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Electron Charged Graphite-based Hydrogen Storage Material
The electron-charge effects have been demonstrated to enhance hydrogen storage capacity using materials which have inherent hydrogen storage capacities. A charge control agent (CCA) or a charge transfer agent (CTA) was applied to the hydrogen storage material to reduce internal discharge between particles in a Sievert volumetric test device. GTI has tested the device under (1) electrostatic charge mode; (2) ultra-capacitor mode; and (3) metal-hydride mode. GTI has also analyzed the charge distribution on storage materials. The charge control agent and charge transfer agent are needed to prevent internal charge leaks so that the hydrogen atoms can stay on the storage material. GTI has analyzed the hydrogen fueling tank structure, which contains an air or liquid heat exchange framework. The cooling structure is needed for hydrogen fueling/releasing. We found that the cooling structure could be used as electron-charged electrodes, which will exhibit a very uniform charge distribution (because the cooling system needs to remove heat uniformly). Therefore, the electron-charge concept does not have any burden of cost and weight for the hydrogen storage tank system. The energy consumption for the electron-charge enhancement method is quite low or omitted for electrostatic mode and ultra-capacitor mode in comparison of other hydrogen storage …
Date:
March 14, 2012
Creator:
0812, Dr. Chinbay Q. Fan R&D Manager Office of Technology and Innovations Phone: 847 768
Object Type:
Report
System:
The UNT Digital Library
Measurement of the Top Quark-Pair Production Cross Section With ATLAS in Pp Collisions at $\sqrt{s}=7$ TeV
None
Date:
June 14, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
International Linear Collider Reference Design Report Volume 2: Physics at the ILC
The triumph of 20th century particle physics was the development of the Standard Model and the confirmation of many of its aspects. Experiments determined the particle constituents of ordinary matter, and identified four forces that hold matter together and transform it from one form to another. Particle interactions were found to obey precise laws of relativity and quantum theory. Remarkable features of quantum physics were observed, including the real effects of 'virtual' particles on the visible world. Building on this success, particle physicists are now able to address questions that are even more fundamental, and explore some of the deepest mysteries in science. The scope of these questions is illustrated by this summary from the report Quantum Universe: (1) Are there undiscovered principles of nature; (2) How can we solve the mystery of dark energy; (3) Are there extra dimensions of space; (4) Do all the forces become one; (5) Why are there so many particles; (6) What is dark matter? How can we make it in the laboratory; (7) What are neutrinos telling us; (8) How did the universe begin; and (9) What happened to the antimatter? A worldwide program of particle physics investigations, using multiple approaches, is already …
Date:
November 14, 2011
Creator:
Aarons, Gerald; Abe, Toshinori; Abernathy, Jason; Ablikim, Medina; Abramowicz, Halina; Adey, David et al.
Object Type:
Article
System:
The UNT Digital Library
Direct Numerical Simulation of Autoignition in a Jet in a Cross-Flow Configuration: ALCF-2 Early Science Program Technical Report
None
Date:
May 14, 2013
Creator:
Abdilghanie, A.; Frouzakis, C.E. & Fischer, P. F.
Object Type:
Report
System:
The UNT Digital Library
Observation of Supernova Remnant IC 443 with the Fermi Large Area Telescope
None
Date:
December 14, 2012
Creator:
Abdo, A. A.
Object Type:
Report
System:
The UNT Digital Library
Insights Into the High-Energy Gamma-Ray Emission of Markarian 501 From Extensive Multifrequency Observations in the Fermi Era
None
Date:
June 14, 2012
Creator:
Abdo, A. A.; Ackermann, M.; Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the Cosmic Ray e+ plus e- Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2 m{sup 2}sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply-falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E{sup -3.0} and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.
Date:
May 14, 2012
Creator:
Abdo, Aous A.; /Naval Research Lab, Wash., D.C.; Ackermann, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Ajello, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. et al.
Object Type:
Article
System:
The UNT Digital Library
Observation of Two-Neutrino Double-Beta Decay in Xe-136 with EXO-200
We report the observation of two-neutrino double-beta decay in {sup 136}Xe with T{sub 1/2} = 2.11 {+-} 0.04(stat) {+-} 0.21(syst) x 10{sup 21} yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for {sup 136}Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.
Date:
September 14, 2012
Creator:
Ackerman, N.; Aharmim, B.; Auger, M.; Auty, D. J.; Barbeau, P. S.; Barry, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
Satellite galaxies of the Milky Way are among the most promising targets for dark matter searches in gamma rays. We present a search for dark matter consisting of weakly interacting massive particles, applying a joint likelihood analysis to 10 satellite galaxies with 24 months of data of the Fermi Large Area Telescope. No dark matter signal is detected. Including the uncertainty in the dark matter distribution, robust upper limits are placed on dark matter annihilation cross sections. The 95% confidence level upper limits range from about 10{sup -26} cm{sup 3} s{sup -1} at 5 GeV to about 5 x 10{sup -23} cm{sup 3} s{sup -1} at 1 TeV, depending on the dark matter annihilation final state. For the first time, using gamma rays, we are able to rule out models with the most generic cross section ({approx}3 x 10{sup -26} cm{sup 3} s{sup -1} for a purely s-wave cross section), without assuming additional boost factors.
Date:
September 14, 2012
Creator:
Ackermann, M.; Ajello, M.; Albert, A.; Atwood, W. B.; Baldini, L.; Ballet, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Constraints on Dark Matter Annihilation in Clusters of Galaxies with the Fermi Large Area Telescope
None
Date:
December 14, 2012
Creator:
Ackermann, M.; Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J.; Barbiellini, G. et al.
Object Type:
Article
System:
The UNT Digital Library
Israel: Background and U.S. Relations
This report explores the history of U.S.-Israeli relationships and current Israeli issues such as border security, defense, Israel-Palestinian conflicts, economy, and democracy.
Date:
February 14, 2011
Creator:
Addis, Casey L.
Object Type:
Report
System:
The UNT Digital Library
Gravitomagnetism and Spinor Quantum Mechanics
We give a systematic treatment of a spin 1=2 particle in a combined electromagnetic field and a weak gravitational field that is produced by a slowly moving matter source. This paper continues previous work on a spin zero particle, but it is largely self-contained and may serve as an introduction to spinors in a Riemann space. The analysis is based on the Dirac equation expressed in generally covariant form and coupled minimally to the electromagnetic field. The restriction to a slowly moving matter source, such as the earth, allows us to describe the gravitational field by a gravitoelectric (Newtonian) potential and a gravitomagnetic (frame-dragging) vector potential, the existence of which has recently been experimentally verified. Our main interest is the coupling of the orbital and spin angular momenta of the particle to the gravitomagnetic field. Specifically we calculate the gravitational gyromagnetic ratio as g{sub g} = 1 ; this is to be compared with the electromagnetic gyromagnetic ratio of g{sub e} = 2 for a Dirac electron.
Date:
September 14, 2012
Creator:
Adler, Ronald J.; /Stanford U., HEPL /San Francisco State U.; Chen, Pisin; /Taiwan, Natl. Taiwan U. /KIPAC, Menlo Park /SLAC; Varani, Elisa & /Unlisted
Object Type:
Article
System:
The UNT Digital Library
CRADA Final Report: Process development for hybrid solar cells
TCF funding of a CRADA between LBNL and RSLE leveraged RSLE's original $1M investment in LBNL research and led to development of a solar cell fabrication process that will bring the high efficiency, high voltage hybrid tandem solar cell closer to commercialization. RSLE has already built a pilot line at its Phoenix, Arizona site.
Date:
February 14, 2011
Creator:
Ager, Joel W.
Object Type:
Report
System:
The UNT Digital Library
Final Report
This grant resulted in three distinct scientific advances, the most important being the discovery of a inhomogeneous superconducting state first predicted over 40 years ago. Two graduate students received PhDs as a result of this grant, and a major US high magnetic field facility was rebuilt.
Date:
June 14, 2013
Creator:
Agosta, Charles C.
Object Type:
Report
System:
The UNT Digital Library
The Future of the Eurozone and U.S. Interests
This report details the consequences of the European financial crisis of 2010 beginning with the economic fallout of the Greek economy. It then highlights six factors that would be instrumental regarding the "Eurozones" future.
Date:
September 14, 2010
Creator:
Ahearn, Raymond J.; Jackson, James K.; Nelson, Rebecca M. & Weiss, Martin A.
Object Type:
Report
System:
The UNT Digital Library
Studies of non-proportionality in alkali halide and strontium iodide scintillators using SLYNCI
Recently a collaboration of LLNL and LBNL has constructed a second generation Compton coincidence instrument to study the non-proportionality of scintillators. This device, known as SLYNCI (Scintillator Light-Yield Non-proportionality Characterization Instrument), has can completely characterize a sample with less than 24 hours of running time. Thus, SLYNCI enables a number of systematic studies of scintillators since many samples can be processed in a reasonable length of time. These studies include differences in nonproportionality between different types of scintillators, different members of the same family of scintillators, and impact of different doping levels. The results of such recent studies are presented here, including a study of various alkali halides, and the impact of europium doping level in strontium iodide. Directions of future work area also discussed.
Date:
October 14, 2010
Creator:
Ahle, Larry; Bizarri, Gregory; Boatner, Lynn; Cherepy, Nerine J.; Choong, Woon-Seng; Moses, William W. et al.
Object Type:
Article
System:
The UNT Digital Library
Fermi Large Area Telescope Observations of the Supernova Remnant G8.7-0.1
We present a detailed analysis of the GeV gamma-ray emission toward the supernova remnant (SNR) G8.7-0.1 with the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. An investigation of the relationship between G8.7-0.1 and the TeV unidentified source HESS J1804-216 provides us with an important clue on diffusion process of cosmic rays if particle acceleration operates in the SNR. The GeV gamma-ray emission is extended with most of the emission in positional coincidence with the SNR G8.7-0.1 and a lesser part located outside the western boundary of G8.7-0.1. The region of the gamma-ray emission overlaps spatially connected molecular clouds, implying a physical connection for the gamma-ray structure. The total gamma-ray spectrum measured with LAT from 200 MeV-100 GeV can be described by a broken power-law function with a break of 2.4 {+-} 0.6 (stat) {+-} 1.2 (sys) GeV, and photon indices of 2.10 {+-} 0.06 (stat) {+-} 0.10 (sys) below the break and 2.70 {+-} 0.12 (stat) {+-} 0.14 (sys) above the break. Given the spatial association among the gamma rays, the radio emission of G8.7-0.1, and the molecular clouds, the decay of p0s produced by particles accelerated in the SNR and hitting the molecular clouds naturally …
Date:
September 14, 2012
Creator:
Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D. et al.
Object Type:
Article
System:
The UNT Digital Library
U.S.-U.K. Free Trade Agreement: Prospects and Issues for Congress
This report discuses the prospects of a free trade agreement between the U.K. and the U.S. after Brexit and potential issues that might be addressed in such an agreement. Congress's role in free trade agreements is also discussed.
Date:
April 14, 2017
Creator:
Akhtar, Shayerah Ilias
Object Type:
Report
System:
The UNT Digital Library
Optics and Emittance Studies Using the ATF2 Multi-OTR System
None
Date:
October 14, 2013
Creator:
Alabau-Gonzalvo, J.; Blanch Gutierrez, C.; Faus-Golfe, A.; Garcia-Garrigos, J. J.; Resta-L?pez, J.; U., /Valencia et al.
Object Type:
Article
System:
The UNT Digital Library
Biological Opinions for the Sacramento-San Joaquin Delta: A Case Law Summary
This report provides a case law summary about Biological Opinions for the Sacramento-San Joaquin Delta.
Date:
January 14, 2015
Creator:
Alexander, Kristina
Object Type:
Report
System:
The UNT Digital Library
The Lacey Act: Protecting the Environment by Restricting Trade
This report looks at the history and applications of the Lacey Act, which allows the U.S. to enforce the laws of other countries.
Date:
January 14, 2014
Creator:
Alexander, Kristina
Object Type:
Report
System:
The UNT Digital Library
IDENTIFYING IMPURITIES IN SURPLUS NON PIT PLUTONIUM FEEDS FOR MOX OR ALTERNATIVE DISPOSITION
This report provides a technical basis for estimating the level of corrosion products in materials stored in DOE-STD-3013 containers based on extrapolating available chemical sample results. The primary focus is to estimate the levels of nickel, iron, and chromium impurities in plutonium-bearing materials identified for disposition in the United States Mixed Oxide fuel process.
Date:
July 14, 2010
Creator:
Allender, J & Moore, E
Object Type:
Article
System:
The UNT Digital Library
Analysis of 2012 Meteorological Data from the Knolls Atomic Power Laboratory and Kesselring Site Operations Facilities
None
Date:
February 14, 2013
Creator:
Aluzzi, F J
Object Type:
Report
System:
The UNT Digital Library
Enhancing the Sensitivity to New Physics in the top-antitop Invariant Mass Distribution
We propose selection cuts on the LHC t{bar t} production sample which should enhance the sensitivity to New Physics signals in the study of the t{bar t} invariant mass distribution. We show that selecting events in which the t{bar t} object has little transverse and large longitudinal momentum enlarges the quark-fusion fraction of the sample and therefore increases its sensitivity to New Physics which couples to quarks and not to gluons. We find that systematic error bars play a fundamental role and assume a simple model for them. We check how a non-visible new particle would become visible after the selection cuts enhance its resonance bump. A final realistic analysis should be done by the experimental groups with a correct evaluation of the systematic error bars.
Date:
June 14, 2012
Creator:
Alvarez, Ezequiel & /SLAC, /Univ. Nacional San Luis
Object Type:
Article
System:
The UNT Digital Library