electric currents. In this paper we show that this interpretation is incorrect because it ignores associated torques which transfer angular momentum between the spin of the magnetic white dwarf and the orbit. We show that this torque is 10^5 times larger than the GR term in the case of V407 Vul, and 10 times larger for RXJ0806+1527. For V407 Vul, the unipolar inductor model can only survive if the white dwarf spins 100 times faster than the orbit. Since this could only come about through accretion, the validity of the unipolar inductor appears questionable for this star. We also consider whether accretion models can fit the observed spin-up, concluding that they can, provided that a mechanism exists for driving the mass transfer rate away from its equilibrium value.

T. R. Marsh; G. Nelemans

2005-08-10T23:59:59.000Z

258

Periodic forcing of graphene as geometric ripples on its surface  

E-Print Network [OSTI]

We explore the possibility of using modulated high frequency periodic driving of mono-layer graphene to create effects of curved geometry. The low energy continuum limit of graphene is modeled using Dirac equation in (2+1) dimensions. We suggest that the modifications to the Dirac equation when written in a curved background space can also be induced by a suitable driving scheme. The time dependent system yields, in the approximate limit of high frequency pulsing, an effective time independent Hamiltonian that governs the time evolution, except for an initial and a final kick. We use a specific form of 4-phase pulsed forcing with suitably tuned choice of modulating operators to mimic the effects of weak metric perturbations and thereby effectively induce mild wrinkles on the surface. The strength of the perturbation is found to be directly related to omega^{-1} the time period of the driving field at the leading order. We apply the method to engineer some specific `nearly flat' metrics and we find that the imprint of curvilinear geometry modifies the band structure significantly. The emergence of band gap at the Dirac point is crucial in this regard. We suggest that this method shall be useful in studying the response of various properties of such materials to non-trivial geometry without requiring any actual physical deformations.

Tridev Mishra; Tapomoy Guha Sarkar; Jayendra N. Bandyopadhyay

2014-10-27T23:59:59.000Z

259

Notice of Public Scoping Meetings and Extention of Scoping Period  

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

678 Federal Register 678 Federal Register / Vol. 76, No. 140 / Thursday, July 21, 2011 / Notices you must have Adobe Acrobat Reader, which is available free at this site. You may also access documents of the Department published in the Federal Register by using the article search feature at http:// www.federalregister.gov. Specifically, through the advanced search feature at this site, you can limit your search to documents published by the Department. Dated: July 18, 2011. Eduardo M. Ochoa, Assistant Secretary for Postsecondary Education. [FR Doc. 2011-18454 Filed 7-20-11; 8:45 am] BILLING CODE 4000-01-P DEPARTMENT OF ENERGY Notice of Public Scoping Meetings and Extension of Scoping Period for the U.S. Department of Energy Uranium Leasing Program Programmatic Environmental Impact Statement

260

Total Estimated Contract Cost: Performance Period Total Fee Paid  

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

$ 3,422,994.00 $ 3,422,994.00 FY2011 4,445,142.00 $ FY2012 $ 5,021,951.68 FY2013 $ 3,501,670.00 FY2014 $0 FY2015 $0 FY2016 $0 FY2017 $0 FY2018 $0 FY2019 $0 Cumulative Fee Paid $16,391,758 Wackenhut Services, Inc. DE-AC30-10CC60025 Contractor: Cost Plus Award Fee $989,000,000 Contract Period: Contract Type: January 2010 - December 2019 Contract Number: EM Contractor Fee Site: Savannah River Site Office - Aiken, SC Contract Name: Comprehensive Security Services September 2013 Fee Information Maximum Fee $55,541,496 $5,204,095 $3,667,493 $5,041,415 Minimum Fee 0 Fee Available $5,428,947 $6,326,114

Note: This page contains sample records for the topic "5-cm period undulator" 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

Slow-light transmission in one-dimensional periodic structures  

SciTech Connect (OSTI)

We have analyzed the transmission properties of pulses through one-dimensional periodic structures in order to systematically explore the best conditions to achieve the maximum delay with the minimum possible distortion. In the absence of absorption and no layer variation, the transmission coefficient t{sub N} can be well approximated by a sum of Lorentzian resonances. The ratio between their width {Gamma}{sub r} and their separation {Delta}{omega}{sub r} is a crucial parameter to characterize the distortion of the transmitted pulse. For typical values of the parameters used in telecommunications and high index of refraction contrasts n{sub 2}/n{sub 1}, the distortion of the transmitted pulse is unacceptably large for frequencies near the edge of the transmission window. We estimate fractional delays achievables in terms of the central frequency used and the pulse bandwidth.

Barco, O. del; Ortuno, M. [Departamento de Fisica-CIOyN, Universidad de Murcia (Spain)

2010-02-15T23:59:59.000Z

262

Temperature-enhanced persistent currents and ?0/2 periodicity  

Science Journals Connector (OSTI)

We predict a nonmonotonous temperature dependence of the persistent currents in a ballistic ring coupled strongly to a stub in the grand-canonical as well as in the canonical case. We also show that such a nonmonotonous temperature dependence can naturally lead to a ?0/2 periodicity of the persistent currents, where ?0=h/e. There is a crossover temperature T*, below which persistent currents increase in amplitude with temperature while they decrease above this temperature. This is in contrast to persistent currents in rings being monotonously affected by temperature. T* is parameter-dependent but of the order of ?u/?2kB, where ?u is the level spacing of the isolated ring. For the grand-canonical case, T* is half of that for the canonical case.

M. V. Moskalets and P. Singha Deo

2000-09-15T23:59:59.000Z

263

Dynamically tunable Fano resonance in periodically asymmetric graphene nanodisk pair  

E-Print Network [OSTI]

We present a dynamically frequency tunable Fano resonance planar device composed of periodically asymmetric graphene nanodisk pair for the mid-infrared region. There are two kinds of modes in this structure, that is, the symmetric mode and the antisymmetric mode. The resonance coupling between the symmetric and antisymmetric modes creates a classical Fano resonance. Both of the Fano resonance amplitude and frequency of the structure can be dynamically controlled by varying the Fermi energy of graphene. Resonance transition in the structure is studied to reveal the physical mechanism behind the dynamically tunable Fano resonance. The features of the Fano resonant graphene nanostructures should have promising applications in tunable THz filters, switches, and modulators.

Zhang, Zhengren; Fan, Yuancheng; Yin, Pengfei; Zhang, Liwei; Shi, Xi

2015-01-01T23:59:59.000Z

264

Periodic relativity: deflection of light, acceleration, rotation curves  

E-Print Network [OSTI]

Vectorial analysis relating to derivation of deflection of light is presented. Curvilinear acceleration is distinguished from the Newtonian polar conic acceleration. The difference between the two is due to the curvature term. Lorentz invariant expression for acceleration is derived. A physical theory of rotation curves of galaxies based on second solution to Einstein's field equation is presented. Theory is applied to Milky Way, M31, NGC3198 and Solar system. Modified Kepler's third law yields correct orbital periods of stars in a galaxy. Deviation factor in the line element of the theory happens to be the ratio of the Newtonian gravitational acceleration to the measured acceleration of the star in the galaxy. Therefore this deviation factor can replace the MOND function.

Vikram H. Zaveri

2014-12-08T23:59:59.000Z

265

The moments of Minkowski ?(x) function: dyadic period functions  

E-Print Network [OSTI]

We examine the generating function of moments of the Minkowski question mark function ?(x), which describes the distribution or rationals according to their continued fraction expansion. It appears that the generating function possesses certain modular properties and is defined in the cut plane. The exponential generating function satisfies the integral equation, with kernel being the Bessel function of the first kind. Finally, the solution of this integral equation leads to the definition of dyadic period functions of weight 2 and index lambda. Such a form is defined and is holomorphic in the cut plane, it satisfies the semi-modular functional equation, and it exists for every lambda which is the eigen-value of the properly defined Hilbert-Schmidt integral operator.

Alkauskas, Giedrius

2008-01-01T23:59:59.000Z

266

Physics Division progress report for period ending September 30, 1984  

SciTech Connect (OSTI)

The research activities of the Division are centered primarily in three areas: experimental nuclear physics, experimental atomic physics, and theoretical nuclear and atomic physics. The largest of these efforts, experimental nuclear physics, is dominated by the heavy ion research program. A major responsibility under this program is the operation of the Holifield Heavy Ion Research Facility as a national user facility. During the period of this report, the facility has begun routine operation for the experimental program. The experimental atomic physics program has two components: the accelerator-based studies of basic collisional phenomena and the studies in support of the controlled fusion program. Also associated with the fusion-related studies are a plasma diagnostics program and the operation of an atomic physics data center. The theoretical physics program, both nuclear and atomic, is covered. This program has benefited this year from the success of the VAX-AP computer system and from the increase in manpower provided by the ORNL/University of Tennessee Distinguished Scientist Program. Smaller programs in applications and high-energy physics are summarized. During the period of this report, we continued to explore possible future extensions of the Holifield Facility. We retain a strong interest in a relativistic heavy-ion collider in the 10 x 10 GeV/nuclear energy range. The ideas for such a facility, described in last year's report, have been modified to utilize the HHIRF 25 MV tandem accelerator as the first stage. Finally, the report concludes with some general information on publications, Division activities, and personnel changes.

Livingston, A.B. (ed.)

1985-01-01T23:59:59.000Z

267

IUPAC Periodic Table of Isotopes for the Educational Community  

SciTech Connect (OSTI)

John Dalton first proposed the concept of atomic weights of the elements in the first decade of the nineteenth century. These atomic weights of the chemical elements were thought of as constants of nature, similar to the speed of light. Dmitri Mendeleev arranged the atomic weights of the elements in ascending order of value and used the systematic variation of their chemical properties to produce his Periodic Table of the Elements in 1869. Measurement of atomic weight values became an important chemical activity for a century and a half. Theodore Richards received a Noble Prize for his work in this area. In 1913, Fredrick Soddy found a species of radium, which had an atomic weight value of 228, compared to the familiar radium gas value of 226. Soddy coined the term 'isotope' (Greek for 'in the same place') to account for this second atomic weight value in the radium position of the Periodic Table. Both of these isotopes of radium are radioactive. Radioactive isotopes are energetically unstable and will decay (disintegrate) over time. The time it takes for one half of a sample of a given radioactive isotope to decay is the half-life of that isotope. In addition to having different atomic weight values, radium-226 and radium-228 also have different half-life values. Around the same time as Soddy's work, J.J. Thomson (discoverer of the electron) identified two stable (non-radioactive) isotopes of the same element, neon. Over the next 40 years, the majority of the known chemical elements were found to have two or more stable (or long-lived radioactive isotopes that contribute significantly to the determination of the atomic weights of the elements).

Holden N. E.; Holden,N.E.; Coplen,T.B.

2012-07-15T23:59:59.000Z

268

Periodic gravitational waves from small cosmic string loops  

Science Journals Connector (OSTI)

We consider a population of small, high-velocity cosmic string loops. We assume the typical length of these loops is determined by the gravitational radiation scale and use the results of Polchinski and Rocha which pointed out their highly relativistic nature. A study of the gravitational wave emission from such a population is carried out. The large Lorentz boost involved causes the lowest harmonics of the loops to fall within the frequency band of the Laser Interferometer Gravitational Wave Observatory detector. Because of this feature the gravitational waves emitted by such loops can be detected in a periodic search rather than in burst or stochastic analysis. It is shown that, for interesting values of the string tension (10-10?G??10-8), the detector can observe loops at reasonably high redshifts and that detection is, in principle, possible. We compute the number of expected observations produced by such a process. For a 10 h search we find that this number is of order O(10-4). This is a consequence of the low effective number density of the loops traveling along the line of sight. However, small probabilities of reconnection and longer observation times can improve the result.

Florian Dubath and Jorge V. Rocha

2007-07-02T23:59:59.000Z

269

Lithospheric Thickness Modeled from Long Period Surface Wave Dispersion  

SciTech Connect (OSTI)

The behavior of surface waves at long periods is indicative of subcrustal velocity structure. Using recently published dispersion models, we invert surface wave group velocities for lithospheric structure, including lithospheric thickness, over much of the Eastern Hemisphere, encompassing Eurasia, Africa, and the Indian Ocean. Thicker lithosphere under Precambrian shields and platforms are clearly observed, not only under the large cratons (West Africa, Congo, Baltic, Russia, Siberia, India), but also under smaller blocks like the Tarim Basin and Yangtze craton. In contrast, it is found that remobilized Precambrian structures like the Saharan Shield and Sino-Korean Paraplatform do not have well-established lithospheric keels. The thinnest lithospheric thickness is found under oceanic and continental rifts, as well as along convergence zones. We compare our results to thermal models of continental lithosphere, lithospheric cooling models of oceanic lithosphere, lithosphere-asthenosphere boundary (LAB) estimates from S-wave receiver functions, and velocity variations of global tomography models. In addition to comparing results for the broad region, we examine in detail the regions of Central Africa, Siberia, and Tibet. While there are clear differences in the various estimates, overall the results are generally consistent. Inconsistencies between the estimates may be due to a variety of reasons including lateral and depth resolution differences and the comparison of what may be different lithospheric features.

Pasyanos, M E

2008-05-15T23:59:59.000Z

270

A renewal theory approach to periodic copolymers with adsorption  

E-Print Network [OSTI]

We consider a general model of a heterogeneous polymer chain fluctuating in the proximity of an interface between two selective solvents. The heterogeneous character of the model comes from the fact that the monomer units interact with the solvents and with the interface according to some charges that they carry. The charges repeat themselves along the chain in a periodic fashion. The main question concerning this model is whether the polymer remains tightly close to the interface, a phenomenon called localization, or whether there is a marked preference for one of the two solvents, thus yielding a delocalization phenomenon. In this paper, we present an approach that yields sharp estimates for the partition function of the model in all regimes (localized, delocalized and critical). This, in turn, makes possible a precise pathwise description of the polymer measure, obtaining the full scaling limits of the model. A key point is the closeness of the polymer measure to suitable Markov renewal processes, Markov renewal theory being one of the central mathematical tools of our analysis.

Francesco Caravenna; Giambattista Giacomin; Lorenzo Zambotti

2007-10-24T23:59:59.000Z

271

Periodically-driven quantum matter: the case of resonant modulations  

E-Print Network [OSTI]

Quantum systems can show qualitatively new forms of behavior when they are driven by fast time-periodic modulations. In the limit of large driving frequency, the long-time dynamics of such systems can often be described by a time-independent effective Hamiltonian, which is generally identified through a perturbative treatment. Here, we present a general formalism that describes time-modulated physical systems, in which the driving frequency is large, but resonant with respect to energy spacings inherent to the system at rest. Such a situation is currently exploited in optical-lattice setups, where superlattice (or Wannier-Stark-ladder) potentials are resonantly modulated so as to control the tunneling matrix elements between lattice sites, offering a powerful method to generate artificial fluxes for cold-atom systems. The formalism developed in this work identifies the basic ingredients needed to generate interesting flux patterns and band structures using resonant modulations. We also discuss the micro-motion underlying the dynamics, and illustrate its characteristics based on diverse dynamic-lattice configurations. It is shown that the impact of the micro-motion on physical observables strongly depends on the implemented scheme, suggesting that a theoretical description in terms of the effective Hamiltonian alone is generally not sufficient to capture the full time-evolution of the system.

N. Goldman; J. Dalibard; M. Aidelsburger; N. R. Cooper

2014-10-30T23:59:59.000Z

272

Periodic thermodynamics of laser-driven molecular motor  

Science Journals Connector (OSTI)

Operation of a laser-driven nano-motor inevitably generates a non-trivial amount of heat, which can possibly lead to instability or even hinder the motor's continual running. This work quantitatively examines the overheating problem for a recently proposed laser-operated molecular locomotive. We present a single-molecule cooling theory, in which molecular details of the locomotive system are explicitly treated. This theory is able to quantitatively predict cooling efficiency for various candidates of molecular systems for the locomotive, and also suggests concrete strategies for improving the locomotive's cooling. It is found that water environment is able to cool the hot locomotive down to room temperature within 100 picoseconds after photon absorption. This cooling time is a few orders of magnitude shorter than the typical time for laser operation, effectively preventing any overheating for the nano-locomotive. However, when the cooling is less effective in non-aqueous environment, residual heat may build up. A continuous running of the motor will then lead to a periodic thermodynamics, which is a common character of many laser-operated nano-devices.

Li Dan; Zheng Wen-Wei; Wang Zhi-Song

2008-01-01T23:59:59.000Z

273

Systematic calculations of plasma transport coefficients for the Periodic Table  

Science Journals Connector (OSTI)

Theoretical results are given for the ionization state, electrical conductivity, thermal conductivity, and thermoelectric coefficient for the entire Periodic Table over extreme ranges of temperature and density. A spherical average ion embedded in a uniform plasma background is used as a model to evaluate the electron densities of states, elastic scattering cross sections, and ionization states. These are then combined with one-component plasma structure factors to compute mean relaxation times and electrical resistivities according to an extended Ziman formula. The method of Lampe is used to compute thermal conductivities and thermoelectric coefficients from these values. Some experimental comparisons are made. The transport coefficients appear to be accurate for weakly and moderately correlated plasmas, but not for strongly correlated liquids or crystalline materials. The coefficients are tabulated as numerical functions of temperature and density. The tables extend in temperature from 10-2 to 104 eV. Density ranges depend upon atomic mass; lower limits range from 10-4 to 10-2 g/cm3, and upper limits range from 105 to 107 g/cm3. Indications are given of the regions of validity of the results.

George A. Rinker

1988-02-15T23:59:59.000Z

274

THE DECAYING LONG-PERIOD OSCILLATION OF A STELLAR MEGAFLARE  

SciTech Connect (OSTI)

We analyze and interpret the oscillatory signal in the decay phase of the U-band light curve of a stellar megaflare observed on 2009 January 16 on the dM4.5e star YZ CMi. The oscillation is well approximated by an exponentially decaying harmonic function. The period of the oscillation is found to be 32 minutes, the decay time about 46 minutes, and the relative amplitude 15%. As this observational signature is typical of the longitudinal oscillations observed in solar flares at extreme ultraviolet and radio wavelengths, associated with standing slow magnetoacoustic waves, we suggest that this megaflare may be of a similar nature. In this scenario, macroscopic variations of the plasma parameters in the oscillations modulate the ejection of non-thermal electrons. The phase speed of the longitudinal (slow magnetoacoustic) waves in the flaring loop or arcade, the tube speed, of about 230 km s{sup -1} would require a loop length of about 200 Mm. Other mechanisms, such as standing kink oscillations, are also considered.

Anfinogentov, S. [Institute of Solar Terrestrial Physics, Irkutsk (Russian Federation); Nakariakov, V. M. [Centre for Fusion, Space and Astrophysics, Physics Department, University of Warwick, Coventry CV4 7AL (United Kingdom); Mathioudakis, M. [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN (United Kingdom); Van Doorsselaere, T. [Centre for Mathematical Plasma Astrophysics, Department of Mathematics, KU Leuven, Celestijnenlaan 200B bus 2400, B-3001 Leuven (Belgium); Kowalski, A. F., E-mail: anfinogentov@iszf.irk.ru [NASA Goddard Space Flight Center, Code 671, Greenbelt, MD 20771 (United States)

2013-08-20T23:59:59.000Z

275

Handbook of GC/MS Fundamentals and Applications By Hans-Joachim Hübschmann. Wiley-VCH, Weinheim, Germany. 2001. xvi + 591 pp. 17.5 × 24.5 cm. ISBN 3-529-30170-4. $150.00.  

Science Journals Connector (OSTI)

Handbook of GC/MS Fundamentals and Applications By Hans-Joachim Hübschmann. ... However, the book goes far beyond this; it is a true “handbook” that will earn its place beside the instrument, where it will be used daily. ...

Rickey P. Hicks

2002-05-02T23:59:59.000Z

276

Study on Characteristics of Ultra-Long-Period Fiber Gratings Written by High-Frequency CO2 Laser Pulses  

Science Journals Connector (OSTI)

A novel ultra-long-period fiber grating with periods of up to several millimeters induced by high-frequency

Zhu, Tao; Rao, Yunjiang; Mo, Qiu-Ju

277

Effect of Irradiation on DNA Synthetic Period of the Mitotic Cycle in Cells  

Science Journals Connector (OSTI)

Kinetics of DNA synthesis in mitotic cycle of mouse corneal epithelial cells after single ?-irradiation (4 Gy) at the end of S period was studied by the method of radioautography. Normally, S period of corneal...

I. P. Shabalkin; E. Yu. Grigor’eva…

2012-05-01T23:59:59.000Z

278

E-Print Network 3.0 - au parlement periode Sample Search Results  

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

periode Search Powered by Explorit Topic List Advanced Search Sample search results for: au parlement periode Page: << < 1 2 3 4 5 > >> 1 Proposition de sujet de thse Les fonctions...

279

A New Methodology for Frequency Domain Analysis of Wave Energy Converters with Periodically Varying Physical Parameters  

E-Print Network [OSTI]

A New Methodology for Frequency Domain Analysis of Wave Energy Converters with Periodically Varying Methodology for Frequency Domain Analysis of Wave Energy Converters with Periodically Varying Physical of Mechanical Engineering) ABSTRACT Within a wave energy converter's operational bandwidth, device operation

Victoria, University of

280

An improved trigonometrically fitted P-stable Obrechkoff method for periodic initial-value problems  

Science Journals Connector (OSTI)

...1983; Jain 1988; Simos 1991b ; Stiefel Bettis 1969; Thomas 1984). Since Lambert et...the almost periodic problem of Stiefel Bettis (1969) and the nonlinear undamped Duffin's...almost periodic problem studied by Stiefel Bettis (1969): whose theoretical solution...

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

The Near-infrared Period-luminosity Relations of Cepheids in the Large Magellanic Cloud  

E-Print Network [OSTI]

We present near-infrared (J & Ks) observations of Cepheids in the Large Magellanic Cloud. The goals of these observations are to better characterize the Cepheid Period-Luminosity relation at these wavelengths, especially for periods below 10 days...

Mahzooni, Salma

2011-08-08T23:59:59.000Z

282

The solution of Cauchy's problem for the Toda lattice with limit periodic initial data  

SciTech Connect (OSTI)

Cauchy's problem for Toda lattices with initial data equal to the sum of a periodic and a rapidly decreasing sequence is solved with the use of the inverse scattering method. A method allowing one to find a limit periodic solution of the Toda lattice from a known periodic solution is described. The existence and uniqueness of a limit periodic solution is proved. Bibliography: 17 titles.

Khanmamedov, A Kh [Baku State University, Baku (Azerbaijan)

2008-04-30T23:59:59.000Z

283

Solutions to Test 1 Review Problems 1. Here are two sound waves. Identify which is periodic. For the periodic wave, sketch a  

E-Print Network [OSTI]

in Hz and BPM. Is the frequency within the range of human hearing? Answer. The periodic wave frequency is 1/0.01 = 100 Hz = 6000 BPM. 2. Functions. (a) For each function, determine whether and frequency =3 BPM (2) amplitude = 10 and fundamental period = 0.005 seconds. Answer. (1) since 3 BPM = 180 Hz

Hall, Rachel W.

284

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period  

E-Print Network [OSTI]

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period R (2006), Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period histories from ice coring of Greenland and Antarctica over the period 2 to 45 ka, using SO4 anomalies

Price, P. Buford

285

RESEARCH and RELATED BUDGET - SECTION A-B, BUDGET PERIOD 1  

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

SECTION A-B, BUDGET PERIOD 1 SECTION A-B, BUDGET PERIOD 1 *Budget Type: Project: *Name of Organization: *Budget Period: 1 Prefix *Last Name Suffix *Project Role Base Salary $ Cal. Months Acad. Months Sum. Months *Requested Salary ($) *Fringe Benefits ($) *Funds Requested ($) 1. Principal Investigator - $ - $ - $ - $ 2. - $ - $ - $ - $ 3. - $ - $ - $ - $ 4. - $ - $ - $ - $ 5. - $ - $ - $ - $ 6. - $ - $ - $ -

286

A ~60 Myr periodicity is common to marine-87Sr/86Sr, fossil biodiversity, and large-scale sedimentation: what does the periodicity reflect?  

E-Print Network [OSTI]

We find that the marine 87Sr/86Sr record shows a significant periodicity of 59.3 \\pm 3 Myr. The 87Sr/86Sr record is 171{\\deg} \\pm 12{\\deg}out of phase with a 62 (\\pm 3) Myr periodicity previously reported in the record of marine-animal diversity. These periodicities are close to 58 (\\pm 4) Myr cycles found for the number of gap-bounded sedimentary carbonate packages of North America We propose that these periodicities reflect the operation of a periodic "pulse of the Earth" in large-scale, Earth processes. These may be linked to mantle or plate-tectonic events, possibly uplift, which affects Earth's climate and oceans, and so the geochemistry, sedimentation, and biodiversity of the marine realm. Alternately, they may be linked to oscillation of the solar system normal to the plane of the galaxy.

Melott, Adrian L; Petersen, K D; McArthur, John M

2012-01-01T23:59:59.000Z

287

Detection and discrimination of the periodicity of prime numbers by discrete Fourier transform  

E-Print Network [OSTI]

A novel representation of a quasi-periodic modified von Mangoldt function L(n) on prime numbers and its decomposition into Fourier series has been investigated. We focus on some particular quantities characterizing the modified von Mangoldt function. The results indicate that prime number progression can be decomposed into periodic sequences. The main approach is to decompose it into sin or cosine function. Basically, it is applied to extract hidden periodicities in seemingly quasi periodic prime function. Numerical evidences were provided to confirm the periodic distribution of primes.

Levente Csoka

2015-01-27T23:59:59.000Z

288

BLM Announces Second Extension of Public Comment Period for Draft Solar PEIS  

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

BLM Announces Second Extension of Public Comment Period for Draft Solar PEIS BLM Announces Second Extension of Public Comment Period for Draft Solar PEIS U.S. DEPARTMENT OF THE INTERIORBUREAU OF LAND MANAGEMENT NEWS RELEASE Release Date: 04/15/11 Contacts: David Quick, (202) 912-7413 BLM Announces Second Extension of Public Comment Period for Draft Solar PEIS The Bureau of Land Management (BLM) today announced a two-week extension of the public comment period for the Draft Solar Programmatic Environmental Impact Statement (Draft Solar PEIS), a joint effort with the Department of Energy. The agencies had previously provided for a 120-day public comment period on the Draft Solar PEIS. Because of numerous requests, the agencies are extending the comment period by an additional two weeks beyond April 16, 2011. The comment period will now run until May 2, 2011. No additional public meetings will be held during the

289

Public Comment Period Re-Opened for the Uranium Leasing Program PEIS |  

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

Public Comment Period Re-Opened for the Uranium Leasing Program Public Comment Period Re-Opened for the Uranium Leasing Program PEIS Public Comment Period Re-Opened for the Uranium Leasing Program PEIS May 28, 2013 - 5:37pm Addthis Public Comment Period Re-Opened for the Uranium Leasing Program PEIS The U.S. Department of Energy is re-opening the public comment period for the Draft Uranium Leasing Program Programmatic Environmental Impact Statement (Draft ULP PEIS, DOE/EIS-0472D). DOE made the Draft ULP PEIS available for public comment on March 15, 2013 (78 FR 16500). The public comment period for the Draft ULP PEIS originally was to end on May 16, 2013, and an extension to May 31, 2013 was announced on April 23, 2013 (78 FR 23926). In response to a public request for additional review time, DOE re-opens the public comment period, which will now close on July 1,

290

Vriend en vijand. Een vergelijkend onderzoek naar de Nederlandse beleidsvoering met betrekking tot Suriname in de periode 1975-1982 en de periode 1988-1993.  

E-Print Network [OSTI]

??In de periode 1975-1982 stelden Nederlanders vele voorwaarden aan de Surinamers in ruil voor ontwikkelingshulp. Desalniettemin had dit niet tot het gewenste resultaat geleid.Na de… (more)

Meij, K. van der

2012-01-01T23:59:59.000Z

291

A ubiquitous ~62 Myr periodic fluctuation superimposed on general trends in fossil biodiversity: II, Evolutionary dynamics associated with periodic fluctuation in marine diversity  

E-Print Network [OSTI]

We investigate evolutionary dynamics related to periodicity fossil biodiversity. Coherent periodic fluctuation in origination/extinction of marine genera that survive 45 million years) do not participate in the periodic fluctuation in diversity and differ from those of "short-lived" genera. The difference between the evolutionary dynamics of these 2 genera classes indicates that the periodic pattern is not an artifact of variation in quality of the geologic record. The interplay of these two previously undifferentiated systems, together with the secular increase in abundance of "long-lived" genera, is probably the source of heretofore unexplained differences in evolutionary dynamics between the Paleozoic and post-Paleozoic as reported by others. Testing for cycles similar to the 62 Myr cycle in fossil biodiversity superimposed on the long-term trends of the Phanerozoic as described in Paper I, we find a significant (but weaker) signal in sedimentary rock packages, particularly carbonates, which suggests a con...

Melott, Adrian L

2010-01-01T23:59:59.000Z

292

EIS-0369: Notice of Public Comment Period Extension and Additional Public  

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

Notice of Public Comment Period Extension and Additional Notice of Public Comment Period Extension and Additional Public Meeting EIS-0369: Notice of Public Comment Period Extension and Additional Public Meeting Supplemental Yucca Mountain Rail Corridor and Rail Alignment The Department of Energy is now announcing an additional public meeting in Reno, Nevada and the public comment period also is being extended through December 12, 2006 for the Supplemental Yucca Mountain Rail Corridot and Rail Alignment Environmental Impact Statement. Notice of Public Comment Period Extension and Additional Public Meeting for the Supplemental Yucca Mountain Rail Corridot and Rail Alignment Environmental Impact Statement (DOE/EIS-0369) (November 2006 - 71 FR 65785) More Documents & Publications EIS-0250: Notice of Public Comment Period Extension and Additional Public

293

EIS-0426: Notice of Extension of Public Comment Period for the Draft  

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

EIS-0426: Notice of Extension of Public Comment Period for the EIS-0426: Notice of Extension of Public Comment Period for the Draft Site-Wide Environmental Impact Statement EIS-0426: Notice of Extension of Public Comment Period for the Draft Site-Wide Environmental Impact Statement In response to public comments and requests, the U.S. Department of Energy National Nuclear Security Administration Nevada Site Office is extending the public comment period for the Draft Site-wide Environmental Impact Statement for the Nevada National Security Site (NNSS) and Off-Site Locations in Nevada (DOE/EIS-0426). The formal comment period will close on December 2, 2011 rather than October 27, 2011. EIS-0426-DEIS-CommentExtension-2011.pdf EIS-0426-DEIS-NoticeofCommentExtension-2011.pdf More Documents & Publications EIS-0426: Notice of Extension of Comment Period

294

EIS-0426: Notice of Extension of Public Comment Period for the Draft  

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

Public Comment Period for the Public Comment Period for the Draft Site-Wide Environmental Impact Statement EIS-0426: Notice of Extension of Public Comment Period for the Draft Site-Wide Environmental Impact Statement In response to public comments and requests, the U.S. Department of Energy National Nuclear Security Administration Nevada Site Office is extending the public comment period for the Draft Site-wide Environmental Impact Statement for the Nevada National Security Site (NNSS) and Off-Site Locations in Nevada (DOE/EIS-0426). The formal comment period will close on December 2, 2011 rather than October 27, 2011. EIS-0426-DEIS-CommentExtension-2011.pdf EIS-0426-DEIS-NoticeofCommentExtension-2011.pdf More Documents & Publications EIS-0426: Notice of Extension of Comment Period

295

EIS-0305: Notice Extending the Public Scoping Period for the Environmental  

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

Notice Extending the Public Scoping Period for the Notice Extending the Public Scoping Period for the Environmental Impact Statement EIS-0305: Notice Extending the Public Scoping Period for the Environmental Impact Statement Transuranic Waste Treatment Facility at Oak Ridge, Tennessee The Department extends the public scoping period for a Transuranic Waste Treatment Facility at Oak Ridge, Tennessee. To ensure that the public has ample opportunity to provide comments since the public scoping meeting, the comment period is being extended until March 18, 1999. Notice of Intent To Prepare an Environmental Impact Statement for a Transuranic Waste Treatment Facility at Oak Ridge, Tennessee; Notice Extending the Public Scoping Period More Documents & Publications Audit Report: IG-0443 EIS-0309: Notice of Intent to Prepare a Site-Wide Environmental Impact

296

Attachment 4 Volume III Pricing Matrix for Phase-in Period.xls  

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

4 4 VOLUME III Logistics Services A-76 Study - Service Provider Price Offer for Phase in Period, Volume III. Service Provider Name: GSA Schedule Contract Number: Expiration Date of GSA Schedule Contract: Duration of Phase in Period: 9 Calendar Months Term of Performance Phase-In Period 10/01/2004 - 06/30/2005 Base Period Year One07/01/2005 - 06/30/2006 Year Two 07/01/2006 - 06/30/2007 Period Three 07/01/2007 - 09/30/2007 Option Period Year One 10/01/2007 - 09/30/2008 Year Two 10/01/2008 - 09/30/2009 1. PRIME SERVICE PROVIDER COMMERCIAL DISCOUNT ATO FEDERAL OR BASE LABOR PERCENTAGE COMMERCIAL PROPOSED TOTAL GSA LABOR RATE RATE/HOUR FROM GSA RATE BURDENED RATE HOURS PROPOSED COST 2. TEAM MEMBER (Subcontractor) COMMERCIAL DISCOUNT ATO FEDERAL OR BASE LABOR PERCENTAGE

297

Casimir Effect under Quasi-Periodic Boundary Condition Inspired by Nanotubes  

E-Print Network [OSTI]

When one studies the Casimir effect, the periodic (anti-periodic) boundary condition is usually taken to mimic a periodic (anti-periodic) structure for a scalar field living in a flat space with a non-Euclidean topology. However, there could be an arbitrary phase difference between the value of the scalar field on one endpoint of the unit structure and that on the other endpoint, such as the structure of nanotubes. Then, in this paper, a periodic condition on the ends of the system with an additional phase factor, which is called the ``quasi-periodic" condition, is imposed to investigate the corresponding Casimir effect. And an attractive or repulsive Casimir force is found, whose properties depend on the phase angle value. Especially, the Casimir effect disappears when the phase angle takes a particular value. High dimensional space-time case is also investigated.

Feng, Chao-Jun; Zhai, Xiang-Hua

2014-01-01T23:59:59.000Z

298

Casimir Effect under Quasi-Periodic Boundary Condition Inspired by Nanotubes  

E-Print Network [OSTI]

When one studies the Casimir effect, the periodic (anti-periodic) boundary condition is usually taken to mimic a periodic (anti-periodic) structure for a scalar field living in a flat space with a non-Euclidean topology. However, there could be an arbitrary phase difference between the value of the scalar field on one endpoint of the unit structure and that on the other endpoint, such as the structure of nanotubes. Then, in this paper, a periodic condition on the ends of the system with an additional phase factor, which is called the ``quasi-periodic" condition, is imposed to investigate the corresponding Casimir effect. And an attractive or repulsive Casimir force is found, whose properties depend on the phase angle value. Especially, the Casimir effect disappears when the phase angle takes a particular value. High dimensional space-time case is also investigated.

Chao-Jun Feng; Xin-Zhou Li; Xiang-Hua Zhai

2013-12-06T23:59:59.000Z

299

Non-Abelian Geometric Phase, Floquet Theory, and Periodic Dynamical Invariants  

E-Print Network [OSTI]

For a periodic Hamiltonian, periodic dynamical invariants may be used to obtain non-degenerate cyclic states. This observation is generalized to the degenerate cyclic states, and the relation between the periodic dynamical invariants and the Floquet decompositions of the time-evolution operator is elucidated. In particular, a necessary condition for the occurrence of cyclic non-adiabatic non-Abelian geometrical phase is derived. Degenerate cyclic states are obtained for a magnetic dipole interacting with a precessing magnetic field.

Ali Mostafazadeh

1998-10-22T23:59:59.000Z

300

Non-Abelian Geometric Phase, Floquet Theory, and Periodic Dynamical Invariants  

E-Print Network [OSTI]

For a periodic Hamiltonian, periodic dynamical invariants may be used to obtain non-degenerate cyclic states. This observation is generalized to the degenerate cyclic states, and the relation between the periodic dynamical invariants and the Floquet decompositions of the time-evolution operator is elucidated. In particular, a necessary condition for the occurrence of cyclic non-adiabatic non-Abelian geometrical phase is derived. Degenerate cyclic states are obtained for a magnetic dipole interacting with a precessing magnetic field.

Mostafazadeh, A

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

On the Periodic Mild Solutions to Complete Higher Order Differential Equations on  

E-Print Network [OSTI]

-periodic solution for each continuous T-periodic forcing term f if and only if k = 2kt/T, k ZZ, are not eigen-values statement generally fails. When A generates a strongly continuous semi- group, periodicity of solutions(J) denotes the space of E-valued integrable functions on J with f Lp(J) = 1 0 f(t) p dt

Nguyen, Lan

302

Three Minutes to Midnight: Civil Defense in the Late Cold War Period.  

E-Print Network [OSTI]

??This thesis examines civil defense in the United States under the Nixon, Carter and Reagan administrations. Throughout the late Cold War period civil defense policy… (more)

Donelson, Brendan

2014-01-01T23:59:59.000Z

303

Measuring the rotation period distribution of field M-dwarfs with Kepler  

E-Print Network [OSTI]

We have analysed 10 months of public data from the Kepler space mission to measure rotation periods of main-sequence stars with masses between 0.3 and 0.55 M_sun. To derive the rotational period we introduce the autocorrelation function and show that it is robust against phase and amplitude modulation and residual instrumental systematics. Of the 2483 stars examined, we detected rotation periods in 1570 (63.2%), representing an increase of a factor ~ 30 in the number of rotation period determination for field M-dwarfs. The periods range from 0.37-69.7 days, with amplitudes ranging from 1.0-140.8 mmags. The rotation period distribution is clearly bimodal, with peaks at ~ 19 and ~ 33 days, hinting at two distinct waves of star formation, a hypothesis that is supported by the fact that slower rotators tend to have larger proper motions. The two peaks of the rotation period distribution form two distinct sequences in period-temperature space, with the period decreasing with increasing temperature, reminiscent of ...

McQuillan, Amy; Mazeh, Tsevi

2013-01-01T23:59:59.000Z

304

State of Connecticut Middle Distillate Monitoring Program for the period July 1986-June 1987: (Final report)  

SciTech Connect (OSTI)

Heating oil prices both retail and wholesale and stock levels are presented for the state of Connecticut for the period October 1, 1986 through May 4, 1987. (AT)

Not Available

1987-06-01T23:59:59.000Z

305

Computer Assisted 'Proof' of the Global Existence of Periodic Orbits in the Rössler System  

E-Print Network [OSTI]

The numerical optimized shooting method for finding periodic orbits in nonlinear dynamical systems was employed to determine the existence of periodic orbits in the well-known R\\"ossler system. By optimizing the period $T$ and the three system parameters, $a$, $b$ and $c$, simultaneously, it was found that, for any initial condition $(x_0,y_0,z_0) \\in \\Re^3$, there exists at least one set of optimized parameters corresponding to a periodic orbit passing through $ (x_0,y_0,z_0)$. After a discussion of this result it was concluded that its analytical proof may present an interesting new mathematical challenge.

A. E. Botha; W. Dednam

2014-08-14T23:59:59.000Z

306

E-Print Network 3.0 - a20 regulates period Sample Search Results  

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

Rules (2) If inspection required by paragraph (h) Summary: is a crucial step in NOAA's review of its existing regulations. NOAA recognizes that the public comment period... ,...

307

EIS-0299: Notice of Extension of Comment Period for the Environmental...  

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

Notice of Extension of Comment Period for the Environmental Impact Statement Proposed Production of Plutonium-238 for Use in Advanced Radioisotope Power Systems for Future...

308

The critical Z-invariant Ising model via dimers: the periodic case  

E-Print Network [OSTI]

The critical Z-invariant Ising model via dimers: the periodic case C´edric Boutillier , B´eatrice de Tili`ere Abstract We study a large class of critical two-dimensional Ising models namely critical Z-invariant Ising models on periodic graphs, example of which are the classical Z2 , triangular

Boutillier, Cédric

309

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ SYSTEM  

E-Print Network [OSTI]

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ stability of spatially periodic waves for the Boussinesq equa- tion (the cases p = 2, 3) and the Klein interest will be mainly in two PDE - the Boussinesq equation and the Klein-Gordon-Zakharov system, although

Stanislavova, Milena

310

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ SYSTEM  

E-Print Network [OSTI]

LINEAR STABILITY ANALYSIS FOR PERIODIC TRAVELING WAVES OF THE BOUSSINESQ EQUATION AND THE KGZ stability of spatially periodic waves for the Boussinesq equa- tion (the cases p = 2, 3) and the Klein in two PDEs - the Boussinesq equation and the Klein-Gordon-Zakharov system, although the methods that we

Stanislavova, Milena

311

IMPROVED LOCAL WELL-POSEDNESS FOR THE PERIODIC "GOOD" BOUSSINESQ EQUATION  

E-Print Network [OSTI]

IMPROVED LOCAL WELL-POSEDNESS FOR THE PERIODIC "GOOD" BOUSSINESQ EQUATION SEUNGLY OH, ATANAS STEFANOV ABSTRACT. We prove that the "good" Boussinesq model is locally well-posed in the space H- �H--2 the Cauchy problem for the periodic "good" Boussinesq problem (1) utt + uxxxx - uxx + (up )xx = 0, (t, x) R1

Oh, Seungly

312

Quantum reflection and interference of matter waves from periodically doped surfaces  

E-Print Network [OSTI]

We show that periodically doped, flat surfaces can act as reflective diffraction gratings for atomic and molecular matter waves. The diffraction element is realized by exploiting that charged dopants locally suppress quantum reflection from the Casimir-Polder potential. We present a general quantum scattering theory for reflection off periodically charged surfaces and discuss the requirements for the observation of multiple diffraction peaks.

Benjamin A. Stickler; Uzi Even; Klaus Hornberger

2015-01-15T23:59:59.000Z

313

The role of money and monetary policy in crisis periods : the Euro  

E-Print Network [OSTI]

The role of money and monetary policy in crisis periods : the Euro area case Research Center ESSEC of money and monetary policy in crisis periods: the Euro area case Jonathan Benchimol and André Fourçansy on the role of money and monetary policy during crises. The role of separability between money and consumption

Boyer, Edmond

314

INVERTIBLE SUBSTITUTIONS WITH A COMMON PERIODIC HUI RAO AND ZHI-YING WEN  

E-Print Network [OSTI]

INVERTIBLE SUBSTITUTIONS WITH A COMMON PERIODIC POINT HUI RAO AND ZHI-YING WEN Abstract. We characterize the invertible substitutions over a two-letter alphabet which share a common periodic point (or for some n 1. A substitution is said invertible if it is an automorphism of the free group F generated

Rao, Hui

315

EDFA Gain Flattening Using Long-Period Fibre Gratings Based on the Electric Arc Technique  

E-Print Network [OSTI]

of new stresses during the electric arc discharges as the main mechanism for their formation [5]. #12EDFA Gain Flattening Using Long-Period Fibre Gratings Based on the Electric Arc Technique O. Frazão of the long-period fibre grating is based on the electric arc technique. 1. Introduction. The gain flattening

Haddadi, Hamed

316

Understanding Quasi-Periodic Fieldlines and Their Topology in Toroidal Magnetic Fields  

E-Print Network [OSTI]

the periodicity analysis of these two functions, we are able to devise a heuristic yet robust and reliable surfaces. Different from our previous method [12], in this work we resort to the periodicity analysis the wall of the fusion reactor. To distinguish the magnetic island chains from other flux surfaces, we

Chen, Guoning

317

Nonlinear dielectric response of periodic composite materials A. Kolpakov & A. K. Tagantsev & L. Berlyand &  

E-Print Network [OSTI]

periodic composite (a matrix of a large dielectric constant ferro- electric material with linear dielectric of ferroelectric/dielectric composites. A typical example is a (Ba,Sr)TiO3 ceramic fabricated with addition of MgNonlinear dielectric response of periodic composite materials A. Kolpakov & A. K. Tagantsev & L

Berlyand, Leonid

318

Periodic index separate confinement heterostructure multiple quantum well laser' n by organometailic vapor  

E-Print Network [OSTI]

similar conditions. The PINSCH laser uses cladding layers comprised of periodic semiconductor multilayers applied to 980 nm InGaAs/AlGaAs quantum well lasers.6 The cladding layers consist of alternating layersPeriodic index separate confinement heterostructure multiple quantum well laser' n

Florida, University of

319

Attractiveness of periodic orbits in parametrically forced systems with time-increasing friction  

E-Print Network [OSTI]

Attractiveness of periodic orbits in parametrically forced systems with time-increasing friction-dimensional systems subject to a periodic force and study numer- ically how a time-varying friction affects oscillator in the presence of friction. We find that, if the damping coefficient increases in time up

320

Positive solutions of periodic boundary value problems for impulsive differential equations  

Science Journals Connector (OSTI)

In this paper, we discuss the existence of positive solutions of periodic boundary value problems for second-order impulsive equations. The existence and multiplicity of positive solutions are established and the proof is based upon fixed point theorems ... Keywords: Fixed point theorem, Impulsive differential equations, Periodic boundary value problems, Positive solution

Weibing Wang; Xiangling Fu; Xuxin Yang

2009-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Weekly Security Incident Log Period of Nov 27 -Dec 2, 2012  

E-Print Network [OSTI]

was obtained. 11/28/2012 01:41 PM Suspicious Person 2012-002119 ROSS BUILDING - NORTH TOWER Private PropertyWeekly Security Incident Log Period of Nov 27 - Dec 2, 2012 Incident No. Reported Date Building:41 AM Theft, Under Weekly Security Incident Log Printed: 12/3/2012 3:18:11 PM 1 Period of Nov 27 - Dec 2

322

High order asymptotics for the electromagnetic scattering from thin periodic layers : the 3D  

E-Print Network [OSTI]

High order asymptotics for the electromagnetic scattering from thin periodic layers : the 3D of electromagnetic waves by a thin periodic layer made of an array of regularly-spaced obstacles. The size, they satisfy electrostatic problems posed in an infinite 3D strip that require a careful analysis. Error

Boyer, Edmond

323

Comparison of quantization of charge transport in periodic and open pumps  

E-Print Network [OSTI]

Comparison of quantization of charge transport in periodic and open pumps G.M. Graf and G. Ortelli the charges transported in two systems, a spatially periodic and an open quantum pump, both depending physical situations become the same, i.e., that of a large open pump. 1 Introduction In this note we

324

QR-Coded Audio Periodic Table of the Elements: A Mobile-Learning Tool  

Science Journals Connector (OSTI)

QR-Coded Audio Periodic Table of the Elements: A Mobile-Learning Tool ... A quick response coded audio periodic table of the elements (QR-APTE) was developed using free online resources. ... (4) In this regard the existence of organized audio chemical information is highly desirable, speeding up the learning process by avoiding Braille reading. ...

Vasco D. B. Bonifácio

2012-01-30T23:59:59.000Z

325

ENOC 2014, July 6-11, 2014, Vienna, Austria Periodic motions of coupled impact oscillators  

E-Print Network [OSTI]

the latter case concerns thin oscillating mechanical structures (a string under tension or a clamped beamENOC 2014, July 6-11, 2014, Vienna, Austria Periodic motions of coupled impact oscillators Vincent. Summary. We study existence of time-periodic oscillations in a chain of coupled impact oscillators

326

EIS-0385: Notice to Extend the Public Scoping Period and Reschedule Public  

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

EIS-0385: Notice to Extend the Public Scoping Period and Reschedule EIS-0385: Notice to Extend the Public Scoping Period and Reschedule Public Scoping Meetings EIS-0385: Notice to Extend the Public Scoping Period and Reschedule Public Scoping Meetings Strategic Petroleum Reserve Due to the extraordinary circumstances created by Hurricane Katrina in the region where the proposed action and public scoping meetings will take place, DOE has extended the public scoping period and revised the dates and locations of the public scoping meetings originally announced in the Notice of Intent to Prepare an Environmental Impact Statement 70 FR 52088; September 1, 2005). DOE/EIS-0385, Department of Energy, Environmental Impact Statement: Site Selection for the Expansion of the Strategic Petroleum Reserve, Notice to Extend the Public Scoping Period and Reschedule Public Scoping Meetings, 70

327

Microsoft Word - PARS II Process Document - Close Period 2013-04-29 _FINAL_  

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

PARS II APM DepSec Monthly Report & Close Period, V-2013-04-29 Page 1 PARS II APM DepSec Monthly Report & Close Period, V-2013-04-29 Page 1 PARS II Process Document APM DEPSEC MONTHLY REPORT & CLOSE PERIOD PURPOSE The purpose of this document is to describe the process of preparing the APM Deputy Secretary Monthly Report and closing the DOE Reporting Period in PARS II. SCOPE This process applies to the Headquarters Office of Acquisition and Project Management (HQ OAPM) and its support contractors as the organization that prepares the monthly reports and closes the monthly reporting period. The process covers data validation and verification; running, distributing and archiving of reports; and

328

EIS-0387: Extension of Scoping Period for the Notice of Intent To Prepare a  

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

Extension of Scoping Period for the Notice of Intent To Extension of Scoping Period for the Notice of Intent To Prepare a Site-Wide Environmental Impact Statement EIS-0387: Extension of Scoping Period for the Notice of Intent To Prepare a Site-Wide Environmental Impact Statement Y-12 National Security Complex Project, Oak Ridge, Tennessee The National Nuclear Security Administration (NNSA), an agency within the U.S. Department of Energy (DOE), is extending the scoping period for the Site-Wide Environmental Impact Statement (SWEIS) for the Y-12 National Security Complex (Y-12), located at the junction of Bear Creek Road and Scarboro Road in Anderson County, Tennessee, near the City of Oak Ridge, Tennessee. National Nuclear Security Administration Extension of Scoping Period for the Notice of Intent To Prepare a Site-Wide Environmental Impact Statement,

329

EIS-0380: Notice to Extend Comment Period on the Draft Site-Wide  

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

to Extend Comment Period on the Draft Site-Wide to Extend Comment Period on the Draft Site-Wide Environmental Impact Statement EIS-0380: Notice to Extend Comment Period on the Draft Site-Wide Environmental Impact Statement Continued Operation of Los Alamos National Laboratory, Los Alamos, New Mexico In response to requests for additional time to review and comment on the document, NNSA is extending the public comment period until September 20, 2006. DOE/EIS-0380, Department of Energy, National Nuclear Security Administration, Extension of Comment Period on the Draft Site-Wide Environmental Impact Statement for Continued Operation of Los Alamos National Laboratory, Los Alamos, New Mexico, 76 FR 40352 (August 2006) More Documents & Publications EIS-0380: DOE Notice of Availability of the Draft Site-Wide Environmental

330

Proposed rule: re-opening of public comment period | Department of Energy  

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

Proposed rule: re-opening of public comment period Proposed rule: re-opening of public comment period Proposed rule: re-opening of public comment period Proposed rule: re-opening of public comment period. The U.S. Department of Energy (DOE) is re-opening the public comment period for proposed amendments to its regulations governing compliance with the National Environmental Policy Act (NEPA), made available for public comment on January 3, 2011 (76 FR 214). This is being done in response to a request on behalf of multiple organizations CX rulemaking files More Documents & Publications Public Comment Received on Proposed Revisions to DOE's NEPA Rule: 10 CFR Part 1021 Federal Register Notice: National Nuclear Security Administration Site-Wide Environmental Impact Statement for Sandia National Laboratories, New Mexico

331

EIS-0385: Notice to Extend the Public Scoping Period and Reschedule Public  

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

Notice to Extend the Public Scoping Period and Reschedule Notice to Extend the Public Scoping Period and Reschedule Public Scoping Meetings EIS-0385: Notice to Extend the Public Scoping Period and Reschedule Public Scoping Meetings Strategic Petroleum Reserve Due to the extraordinary circumstances created by Hurricane Katrina in the region where the proposed action and public scoping meetings will take place, DOE has extended the public scoping period and revised the dates and locations of the public scoping meetings originally announced in the Notice of Intent to Prepare an Environmental Impact Statement 70 FR 52088; September 1, 2005). DOE/EIS-0385, Department of Energy, Environmental Impact Statement: Site Selection for the Expansion of the Strategic Petroleum Reserve, Notice to Extend the Public Scoping Period and Reschedule Public Scoping Meetings, 70

332

Mirant: Summary of Monitored SO2 Concentrations During Periods of Highest  

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

Mirant: Summary of Monitored SO2 Concentrations During Periods of Mirant: Summary of Monitored SO2 Concentrations During Periods of Highest Impact Mirant: Summary of Monitored SO2 Concentrations During Periods of Highest Impact Docket No. EO-05-01: Tables showing a summary of monitored SO2 concentrations during periods of highest impact as well as ERMOD modeling results for SO2 scenarios. Mirant: Summary of Monitored SO2 Concentrations During Periods of Highest Impact More Documents & Publications Answer of Potomac Electric Power Company and PJM lnterconnection, L.L.C. to the October 6, 2005 motion filed by the Virginia Department of Environmental Quality Mirant Potomac, Alexandria, Virginia: Maximum Impacts Predicted by AERMOD-PRIME, Units 3, 1, 2 SO2 Case Mirant Potomac, Alexandria, Virginia: Maximum Impacts Predicted by

333

EIS-0250: Notice of Public Comment Period Extension and Additional Public  

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

Public Comment Period Extension and Additional Public Comment Period Extension and Additional Public Meeting EIS-0250: Notice of Public Comment Period Extension and Additional Public Meeting Geologic Repository for the Disposal of Spent Nuclear Fuel and High-Level Radioactive Waste at Yucca Mountain, Nye County, NV Based on input from the public, DOE is now announcing an additional public meeting in Reno, Nevada. The public comment period also is being extended through December 12, 2006. Notice of Public Comment Period Extension and Additional Public Meeting on the Supplement to the Final Environmental Impact Statement for a Geologic Repository for the Disposal of Spent Nuclear Fuel and High-Level Radioactive Waste at Yucca Mountain, Nye County, Nevada, DOE/EIS-0250 (71 FR 65786) (November 2006) More Documents & Publications

334

Department of Energy Extends Comment Period on Proposed Revisions to its  

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

Extends Comment Period on Proposed Revisions Extends Comment Period on Proposed Revisions to its NEPA Rules Department of Energy Extends Comment Period on Proposed Revisions to its NEPA Rules February 17, 2011 - 5:29pm Addthis The Department of Energy today announced that, in response to requests from a number of parties, it has re-opened the public comment period on its proposed revisions to the Department's NEPA rules. The public comment period will be extended three weeks and will now close on March 7, 2011. DOE, on January 3, 2011, issued a Notice of Proposed Rulemaking to amend its regulations governing compliance with the National Environmental Policy Act (NEPA). The proposals focus primarily on the Department's categorical exclusion provisions, and reflect the first update to these provisions in

335

EIS-0299: Notice of Extension of Comment Period for the Environmental  

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

9: Notice of Extension of Comment Period for the 9: Notice of Extension of Comment Period for the Environmental Impact Statement EIS-0299: Notice of Extension of Comment Period for the Environmental Impact Statement Proposed Production of Plutonium-238 for Use in Advanced Radioisotope Power Systems for Future Space Missions DOE is extending the public scoping period on the environmental impact statement (EIS) for the Proposed Production of Plutonium-238 for Use in Advanced Radioisotope Power Systems for Future Space Missions from November 4, 1998, to January 4, 1999. Notice of Extension of Comment Period for the Environmental Impact Statement on the Proposed Production of Plutonium-238 for Use in Advanced Radioisotope Power Systems for Future Space Missions, DOE/EIS-0299 (November 1998) (63 FR 59551) More Documents & Publications

336

The Spin Periods and Rotational Profiles of Neutron Stars at Birth  

Science Journals Connector (OSTI)

We present results from an extensive set of one- and two-dimensional radiation-hydrodynamic simulations of the supernova core-collapse, bounce, and postbounce phases and focus on the proto-neutron star (PNS) spin periods and rotational profiles as a function of initial iron core angular velocity, degree of differential rotation, and progenitor mass. For the models considered, we find a roughly linear mapping between initial iron core rotation rate and PNS spin. The results indicate that the magnitude of the precollapse iron core angular velocities is the single most important factor in determining the PNS spin. Differences in progenitor mass and degree of differential rotation lead only to small variations in the PNS rotational period and profile. Based on our calculated PNS spins at ~200-300 ms after bounce and assuming angular momentum conservation, we estimate final neutron star rotation periods. We find periods of 1 ms and shorter for initial central iron core periods of 10 s. This is appreciably shorter than what previous studies have predicted and is in disagreement with current observational data from pulsar astronomy. After considering possible spin-down mechanisms that could lead to longer periods, we conclude that there is no mechanism that can robustly spin down a neutron star from ~1 ms periods to the "injection" periods of tens to hundreds of milliseconds observed for young pulsars. Our results indicate that, given current knowledge of the limitations of neutron star spin-down mechanisms, precollapse iron cores must rotate with periods of around 50-100 s to form neutron stars with periods generically near those inferred for the radio pulsar population.

Christian D. Ott; Adam Burrows; Todd A. Thompson; Eli Livne; Rolf Walder

2006-01-01T23:59:59.000Z

337

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

338

Beamline 8.0.1  

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

8.0.1 Print 8.0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

339

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

340

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

Note: This page contains sample records for the topic "5-cm period undulator" 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

Beamline 8.0.1  

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

8.0.1 Print 8.0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

342

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

343

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

344

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

345

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

346

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

347

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

348

Beamline 8.0.1  

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

8.0.1 Print 8.0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

349

Beamline 8.0.1  

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

0.1 Print 0.1 Print Surface and materials science, soft x-ray fluorescence (SXF), open port Scientific disciplines: Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system Endstations: 8.0.1.1: Soft x-ray fluorescence (SXF) spectrometer 8.0.1.2: Open port 8.0.1.3: Wet-RIXS 8.0.1.4: Nano-NEXAFS 8.0.1.5: Bio-NEXAFS GENERAL BEAMLINE INFORMATION Operational Yes Proposal cycle Proposals for General Sciences Beamlines (6-month cycle) Source characteristics 5-cm period undulator (U5) (first, third, and fifth harmonics) Energy range 80-1250 eV Monochromator SGM (gratings: 150, 380, 925 lines/mm) Flux (1.9 GeV, 400 mA) 1011 to 6 x 1015 photons/s (resolution and energy dependent) Resolving power (E/ΔE) 7000 Scientific disciplines Green energy sciences, material sciences, nanosciences, surfaces sciences, correlated electron system.

350

SPECTROSCOPIC EVIDENCE FOR A 5.4 MINUTE ORBITAL PERIOD IN HM CANCRI  

SciTech Connect (OSTI)

HM Cancri is a candidate ultracompact binary white dwarf with an apparent orbital period of only 5.4 minutes, as suggested by X-ray and optical light-curve modulations on that period, and by the absence of longer-period variability. In this Letter, we present Keck-I spectroscopy which shows clear modulation of the helium emission lines in both radial velocity and amplitude on the 5.4 minute period and no other. The data strongly suggest that the binary is emitting He I 4471 from the irradiated face of the cooler, less massive star, and He II 4686 from a ring around the more massive star. From their relative radial velocities, we measure a mass ratio q = 0.50 {+-} 0.13. We conclude that the observed 5.4 minute period almost certainly represents the orbital period of an interacting binary white dwarf. We thus confirm that HM Cnc is the shortest period binary star known: a unique test for stellar evolution theory, and one of the strongest known sources of gravitational waves for LISA.

Roelofs, Gijs H. A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Rau, Arne [Astronomy Department, California Institute of Technology, Pasadena, CA 91125 (United States); Marsh, Tom R.; Steeghs, Danny [Department of Physics, University of Warwick, Coventry, CV4 7AL (United Kingdom); Groot, Paul J.; Nelemans, Gijs [Department of Astrophysics, Radboud University Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen (Netherlands)], E-mail: groelofs@cfa.harvard.edu, E-mail: arau@mpe.mpg.de

2010-03-10T23:59:59.000Z

351

Rotation Periods of 34,030 Kepler Main-Sequence Stars: The Full Autocorrelation Sample  

E-Print Network [OSTI]

We analyzed 3 years of data from the Kepler space mission to derive rotation periods of main-sequence stars below 6500 K. Our automated autocorrelation-based method detected rotation periods between 0.2 and 70 days for 34,030 (25.6%) of the 133,030 main-sequence Kepler targets (excluding known eclipsing binaries and Kepler Objects of Interest), making this the largest sample of stellar rotation periods to date. In this paper we consider the detailed features of the now well-populated period-temperature distribution and demonstrate that the period bimodality, first seen by McQuillan, Aigrain & Mazeh (2013) in the M-dwarf sample, persists to higher masses, becoming less visible above 0.6 M_sun. We show that these results are globally consistent with the existing ground-based rotation-period data and find that the upper envelope of the period distribution is broadly consistent with a gyrochronological age of 4.5 Gyrs, based on the isochrones of Barnes (2007), Mamajek & Hillenbrand (2008) and Meibom et al...

McQuillan, Amy; Aigrain, Suzanne

2014-01-01T23:59:59.000Z

352

Failure Rates and Publication Status: Periodicals Reviewed in Library Journal (1980–2005) and Database Accuracy  

Science Journals Connector (OSTI)

Life spans of periodicals are described for all titles reviewed in Library Journal's (LJ) “Magazines” column from 1980 through 2005 using data from WorldCat, EBSCO's Serials Directory and Ulrichsweb. Fifty-four percent of the periodicals reviewed in LJ have failed. The highest rate of failure is in the first few years of publication, but there remains a substantial failure rate thereafter. The many challenges of keeping accurate records on end dates for periodicals are discussed in the context of cooperative cataloging under CONSER's leadership. The relative strengths and weaknesses of data in WorldCat, Serials Directory and Ulrichsweb are discussed and quantified.

Steve Black

2010-01-01T23:59:59.000Z

353

Reconstruction of spatial patterns of climatic anomalies during the medieval warm period (AD 900-1300)  

SciTech Connect (OSTI)

The workshop will focus on climatic variations during the Medieval Warm Period or Little Climatic Optimum. The nominal time interval assigned to this period is AD 900--1300, but climate information available during the century or two preceding and following this episode is welcome. The aims of the workshop will be to: examine the available evidence for the existence of this episode; assess the spatial and temporal synchronicity of the climatic signals; discuss possible forcing mechanisms; and identify areas and paleoenvironmental records where additional research efforts are needed to improve our knowledge of this period. This document consists of abstracts of eighteen papers presented at the meeting.

Diaz, H.F. [National Oceanic and Atmospheric Administration, Boulder, CO (United States). Environmental Research Labs.; Hughes, M.K. [Arizona Univ., Tucson, AZ (United States). Lab. of Tree-Ring Research

1992-12-31T23:59:59.000Z

354

Connection between the period and the amplitude of the Blazhko effect  

E-Print Network [OSTI]

We found a possible relationship between the modulation period and the amplitude of the Blazhko RR Lyrae stars: long modulation period generally implies high modulation amplitude while the short modulation period results in small amplitude. Although this effect is much more a tendency than a strict rule, it can be detected easily in the space-born time series data produced by Kepler and CoRoT. Good quality ground-based data show this relation, too. This phenomenon could give us constraints for the physics of the Blazhko effect.

Benk?, J M

2014-01-01T23:59:59.000Z

355

Real world issues for the new soft x-ray synchrotron sources  

SciTech Connect (OSTI)

A new generation of synchrotron radiation light sources covering the VUV, soft x-ray and hard x-ray spectral regions is under construction in several countries. They are designed specifically to use periodic magnetic undulators and low-emittance electron or positron beams to produce high-brightness near-diffraction-limited synchrotron radiation beams. An introduction to the properties of undulator radiation is followed by a discussion of some of the challenges to be faced at the new facilities. Examples of predicted undulator output from the Advanced Light Source, a third generation 1--2 GeV storage ring optimized for undulator use, are used to highlight differences from present synchrotron radiation sources, including high beam power, partial coherence, harmonics, and other unusual spectral and angular properties of undulator radiation. 8 refs., 2 figs.

Kincaid, B.M.

1991-05-01T23:59:59.000Z

356

EIS-0374: Notice of Extension of Comment Period | Department of Energy  

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

Notice of Extension of Comment Period Notice of Extension of Comment Period EIS-0374: Notice of Extension of Comment Period Klondike III/Biglow Canyon Wind Integration Project This notice extends the close of comment for scoping from the previously published May 13, 2005 to January 5, 2006. Bonneville Power Administration (BPA) is preparing its Klondike III/Biglow Canyon Wind Integration EIS under the National Environmental Policy Act (NEPA). BPA is currently considering a proposed interconnection requested by PPM Energy, Inc. (PPM), to integrate electrical power from their proposed Klondike III Wind Project into the Federal Columbia River Transmission System (FCRTS). Bonneville Power Administration Klondike III/Biglow Canyon Wind Integration Project Notice of Comment Period, DOE/EIS-0374 (December 2005 - 70 FR

357

DOE Extends Comment Period on Notice of Inquiry Under the Energy  

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

Notice of Inquiry Under the Energy Notice of Inquiry Under the Energy Independence and Security Act DOE Extends Comment Period on Notice of Inquiry Under the Energy Independence and Security Act August 18, 2010 - 4:33pm Addthis Today, in response to a formal request, General Counsel Scott Blake Harris approved a 30-day extension of the public comment period on DOE's Notice of Inquiry (75 FR 43945) soliciting comment on the development of regulations to carry out section 934 of the Energy Independence and Security Act of 2007, which implements the Convention on Supplementary Compensation for Nuclear Damage. The public comment period will be extended to October 27, 2010. The signed extension which is provided here, will be published shortly in the Federal Register. Addthis Related Articles DOE Extends Comment Period on Notice of Inquiry Under the Energy

358

Geothermal R and D Project report for period April 1, 1976 to June 30, 1976  

Open Energy Info (EERE)

report for period April 1, 1976 to June 30, 1976 report for period April 1, 1976 to June 30, 1976 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geothermal R and D Project report for period April 1, 1976 to June 30, 1976 Details Activities (1) Areas (1) Regions (0) Abstract: Progress during April to July 1976 in research on geothermal energy is reported. The experiments are performed in the Raft River Valley, Idaho, a hydrothermal resource site with water temperatures below 150/sup 0/C. During this period, a third well, RRGE-3 was drilled and well production was tested, testing of a direct contact heat exchanger continued, design and cost estimating continued on a 40 MW (th) organic-binary heat exchange facility, agricultural studies of irrigation with geothermal water progressed, and down-hole data was obtained from

359

EA-1592: Extension of Comment Period of the Draft Environmental Assessment  

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

Extension of Comment Period of the Draft Environmental Extension of Comment Period of the Draft Environmental Assessment EA-1592: Extension of Comment Period of the Draft Environmental Assessment Modernization of Facilities and Infrastructure for the Non-Nuclear Production Activities Conducted at the Kansas City Plant In the interest of maximizing public participation, GSA and NNSA are extending the public comment period until Wednesday, January 30, 2008. The United States General Services Administration (GSA) and the United States Department of Energy's National Nuclear Security Administration (NNSA) will prepare an Environmental Assessment (EA), DOE/EA-1592, to relocate certain non-nuclear component production and procurement activities currently conducted at NNSA's Kansas City Plant (KCP) to a smaller new

360

EIS-0350-S1: Extension of the Public Review and Comment Period and  

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

Extension of the Public Review and Comment Period and Extension of the Public Review and Comment Period and Announcement of an Additional Public Hearing EIS-0350-S1: Extension of the Public Review and Comment Period and Announcement of an Additional Public Hearing Nuclear Facility Portion of the Chemistry and Metallurgy Research Building Replacement Project at Los Alamos National Laboratory, Los Alamos, New Mexico DOE/EIS-0350, Department of Energy, National Nuclear Security Administration Extension of the Public Review and Comment Period and Announcement of an Additional Public Hearing for the Draft Supplemental Environmental Impact Statement for the Nuclear Facility Portion of the Chemistry and Metallurgy Research Building Replacement Project at Los Alamos National Laboratory, Los Alamos, New Mexico, 76 FR 28222 (May 2011)

Note: This page contains sample records for the topic "5-cm period undulator" 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

EIS-0374: Notice of Extension of Comment Period | Department of Energy  

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

74: Notice of Extension of Comment Period 74: Notice of Extension of Comment Period EIS-0374: Notice of Extension of Comment Period Klondike III/Biglow Canyon Wind Integration Project This notice extends the close of comment for scoping from the previously published May 13, 2005 to January 5, 2006. Bonneville Power Administration (BPA) is preparing its Klondike III/Biglow Canyon Wind Integration EIS under the National Environmental Policy Act (NEPA). BPA is currently considering a proposed interconnection requested by PPM Energy, Inc. (PPM), to integrate electrical power from their proposed Klondike III Wind Project into the Federal Columbia River Transmission System (FCRTS). Bonneville Power Administration Klondike III/Biglow Canyon Wind Integration Project Notice of Comment Period, DOE/EIS-0374 (December 2005 - 70 FR

362

EIS-0388: Extension of Scoping Period for the Notice of Intent to Prepare  

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

8: Extension of Scoping Period for the Notice of Intent to 8: Extension of Scoping Period for the Notice of Intent to Prepare an Environmental Impact Statement EIS-0388: Extension of Scoping Period for the Notice of Intent to Prepare an Environmental Impact Statement Operation of a Biosafety Level 3 Facility at Los Alamos National Laboratory, Los Alamos, New Mexico National Nuclear Security Administration Extension of Scoping Period for the Notice of Intent to Prepare an Environmental Impact Statement for the Operation of a Biosafety Level 3 Facility at Los Alamos National Laboratory, Los Alamos, New Mexico, DOE/EA-0388 (December 2005) 70 FR 77379 More Documents & Publications EIS-0388: Notice of Intent to Prepare an Environmental Impact Statement EIS-0380: Notice of Intent to Prepare a Supplemental Environmental Impact

363

Rate of DNA replication in the DNA synthetic period of the barley chromosomes  

Science Journals Connector (OSTI)

The rate of DNA replication, as judged by H3-thymidine incorporation, at the specific time of the S-period in chromosomes of barley (Hakata No. 2) is studied by means of autoradiography.

Akio Kusanagi

364

An ubiquitous ~62 Myr periodic fluctuation superimposed on general trends in fossil biodiversity: Part I, Documentation  

E-Print Network [OSTI]

We use Fourier Analysis and related techniques to investigate the question of periodicities in fossil biodiversity. These techniques are able to identify cycles superimposed on the long-term trends of the Phanerozoic. We review prior results and analyze data previously reduced and published. Joint time series analysis of various reductions of the Sepkoski Data, Paleobiology Database, and Fossil Record 2 indicate the same periodicity in biodiversity of marine animals at 62 Myr. We have not found this periodicity in the terrestrial fossil record. We have found that the signal strength decreases with time because of the accumulation of apparently "resistant" long-lived genera. The existence of a 62 Myr periodicity despite very different treatment of systematic error, particularly sampling-strength biases, in all three major databases strongly argues for its reality in the fossil record.

Melott, Adrian L

2010-01-01T23:59:59.000Z

365

Considering the Case for Biodiversity Cycles: Reexamining the Evidence for Periodicity in the Fossil Record  

E-Print Network [OSTI]

Medvedev and Melott (2007) have suggested that periodicity in fossil biodiversity may be induced by cosmic rays which vary as the Solar System oscillates normal to the galactic disk. We re-examine the evidence for a 62 million year (Myr) periodicity in biodiversity throughout the Phanerozoic history of animal life reported by Rohde & Mueller (2005), as well as related questions of periodicity in origination and extinction. We find that the signal is robust against variations in methods of analysis, and is based on fluctuations in the Paleozoic and a substantial part of the Mesozoic. Examination of origination and extinction is somewhat ambiguous, with results depending upon procedure. Origination and extinction intensity as defined by RM may be affected by an artifact at 27 Myr in the duration of stratigraphic intervals. Nevertheless, when a procedure free of this artifact is implemented, the 27 Myr periodicity appears in origination, suggesting that the artifact may ultimately be based on a signal in the...

Lieberman, Bruce S

2007-01-01T23:59:59.000Z

366

Einstein@Home search for periodic gravitational waves in LIGO S4 data  

E-Print Network [OSTI]

A search for periodic gravitational waves, from sources such as isolated rapidly spinning neutron stars, was carried out using 510 h of data from the fourth LIGO science run (S4). The search was for quasimonochromatic waves ...

Zucker, Michael E.

367

QUASI-PERIODIC WIGGLES OF MICROWAVE ZEBRA STRUCTURES IN A SOLAR FLARE  

SciTech Connect (OSTI)

Quasi-periodic wiggles of microwave zebra pattern (ZP) structures with periods ranging from about 0.5 s to 1.5 s are found in an X-class solar flare on 2006 December 13 at the 2.6-3.8 GHz with the Chinese Solar Broadband Radio Spectrometer (SBRS/Huairou). Periodogram and correlation analysis show that the wiggles have two to three significant periodicities and are almost in phase between stripes at different frequencies. The Alfvén speed estimated from the ZP structures is about 700 km s{sup –1}. We find the spatial size of the wave-guiding plasma structure to be about 1 Mm with a detected period of about 1 s. This suggests that the ZP wiggles can be associated with the fast magnetoacoustic oscillations in the flaring active region. The lack of a significant phase shift between wiggles of different stripes suggests that the ZP wiggles are caused by a standing sausage oscillation.

Yu, Sijie; Tan, Baolin; Yan, Yihua [Key Laboratory of Solar Activity, National Astronomical Observatories Chinese Academy of Sciences, Beijing 100012 (China); Nakariakov, V. M.; Selzer, L. A., E-mail: sjyu@nao.cas.cn [Centre for Fusion, Space and Astrophysics, Physics Department, University of Warwick, Coventry CV4 7AL (United Kingdom)

2013-11-10T23:59:59.000Z

368

E-Print Network 3.0 - abstracts search period Sample Search Results  

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

the period you wish to search. 12;2 PsycINFO user guide September 2002 Enter your search term or terms... PsycINFO user guide citations summaries abstracts journal...

369

Disorder-Driven Roughening Transition of Flux Lines in a Periodic Potential  

Science Journals Connector (OSTI)

In flux line systems, the competition between pinning by point disorder and attraction to a periodic potential is studied using exact ground state computations. For sufficiently small point disorder the flux l...

T. Knetter; G. Schröder; H. Rieger

2001-01-01T23:59:59.000Z

370

Einstein@Home search for periodic gravitational waves in early S5 LIGO data  

E-Print Network [OSTI]

This paper reports on an all-sky search for periodic gravitational waves from sources such as deformed isolated rapidly spinning neutron stars. The analysis uses 840 hours of data from 66 days of the fifth LIGO science run ...

Barsotti, Lisa

371

E-Print Network 3.0 - afterwreck postemergency period Sample...  

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

Ally 60 DF Apply one application in a 22 month period. Crop rotations: corn 22 months, cotton 22 months... . Sorghum 10 months, other crops 34 months. Recommended to be applied...

372

DOE Extends Public Comment Period for the Draft Uranium Leasing Program Programmatic Environmental Impact Statement  

Broader source: Energy.gov [DOE]

The U.S. Department of Energy (DOE) today announced that the public comment period for the Draft Uranium Leasing Program Programmatic Environmental Impact Statement (ULP PEIS) has been extended to May 31, 2013.

373

Case Study of Optimal Byproduct Gas Distribution in Integrated Steel Mill Using Multi-Period Optimization  

E-Print Network [OSTI]

? ? ? Case Study of Optimal Byproduct Gas Distribution in Integrated Steel Mill Using Multi-Period Optimization KIMMO M?KINEN BUSINESS MANAGER TONI KYM?L?INEN PRODUCT MANAGER JAAKKO JUNTTILA SALES MANAGER ABB OY HELSINKI FINLAND...

Makinen, K.; Kymalainen, T.; Junttila, J.

2012-01-01T23:59:59.000Z

374

Mathematical model of optimal control of a process of periodic verification of measurement devices  

Science Journals Connector (OSTI)

A synthesis of mathematical machinery is presented which allows us to solve the problem of optimizing the extent and periodicity of verification taking into account the parameters of a ... random process of varia...

F. I. Khrapov

1998-07-01T23:59:59.000Z

375

Long-Term Cycles in the History of Life: Periodic Biodiversity in the Paleobiology Database  

E-Print Network [OSTI]

Time series analysis of fossil biodiversity of marine invertebrates in the Paleobiology Database (PBDB) shows a significant periodicity at approximately 63 My, in agreement with previous analyses based on the Sepkoski database. I discuss how...

Melott, Adrian L.

2008-12-24T23:59:59.000Z

376

Transmission of energy down periodically ribbed elastic structures under fluid loading: spatialperiodicity in the pass bands  

Science Journals Connector (OSTI)

...long-range coupling|Green's function| Transmission of energy down periodically...long-range coupling; Green's function 1. Introduction Energy transmission down...fluid loading in energy transmission...properties of the Green's function...

1998-01-01T23:59:59.000Z

377

CO2 Abatement in the UK Power Sector: Evidence from the EU ETS Trial Period  

E-Print Network [OSTI]

This paper provides an empirical assessment of CO2 emissions abatement in the UK power sector during the trial period of the EU ETS. Using an econometrically estimated model of fuel switching, it separates the impacts of ...

Ellerman, A. Denny

2008-01-01T23:59:59.000Z

378

DOE Extends Comment Period on Notice of Inquiry Under the Energy...  

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

- 10:17am Addthis Today, in response to a formal request, General Counsel Scott Blake Harris approved a second and final extension of the public comment period to November 30,...

379

DOE Extends Comment Period on Notice of Inquiry Under the Energy...  

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

- 4:33pm Addthis Today, in response to a formal request, General Counsel Scott Blake Harris approved a 30-day extension of the public comment period on DOE's Notice of Inquiry...

380

Homogenization approach for the transmission eigenvalue problem for periodic media and application to the inverse problem  

E-Print Network [OSTI]

We consider the interior transmission problem associated with the scattering by an inhomogeneous (possibly anisotropic) highly oscillating periodic media. We show that, under appropriate assumptions, the solution of the interior transmission problem converges to the solution of a homogenized problem as the period goes to zero. Furthermore, we prove that the associated real transmission eigenvalues converge to transmission eigenvalues of the homogenized problem. Finally we show how to use the first transmission eigenvalue of the period media, which is measurable from the scattering data, to obtain information about constant effective material properties of the periodic media. The convergence results presented here are not optimal. Such results with rate of convergence involve the analysis of the boundary correction and will be subject of a forthcoming paper.

Fioralba Cakoni; Houssem Haddar; Isaac Harris

2014-10-14T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Regular domain structure in a lithium niobate crystal—Period stabilization  

Science Journals Connector (OSTI)

High stability of the period and homogeneity of a regular domain structure was attained in Nd: Mg: LiNbO3 crystals grown from melt with an excess of lithium oxide by the Czochralski method along the... ...

I. I. Naumova; N. F. Evlanova; S. A. Blokhin; T. O. Chaplina…

2003-07-01T23:59:59.000Z

382

Linear Multistep Methods with Reduced Truncation Error for Periodic Initial-value Problems  

Science Journals Connector (OSTI)

......PERIODIC INITIAL-VALUE PROBLEMS 481 example. Stiefel & Bettis (1969), Bettis (1970) and Lyche (1972) constructed schemes by...suggestions which improved the paper. REFERENCES BETTIS, D. G. 1970 Numerical integration of products of......

P. J. van der HOUWEN; B. P. SOMMEIJER

1984-10-01T23:59:59.000Z

383

Periodic variability in cetacean strandings: links to large-scale climate events  

Science Journals Connector (OSTI)

...and meridional (southerly) winds, reflecting general long-term...persistent zonal and meridional winds result in colder and presumably...School of Zoology, Antarctic Wildlife Research Unit, University of...Periodicity Tasmania Victoria Wind

2005-01-01T23:59:59.000Z

384

Measuring well hydraulic connectivity in fractured bedrock using periodic slug tests  

Science Journals Connector (OSTI)

Summary Periodic hydraulic experiments were conducted in a five-spot well cluster completed in a single bedding plane fracture. Tests were performed by using a winch-operated slug (submerged solid cylinder) to create a periodic head disturbance in one well and observing the phase shift and attenuation of the head response in the remaining wells. Transmissivity (T) and storativity (S) were inverted independently from head response. Inverted T decreased and S increased with oscillation period. Estimated S was more variable among well pairs than T, suggesting S may be a better estimator of hydraulic connectivity among closely spaced wells. These estimates highlighted a zone of poor hydraulic connection that was not identified by a constant rate test conducted in the same wells. Periodic slug tests appear to be a practical and effective technique for establishing local scale spatial variability in hydraulic parameters.

Eric Guiltinan; Matthew W. Becker

2015-01-01T23:59:59.000Z

385

A FAST DIRECT SOLVER FOR QUASI-PERIODIC SCATTERING A. GILLMAN, A. BARNETT  

E-Print Network [OSTI]

A FAST DIRECT SOLVER FOR QUASI-PERIODIC SCATTERING PROBLEMS A. GILLMAN, A. BARNETT Abstract. We-of-plane electric field [5]). We seek the scattered wave u which 1 #12;2 A. GILLMAN, A. BARNETT solves, ( + 2 )u

Barnett, Alex

386

Quarterly RCRA Groundwater Monitoring Data for the Period July through September 2006  

SciTech Connect (OSTI)

This report provides information about RCRA groundwater monitoring for the period July through September 2006. Eighteen Resource Conservation and Recovery Act (RCRA) sites were sampled during the reporting quarter.

Hartman, Mary J.

2007-02-01T23:59:59.000Z

387

Quasi-16-day periodic meridional movement of the equatorial ionization anomaly  

E-Print Network [OSTI]

Based on the daytime location of the equatorial ionization anomaly (EIA) crest derived from GPS observations at low latitude over China during the 2005–2006 stratospheric sudden warming (SSW), a quasi-16-day periodic ...

Mo, X. H.

388

Search for periodicities in the B8 solar neutrino flux measured by the Sudbury Neutrino Observatory  

Science Journals Connector (OSTI)

A search has been made for sinusoidal periodic variations in the B8 solar neutrino flux using data collected by the Sudbury Neutrino Observatory over a 4-year time interval. The variation at a period of 1 yr is consistent with modulation of the B8 neutrino flux by the Earth’s orbital eccentricity. No significant sinusoidal periodicities are found with periods between 1 d and 10 years with either an unbinned maximum likelihood analysis or a Lomb-Scargle periodogram analysis. The data are inconsistent with the hypothesis that the results of the recent analysis by Sturrock et al., based on elastic scattering events in Super-Kamiokande, can be attributed to a 7% sinusoidal modulation of the total B8 neutrino flux.

B. Aharmim et al. (SNO Collaboration)

2005-09-30T23:59:59.000Z

389

EIS-0466: Re-opening of Public Scoping Period and Announcement of  

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

Re-opening of Public Scoping Period and Announcement of Re-opening of Public Scoping Period and Announcement of Additional Public Scoping Meetings EIS-0466: Re-opening of Public Scoping Period and Announcement of Additional Public Scoping Meetings Continued Operation of the Sandia National Laboratories, New Mexico Comment Period Ends: 9/12/2011 Submit Comments to: Ms. Jeanette Norte NNSA Sandia Site Office P.O. Box 5400 Albuquerque, NM 87185-5400 Telephone: 505-845-4808 Toll-free: 1-855-766-4651 Fax: 505-284-7197 Electronic mail: sandia.sweis@doeal.gov On June 24, 2011, the National Nuclear Security Administration (NNSA), a semiautonomous agency within the U.S. Department of Energy (DOE), published a Notice of Intent (NOI) for the preparation of a Site-Wide Environmental Impact Statement (SWEIS) for the Sandia National Laboratories, New Mexico

390

Quantized Spiral Tip Motion in Excitable Systems with Periodic Heterogeneities Brent T. Ginn and Oliver Steinbock*  

E-Print Network [OSTI]

and frequencies that exhibit a devil's staircase. The plateaus of the staircase correspond to pinned or complex length. These quantized orbits follow a devil's staircase [10] as the refractory period of the sys- tem

Steinbock, Oliver

391

Ultrasonic wave propagation through a layer of spherical inclusions with random of periodic arrangements  

E-Print Network [OSTI]

ULTRASONIC %'AVE PROPAGATION THROUGH A LAYER OF SPHERICAL INCLUSIONS %ITH RANDOM OR PERIODIC ARRANGEMENTS A Thesis by NATHAN ALLAN DAY Submitted to the Office of Graduate Studies of Texas AEcM University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1994 Major Subject: Aerospace Engineering ULTRASONIC WAVE PROPAGATION THROUGH A LAYER OF SPHERICAL INCLUSIONS WITH RANDOM OR PERIODIC ARRANGEMENTS A Thesis by NATHAN ALLAN DAY Submitted...

Day, Nathan Allan

2012-06-07T23:59:59.000Z

392

Spatial Periodic Forcing Can Displace Patterns It Is Intended to Control  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Spatial periodic forcing of pattern-forming systems is an important, but lightly studied, method of controlling patterns. It can be used to control the amplitude and wave number of one-dimensional periodic patterns, to stabilize unstable patterns, and to induce them below instability onset. We show that, although in one spatial dimension the forcing acts to reinforce the patterns, in two dimensions it acts to destabilize or displace them by inducing two-dimensional rectangular and oblique patterns.

Mau, Yair; Hagberg, Aric; Meron, Ehud

2012-07-01T23:59:59.000Z

393

Short period fluctuations of sea level in the West Florida Keys  

E-Print Network [OSTI]

of Sea Level in the West Florida Keys (December, 1978) Sangem Hsu, B. S. , Taiwan Provincial College of Marine and Oceanic Technology. Chairman of Advisory Committee: Dr. Takashi Ichiye In addition to oscillations of astronomical origin, tidal... records often contain shorter or longer period oscillations. Short period oscillations usually have very small amplitudes and often cannot be recognized in the tidal records except near crests or troughs at days of calm weather. The purposes...

Hsu, Sangem

1978-01-01T23:59:59.000Z

394

Two-Phase Reaction Turbine. Technical progress report for the period July-December 1999  

SciTech Connect (OSTI)

During the initial part of this period the concentrated effort was placed on getting comprehensive analysis and design of the turbine prototype. This was in order to be able to initiate its fabrication as needed for its building, assembling and timely testing. In the second part of this period the effort was placed on design and other considerations needed to acquire the test rig within the limited budget based on subsequent grant from the DOE.

NONE

1999-12-31T23:59:59.000Z

395

3D periodic dielectric composite homogenization based on the Generalized Source Method  

E-Print Network [OSTI]

The article encloses a new Fourier space method for rigorous optical simulation of 3D periodic dielectric structures. The method relies upon rigorous solution of Maxwell's equations in complex composite structures by the Generalized Source Method. Extremely fast GPU enabled calculations provide a possibility for an efficient search of eigenmodes in 3D periodic complex structures on the basis of rigorously obtained resonant electromagnetic response. The method is applied to the homogenization problem demonstrating a complete anisotropic dielectric tensor retrieval.

Shcherbakov, Alexey A

2015-01-01T23:59:59.000Z

396

Comparison of quantization of charge transport in periodic and open pumps  

E-Print Network [OSTI]

We compare the charges transported in two systems, a spatially periodic and an open quantum pump, both depending periodically and adiabatically on time. The charge transported in a cycle was computed by Thouless, respectively by Buttiker et al. in the two cases. We show that the results agree in the limit where the two physical situations become the same, i.e., that of a large open pump.

Gian Michele Graf; Gregorio Ortelli

2007-09-19T23:59:59.000Z

397

Considering the Case for Biodiversity Cycles: Reexamining the Evidence for Periodicity in the Fossil Record  

E-Print Network [OSTI]

Medvedev and Melott (2007) have suggested that periodicity in fossil biodiversity may be induced by cosmic rays which vary as the Solar System oscillates normal to the galactic disk. We re-examine the evidence for a 62 million year (Myr) periodicity in biodiversity throughout the Phanerozoic history of animal life reported by Rohde & Mueller (2005), as well as related questions of periodicity in origination and extinction. We find that the signal is robust against variations in methods of analysis, and is based on fluctuations in the Paleozoic and a substantial part of the Mesozoic. Examination of origination and extinction is somewhat ambiguous, with results depending upon procedure. Origination and extinction intensity as defined by RM may be affected by an artifact at 27 Myr in the duration of stratigraphic intervals. Nevertheless, when a procedure free of this artifact is implemented, the 27 Myr periodicity appears in origination, suggesting that the artifact may ultimately be based on a signal in the data. A 62 Myr feature appears in extinction, when this same procedure is used. We conclude that evidence for a periodicity at 62 Myr is robust, and evidence for periodicity at approximately 27 Myr is also present, albeit more ambiguous.

Bruce S. Lieberman; Adrian L. Melott

2007-08-22T23:59:59.000Z

398

A detached double degenerate with a 1.4 hr orbital period  

E-Print Network [OSTI]

We have discovered that the detached double degenerate binary WD 0957-666 has an orbital period of 1.46 hours, rather than the 1.15 day orbital period reported earlier. This is the shortest period example of such a system yet discovered. We obtain a unique period, which fits both our and earlier data. At this period the emission of gravitational radiation will cause the binary to merge within approximately 2.0 x 10*8 years. This system represents a population of short orbital period binaries which will merge within a Hubble time, and so could account for type Ia supernovae, although due to the low mass of both stars (0.3 to 0.4 solar masses), it is unlikely to become a supernova itself. We have detected the companion star and have measured a mass ratio of q = 1.15. This is the third double degenerate for which q has been measured and all three have q close to 1, which is in conflict with the predicted mass ratio distribution which peaks at 0.7. This system is viewed close to edge on, and we estimate that the probability of this system undergoing eclipses is 15 %.

C. Moran; T. R. Marsh; A. Bragaglia

1997-04-24T23:59:59.000Z

399

Silicon nanoparticle synthesis by short-period thermal anneals at atmospheric pressure in argon  

SciTech Connect (OSTI)

Silicon nanoparticles have been studied for a wide variety of applications including nanoelectronic, photovoltaic, and optoelectronic devices. In this work, silicon nanoparticles were synthesized by short-period annealing of silicon-on-insulator substrates to temperatures ranging between 600 and 900 deg. C in argon gas at atmospheric pressure. Two different top silicon layers were deposited by ion-beam sputtering onto oxidized substrates. The thinner 6 nm top layer samples were annealed to temperatures for 30 s periods while thicker 15 nm top layer samples were annealed for 60 s periods. For both sets of samples, nanoparticles were observed to form at all the anneal temperatures through imaging by AFM. One long-period UHV anneal study, with 30-min anneal times, observed nanoparticle formation at temperatures similar to the current work while another similar long-period UHV anneal reported nanoparticle formation only above well-defined formation temperatures that depended upon the starting top layer thickness. In the current work, the average nanoparticle radius was found to increase both with the final anneal temperature and anneal period. For the highest anneal temperatures of the 6 nm top layer samples, a changing surface topography indicated that the thinner Si source layer was becoming depleted and the nanoparticle formation process was nearing completion. No such changes were observed for the thicker 15 nm samples at the same temperatures.

Spencer, Gregory; Anyamesem-Mensah, Benedict; Galloway, Heather C.; Bandyopadhyay, Anup; Frasier, Daniel [Department of Physics, Texas State University-San Marcos, San Marcos, Texas 78666 (United States); Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76207 (United States); Department of Physics, Texas State University-San Marcos, San Marcos, Texas 78666 (United States)

2011-09-15T23:59:59.000Z

400

Microsoft Word - ls311.doc  

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

Achievable Magnetic Fields of Super-Ferric Helical Undulators Achievable Magnetic Fields of Super-Ferric Helical Undulators for the ILC S.H. Kim Advanced Photon Source, Argonne National Laboratory Abstract - The magnetic fields on the beam axis of helical undulators for the proposed International Linear Collider (ILC) gamma-ray production were calculated for undulator periods of 10 mm and 12 mm. The calculation assumed the use of low-carbon steel for the magnetic poles and a beam chamber outer diameter of 6.3 mm. Using NbTi superconducting coils at 4.2 K, the on-axis field for a 10-mm-period undulator was 0.62 T at the critical current density. The field for a 12-mm undulator period was 0.95 T, which gives a K value of 1.06. The K value for an 11-mm undulator with Nb 3 Sn superconducting coils was estimated to about 1.1.

Note: This page contains sample records for the topic "5-cm period undulator" 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

Development of Advanced Concept for Shortening Construction Period of ABWR Plant  

SciTech Connect (OSTI)

Construction of a nuclear power plant (NPP) requires a very long period because of large amount of construction materials and many issues for negotiation among multiple sections. Shortening the construction period advances the date of return on an investment, and can also result in reduced construction cost. Therefore, the study of this subject has a very high priority for utilities. We achieved a construction period of 37 months from the first concrete work to fuel loading (F/L) (51.5 months from the inspection of the foundation (I/F) to the start of commercial operation (C/O)) at the Kashiwazaki-Kariwa NPPs No. 6 and 7 (KK-6/7), which are the first ABWR plants in the world. At TEPCO's next plant, we think that a construction period of less than 36 months (45 months from I/F to C/O) can be realized based on conventional methods such as early start of equipment installation and blocking of equipment to be brought in advance. Furthermore, we are studying the feasibility of a 21.5-month construction period (30 months from I/F to C/O) with advanced ideas and methods. The important concepts for a 21.5-month construction period are adoption of a new building structure that is the steel plate reinforced concrete (SC) structure and promotion of extensive modularization of equipment and building structure. With introducing these new concepts, we are planning the master schedule (M/S) and finding solutions to conflicts in the schedule of area release from building construction work to equipment installation work (schedule-conflicts.) In this report, we present the shortest construction period and an effective method to put it into practice for the conventional general arrangement (GA) of ABWR. In the future, we will continue the study on the improvement of building configuration and arrangements, and make clear of the concept for large composite modules of building structures and equipment. (authors)

Hiroshi Ijichi; Toshio Yamashita; Masahiro Tsutagawa; Hiroya Mori [Toshiba Corporation (Japan); Nobuaki Ooshima; Jun Miura [Hitachi Ltd. (Japan); Minoru Kanechika [Kajima Corporation (Japan); Nobuaki Miura [Shimizu Corporation (Japan)

2002-07-01T23:59:59.000Z

402

EVOLUTIONARY TRACKS OF TRAPPED, ACCRETING PROTOPLANETS: THE ORIGIN OF THE OBSERVED MASS-PERIOD RELATION  

SciTech Connect (OSTI)

The large number of observed exoplanets ({approx}>700) provides important constraints on their origin as deduced from the mass-period diagram of planets. The most surprising features in the diagram are (1) the (apparent) pileup of gas giants at a period of {approx}500 days ({approx}1 AU) and (2) the so-called mass-period relation, which indicates that planetary mass is an increasing function of orbital period. We construct the evolutionary tracks of growing planets at planet traps in evolving protoplanetary disks and show that they provide a good physical understanding of how these observational properties arise. The fundamental feature of our model is that inhomogeneities in protoplanetary disks give rise to multiple (up to 3) trapping sites for rapid (type I) planetary migration of planetary cores. The viscous evolution of disks results in the slow radial movement of the traps and their cores from large to small orbital periods. In our model, the slow inward motion of planet traps is coupled with the standard core accretion scenario for planetary growth. As planets grow, type II migration takes over. Planet growth and radial movement are ultimately stalled by the dispersal of gas disks via photoevaporation. Our model makes a number of important predictions: that distinct sub-populations of planets that reflect the properties of planet traps where they have grown result in the mass-period relation, that the presence of these sub-populations naturally explains a pileup of planets at {approx}1 AU, and that evolutionary tracks from the ice line do put planets at short periods and fill an earlier claimed {sup p}lanet desert{sup -}a sparse population of planets in the mass-semimajor axis diagram.

Hasegawa, Yasuhiro [Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1 (Canada); Pudritz, Ralph E., E-mail: hasegay@physics.mcmaster.ca, E-mail: pudritz@physics.mcmaster.ca [Origins Institute, McMaster University, Hamilton, ON L8S 4M1 (Canada)

2012-12-01T23:59:59.000Z

403

The periodic variations of a white-light flare observed with ULTRACAM  

E-Print Network [OSTI]

High time resolution observations of a white--light flare on the active star EQ PegB show evidence of intensity variations with a period of approximately 10 s. The period drifts to longer values during the decay phase of the flare. If the oscillation is interpreted as an impulsively--excited, standing--acoustic wave in a flare loop, the period implies a loop length of 1.7 Mm and 3.4 Mm for the case of the fundamental mode and the second harmonic, respectively. However, the small loop lengths imply a very high modulation depth making the acoustic interpretation unlikely. A more realistic interpretation may be that of a fast--MHD wave, with the modulation of the emission being due to the magnetic field. Alternatively, the variations could be due to a series of reconnection events. The periodic signature may then arise as a result of the lateral separation of individual flare loops or current sheets with oscillatory dynamics (i.e. periodic reconnection).

M. Mathioudakis; D. S. Bloomfield; D. B. Jess; V. S. Dhillon; T. R. Marsh

2006-05-08T23:59:59.000Z

404

Long-term cycles in the history of life: Periodic biodiversity in the Paleobiology Database  

E-Print Network [OSTI]

Time series analysis of fossil biodiversity of marine invertebrates in the Paleobiology Database (PBDB) shows a significant periodicity at approximately 63 My, in agreement with previous analyses based on the Sepkoski database. I discuss how this result did not appear in a previous analysis of the PBDB. The existence of the 63 My periodicity, despite very different treatment of systematic error in both PBDB and Sepkoski databases strongly argues for consideration of its reality in the fossil record. Cross-spectral analysis of the two datasets finds that a 62 My periodicity coincides in phase by 1.6 My, equivalent to better than the errors in either measurement. Consequently, the two data sets not only contain the same strong periodicity, but its peaks and valleys closely correspond in time. Two other spectral peaks appear in the PBDB analysis, but appear to be artifacts associated with detrending and with the increased interval length. Sampling-standardization procedures implemented by the PBDB collaboration suggest that the signal is not an artifact of sampling bias. Further work should focus on finding the cause of the 62 My periodicity.

Adrian L. Melott

2008-12-24T23:59:59.000Z

405

Considering the Case for Biodiversity Cycles: Re-Examining the Evidence for Periodicity in the Fossil Record  

E-Print Network [OSTI]

We re-examine the evidence for a 62 million year (Myr) periodicity in biodiversity throughout the Phanerozoic history of animal life reported by [1], as well as related questions of periodicity in origination and extinction. ...

Lieberman, Bruce S.; Melott, Adrian L.

2007-04-01T23:59:59.000Z

406

DOE Extends Public Comment Period for the Draft Uranium Leasing Program  

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

the Draft Uranium Leasing the Draft Uranium Leasing Program Programmatic Environmental Impact Statement DOE Extends Public Comment Period for the Draft Uranium Leasing Program Programmatic Environmental Impact Statement June 3, 2013 - 3:05pm Addthis Contractor, Bob Darr, S.M. Stoller Corporation Public Affairs, (720) 377-9672, ULinfo@lm.doe.gov May 29, 2013 DOE Extends Public Comment Period for Uranium Program Environmental Impact Statement The U.S. Department of Energy (DOE) today announced that the public comment period for the Draft Uranium Leasing Program Programmatic Environmental Impact Statement (ULP PEIS) has been extended to July 1, 2013. Under the Uranium Leasing Program, DOE's Office of Legacy Management manages 31 tracts of land in Mesa, Montrose, and San Miguel counties in

407

S&TR | April 2007: A New Block on the Periodic Table  

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

Article title: A New Block on the Periodic Table; photo of Dawn Shaughnessy. Livermore chemist Dawn Shaughnessy adds the most recently created element to the periodic table. SCIENTISTS from Lawrence Livermore working in collaboration with a team from the Joint Institute for Nuclear Research (JINR) in Dubna, Russia, have discovered element 118, the newest block on the periodic table. Lasting less than a millisecond before decaying and ultimately fissioning, element 118 is the latest element to be synthesized artificially. Why do scientists work so hard to create new elements that last for such a short time? According to chemist Dawn Shaughnessy from Livermore's Chemistry, Materials, and Life Sciences Directorate, "Each new element we discover provides more knowledge about the forces that bind nuclei and what

408

EIS-0472: Notice of Public Scoping Meetings and Extension of Scoping Period  

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

472: Notice of Public Scoping Meetings and Extension of 472: Notice of Public Scoping Meetings and Extension of Scoping Period EIS-0472: Notice of Public Scoping Meetings and Extension of Scoping Period Uranium Leasing Program Programmatic Environmental Impact Statement Comment Period Ends: 09/09/11 Submit Comments to: Laura Kilpatrick, Esq. DOE ULP Program Manager Office of Legacy Management U.S. Department of Energy 11025 Dover Street, Suite 1000 Westminster, CO 80021 Electronic comments: http://ulpeis.anl.gov Electronic mail: ulpeis@anl.gov DOE will host public scoping meetings in western Colorado to receive comments on the scope of the DOE Uranium Leasing Program (ULP) Programmatic Environmental Impact Statement (hereinafter referred to as the ULP PEIS). The PEIS will analyze the reasonably foreseeable environmental impacts,

409

EIS-0183: Notice of Extension of Scoping Period | Department of Energy  

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

Extension of Scoping Period Extension of Scoping Period EIS-0183: Notice of Extension of Scoping Period Administration-Construction, Operation, and Maintenance of the Proposed Transmission Agency of Northern California Transmission Project, California On February 23, 2009, Western Area Power Administration (Western), an agency of the Department of Energy (DOE), announced the Notice of Intent to prepare an Environmental Impact Statement/Environmental Impact Report (EIS/EIR) for the construction, operation, and maintenance of the proposed Transmission Agency of Northern California (TANC) Transmission Project. In that notice, Western described the schedule for scoping meetings and advised the public that comments on the scope of the EIS/EIR were due by April 30, 2009. DOE/EIS-0183, Western Area Power Administration-Construction, Operation,

410

EIS-0183: Notice of Extension of Scoping Period | Department of Energy  

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

Notice of Extension of Scoping Period Notice of Extension of Scoping Period EIS-0183: Notice of Extension of Scoping Period Administration-Construction, Operation, and Maintenance of the Proposed Transmission Agency of Northern California Transmission Project, California On February 23, 2009, Western Area Power Administration (Western), an agency of the Department of Energy (DOE), announced the Notice of Intent to prepare an Environmental Impact Statement/Environmental Impact Report (EIS/EIR) for the construction, operation, and maintenance of the proposed Transmission Agency of Northern California (TANC) Transmission Project. In that notice, Western described the schedule for scoping meetings and advised the public that comments on the scope of the EIS/EIR were due by April 30, 2009. DOE/EIS-0183, Western Area Power Administration-Construction, Operation,

411

EIS-0283-S2: Notice of Extension of Public Review and Comment Period and  

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

Notice of Extension of Public Review and Comment Notice of Extension of Public Review and Comment Period and Announcement of an Additional Public Hearing EIS-0283-S2: Notice of Extension of Public Review and Comment Period and Announcement of an Additional Public Hearing Draft Surplus Plutonium Disposition Supplemental Environmental Impact Statement DOE has extended the comment period for the Surplus Plutonium Disposition Supplemential EIS through October 10 and announces an additional Public Hearing in Espanola, NM. EIS-0283-S2-CommentExtension-2012.pdf More Documents & Publications EIS-0312: Notice of Availability of the Bonneville Power Administration Administrator's Record of Decision UDAC Meeting - January 2012 Electricity Advisory Committee Notice of Open Meeting October 2 and 3, 2013: Federal Register Notice Volume 78, No. 176 - September 11, 2013

412

Ultrashort-period MS eclipsing systems. New observations and light curve solutions of six NSVS binaries  

E-Print Network [OSTI]

We carried out photometric and low-resolution spectral observations of six eclipsing ultrashort-period binaries with MS components. The light curve solutions of the Rozhen observations show that all targets are overcontact systems. We found well-defined empirical relation "period -- semi-major axis" for the short-period binaries and used it for estimation of the global parameters of the targets. Our results revealed that NSVS 925605 is quite interesting target: (a) it is one of a few contact binaries with M components; (b) it exhibits high activity (emission in H$\\alpha$ line, X-ray emission, large cool spots, non-Planck energy distribution); (c) its components differ in temperature by 700 K. All appearances of high magnetic activity and huge fillout factor (0.7) of NSVS 925605 might be assumed as a precursor of the predicted merging of close magnetic binaries. Another unusual binary is NSVS 2700153 which reveals considerable long-term variability.

Dimitrov, Dinko

2015-01-01T23:59:59.000Z

413

LOW-FREQUENCY OBSERVATIONS OF TRANSIENT QUASI-PERIODIC RADIO EMISSION FROM THE SOLAR ATMOSPHERE  

SciTech Connect (OSTI)

We report low-frequency observations of quasi-periodic, circularly polarized, harmonic type III radio bursts whose associated sunspot active regions were located close to the solar limb. The measured periodicity of the bursts at 80 MHz was ?5.2 s, and their average degree of circular polarization (dcp) was ?0.12. We calculated the associated magnetic field B (1) using the empirical relationship between the dcp and B for the harmonic type III emission, and (2) from the observed quasi-periodicity of the bursts. Both the methods result in B ? 4.2 G at the location of the 80 MHz plasma level (radial distance r ? 1.3 R{sub ?}) in the active region corona.

Sasikumar Raja, K.; Ramesh, R., E-mail: sasikumar@iiap.res.in [Indian Institute of Astrophysics, II Block, Koramangala, Bangalore 560 034 (India)

2013-09-20T23:59:59.000Z

414

Mode propagation and absorption loss in metal-clad periodic optical waveguides  

SciTech Connect (OSTI)

In terms of the mode eigenvalue equations are field distributions, calculations are performed for Au/InGaAsP/InP, air/Au/InGaAsP/InP, and Au/DiO{sub 2}InGaAsP/InP periodic optical waveguides. On the basis of the computed results, the coupling property in the periodic structure is analyzed, the mode split and the mode band formation of both TE and TM guided modes are described, and the effects of the thickness of the metal cladding and the oxide buffer layer on mode propagation and absorption loss are discussed for TE and TM guided modes as well as for the TM surface-plasma mode. Furthermore, the conversion from the surface-plasma wave to the guided wave for the TM mode is explained for Au/SiO{sub 2}/InGaAsP/InP periodic structures. 27 refs., 8 figs.

Chunsheng Ma [Jilin Univ., Changchun (China)

1996-02-01T23:59:59.000Z

415

Resonance modes, cavity field enhancements, and long-range collective photonic effects in periodic bowtie nanostructures  

SciTech Connect (OSTI)

The discovery of single-molecule sensitivity via surfaceenhanced Raman scattering on resonantly excited noble metal nanoparticles has brought an increasing interest in its applications to the molecule detection and identification. Periodic gold bowtie nanostructures have recently been shown to give a large enhancement factor sufficient for single molecule detection. In this work, we simulate the plasmon resonance for periodic gold bowtie nanostructures. The difference between the dipole and the quadrupole resonances is described by examining the magnitude and phase of electric field, the bound surface charge, and the polarization. The gap size dependence of the field enhancement can be interpreted by considering cavity field enhancement. Also, additional enhancement is obtained through the long-range collective photonic effect when the bowtie array periodicity matches the resonance wavelength.

Hsueh, Chun-Hway [ORNL; Li, Jia-Han [National Taiwan Ocean University; Hatab, Nahla A. [Oak Ridge National Laboratory (ORNL); Gu, Baohua [ORNL

2011-01-01T23:59:59.000Z

416

Superhump periods in the UGSU-type dwarf nova SDSSp J082409.73+493124.4  

E-Print Network [OSTI]

We present observations and analysis of the first reported superoutburst of the dwarf nova SDSSp J082409.73+493124.4 during February/March 2007. From a maximum observed magnitude of 15.4C it declined at 0.09 mag/d for 7 days, flattened out around magnitude 16 for a further 5 days and then returned rapidly to quiescence at magnitude 19.4. The flattening of the light curve late in the outburst was not associated with a re-growth of superhumps. For the first 5 days we observed common superhumps with period 0.06954(5) d, thus confirming its classification as a UGSU-type dwarf nova. This was followed by a phase transition to late superhumps with period 0.06921(6) d. We found a small but persistent signal at 0.0687(6) d which we interpret as the orbital period.

David Boyd; Jeremy Shears; Robert Koff

2007-07-12T23:59:59.000Z

417

Complex modes and new amplification regimes in periodic multi transmission lines interacting with an electron beam  

E-Print Network [OSTI]

We show the existence of a new regime of operation for travelling wave tubes (TWTs) composed of slow-wave periodic structures that support two or more electromagnetic modes, with at least two synchronized with an electron beam. The interaction between the slow-wave structure and an electron beam is quantified using a multi transmission line approach (MTL) and transfer matrix analysis leading to the identification of modes with complex Bloch wavenumber. In particular, we report a new operation condition for TWTs based on an electron beam synchronous to two modes exhibiting a degeneracy condition near a band edge in a MTL slow-wave periodic structure. We show a phenomenological change in the band structure of periodic TWT where we observe at least two growing modal cooperating solutions as opposed to a uniform MTL interacting with an electron beam where there is strictly only one growing mode solution.

Othman, Mohamed; Capolino, Filippo

2014-01-01T23:59:59.000Z

418

EIS-0472: Notice of Public Scoping Meetings and Extension of Scoping Period  

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

2: Notice of Public Scoping Meetings and Extension of 2: Notice of Public Scoping Meetings and Extension of Scoping Period EIS-0472: Notice of Public Scoping Meetings and Extension of Scoping Period Uranium Leasing Program Programmatic Environmental Impact Statement Comment Period Ends: 09/09/11 Submit Comments to: Laura Kilpatrick, Esq. DOE ULP Program Manager Office of Legacy Management U.S. Department of Energy 11025 Dover Street, Suite 1000 Westminster, CO 80021 Electronic comments: http://ulpeis.anl.gov Electronic mail: ulpeis@anl.gov DOE will host public scoping meetings in western Colorado to receive comments on the scope of the DOE Uranium Leasing Program (ULP) Programmatic Environmental Impact Statement (hereinafter referred to as the ULP PEIS). The PEIS will analyze the reasonably foreseeable environmental impacts,

419

The U.S. Department of Energy is reopening the public scoping period for  

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

The U.S. Department of Energy is reopening the public scoping The U.S. Department of Energy is reopening the public scoping period for the Northern Pass Transmission Line Project Environmental Impact Statement (EIS). The U.S. Department of Energy is reopening the public scoping period for the Northern Pass Transmission Line Project Environmental Impact Statement (EIS). June 15, 2011 - 2:35pm Addthis The U.S. Department of Energy is reopening the public scoping period for the Northern Pass Transmission Line Project Environmental Impact Statement (EIS). Addthis Related Articles Amended Notice of Intent for the Northern Pass Transmission Line Project Published in the Federal Register Obama Officials Announce Steps to Promote the Clean Energy Potential of the West DOE Environmental Impact Statement Public Scoping Meeting on Champlain

420

Mon. Not. R. Astron. Soc. 000, 000--000 (1997) The magnetic field geometry and rotational period of the  

E-Print Network [OSTI]

of the solar abundance. Preston (1970) included this star in ``a list of Ap stars that may have long periods

Landstreet, John D.

Note: This page contains sample records for the topic "5-cm period undulator" 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

Energy Efficiency Program for Residential Products: Energy Conservation Standards for Residential Dishwashers, Reopening of the Comment Period  

Broader source: Energy.gov [DOE]

Energy Efficiency Program for Residential Products: Energy Conservation Standards for Residential Dishwashers, Reopening of the Comment Period

422

Neurogenic period of ascending tract neurons in the upper lumbar spinal cord of the rat  

SciTech Connect (OSTI)

Although the neurogenic period for neurons in the lumbar spinal cord has been clearly established (Days 12 through 16 of gestation), it is not known when the neurogenesis of ascending tract neurons is completed within this period. The purpose of the present study was to determine the duration of the neurogenic period for projection neurons of the ascending tracts. To label neurons undergoing mitosis during this period, tritiated thymidine was administered to fetal rats on Embryonic (E) Days E13 through E16 of gestation. Ascending tract neurons of the lumbar cord were later (Postnatal Days 40-50) labeled in each animal with a retrograde tracer, Fluoro-Gold, applied at the site of a hemisection at spinal cord segment C3. Ascending tract neurons which were undergoing mitosis in the upper lumbar cord were double labeled, i.e., labeled with both tritiated thymidine and Fluoro-Gold. On Day E13, 89-92% of the ascending tract neurons were double labeled; on Day E14, 35-37%; and on Day E15, 1-4%. Results showed, then, that some ascending tract neurons were double labeled through Day E15 and were, therefore, proliferating in the final one-third of the neurogenic period. Ascending tract neurons proliferating on Day E15 were confined to laminae III, IV, V, and X and the nucleus dorsalis. Long tract neurons in the superficial dorsal horn (laminae I and II), on the other hand, were found to have completed neurogenesis on Day E14 of gestation. Results of the present study show that spinal neurogenesis of ascending projection neurons continues throughout most of the neurogenic period and does not completely follow the well-established ventral to dorsal gradient.

Nandi, K.N.; Beal, J.A.; Knight, D.S. (Louisiana State Univ. Medical Center, Shreveport (USA))

1990-02-01T23:59:59.000Z

423

Getting More For Your Money: Identifying and Confirming Long-Period Planets with Kepler  

E-Print Network [OSTI]

Kepler will monitor enough stars that it is likely to detect single transits of planets with periods longer than the mission lifetime. We show that by combining the Kepler photometry of such transits with precise radial velocity (RV) observations taken over ~3 months, and assuming circular orbits, it is possible to estimate the periods of these transiting planets to better than 20% (for planets with radii greater than that of Neptune) and the masses to within a factor of 2 (for planet masses m_p > M_Jup). We also explore the effects of eccentricity on our estimates of these uncertainties.

Jennifer C. Yee; B. Scott Gaudi

2008-07-16T23:59:59.000Z

424

Diffusion-induced periodic transition between oscillatory modes in amplitude-modulated patterns  

SciTech Connect (OSTI)

We study amplitude-modulated waves, e.g., wave packets in one dimension, overtarget spirals and superspirals in two dimensions, under mixed-mode oscillatory conditions in a three-variable reaction-diffusion model. New transition zones, not seen in the homogeneous system, are found, in which periodic transitions occur between local 1{sup N?1} and 1{sup N} oscillations. Amplitude-modulated complex patterns result from periodic transition between (N???1)-armed and N-armed waves. Spatial recurrence rates provide a useful guide to the stability of these modulated patterns.

Tang, Xiaodong; He, Yuxiu; Wang, Shaorong; Gao, Qingyu, E-mail: gaoqy@cumt.edu.cn [College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008 (China)] [College of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008 (China); Epstein, Irving R., E-mail: epstein@brandeis.edu [Department of Chemistry and Volen Center for Complex Systems, MS 015, Brandeis University, Waltham, Massachusetts 02454-9110 (United States); Wang, Qun [School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116 (China)] [School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116 (China)

2014-06-15T23:59:59.000Z

425

Grain sorghum response to different flooding periods at the early boot stage  

E-Print Network [OSTI]

GRAIN SORGHUM RESPONSE TO DIFFERENT FLOODING PERIODS AT THE EARLY BOOT STAGE A Thesis by OSCAR ZOLEZZI DEL RIO Submitted to the Graduate College of Texas A)M University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1976 Major Subject: Agricultural Engineering GRAIN SORGHUM RESPONSE TO DIFFERENT FLOODING PERIODS AT THE EARLY BOOT STAGE A Thesis by OSCAR 2OLE22I DEL RIO Approved as to style and content by: airman o ommzttee Hea o Departme t e er...

Zolezzi del Rio, Oscar

2012-06-07T23:59:59.000Z

426

The quasi-periodic nature of wall slip for molten plastics in large amplitude oscillatory shear  

E-Print Network [OSTI]

THE QUASI-PERIODIC NATURE OF WALL SLIP FOR MOLTEN PLASTICS IN LARGE AMPLITUDE OSCILLATORY SHEAR A Thesis by DAVID WARREN ADRIAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE May 1992 Major Subject: Mechanical Engineering THE QUASI-PERIODIC NATURE OF WALL SLIP FOR MOLTEN PLASTICS IN LARGE AMPLITUDE OSCILLATORY SHEAR A Thesis by DAVID WARREN ADRIAN Approved as to style and content by: A. J...

Adrian, David Warren

2012-06-07T23:59:59.000Z

427

Calculation of electronic states of a two-dimensional electron gas in a periodic magnetic field  

E-Print Network [OSTI]

CALCULATION OF ELECTRONIC STATES OF A TWO-DIMENSIONAL ELECTRON GAS IN A PERIODIC MAGNETIC FIELD A Thesis ANISI. L HAOEE Submitted to the Office ol' Graduate Studies of Texas A&M I. , niversity in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE, May 1992 Major Subject: Electricaj Engineering CALCULATION OF ELECTRONIC STATES OF A TWO-DIMENSIONAL ELECTRON GAS IN A PERIODIC MAGNETIC FIEI D A Thesis by ANISIlL HAOLtE 8L~ M. H. Weichold (Chair of Oornmittee) D...

Haque, Anisul

2012-06-07T23:59:59.000Z

428

LONG-TIME SOLVABILITY OF THE NAVIER-STOKES-BOUSSINESQ EQUATIONS WITH ALMOST PERIODIC INITIAL LARGE DATA  

E-Print Network [OSTI]

LONG-TIME SOLVABILITY OF THE NAVIER-STOKES-BOUSSINESQ EQUATIONS WITH ALMOST PERIODIC INITIAL LARGE Sapporo 060-0810, Japan Keywords: Navier-Stokes equation, Boussinesq approximation, almost periodic of solutions of the Navier-Stokes-Boussinesq equations with spatially almost periodic large data when

Ibrahim, Slim

429

Multiple periodic solutions of an impulsive predator-prey model with Holling-type IV functional response  

Science Journals Connector (OSTI)

An impulsive periodic predator-prey model with Holling-type IV functional response is considered. Using the continuation theorem of coincidence degree theory, we present an easily verifiable sufficient condition on the existence of multiple periodic ... Keywords: Coincidence degree, Holling-type IV functional response, Impulse, Periodic solution, Predator-prey model

Qi Wang; Binxiang Dai; Yuming Chen

2009-05-01T23:59:59.000Z

430

Echelle diagrams and period spacings of g modes in gamma Doradus stars from four years of Kepler observations  

E-Print Network [OSTI]

We use photometry from the Kepler Mission to study oscillations in gamma Doradus stars. Some stars show remarkably clear sequences of g modes and we use period echelle diagrams to measure period spacings and identify rotationally split multiplets with l=1 and l=2. We find small deviations from regular period spacings that arise from the gradient in the chemical composition just outside the convective core. We also find stars for which the period spacing shows a strong linear trend as a function of period, consistent with relatively rapid rotation. Overall, the results indicate it will be possible to apply asteroseismology to a range of gamma Dor stars.

Bedding, Timothy R; Colman, Isabel L; Kurtz, Donald W

2014-01-01T23:59:59.000Z

431

Measurement of the orbital and superhump periods of the eclipsing cataclysmic variable SDSS J170213.26+322954.1  

E-Print Network [OSTI]

The orbital period of the eclipsing cataclysmic variable SDSS J170213.26+322954.1 has been measured as 0.10008215+/-0.00000001d using observations of eclipses during the first recorded superoutburst in October 2005 together with eclipses observed in quiescence in July 2003. This period puts the system in the centre of the period gap. Observation of superhumps during the October 2005 outburst with a period of 0.10496+/-0.00015d confirms this to be a UGSU-type system with a period excess of 4.9%.

David Boyd; Arto Oksanen; Arne Henden

2006-01-31T23:59:59.000Z

432

Property:Building/MeanAnnualTempCalculationPeriod | Open Energy Information  

Open Energy Info (EERE)

MeanAnnualTempCalculationPeriod MeanAnnualTempCalculationPeriod Jump to: navigation, search This is a property of type Number. Mean annual temperature during the calculation period Pages using the property "Building/MeanAnnualTempCalculationPeriod" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 7.6 + Sweden Building 05K0002 + 7.6 + Sweden Building 05K0003 + 7.142 + Sweden Building 05K0004 + 7.6 + Sweden Building 05K0005 + 7.733 + Sweden Building 05K0006 + 7.733 + Sweden Building 05K0007 + 7.733 + Sweden Building 05K0008 + 7.733 + Sweden Building 05K0009 + 7.733 + Sweden Building 05K0010 + 7.733 + Sweden Building 05K0011 + 7.733 + Sweden Building 05K0012 + 7.6 + Sweden Building 05K0013 + 7.733 + Sweden Building 05K0014 + 7.083 +

433

Exact periodic solutions of the sixth-order generalized Boussinesq equation  

Science Journals Connector (OSTI)

This paper examines a class of nonlinear sixth-order generalized Boussinesq-like equations (SGBE): utt = uxx + 3(u2)xx + uxxxx + ?uxxxxxx, ? R, depending on the positive parameter ?. Hirota's bilinear transformation method is applied to the above class of non-integrable equations and exact periodic solutions have been obtained. The results confirmed the well-known nonlinear superposition principle.

O Y Kamenov

2009-01-01T23:59:59.000Z

434

Hamiltonian description of self-consistent wave-particle dynamics in a periodic Frederic Andre,1,  

E-Print Network [OSTI]

of the electron, self-acceleration and acausality, also appear incompatible with the existence of a wellHamiltonian description of self-consistent wave-particle dynamics in a periodic structure Fr conserves energy and excludes self-acceleration. A complete Hamiltonian formulation results from adding

Paris-Sud XI, Université de

435

The systemic velocities of four long-period cataclysmic variable stars  

E-Print Network [OSTI]

Although a large number of orbital periods of cataclysmic variable stars (CVs) have been measured, comparison of period and luminosity distributions with evolutionary theory is affected by strong selection effects. A test has been discovered which is independent of these selection effects and is based upon the kinematics of CVs (Kolb & Stehle, 1996). If the standard models of evolution are correct then long-period (P_orb > 5 hrs) CVs should be typically less than 1.5 Gyr old, and their line-of-sight velocity dispersion ($\\sigma_\\gamma$) should be small. We present results from a pilot study which indicate that this postulate is indeed true. Four long-period dwarf novae (EM Cyg, V426 Oph, SS Cyg and AH Her) were observed over a complete orbit, in order that accurate radial velocities be obtained. We find values of -1.7, 5.4, 15.4 and 1.8 km/s with uncertainties of order 3 km/s, referred to the dynamical Local Standard of Rest (LSR), leading to a dispersion of ~ 8 km/s. Calculation of a 95 per cent confidence interval gives the result 4 < \\sigma_\\gamma < 28 km/s compared to a prediction of 15 km/s. We also have an improved determination of mass donor spectral type, K_2 and q for the four systems.

R. C. North; T. R. Marsh; U. Kolb; V. S. Dhillon; C. K. J. Moran

2002-01-31T23:59:59.000Z

436

Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data  

E-Print Network [OSTI]

This paper presents results of an all-sky search for periodic gravitational waves in the frequency range [50,1?190]??Hz and with frequency derivative range of ?[-20,1.1]×10[superscript -10]??Hz?s[superscript -1] for the ...

Barsotti, Lisa

437

All-sky search for periodic gravitational waves in the full S5 LIGO data  

E-Print Network [OSTI]

We report on an all-sky search for periodic gravitational waves in the frequency band 50–800 Hz and with the frequency time derivative in the range of 0 through -6×10[superscript -9]??Hz/s. Such a signal could be produced ...

Barsotti, Lisa

438

Governments' and Terrorists' Defense and Attack in a T-Period Game  

Science Journals Connector (OSTI)

We analyze how a government allocates its resources between attacking to downgrade a terrorist's resources and defending against a terrorist attack. Analogously, the terrorist allocates its resources between attacking a government's asset and defending ... Keywords: conflict, contest success function, dynamics, game theory, multiple-period game, terror capacity, terrorism, threat

Kjell Hausken; Jun Zhuang

2011-03-01T23:59:59.000Z

439

Periodic orbit analysis of a system with continuous symmetry - a tutorial  

E-Print Network [OSTI]

Dynamical systems with translational or rotational symmetry arise frequently in studies of spatially extended physical systems, such as Navier-Stokes flows on periodic domains. In these cases, it is natural to express a state of the fluid in terms of a Fourier series truncated to a finite number of modes. Here we study a 4-dimensional two-mode SO(2)-equivariant model of this type, the smallest possible truncation that retains the symmetry while remaining high-dimensional enough to allow for chaotic dynamics. A crucial step in analysis of such a system is symmetry reduction. We use the model to illustrate different symmetry-reduction schemes. Its relative equilibria are conveniently determined by rewriting the dynamics in terms of a symmetry-invariant polynomial basis. However, for study of chaotic dynamics, the `method of slices', applicable also to very high-dimensional problems, is preferable. We show that a Poincar\\'e section within the `slice' can be used to further reduce this flow to what is for all practical purposes a unimodal map. This enables us to systematically determine all relative periodic orbits and their symbolic dynamics up to any desired period. We then compute several dynamical averages using relative periodic orbits and discuss the convergence of such computations.

Nazmi Burak Budanur; Daniel Borrero-Echeverry; Predrag Cvitanovi?

2014-11-12T23:59:59.000Z

440

To Tell the Truth: Management Forecasts in Periods of Accounting Fraud Stephen P. Baginski*  

E-Print Network [OSTI]

To Tell the Truth: Management Forecasts in Periods of Accounting Fraud Stephen P. Baginski of fraud firms' management earnings forecasts to the changes observed in a sample of control firms matched on industry, size, and fraud risk. We find that, although managers of control firms significantly increase

O'Toole, Alice J.

Note: This page contains sample records for the topic "5-cm period undulator" 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

QUANTUM ENERGY EXPECTATION IN PERIODIC TIME-DEPENDENT HAMILTONIANS VIA GREEN  

E-Print Network [OSTI]

QUANTUM ENERGY EXPECTATION IN PERIODIC TIME-DEPENDENT HAMILTONIANS VIA GREEN FUNCTIONS C´ESAR R. DE. Introduction 1 2. Average Energy and Green Functions 4 3. Applications 10 3.1. Time-Independent Hamiltonians 10(t). For each positive and discrete observable A (which we call a probe energy), we derive a formula

442

Non-periodic finite-element formulation of KohnSham density functional theory  

E-Print Network [OSTI]

Non-periodic finite-element formulation of Kohn­Sham density functional theory Phanish-element formulation for Kohn­Sham density functional theory (KS-DFT). We transform the original variational problem, dislocations and crack tips using density functional theory (DFT) at reasonable computational cost by retaining

Ortiz, Michael

443

Dental analysis of Classic period population variability in the Maya area  

E-Print Network [OSTI]

DENTAL ANALYSIS OF CLASSIC PERIOD POPULATION VARIABILITY IN THE MAYA AREA A Dissertation by ANDREW KENNETH SCHERER Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... Morphology and Size......................................................50 Dental Anthropology and Human Population Variation...........................................57 Previous Studies of Ancient Mesoamerican Population...

Scherer, Andrew Kenneth

2005-02-17T23:59:59.000Z

444

Periodic Broadcast and Patching Services -Implementation, Measurement, and Analysis in an Internet  

E-Print Network [OSTI]

Periodic Broadcast and Patching Services - Implementation, Measurement, and Analysis in an Internet to multime- dia steams by a large number of clients. Current research in this area has focussed primarily these algorithms. We present measurements detailing the overheads associated with the various server compo- nents

Massachusetts at Amherst, University of

445

Periodic Broadcast and Patching Services Implementation, Measurement, and Analysis in an Internet  

E-Print Network [OSTI]

Periodic Broadcast and Patching Services ­ Implementation, Measurement, and Analysis in an Internet time al- lowing asynchronous access to multimedia steams by a large number of clients. Current research, and explore the issues that arise when implementing these algorithms. We present measurements detailing

Massachusetts at Amherst, University of

446

Digital video analysis of nonequilibrium periodic patterns induced in nematics by magnetic reorientation  

Science Journals Connector (OSTI)

Early-time dynamics of transient periodic structures in reorienting lyotropic nematics are analyzed via digital video microscopy. Measurements of the time dependence of the pattern power spectrum and critical wave number are presented. The data are compared to the results of a simple linear theory.

J. P. McClymer; M. M. Labes; M. R. Kuzma

1988-02-15T23:59:59.000Z

447

Solid State Division progress report for period ending March 31, 1992  

SciTech Connect (OSTI)

During this period, the division conducted a broad, interdisciplinary materials research program with emphasis on theoretical solid state physics, superconductivity, neutron scattering, synthesis and characterization of materials, ion beam and laser processing, and the structure of solids and surfaces. The High Flux Isotope Reactor was returned to full operation.

Green, P.H.; Hinton, L.W. (eds.)

1992-09-01T23:59:59.000Z

448

TWO NEW LONG-PERIOD HOT SUBDWARF BINARIES WITH DWARF COMPANIONS  

SciTech Connect (OSTI)

Hot subdwarf stars with F-K main sequence binary companions have been known for decades, but the first orbital periods for such systems were published just recently. Current observations suggest that most have long periods, on the order of years, and that some are or once were hierarchical triple systems. As part of a survey with the Hobby-Eberly Telescope, we have been monitoring the radial velocities of several composite-spectra binaries since 2005 in order to determine their periods, velocities, and eccentricities. Here we present observations and orbital solutions for two of these systems, PG 1449+653 and PG 1701+359. Similar to the other sdB+F/G/K binaries with solved orbits, their periods are long, 909 and 734 days, respectively, and pose a challenge to current binary population synthesis models of hot subdwarf stars. Intrigued by their relatively large systemic velocities, we also present a kinematical analysis of both targets and find that neither is likely a member of the Galactic thin disk.

Barlow, Brad N.; Wade, Richard A. [Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States); Liss, Sandra E. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States); Green, Elizabeth M., E-mail: bbarlow@psu.edu [Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721 (United States)

2013-07-01T23:59:59.000Z

449

THE QUASI-BIENNIAL PERIODICITY AS A WINDOW ON THE SOLAR MAGNETIC DYNAMO CONFIGURATION  

SciTech Connect (OSTI)

Manifestations of the solar magnetic activity through periodicities of about 11 and 2 years are now clearly seen in all solar activity indices. In this paper, we add information about the mechanism driving the 2-year period by studying the time and latitudinal properties of acoustic modes that are sensitive probes of the subsurface layers. We use almost 17 years of high-quality resolved data provided by the Global Oscillation Network Group to investigate the solar cycle changes in p-mode frequencies for spherical degrees l from 0 to 120 and 1600 {mu}Hz {<=}{nu} {<=} 3500 {mu}Hz. For both periodic components of solar activity, we locate the origin of the frequency shift in the subsurface layers and find evidence that a sudden enhancement in amplitude occurs in just the last few hundred kilometers. We also show that, in both cases, the size of the shift increases toward equatorial latitudes and from minimum to maximum solar activity, but, in agreement with previous findings, the quasi-biennial periodicity (QBP) causes a weaker shift in mode frequencies and a slower enhancement than that caused by the 11-year cycle. We compare our observational findings with the features predicted by different models, that try to explain the origin of this QBP and conclude that the observed properties could result from the beating between a dipole and quadrupole magnetic configuration of the dynamo.

Simoniello, R.; Turck-Chieze, S. [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, CEA, IRFU, SAp, Centre de Saclay, F-91191 Gif-sur-Yvette (France); Jain, K.; Tripathy, S. C.; Hill, F. [National Solar Observatory, Tucson, AZ 85719 (United States); Baldner, C. [W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305-4085 (United States); Finsterle, W. [PMOD/WRC Physikalisch-Meteorologisches Observatorium Davos-World Radiation Center, 7260 Davos Dorf (Switzerland); Roth, M., E-mail: rosaria.simoniello@cea.fr [Kiepenheuer Institute for Solar Physics, Freiburg (Germany)

2013-03-10T23:59:59.000Z

450

Small angle neutron scattering on periodically deformed polymers A. R. Rennie  

E-Print Network [OSTI]

765 Small angle neutron scattering on periodically deformed polymers A. R. Rennie Institut für Phys-768 SEPTEMBRE 1984, 1. Introduction. Neutron scattering has proved a useful tool for the investigation of a wide time for a small angle neutron scattering spectrum is several minutes. Obser- vation on rapidly

Boyer, Edmond

451

An FFT-based Galerkin method for homogenization of periodic media  

Science Journals Connector (OSTI)

In 1994, Moulinec and Suquet introduced an efficient technique for the numerical resolution of the cell problem arising in homogenization of periodic media. The scheme is based on a fixed-point iterative solution to an integral equation of the Lippmann-Schwinger ... Keywords: Conjugate gradients, Fourier transform, Galerkin approximation, Heterogeneous media, Numerical homogenization, Trigonometric polynomials

Jaroslav Vond?ejc, Jan Zeman, Ivo Marek

2014-08-01T23:59:59.000Z

452

Time series study of urban rainfall suppression during clean-up periods  

E-Print Network [OSTI]

and relatively clean sites through the time range before and during their clean-up periods to see how the air quality may affect the precipitation amount. By comparing the annual precipitation amount between two polluted sites with different elevations we...

Geng, Jun

2008-10-10T23:59:59.000Z

453

Time series study of urban rainfall suppression during clean-up periods  

E-Print Network [OSTI]

and relatively clean sites through the time range before and during their clean-up periods to see how the air quality may affect the precipitation amount. By comparing the annual precipitation amount between two polluted sites with different elevations we...

Geng, Jun

2009-05-15T23:59:59.000Z

454

LINEAR TIME PERIODIC MODELLING OF POWER ELECTRONIC DEVICES FOR POWER SYSTEM HARMONIC ANALYSIS AND SIMULATION  

E-Print Network [OSTI]

LINEAR TIME PERIODIC MODELLING OF POWER ELECTRONIC DEVICES FOR POWER SYSTEM HARMONIC ANALYSIS by simulation. 1. INTRODUCTION The variety and the wide spread use of power electronic devices in the power networks is due to their diverse and multiple functions: compensation, protection and interface

Boyer, Edmond

455

Analysis of the Contention Access Period of IEEE 802.15.4 MAC  

E-Print Network [OSTI]

by small batteries, the radio itself and the protocol stack design must be energy conserving above all and energy consumption. This analysis is facilitated by a modeling of the contention access period as non the analysis. Categories and Subject Descriptors: C.2.1 [Computer-Communication Networks]: Network Architecture

Roy, Sumit

456

INVESTIGATION OF PERIODIC BOUNDARY CONDITIONS IN MULTIPASSAGE CASCADE FLOWS USING OVERSET GRIDS  

E-Print Network [OSTI]

. Computational results are presented for two and four passage, subsonic and tran­ sonic flows through a turbine and a compressor cascade. The overset grid solutions over the multi­passage periodic domains agree well in Refers to inflow exit Refers to outflow a Acoustic speed A Max. amplitude of the plunging motion c Blade

Tuncer, Ismail H.

457

Summary: An Approximately 1.3-Year Periodicity in ap and IMP 8 Solar Wind Observations  

E-Print Network [OSTI]

Summary: An Approximately 1.3-Year Periodicity in ap and IMP 8 Solar K Wind Observations . I. Paularena and J. D. Richardson A A Center for Space Research, Massachusetts Institute of Technology, MD C G. S. Gordon, Jr. and A. J. Lazarus enter for Space Research, Massachusetts Institute

Richardson, John

458

Coincident 1.3-year periodicities in the ap geomagnetic index and the solar wind  

E-Print Network [OSTI]

Coincident 1.3-year periodicities in the ap geomagnetic index and the solar wind K. I. Paularena Center for Space Research, Massachusetts Institute of Technology, Cambridge, Massachusetts A. Szabo. Richardson Center for Space Research, Massachusetts Institute of Technology, Cambridge, Massachusetts

Richardson, John

459

Release and Phase Partitioning of Metals from Anoxic Estuarine Sediments during Periods of Simulated Resuspension  

Science Journals Connector (OSTI)

Periodically, marine sediments are subjected to physical processes which resuspend them into the water column, releasing previously sequestered metals. ... Resuspension energies vary greatly over time, with particle dynamics affected by the changing force and frequency of collisions sustained by particles, along with the quantity of sediment resuspended (13). ... A particle entrainment simulator (PES) was used to perform sediment resuspensions (16). ...

Mark G. Cantwell; Robert M. Burgess; Dana R. Kester

2002-11-06T23:59:59.000Z

460

Quarterly RCRA Groundwater Monitoring Data for the Period April Through June 2006  

SciTech Connect (OSTI)

This report provides information about RCRA groundwater monitoring for the period April through June 2006. Seventeen RCRA sites were sampled during the reporting quarter. Sampled sites include seven monitored under groundwater indicator evaluation (''detection'') programs, eight monitored under groundwater quality assessment programs, and two monitored under final-status programs.

Hartman, Mary J.

2006-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "5-cm period undulator" 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

Periodic Charging Scheme for Fixed-Priority Real-Time Systems with Renewable Energy  

E-Print Network [OSTI]

to the limited capacity of the energy storage unit. With energy harvesting, in theory it becomes possiblePeriodic Charging Scheme for Fixed-Priority Real-Time Systems with Renewable Energy Mario Bambagini, Fairfax, VA, USA e-mail: aydin@cs.gmu.edu Abstract--Energy harvesting systems are gaining increasing

Aydin, Hakan

462

Periodic variability in cetacean strandings: links to large-scale climate events  

Science Journals Connector (OSTI)

...disturbing activities (e.g. those involving seismic or sonar operations) to be scheduled for periods...R.E 1994Climatic cycles may help explain fish recruitment in south east AustraliaAust. Fish 53 20-22. Thresher, R.E 2002Solar correlates...

2005-01-01T23:59:59.000Z

463

EXTENDING THE CONCEPTS OF RETURN PERIOD AND RETURN LEVEL TO A CHANGING CLIMATE  

E-Print Network [OSTI]

-Stationarity in Extremes (3) Risk Communication under Stationarity (4) Risk Communication under Climate Change (5;#12;(4) Risk Communication Under Climate Change · One Approach -- "Effective" return level Permit "return levelEXTENDING THE CONCEPTS OF RETURN PERIOD AND RETURN LEVEL TO A CHANGING CLIMATE Rick Katz Institute

Katz, Richard

464

Nonlinear friction of a damped dimer sliding on a periodic substrate S. Gonalves,1,2,  

E-Print Network [OSTI]

Nonlinear friction of a damped dimer sliding on a periodic substrate S. Gonçalves,1,2, * V. M, USA (Received 23 July 2004; published 12 November 2004) The nonlinear sliding friction of a dimer over that the friction force has an approximate v-3 depen- dence if the velocity is sufficiently large

Kenkre, V.M.

465

Attractiveness of periodic orbits in parametrically forced systems with time-increasing friction  

E-Print Network [OSTI]

Attractiveness of periodic orbits in parametrically forced systems with time- increasing friction with time-increasing friction Michele Bartuccelli,1,a) Jonathan Deane,1,b) and Guido Gentile2,c) 1 oscillator in the presence of friction, and study numerically how time-varying friction affects the dynamics

Bartuccelli, Michele

466

NEURAL PLASTICITY VOLUME 6, NO. 4, 1999 Temporal Coding of Periodicity Pitch in the  

E-Print Network [OSTI]

NEURAL PLASTICITY VOLUME 6, NO. 4, 1999 Temporal Coding of Periodicity Pitch in the Auditory System for pitch and timbre in the auditory nerve and cochlear nucleus. Neural pulse codes can be divided single Type I auditory nerve fibers. Features in such distri- butions correspond closely with pitches

Cariani, Peter

467

The interaction of daily lighting period and light intensity on growth of some greenhouse plants  

Science Journals Connector (OSTI)

The effect of lighting period and light intensity on the growth of Begonia, Chrysanthemum, Hedera, Kalanchoe and Pelargonium was investigated. The growth of the plants usually increased more when the lighting period was extended from 12 to 18 h or 16 to 20 h than from 18 to 24 or 20 to 24 h when using a constant flux density. When using the same daily (photosynthetic active radiation) PAR the growth was best when the light was given in 20 h, instead of 16 or 24 h. Increasing the light intensity from 14 to 42 or 70 ?mol m?2 s?1 the plant growth increased and usually more when it was increased from 14 to 42 than when it was increased to 70 ?mol m?2 s?1. There was for Begonia and Kalanchoe a significant interaction between lighting period and light intensity on the dry-matter production, but not for the other plants. For Begonia there was a significant increase in number of buds and flowers when increasing the lighting period from 16 to 20 or 24 h a day, while this had no influence on number of days to flowering for either Begonia or Pelargonium. Number of days to flowering and number of buds for Begonia was significantly affected with increasing light intensity from 14 to 42 ?mol m?2 s?1, but there was no effect with a further increase.

H.R. Gislerød; I.M. Eidsten; L.M. Mortensen

1989-01-01T23:59:59.000Z

468

SHORTENING DAYLIGHT PERIODS BETWEEN MAY 15 AND SEPTEMBER 12 AND THE PELT CYCLE OF THE MINK  

Science Journals Connector (OSTI)

...light on the hypophysis - Effects of long-continued night lighting' on hypophysectomized female ferrets and those with optic...elsewhere in the near future. CHEONG-YIN WONG DEPARTMENT O HORTICuLTuRE, MICHIGAN STATE COLLEGE SHORTENING DAYLIGHT PERIODS BE-TWEEN...

Thomas Hume Bissonnette; Everett Wilson

1939-05-05T23:59:59.000Z

469

Weekly Security Incident Log Period of May 27 -Jun 2, 2013  

E-Print Network [OSTI]

/30/2013 02:37 PM Emergency Medical 2013-000958 ROSS BUILDING - NORTH TOWER Subject not Identified SecurityWeekly Security Incident Log Period of May 27 - Jun 2, 2013 Incident No. Reported Date Building and a Facilities Electrician responded to a report that a lamp standard on the north side of the William Small

470

Weekly Security Incident Log Period of Jun 2 -Jun 8, 2014  

E-Print Network [OSTI]

. A description of a suspect was obtained. 6/4/2014 06:39 PM Theft, Under 2014-000979 ROSS BUILDING - NORTH TOWERWeekly Security Incident Log Period of Jun 2 - Jun 8, 2014 Incident No. Reported Date Building Name lot. No injuries were reported. 6/2/2014 06:19 PM Motor Vehicle Incident 2014-000960 TECHNOLOGY

471

Ultrafast laser induced periodic sub-wavelength aluminum surface structures and nanoparticles in air and liquids  

SciTech Connect (OSTI)

In this communication, we demonstrate the generation of laser-induced periodic sub-wavelength surface structures (LIPSS) or ripples on a bulk aluminum (Al) and Al nanoparticles (NPs) by femtosecond (fs) laser direct writing technique. Laser irradiation was performed on Al surface at normal incidence in air and by immersing in ethanol (C{sub 2}H{sub 5}OH) and water (H{sub 2}O) using linearly polarized Ti:sapphire fs laser pulses of ?110 fs pulse duration and ?800?nm wavelength. Field emission scanning electron microscope is utilized for imaging surface morphology of laser written structures and it reveals that the spatial periodicity as well as the surface morphology of the LIPSS depends on the surrounding dielectric medium and also on the various laser irradiation parameters. The observed LIPSS have been classified as low spatial frequency LIPSS which are perpendicularly oriented to the laser polarization with a periodicity from 460 to 620?nm and high spatial frequency LIPSS which spectacles a periodicity less than 100?nm with the orientation parallel to the polarization of the incident laser beam. Fabricated colloidal solutions, which contain the Al NPs, were characterized by UV-Vis absorption spectroscopy and transmission electron microscopy (TEM). TEM results reveal the formation of internal cavities in Al NPs both in ethanol and water. Formation mechanism of LIPSS and cavities inside the nanoparticles are discussed in detail.

Kuladeep, Rajamudili; Dar, Mudasir H.; Rao, D. Narayana, E-mail: dnrsp@uohyd.ac.in, E-mail: dnr-laserlab@yahoo.com [School of Physics, University of Hyderabad, Hyderabad 500046 (India); Deepak, K. L. N. [Department of Physics and Center for Research in Photonics, University of Ottawa, 150 Louis Pasteur, Ottawa K1N6N5, Ontario (Canada)

2014-09-21T23:59:59.000Z

472

Periodically Intermittent Stabilization of Delayed Neural Networks Based on Piecewise Lyapunov Functions/Functionals  

Science Journals Connector (OSTI)

This paper is concerned with the stabilization problem of delayed neural networks via a periodically intermittent controller. Two cases of time-varying bounded delays are considered: one is the time-varying delay without any constraints on the delay ... Keywords: Delayed neural networks, Intermittent control, Linear matrix inequalities, Piecewise Lyapunov functions/functionals

Wu-Hua Chen, Jiacheng Zhong, Zhiyong Jiang, Xiaomei Lu

2014-12-01T23:59:59.000Z

473

Periodic Flux Variability of Stars due to the Reflex Doppler Effect Induced by Planetary Companions  

E-Print Network [OSTI]

Upcoming space-based photometric satellites offer the possibility of detecting continuum flux variability at the micro-magnitude level. We show that the Doppler flux variability induced by the reflex motion of stars due to planetary companions has an amplitude of (3-alpha)K/c, where K is the reflex radial velocity amplitude and alpha is the logarithmic slope of source spectral flux in the observed frequency band. For many of the known close-in planetary systems with periods less than ~0.2 years, the periodic Doppler variability is of order a micromagnitude, and is significant relative to the variability caused by reflected light from the planetary companion. For companions with periods greater than ~0.2 years, the Doppler signal is larger than the reflected light signal. We show that the future photometric satellites should reach the sensitivity to detect this Doppler variability. In particular, the Kepler satellite should have the photon-noise sensitivity to detect at a signal-to-noise ratio > 5, all planets with minimum mass greater than 5 Jupiter masses, and periods less than 0.1 years around the 10,000 main-sequence stars with spectral types A through K and apparent magnitude V<12 in its field-of-view.

Abraham Loeb; B. Scott Gaudi

2003-03-10T23:59:59.000Z

474

A Web Tool for Age–Period–Cohort Analysis of Cancer Incidence and Mortality Rates  

Science Journals Connector (OSTI)

...research-article Cancer Surveillance Research A Web Tool for Age-Period-Cohort Analysis of Cancer...that can be accessed through a user-friendly Web tool. Results: Input data for the Web tool consist of age-specific numbers of events...

Philip S. Rosenberg; David P. Check; William F. Anderson

2014-11-01T23:59:59.000Z

475

Periodicity detection and localization using spike timing from the AER EAR  

E-Print Network [OSTI]

Periodicity detection and localization using spike timing from the AER EAR Theodore Yu1 , Andrew Event Representation (AER) where each spike carries the identity of the sender. There are a handful of silicon cochleae with an Address Event type representation [4][5][6][7]. The AER EAR chip that we use

Liu, Shih-Chii

476

A Web Tool for Age–Period–Cohort Analysis of Cancer Incidence and Mortality Rates  

Science Journals Connector (OSTI)

...research-article Cancer Surveillance Research A Web Tool for Age-Period-Cohort Analysis of Cancer...that can be accessed through a user-friendly Web tool. Results: Input data for the Web tool consist of age-specific numbers of events...

Philip S. Rosenberg; David P. Check; William F. Anderson

477

Symmetric Periodic Orbits in Three Sub-Problems of the N-body Problem  

E-Print Network [OSTI]

We study three sub-problems of the N-body problem that have two degrees of freedom, namely the n-pyramidal problem, the planar double-polygon problem, and the spatial double-polygon problem. We prove the existence of several families of symmetric periodic orbits, including ``Schubart-like" orbits and brake orbits, by using topological shooting arguments.

Nai-Chia Chen

2013-11-17T23:59:59.000Z

478

Millihertz quasi-periodic oscillations and thermonuclear bursts from Terzan 5: A showcase of burning regimes  

E-Print Network [OSTI]

We present a comprehensive study of the thermonuclear bursts and millihertz quasi-periodic oscillations (mHz QPOs) from the neutron star (NS) transient and 11 Hz X-ray pulsar IGR J17480–2446, located in the globular cluster ...

Linares, M.

479

Measuring the period of the delta Scuti variable U1425-01208594 in Cassiopeia  

E-Print Network [OSTI]

The variability of U1425-01208594 was recently discovered by Schmidtobreick et al, who suggested that it is a member of the delta Scuti family of pulsating stars. Photometry conducted by the authors revealed a period of 0.06695(8) d and a peak-to-peak amplitude of 0.014 mag.

Jeremy Shears; David Boyd; Steve Brady; Ian Miller; Roger Pickard

2007-11-30T23:59:59.000Z

480

Industrial Revolutions and Consumption: A Common Model to the Various Periods of Industrialization  

E-Print Network [OSTI]

Industrial Revolutions and Consumption: A Common Model to the Various Periods of Industrialization and establish a plausible link between consumption structure evolutions and industrial revolutions. In particular, we show that an industrial revolution starts with a "smithian growth process", which is demand

Boyer, Edmond

Note: This page contains sample records for the topic "5-cm period undulator" 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

Recent advances about the uniqueness of the slowly oscillating periodic solutions of Wright's equation  

E-Print Network [OSTI]

Recent advances about the uniqueness of the slowly oscillating periodic solutions of Wright's equation Jean-Philippe Lessard Abstract An old conjecture in delay equations states that Wright's equation to rigorously compute a global continuous branch of SOPS of Wright's equation. Using this method, we show

Lessard, Jean-Philippe

482

Devil's Staircase in the Magnetoresistance of a Periodic Array of Scatterers  

SciTech Connect (OSTI)

The nonlinear response to an external electric field is studied for classical noninteracting charged particles under the influence of a uniform magnetic field, a periodic potential, and an effective friction force. We find numerical and analytical evidence that the ratio of transverse to longitudinal resistance forms a Devil's staircase. The staircase is attributed to the dynamical phenomenon of mode-locking.

Wiersig, Jan; Ahn, Kang-Hun

2001-07-09T23:59:59.000Z

483

Global Clock, Physical Time Order and Pending Period Analysis in Multiprocessor Systems  

E-Print Network [OSTI]

In multiprocessor systems, various problems are treated with Lamport's logical clock and the resultant logical time orders between operations. However, one often needs to face the high complexities caused by the lack of logical time order information in practice. In this paper, we utilize the \\emph{global clock} to infuse the so-called \\emph{pending period} to each operation in a multiprocessor system, where the pending period is a time interval that contains the performed time of the operation. Further, we define the \\emph{physical time order} for any two operations with disjoint pending periods. The physical time order is obeyed by any real execution in multiprocessor systems due to that it is part of the truly happened operation orders restricted by global clock, and it is then proven to be independent and consistent with traditional logical time orders. The above novel yet fundamental concepts enables new effective approaches for analyzing multiprocessor systems, which are named \\emph{pending period analy...

Chen, Yunji; Hu, Weiwu

2009-01-01T23:59:59.000Z

484

On the joint distribution of wave heights and periods: The role of the spectral bandwidth  

SciTech Connect (OSTI)

The influence of spectral bandwidth on the probabilistic structure of the joint distribution of wave heights and periods is analyzed by means of simulated wave records. The authors put the emphasis on its effect upon the asymmetric and bimodal structure of the distributions. Moreover, the adequacy of some theoretical models to describe such features is considered.

Rodriguez, R.G.; Rubio, R.F.; Pacheco, M.M.; Martinez, M.A. [Univ. de Las Palmas de Gran Canaria (Spain). Dept. de Fisica

1996-12-31T23:59:59.000Z

485

Periodic Finite-Type Shift Spaces Marie-Pierre Beal, Member, IEEE, Maxime Crochemore, Member, IEEE,  

E-Print Network [OSTI]

Periodic Finite-Type Shift Spaces Marie-Pierre B´eal, Member, IEEE, Maxime Crochemore, Member, IEEE are the c-charge con- strained codes over the bipolar alphabet {±1}. Here, the code M.-P. B´eal and M-mail: {beal,mac}@univ- mlv.fr). B. E. Moision was with the Mathematical Sciences Research Center, Lucent

Siegel, Paul H.

486

The evolution of circular loops of a cosmic string with periodic tension  

E-Print Network [OSTI]

In this paper the equation of circular loops of cosmic string with periodic tension is investigated in the Minkowski spacetime and Robertson-Walker universe respectively. We find that the cosmic string loops possessing this kind of time-varying tension will evolve to oscillate instead of collapsing to form a black hole if their initial radii are not small enough.

Wang, Leilin

2012-01-01T23:59:59.000Z

487

LONGITUDINAL OSCILLATIONS AND FLIGHTS OF THE STRING PENDULUM DRIVEN BY A PERIODIC  

E-Print Network [OSTI]

LONGITUDINAL OSCILLATIONS AND FLIGHTS OF THE STRING PENDULUM DRIVEN BY A PERIODIC FORCE by A://meeng.technion.ac.il/Research/TReports/2008/ETR-2008-01.html #12;Longitudinal Oscillations and Flights of the String Pendulum Driven@tx.technion.ac.il October 23, 2008 Abstract The longitudinal oscillations of a string pendulum are being discussed

Rimon, Elon

488

The discovery of plutonium reorganized the periodic table and aided the discovery of new elements  

SciTech Connect (OSTI)

The modern Periodic Table derives principally from the work of the great Russian scientist Dimitri Mendeleev, who in 1869 enunciated a 'periodic law' that the properties of the elements are a periodic function of their atomic weights, and arranged the 65 known elements in a 'periodic table'. Fundamentally, every column in the main body of the Periodic Table is a grouping of elements that display similar chemical and physical behavior. Similar properties are therefore exhibited by elements with widely different mass. Chemical periodicity is central to the study of chemistry, and no other generalization comes close to its ability to systematize and rationalize known chemical facts. With the development of atomic theory, and an understanding of the electronic structure of atoms, chemical periodicity and the periodic table now find their natural explanation in the electronic structure of atoms. Moving from left to right along any row, the elements are arranged sequentially according to nuclear charge (the atomic number). Electrons counter balance that nuclear charge, hence each successive element has one more electron in its configuration. The electron configuration, or distribution of electrons among atomic orbitals, may be determined by application of the Pauli principle (paired spin in the same orbital) and the aufbau principle (which outlines the order of filling of electrons into shells of orbitals - s, p, d, f, etc.) such that in a given atom, no two electrons may have all four quantum numbers identical. In 1939, only three elements were known to be heavier than actinium: thorium, protactinium, and uranium. All three exhibited variable oxidation states and a complex chemistry. Thorium, protactinium and uranium were assumed to be d-transition metals and were placed in the Periodic Table under hafnium, tantalum, and tungsten, respectively. By 1940, McMillan and Abelson bombarded uranium atoms with slow neutrons and successfully identified atoms of element 93, which they named neptunium after the planet Neptune. This rapidly set the stage for the discovery of the next succeeding element, plutonium (Seaborg, McMillan, Kennedy, and Wahl, 1940), named after the next planet away from the Sun, Pluto. The newly discovered elements were presumed to fit comfortably in the Periodic Table under rhenium and osmium, respectively. However, subsequent tracer chemical experiments showed that neptunium and plutonium were closer in their chemical properties to uranium than their presumed homologues, rhenium and osmium. Spectroscopic evidence also indicated that the new elements were not typical transition elements, but had f-electrons in their valence shell. Thus, several researchers, including McMillan and Wahl, and Zachariasen at Los Alamos, suggested that these elements might be part of a second inner-transition series in which the 5f-electron subshell was being filled. It was not clear, however, where the new series would begin. McMillian had proposed a 'uraninide series' that started with neptunium, but attempts to isolate elements with atomic numbers 95 and 96 based on assumed similarities to uranium were unsuccessful. Both Wahl and Zacharias en had proposed a thoride series that started with protactinium. In 1944, Seaborg proposed that the series started with thorium, and that all of the elements heavier than actinium constituted an 'actinide' series similar to the lanthanides. Because the 5f-shell began filling in the same relative position as the 4f-shell, the electronic configuration of elements in the two series would be similar. Guided by the hypothesis that elements 95 and 96 were homologues of europium and gadolinium, new experiments were designed and the elements were uniquely synthesized and separated from all others. The new elements were subsequently named americium and curium. Seaborg's 'Actinide Concept' thus played a major role in the discovery of the transplutonium elements. It provided the framework that supported synthesis, isolation, and identification of the succeeding actinide elements berkelium through lawrenci

Clark, David L [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

489

LBNL-54244 Life-cycle Cost and Payback Period Analysis for Commercial Unitary Air Conditioners  

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

44 44 Life-cycle Cost and Payback Period Analysis for Commercial Unitary Air Conditioners Greg Rosenquist, Katie Coughlin, Larry Dale, James McMahon, Steve Meyers Energy Analysis Department Environmental Energy Technologies Division Ernest Orlando Lawrence Berkeley National Laboratory University of California Berkeley, CA 94720 March 2004 This work was supported by the Office of Building Technologies of the U.S. Department of Energy, under Contract No. DE-AC03-76SF00098. ii iii ABSTRACT This report describes an analysis of the economic impacts of possible energy efficiency standards for commercial unitary air conditioners and heat pumps on individual customers in terms of two metrics: life-cycle cost (LCC) and payback period (PBP). For each of the two equipment classes considered, the 11.5 EER provides the largest mean LCC savings. The results

490

DOE Extends Comment Period on Notice of Inquiry Under the Energy  

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

October 14, 2010 - 10:17am October 14, 2010 - 10:17am Addthis Today, in response to a formal request, General Counsel Scott Blake Harris approved a second and final extension of the public comment period to November 30, 2010 on DOE's Notice of Inquiry (75 FR 43945) soliciting comment on the development of regulations to carry out section 934 of the Energy Independence and Security Act of 2007, which implements the Convention on Supplementary Compensation for Nuclear Damage. The original deadline of September 27, 2010 was extended to October 27, 2010 (75 FR 51986) in response to public comment. The signed extension provided here will be published shortly in the Federal Register. Addthis Related Articles DOE Extends Comment Period on Notice of Inquiry Under the Energy Independence and Security Act

491

Report Period: EIA ID NUMBER: Instructions: (e.g., Street Address, Bldg, Floor, Suite)  

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

Report Period: Report Period: EIA ID NUMBER: Instructions: (e.g., Street Address, Bldg, Floor, Suite) Secure File Transfer option available at: (e.g., PO Box, RR) Electronic Transmission: The PC Electronic Data Reporting Option (PEDRO) is available. Zip Code: - If interested in software, call (202) 586-9659. Email form to: Fax form to: (202) 586-9772 - - Mail form to: Oil & Gas Survey - - U.S. Department of Energy Ben Franklin Station PO Box 279 Washington, DC 20044-0279 Questions? Call toll free: 1-800-638-8812 OOG.SURVEYS@eia.doe.gov Contact Name: Version No.: 2013.01 Date of this Report: Mo Day State: Year Phone No.: DOMESTIC CRUDE OIL FIRST PURCHASE REPORT Company Name: A completed form must be filed by the 30th calendar day following the end of the report

492

Influence of Long-Period Variations of Total Ozone Content on Climate  

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

Influence of Long-Period Variations of Total Ozone Content on Climate Influence of Long-Period Variations of Total Ozone Content on Climate Change in Twentieth Century Zuev, V Institute of Atmospheric Optics Zueva, N. Institute of Atmospheric Optics Bondarenko, S Institute of Atmospheric Optics Category: Atmospheric State and Surface It is shown that during long-term total ozone decrease everywhere at middle and high latitudes there takes place the destruction of balance in global carbon cycle first of all due to reduction of photosynthetical СО2 sink in consequence of UV-B radiation stress of vegetable biota. As a result, СО2 concentrations in the atmosphere considerably increase, enhancing the "greenhouse effect." Based on reconstruction of behavior of stratospheric ozone between 1600 and 2000 from dendrochronologic data, it is shown that

493

Long- and short-period nanostructure formation on semiconductor surfaces at different ambient conditions  

SciTech Connect (OSTI)

We present the results of studies of nanoripples formation during interaction of the 800 nm, 120, and 35 fs pulses with semiconductor surfaces. Simultaneous appearance of the ripples with the period (700 nm) close to the wavelength of interacting radiation and considerably smaller period (180 nm) was achieved. We discuss the experimental conditions for the formation of these nanoripples (incidence angle, polarization, number of shots, etc.). We show a decisive role of surrounding medium on the quality of nanoripples formation. The self-organization of high-quality nanoripples was clearly shown in the case of dense surrounding medium (methanol), while in the case of insufficient amount of surrounding material (i.e., at different vacuum conditions), the quality of ripples considerably decreased.

Ganeev, R. A. [Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan); Institut national de la recherche scientifique, Centre Energie, Materiaux et Telecommunications, 1650 Lionel-Boulet, Varennes, Quebec J3X 1S2 (Canada); Institute of Electronics, Uzbekistan Academy of Sciences, Akademgorodok, 33, Dormon Yoli Street, Tashkent 100125 (Uzbekistan); Baba, M.; Kuroda, H. [Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan); Faculty of Medicine, Saitama Medical University, 38 Hongou, Moro, Moroyama, Iruma, Saitama 350-0495 (Japan); Ozaki, T. [Institut national de la recherche scientifique, Centre Energie, Materiaux et Telecommunications, 1650 Lionel-Boulet, Varennes, Quebec J3X 1S2 (Canada)

2010-05-15T23:59:59.000Z

494

Analytical formulation of 3D dynamic homogenization for periodic elastic systems  

E-Print Network [OSTI]

Homogenization of the equations of motion for a three dimensional periodic elastic system is considered. Expressions are obtained for the fully dynamic effective material parameters governing the spatially averaged fields by using the plane wave expansion (PWE) method. The effective equations are of Willis form (Willis 1997) with coupling between momentum and stress and tensorial inertia. The formulation demonstrates that the Willis equations of elastodynamics are closed under homogenization. The effective material parameters are obtained for arbitrary frequency and wavenumber combinations, including but not restricted to Bloch wave branches for wave propagation in the periodic medium. Numerical examples for a 1D system illustrate the frequency dependence of the parameters on Bloch wave branches and provide a comparison with an alternative dynamic effective medium theory (Shuvalov 2011) which also reduces to Willis form but with different effective moduli.

A. N. Norris; A. L. Shuvalov; A. A. Kutsenko

2012-01-13T23:59:59.000Z

495

Hydraulic Characteristics of the Lower Snake River During Periods of Juvenile Fall Chinook Migration  

SciTech Connect (OSTI)

This report documents a four-year study to assess hydraulic conditions in the lower Snake River. The work was conducted for the Bonneville Power Administration, U.S. Department of Energy, by the Pacific Northwest National Laboratory. Cold water released from the Dworshak Reservoir hypolimnion during mid- to late-summer months cools the Clearwater River far below equilibrium temperature. The volume of released cold water augments the Clearwater River, and the combined total discharge is on the order of the Snake River discharge when the two rivers meet at their confluence near the upstream edge of Lower Granite Reservoir. With typical temperature differences between the Clearwater and Snake rivers of 10°C or more during July and August, the density difference between the two rivers during summer flow augmentation periods is sufficient to stratify Lower Granite Reservoir as well as the other three reservoirs downstream. Because cooling of the river is desirable for migrating juvenile fall Chinook salmon (Oncorhynchus tshawytscha) during this same time period, the amount of mixing and cold water entrained into Lower Granite Reservoir’s epilimnion at the Clearwater/Snake River confluence is of key biological importance to juvenile fall Chinook salmon. Data collected during this project indicates the three reservoirs downstream of Lower Granite also stratify as direct result of flow augmentation from Dworshak Reservoir. These four lower Snake reservoirs are also heavily influenced by wind forcing at the water’s surface, and during periods of low river discharge, often behave like a two-layer lake. During these periods of stratification, lower river discharge, and wind forcing, the water in the upper layer of the reservoir is held in place or moves slightly upstream. This upper layer is also exposed to surface heating and may warm up to temperatures close to equilibrium temperature. The depth of this upper warm layer and its direction of travel may also be of key biological importance to juvenile fall Chinook salmon. This report describes field data collection, modeling, and analysis of hydrodynamic and temperature conditions in the Lower Granite Reservoir during the summer flow augmentation periods of 2002, 2003, and 2004 plus a brief one-week period in 2005 of Lower Monumental, Little Goose, and Lower Granite Reservoirs. Circulation patterns in all four lower Snake River reservoirs were numerically simulated for periods of 2002, 2003, 2004, and 2005 using CE-QUAL-W2. Simulation results show that these models are sufficiently capable of matching diurnal and long term temperature and velocity changes in the reservoirs. In addition, the confluence zone of the Clearwater and Snake rivers was modeled using the 3-D model Flow3-D. This model was used to better understand mixing processing and entrainment. Once calibrated and validated, the reservoir models were used to investigate downstream impacts of alternative reservoir operation schemes, such as increasing or decreasing the ratio of Clearwater to Snake discharge. Simulation results were also linked with the particle tracking model FINS to better understand alterations of integrated metrics due to alternative operation schemes. These findings indicate that significant alterations in water temperature throughout the lower Snake River are possible by altering hypolimnetic discharges from Dworshak Reservoir and may have a significant impact on the behavior of migrating juvenile fall Chinook salmon during periods of flow augmentation.

Cook, Chris B.; Dibrani, Berhon; Richmond, Marshall C.; Bleich, Matthew D.; Titzler, P. Scott; Fu, Tao

2006-01-30T23:59:59.000Z

496

Tracking multiple generation and suppression of secondary electrons on periodic triangular surface  

SciTech Connect (OSTI)

To research the dynamic course of multipactor suppression on the periodically patterned surface, tens of electron collision processes are tracked by numerical calculation. The influences of microwave frequency, amplitude of RF electric field, slope angle, the local field enhancement, and the tilted incident electric field on the multipactor suppression are studied by tracking multi-generation electrons' trajectories, hopping and flight time, collision energy, and secondary emission yield. Meanwhile, the dynamic processes of secondary electrons on the periodic surface are analyzed by particle-in-cell (PIC) simulation. The PIC results are consistent with the analytical results in which the electrons fly reciprocatingly between the slopes and impact on the slopes; the methods of increasing the slope angle, enlarging the RF field, and lowering the frequency in a certain range are helpful to enhance the multipactor suppression steadily and persistently.

Li, S.; Wang, J. G.; Zhu, M.; Peng, J. C.; Xie, J. L.; Wu, X. L.; Guo, L. T. [Laboratory on Science and Technology of High Power Microwave, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China)] [Laboratory on Science and Technology of High Power Microwave, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China); Chang, C.; Xiong, Z. F. [Laboratory on Science and Technology of High Power Microwave, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China) [Laboratory on Science and Technology of High Power Microwave, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China); Department of Engineering Physics, Tsinghua University, Beijing 10084 (China)

2013-12-15T23:59:59.000Z

497

Glann Seaborg's Contributions to Heavy Element Science and the Periodic Table  

SciTech Connect (OSTI)

In celebrating the centennial anniversary of the birth of Glenn T. Seaborg it is fitting that we recount and pay tribute to his legacy. Many know of the scientific accomplishments of this man who became a legend and anyone who has attended his lectures can attest to how informative, educational, and entertaining he was. He had a beguiling and whimsical sense of humor and used this to drive home his points and share his passion and quest for discovery. The periodic table is a fundamental cornerstone of science and remains a central unifying principal. Seaborg was the architect of the actinide series of elements and their proper placement in the periodic table and co-discoverer of ten transuranium elements - one of which bears his name, element 106, seaborgium. The work and achievements of this Nobel laureate have touched the lives of many and his legacy will continue for generations to come.

Hobart, David E. [Los Alamos National Laboratory

2012-08-17T23:59:59.000Z

498

Microphysics of Neutron Star Outer Envelopes in the Periodized, Magnetic Thomas-Fermi Model  

E-Print Network [OSTI]

Observations of several types of neutron stars indicate surface temperature inhomogeneities. In recent years magneto-thermal simulations have supported the idea that the magnetic field and anisotropic heat conduction play important roles in generating these inhomogeneities. Simulations rely on crustal microphysics input heretofore calculated at the level of a plasma model -- neglecting lattice structure and electron polarizability. We focus on the low density outer envelope, treating both of these elements by a proper periodization of the magnetic Thomas-Fermi model. Our solution method involves a novel domain decomposition and we describe a scalable implementation using \\textit{Hypre}. The method may be seen as a prototype for the general class of problems involving nonlinear charge screening of periodic, quasi-low-dimensionality structures, e.g. liquid crystals. Findings include low density $c'<0$ elastic instabilities for both bcc and fcc lattices, reminiscent of the situation in some light actinides, a...

Engstrom, Tyler A; Owen, Benjamin J; Brannick, James; Hu, Xiaozhe

2014-01-01T23:59:59.000Z

499

Report Period: EIA ID NUMBER: Appendix A: Mailing Address: Appendix B:  

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

Report Period: Report Period: EIA ID NUMBER: Appendix A: Mailing Address: Appendix B: Zip Code - Secure File Transfer option available at: - - - - Email form to: OOG.SURVEYS@eia.doe.gov Fax form to: (202) 586-9772 Email address: Oil & Gas Survey U.S. Department of Energy Ben Franklin Station PO Box 279 Washington, DC 20044-0279 Questions? Call toll free: 1-800-638-8812 1. Total Acquisitions (Enter the total volume of foreign crude oil acquired during the report month for importation into the United States. This is the sum of column (l), Part III, excluding resubmission.) 2. Offshore Inventories (Enter the total volume of foreign oil owned by the firm, for eventual importation into the United States which is held in storage outside the United States and/or is enroute to the United States as of the

500

Modelling and optimisation for design of hydrogen networks for multi-period operation  

Science Journals Connector (OSTI)

Hydrogen management is a problem of increasing importance: hydrogen consumption of refineries is rising sharply with additional capacities of hydrocracking and hydrotreating units in order to comply with cleaner fuel specifications. Product Specifications for transportation fuels are becoming increasingly stringent to ensure production of environmentally more benign fuels. Hydrogen management techniques currently do not account for varying operating conditions of hydrogen consuming processes and assume constant operating conditions. A novel approach is developed for the design of flexible hydrogen networks that can remain optimally operable under multiple periods of operation. The proposed methodology for multi-period design of hydrogen networks can take into account pressure differences, maximum capacity of existing equipment, and optimal placement of new equipment such as compressors.

Muhammad Imran Ahmad; Nan Zhang; Megan Jobson

2010-01-01T23:59:59.000Z