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Superconductivity in Filamentary Eutectic Composites. Progress Report, June 1, 1980-May 31, 1981

Description: The ac magnetic susceptibility of the Nb-Th eutectic composites in a dc magnetic field showed the existence of a mixed state in the thorium matrix material even in large fields of several kilogauss. This mixed state persisted until nearly the field at which superconductivity in the niobium filaments was destroyed. Measurements of the upper critical field H/sub c2 parallel/ were independent of filament diameter (from less than or equal to 100A to greater than or equal to 1000A) and showed less a… more
Date: 1981-22~
Creator: Zaitlin, Mark P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Dense ceramic membranes for hydrogen separation.

Description: We have developed cermet membranes that nongalvanically separate hydrogen from gas mixtures. The highest measured hydrogen flux was 20.0 cm{sup 3} (STP)/min-cm{sup 2} for an ANL-3a membrane at 900 C. For ANL-3 membranes with thickness of 40-500 {micro}m, hydrogen permeation is limited by the bulk diffusion of hydrogen through the metal phase. The effect of hydrogen partial pressure on permeation rate confirmed this conclusion, suggesting that higher permeation rates may be obtained by decreasin… more
Date: May 7, 2002
Creator: Balachandran, U.; Lee, T. H.; Wang, S.; Zhang, G. & Dorris, S. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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STABILZATION OF NEOCLASSICAL TEARING MODES BY LOCALIZED ECCD IN DIII-D

Description: Neoclassical tearing modes (NTMs) are MHD modes which can become destabilized in a tokamak by a helical pressure perturbation. The NTM is particularly well suited to control since the mode is linearly stable although nonlinearly unstable, so if the island amplitude can be decreased below a threshold size the mode will decay and vanish. One means of shrinking the island is the replacement of the ''missing'' bootstrap current by a localized current generated by electron cyclotron current drive (E… more
Date: May 1, 2002
Creator: Prater, R.; Eliss, R. A., III; La Haye, R. J.; Lohr, J. M.; Luce, T. C.; Perkins, F. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ANALYSIS OF THE LEACHING EFFICIENCY OF INHIBITED WATER AND TANK SIMULANT IN REMOVING RESIDUES ON THERMOWELL PIPES

Description: A key component for the accelerated implementation and operation of the Salt Waste Processing Facility (SWPF) is the recovery of Tank 48H. Tank 48H is a type IIIA tank with a maximum capacity of 1.3 million gallons. Video inspection of the tank showed that a film of solid material adhered to the tank internal walls and structures between 69 inch and 150 inch levels. From the video inspection, the solid film thickness was estimated to be 1mm, which corresponds to {approx}33 kg of TPB salts (as 2… more
Date: October 20, 2011
Creator: Fondeur, F.; White, T.; Oji, L.; Martino, C. & Wilmarth, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Tests and Calibration of the NIF Neutron Time of Flight Detectors

Description: The National Ignition Facility (NIF) Neutron Time of Flight (NTOF) diagnostic will measure neutron yield and ion temperature in all NIF campaigns in DD, DT, and THD* implosions. The NIF NTOF diagnostic is designed to measure neutron yield from 109 to 2 x 1019. The NTOF consists of several detectors of varying sensitivity located on the NIF at about 5 m and 20 m from the target. Production, testing, and calibration of the NIF NTOF detectors have begun at the Laboratory for Laser Energetics (LLE)… more
Date: May 15, 2008
Creator: Ali, Z. A.; Glebov, V. Yu.; Cruz, M.; Duffy, T.; Stoeckl, C.; Roberts, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Environmentally assisted cracking of LWR materials.

Description: The effect of dissolved oxygen level on fatigue life of austenitic stainless steels is discussed and the results of a detailed study of the effect of the environment on the growth of cracks during fatigue initiation are presented. Initial test results are given for specimens irradiated in the Halden reactor. Impurities introduced by shielded metal arc welding that may affect susceptibility to stress corrosion cracking are described. Results of calculations of residual stresses in core shroud we… more
Date: December 5, 1997
Creator: Chopra, O. K.; Chung, H. M.; Kassner, T. F.; Park, J. H.; Shack, W. J.; Zhang, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Improved MCFC performance with Li/Na/Ba/Ca carbonate electrolyte.

Description: Earlier electrolyte segregation tests of Li/Na carbonate used chemical analysis such as inductively coupled plasma/atomic emission spectroscopy (ICP/AES) of matrix strips wetted with carbonate and exposed to 5- to 20-V potential gradients. A segregation factor was correlated to the Li/Na carbonate composition. While fairly substantial segregation occurs at the eutectic composition of 52% Li, it is minimal at 60% to 75% Li. Such lithium-rich Li/Na carbonates may not be practical because the melt… more
Date: July 21, 1999
Creator: Centeno, C.-J.; Kaun, T. D.; Krumpelt, M. & Schoeler, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hydrothermal growth kinetics of Np(IV) oxide

Description: Toulouse, France All previous knowledge leading to this estimate is of NpO2(c) is indirect, based on thermodynamic cycles. The phase itself has heretofore not been observed as a precipitate from aqueous solution. Recent attempts (e.g., Nitsche et al., 1993; Efurd et al., 1996) to establish solubility controls on Np in oxidizing groundwaters (including J-13 groundwater) starting from high concentrations (i.e., supersaturation) have shown the formation of one or both of two Np(V) phases, NaNpO2CO… more
Date: May 11, 1998
Creator: Palmer, C. E.; Roberts, K. & Wolery, T. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Choice of Proton Driver Parameters for a Neutrino Factory

Description: We discuss criteria for designing an optimal 'green field' proton driver for a neutrino factory. The driver parameters are determined by considerations of space charge, power capabilities of the target, beam loading and available RF peak power. A neutrino factory may be the best experimental tool to unravel the physics involved in neutrino oscillation and CP violation phenomena [1]. To have sufficient neutrino flux for acceptable physics results within 5 years requires about 10{sup 22} protons … more
Date: June 26, 2006
Creator: Kirk, H. G.; Berg, J. S.; Fernow, R. C.; Gallardo, J. C.; Simos, N.; Weng, W. T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Capsule design for the National Ignition Facility

Description: Several choices exist in the design and production of capsules intended to ignite and propagate fusion burn of the DT fuel when imploded by indirect drive at the National Ignition Facility. These choices include ablator material, ablator dopant concentration and distribution, capsule dimensions, and x-ray drive profile (shock timings and strengths). The choice of ablator material must also include fabrication and material characteristics, such as attainable surface finishes, permeability, stren… more
Date: August 1, 1998
Creator: Bradley, P. A.; Cook, R. C.; Dittrich, T. R.; Haan, S. W.; Hinkel, D. E.; Marinak, M. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Emission of. gamma. rays from various materials pulsed with 14-MeV neutrons

Description: We have performed a number of experiments at LLNL recently to investigate the leakage of gamma rays from spheres of selected materials pulsed centrally with 14-MeV neutrons. Such spectral information may be carefully compared to calculational results to validate the transport models, particularly the nuclear cross section data base. In the present case, the TART code and SANDYL codes are used to explicitly calculate the observable, the recoil electron spectrum. The materials studied were H/sub … more
Date: October 1, 1987
Creator: Goldberg, E.; Hansen, L. F.; Howerton, R. J.; Komoto, T. T. & Pohl, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Biological Conversion of Synthesis Gas. Mass Transfer/Kinetic Studies

Description: Mass transfer and kinetic studies were carried out for the Rhodospirillum rubrum and Chlorobium thiosulfatophilum bacterial systems. R. rubrum is a photosynthetic anaerobic bacterium which catalyzes the biological water gas shift reaction: CO + H{sub 2}0 {yields} CO{sub 2} + H{sub 2}. C. thiosulfatophilum is also a H{sub 2}S and COS to elemental sulfur. The growth of R. rubrum may be satisfactorily carried out at 25{degree} and 30{degree}C, while CO uptake and thus the conversion of CO best occ… more
Date: March 1, 1992
Creator: Klasson, K. T.; Basu, R.; Johnson, E. R.; Clausen, E. C. & Gaddy, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics of. beta. -particle-induced exchange between H/sub 2/, D/sub 2/, and T/sub 2/ at 298 K

Description: A quadrupole mass filter system was constructed in order to measure the equilibrium constants and rates of reaction of the ..beta..-particle-induced exchanges between H/sub 2/, D/sub 2/, and T/sub 2/ at cryogenic temperatures. Even with careful calibration experiments at 298 K, we could not completely remove the mass discrimination inherent in our method. We estimate the accuracy of our room-temperature mixture analyses to be +-2.2% in the D/sub 2/-DT-T/sub 2/ system, and +-9% in the H/sub 2/-H… more
Date: January 1, 1978
Creator: Pyper, J. W.; Kelly, E. M.; Tsugawa, R. T.; Roberts, P. E. & Souers, P. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hearing Impairment and Elderly People

Description: This OTA background paper discusses the prevalence of hearing impairment and its impact on elderly people; hearing devices and services that may benefit them; and problems in the service delivery system that limit access to these devices and services.
Date: May 1986
Creator: United States. Congress. Office of Technology Assessment.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Novel Bimettallic Dispersed Catalysts for Temperature-Programmed Coal Liquefaction: Technical progress report January--March 1996

Description: Coal liquefaction may involve cleavage of methylene, dimethylene and ether bridges connecting polycyclic aromatic units and the reactions of various oxygen functional groups. Here in this quarterly, we report on the effects of dispersed Mo catalysts and H{sub 2}O addition on hydrogenation and C-C bond hydrocracking of 4-(1- naphthylmethyl)bibenzyl, abbreviated as NMBB. Recent research in this laboratory has demonstrated a strong synergistic effect between a dispersed Mo sulfide catalyst and wat… more
Date: June 1, 1996
Creator: Song, C.; Schmidt, E. & Schobert, H.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of novel copper-based sorbents for hot-gas cleanup. Technical report, March 1, 1992--May 31, 1992

Description: The objective of this investigation is to evaluate several novel copper-based binary oxides for their suitability as regenerable sorbents for hot gas cleanup application in the temperature range of 650{degrees} to 850{degrees}C. During this quarter cyclic sulfidation/regeneration tests of the sorbents Cu{sub 2}Cr-O and Cu-Ce-0 were conducted using different compositions of the feed gases to investigate the effects of H{sub 2}0, H{sub 2} and CO. These tests were conducted in a packed-bed microre… more
Date: October 1, 1992
Creator: Abbasian, J.; Hill, A. H.; Wangerow, J. R.; Flytzani-Stephanopoulos, M.; Bo, L. & Patel, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Freedom of Information Act (FOIA) Amendments: 109th Congress

Description: Enacted in 1966, the Freedom of Information Act (FOIA) was designed to enable any person -- individual or corporate, regardless of citizenship -- to request, without explanation or justification, presumptive access to existing, identifiable, unpublished, executive branch agency records on any topic. The statute specified nine categories of information that may be permissibly exempted from the rule of disclosure. Disputes over the accessibility of requested records could be ultimately settled in… more
Date: September 22, 2006
Creator: Relyea, Harold C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inter- and Intramolecular Experimental and Calculated Equilibrium Isotope Effects for (silox)₂(ᵗBu₃SiND)TiR + RH (silox = ᵗBu₃SiO): Inferred Kinetic Isotope Effects for RH/D Addition to Transient (silox)₂Ti=NSiᵗBu₃

Description: This article discusses inter- and intramolecular experimental and calculated equilibrium isotope effects.
Date: August 23, 2000
Creator: Slaughter, LeGrande M.; Wolczanski, Peter T.; Klinckman, Thomas R. & Cundari, Thomas R., 1964-
Item Type: Refine your search to only Article
Partner: UNT College of Arts and Sciences
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Black a-Si:H sputtered films for photovoltaic solar cells. Final technical progress report, May 15, 1979-May 15, 1980

Description: Aa a first step in attempting to understand the many interrelated deposition processes and film characteristics which govern sputter deposited a-Si:H film quality, a number of important basic film characteristics as a function of the preparation parameters total plasma pressure P/sub T/ and H/sub 2/ partial pressure, %H (in Ar), for the range P/sub T/ = 5 to 70mTorr and %H = 0.10, were examined in detail. A series of films were systematically prepared in this region of deposition parameter spac… more
Date: January 1, 1980
Creator: Messier, R & Tsong, I S.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Production of elemental sulfur and methane from H{sub 2}S and CO{sub 2} derived from a coal desulfurization process. Quarterly technical progress report, October 1, 1995--December 31, 1995

Description: During the ninth quarter of the project, bench scale experiments were performed to investigate the adsorption ability of different kinds of materials within sulfur vapor environment. Four kinds of adsorbents have been tested. The experiment results indicated that activated carbon was the best of four adsorbents tested. The adsorption process may be applicable to promote conversion of H{sub 2}S in the H{sub 2}S and SO{sub 2} reaction system.
Date: December 31, 1995
Creator: Gong, S. -Y.; Jiang, X.; Khang, S. -J. & Keener, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Confinement and stability of VH-mode discharges in the DIII-D tokamak

Description: A regime of very high confinement (VH-mode) has been observed in neutral beam-heated deuterium discharges in the DIII-D tokamak with thermal energy confinement times up to [approx]3.6 times that predicted by the ITER-89P L-mode scaling and 2 times that predicted by ELM-free H-mode thermal confinement scalings. This high confinement has led to increased plasma performance, n[sub D] (0)T[sub i](0)[tau][sub E] = 2 [times] 10[sup 20] m[sup [minus]3] keV sec with I[sub p] = 1.6 MA, B[sub T] = 2.1 T,… more
Date: October 1, 1992
Creator: Taylor, T. S.; Osborne, T. H.; Burrell, K. H.; Carlstrom, T. N.; Chan, V. S.; Chu, M. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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