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Reel support for wind the magnet of the Mirror Fusion Test Facility

Description: The reel support has three main functions. It must support the reel, which is 134 in. in diameter, 40 in. wide, and stores up to 8,600 ft of superconductor weighing 8,600 lb. It also must serve as a tensioning device for the superconductor, exerting a force of up to 600 lb. Further, the support must move the reel vertically and laterally to facilitate the winding of the magnets. The support has been designed and is now being fabricated. This paper describes the performance requirements of this … more
Date: September 7, 1977
Creator: Ling, R.C.; Chang, Y. & Hunt, L.D.
Partner: UNT Libraries Government Documents Department
open access

Numerical modeling of self-limiting and self-enhancing caprock alteration induced by CO2 storage in a depleted gas reservoir

Description: This paper presents numerical simulations of reactive transport which may be induced in the caprock of an on-shore depleted gas reservoir by the geological sequestration of carbon dioxide. The objective is to verify that CO{sub 2} geological disposal activities currently being planned for the study area are safe and do not induce any undesired environmental impact. In our model, fluid flow and mineral alteration are induced in the caprock by penetration of high CO{sub 2} concentrations from the… more
Date: September 7, 2007
Creator: Xu, Tianfu; Gherardi, Fabrizio; Xu, Tianfu & Pruess, Karsten
Partner: UNT Libraries Government Documents Department
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Reactions of Monomeric [1,2,4-(Me3C)3C5H2]2CeH and CO with orwithout H2:An Experimental and Computational Study

Description: Addition of CO to [1,2,4-(Me3C)3C5H2]2CeH, Cp'2CeH, intoluene yields the cis (Cp'2Ce)2(mu-OCHCHO), in which the cis enediolategroup bridges the two metallocene fragments. The cis enediolatequantitatively isomerizes intramolecularly to the trans-enediolate inC6D6 at 100oC over seven months. When the solvent is pentane,Cp'2Ce(OCH2)CeCp'2 forms, in which the oxomethylene group or theformaldehyde dianion bridges the two metallocene fragments. The cisenediolate is suggested to form by insertion of C… more
Date: September 7, 2006
Creator: Werkema, Evan L.; Maron, Laurent; Eisenstein, Odile & Andersen, Richard A.
Partner: UNT Libraries Government Documents Department
open access

A Automated Tool for Supporting FMEAs of Digital Systems

Description: Although designs of digital systems can be very different from each other, they typically use many of the same types of generic digital components. Determining the impacts of the failure modes of these generic components on a digital system can be used to support development of a reliability model of the system. A novel approach was proposed for such a purpose by decomposing the system into a level of the generic digital components and propagating failure modes to the system level, which genera… more
Date: September 7, 2008
Creator: Yue, M.; Chu, T. L.; Martinez-Guridi, G. & Lehner, J.
Partner: UNT Libraries Government Documents Department
open access

Strongly Interacting Matter at High Energy Density

Description: This lecture concerns the properties of strongly interacting matter (which is described by Quantum Chromodynamics) at very high energy density. I review the properties of matter at high temperature, discussing the deconfinement phase transition. At high baryon density and low temperature, large N{sub c} arguments are developed which suggest that high baryonic density matter is a third form of matter, Quarkyonic Matter, that is distinct from confined hadronic matter and deconfined matter. I fina… more
Date: September 7, 2008
Creator: McLerran, L.
Partner: UNT Libraries Government Documents Department
open access

PLASMA WINDOW FOR VACUUM - ATMOSPHERE INTERFACE AND FOCUSING LENS OF SOURCES FOR NON-VACUUM MATERIAL MODIFICATION.

Description: Material modifications by ion implantation, dry etching, and micro-fabrication are widely used technologies, all of which are performed in vacuum, since ion beams at energies used in these applications are completely attenuated by foils or by long differentially pumped sections, which ate currently used to interface between vacuum and atmosphere. A novel plasma window, which utilizes a short arc for vacuum-atmosphere interface has been developed. This window provides for sufficient vacuum atmos… more
Date: September 7, 1997
Creator: Hershcovitch, A.
Partner: UNT Libraries Government Documents Department
open access

High Pressure Structure of Half-Metallic CrO2

Description: Evidence for a structural phase transition from rutile {alpha}-CrO{sub 2} phase I (P4{sub 2}/mnm) to orthorhombic {beta}-CrO{sub 2} phase II (CaCl{sub 2}-like, Pnnm) is presented using angle-resolved synchrotron x-ray diffraction and high sensitivity confocal Raman spectroscopy. The transition to the CaCl{sub 2} structure, which appears to be second-order, occurs at 12 {+-} 3 GPa without any measurable discontinuity in volume, but is accompanied by an apparent increase in compressibility. Raman… more
Date: September 7, 2005
Creator: Maddox, B.; Yoo, C. S.; Kasinathan, D.; Pickett, W. E. & Scalettar, R. T.
Partner: UNT Libraries Government Documents Department
open access

Targets for the National Ignition Campaign

Description: The National Ignition Facility (NIF) is a 192 beam Nd-glass laser facility presently under construction at Lawrence Livermore National Laboratory (LLNL) for performing inertial confinement fusion (ICF) and experiments studying high energy density (HED) science. When completed in 2009, NIF will be able to produce 1.8 MJ, 500 TW of ultraviolet light for target experiments that will create conditions of extreme temperatures (>10{sup 8} K), pressures (10 GBar) and matter densities (>100 g/cm{… more
Date: September 7, 2007
Creator: Atherton, L J
Partner: UNT Libraries Government Documents Department
open access

Numerical modeling of injection and mineral trapping of CO2 withH2S and SO2 in a Sandstone Formation

Description: Carbon dioxide (CO{sub 2}) injection into deep geologic formations could decrease the atmospheric accumulation of this gas from anthropogenic sources. Furthermore, by co-injecting H{sub 2}S or SO{sub 2}, the products respectively of coal gasification or combustion, with captured CO{sub 2}, problems associated with surface disposal would be mitigated. We developed models that simulate the co-injection of H{sub 2}S or SO{sub 2} with CO{sub 2} into an arkose formation at a depth of about 2 km and … more
Date: September 7, 2004
Creator: Xu, Tianfu; Apps, John A.; Pruess, Karsten & Yamamoto, Hajime
Partner: UNT Libraries Government Documents Department
open access

NON-DESTRUCTIVE RADIOCARBON DATING: NATURALLY MUMMIFIED INFANT BUNDLE FROM SW TEXAS

Description: Plasma oxidation was used to obtain radiocarbon dates on six different materials from a naturally mummified baby bundle from the Lower Pecos River region of southwest Texas. This bundle was selected because it was thought to represent a single event and would illustrate the accuracy and precision of the plasma oxidation method. Five of the materials were clearly components of the original bundle with 13 dates combined to yield a weighted average of 2135 {+-} 11 B.P. Six dates from a wooden stic… more
Date: September 7, 2004
Creator: Steelman, K L; Rowe, M W; Turpin, S A; Guilderson, T P & Nightengale, L
Partner: UNT Libraries Government Documents Department
open access

Probing the nonlocal approximation to resonant collisions ofelectrons with diatomic molecules

Description: A numerically solvable two-dimensional model introduced bythe authors [Phys. Rev. A 73, 032721 (2006)]is used to investigate thevalidity of the nonlocal approximation to the dynamics of resonantcollisions of electrons with diatomic molecules. The nonlocalapproximation to this model is derived in detail, all underlyingassumptions are specified and explicit expressions for the resonant andnon-resonant (background) T matrix for the studied processes are given.Different choices of the so-called dis… more
Date: September 7, 2007
Creator: Houfek, Karel; Rescigno, Thomas N. & McCurdy, C. William
Partner: UNT Libraries Government Documents Department
open access

Solving the geologic issues in nuclear waste disposal

Description: Technical problems with nuclear waste disposal are largely geological. If these are not solved, curtailment of nuclear power development may follow, resulting in loss of an important element in the national energy supply. Present knowledge and credible advances are capable of solving these problems provided a systems view is preserved and a national development plan is followed. This requires identification of the critical controllable elements and a systematic underground test program to prove… more
Date: September 7, 1979
Creator: Towse, D.
Partner: UNT Libraries Government Documents Department
open access

Modeling level structures of odd-odd deformed nuclei

Description: A technique for modeling quasiparticle excitation energies and rotational parameters in odd-odd deformed nuclei has been applied to actinide species where new experimental data have been obtained by use of neutron-capture gamma-ray spectroscopy. The input parameters required for the calculation were derived from empirical data on single-particle excitations in neighboring odd-mass nuclei. Calculated configuration-specific values for the Gallagher-Moszkowski splittings were used. Calculated and … more
Date: September 7, 1984
Creator: Hoff, R.W.; Kern, J.; Piepenbring, R. & Boisson, J.P.
Partner: UNT Libraries Government Documents Department
open access

Inner-shell ionization of lithium-like chromium ions

Description: We have used high-resolution x-ray spectroscopy to investigate inner-shell ionization of Cr{sup 21+} ions by electron impact using the Electron Beam Ion Trap at Lawrence Livermore Laboratory. Our measurements indicate that inner-shell ionization enhances the intensity of the radiative transition 1s2s {sup 3}S{sub 1}{yields}1s{sup 2}{sup 1}S{sub 0}. 7 refs., 4 figs., 1 tab.
Date: September 7, 1990
Creator: Vogel, D. A.; Beiersdorfer, P.; Marrs, R. E.; Wong, K. L. & Zasadzinski, R.
Partner: UNT Libraries Government Documents Department
open access

Field enhancement of a 12. 5-T magnet using holmium poles

Description: Unlike conventional ferromagnetic materials such as iron and Supermendur, which produce saturation magnetization fields of approximately 2 T, several of the rare-earth elements (holmium, terbium, erbium, gadolinium, and dysprosium) yield saturated fields of nearly 4 T. This property makes these rare-earth metals particularly attractive as flux concentrators for use in superconducting magnets. This report concerns the use of holmium inserts to enhance the peak useful field of the nominally 12.5-… more
Date: September 7, 1984
Creator: Hoard, R. W.; Mance, S. C.; Leber, R. L.; Dalder, E. N.; Chaplin, M. R.; Blair, K. et al.
Partner: UNT Libraries Government Documents Department
open access

Element-specific magnetic hysteresis measurements, a new application of circularly polarized soft x-rays

Description: Element-specific magnetic hysteresis measurements on heteromagnetic materials have been achieved by using circularly polarized soft-x- rays. Dramatically different Fe and Co hysteresis curves of Fe/Cu/Co trilayers were obtained by recording the magnetic circular dichroism (MCD) at their respective L{sub 3} white lines as a function of applied magnetic field. The data resolve the complicated hysteresis curves, observed by conventional magnetometry, and determine the individual magnetic moments f… more
Date: September 7, 1993
Creator: Lin, H. J.; Chen, C. T.; Meigs, G.; Idzerda, Y. U.; Chaiken, A.; Prinz, G. A. et al.
Partner: UNT Libraries Government Documents Department
open access

Implementation of a laboratory information management system for environmental regulatory analyses

Description: The Savannah River Technology Center created a second instance of its ORACLE based PEN LIMS to support site Environmental Restoration projects. The first instance of the database had been optimized for R&D support and did not implement rigorous sample tracking, verification, and holding times needed to support regulatory commitments. Much of the R&D instance was transferable such as the work control functions for backlog reports, work assignment sheets, and hazard communication support. A major… more
Date: September 7, 1993
Creator: Spencer, W. A.; Aiken, H. B.; Spatz, T. L.; Miles, W. F. & Griffin, J. C.
Partner: UNT Libraries Government Documents Department
open access

ITER CS Model Coil and CS Insert Test Results

Description: The Inner and Outer modules of the Central Solenoid Model Coil (CSMC) were built by US and Japanese home teams in collaboration with European and Russian teams to demonstrate the feasibility of a superconducting Central Solenoid for ITER and other large tokamak reactors. The CSMC mass is about 120 t, OD is about 3.6 m and the stored energy is 640 MJ at 46 kA and peak field of 13 T. Testing of the CSMC and the CS Insert took place at Japan Atomic Energy Research Institute (JAERI) from mid March … more
Date: September 7, 2000
Creator: Martovetsky, N.; Michael, P.; Minervini, J.; Radovinsky, A.; Takayasu, M.; Thome, R. et al.
Partner: UNT Libraries Government Documents Department
open access

Design of a 50 TW/20 J chirped-Pulse Amplification Laser for High-Energy-Density Plasma Physics Experiments at the Nevada Terawatt Facility of the University of Nevada

Description: We have developed a conceptual design for a 50 TW/20 J short-pulse laser for performing high-energy-density plasma physics experiments at the Nevada Terawatt Facility of the University of Nevada, Reno. The purpose of the laser is to develop proton and x-ray radiography techniques, to use these techniques to study z-pinch plasmas, and to study deposition of intense laser energy into both magnetized and unmagnetized plasmas. Our design uses a commercial diode-pumped Nd:glass oscillator to generat… more
Date: September 7, 2003
Creator: Erlandson, A. C.; Astanovitskiy, A.; Batie, S.; Bauer, B.; Bayramian, A.; Caird, J. A. et al.
Partner: UNT Libraries Government Documents Department
open access

Flash x-ray. [Nondestructive testing of material that is moving or changing very rapidly]

Description: The complementary techniques of flash x-ray radiography (FXR) and flash x-ray diffraction (FXD) provide access to a unique domain in nondestructive materials testing. FXR is useful in studies of macroscopic properties during extremely short time intervals, and FXD, the newer technique, is used in studies of microscopic properties. Although these techniques are similar in many respects, there are some substantial differences. FXD generally requires low-voltage, line-radiation sources and extreme… more
Date: September 7, 1976
Creator: Johnson, Q. & Pellinen, D.
Partner: UNT Libraries Government Documents Department
open access

Fireside Corrosion USC Steering

Description: Oxy-Fuel Fireside Research goals are: (1) Determine the effect of oxy-fuel combustion on fireside corrosion - (a) Flue gas recycle choice, Staged combustion ramifications, (c) JCOAL Collaboration; and (2) Develop methods to use chromia solubility in ash as an 'ash corrosivity' measurement - (a) Synthetic ashes at first, then boiler and burner rig ashes, (b) Applicable to SH/RH conditions.
Date: September 7, 2011
Creator: Holcomb, G. R. & Tylczak, J.
Partner: UNT Libraries Government Documents Department
open access

Radiosensitivity profiles from a panel of ovarian cancer cell lines exhibiting genetic alterations in p53 and disparate DNA-dependent protein kinase activities

Description: The variability of radiation responses in ovarian tumors and tumor-derived cell lines is poorly understood. Since both DNA repair capacity and p53 status can significantly alter radiation sensitivity, we evaluated these factors along with radiation sensitivity in a panel of sporadic human ovarian carcinoma cell lines. We observed a gradation of radiation sensitivity among these sixteen lines, with a five-fold difference in the LD50 between the most radiosensitive and the most radioresistant cel… more
Date: September 7, 2009
Creator: Langland, Gregory T.; Yannone, Steven M.; Langland, Rachel A.; Nakao, Aki; Guan, Yinghui; Long, Sydney B.T. et al.
Partner: UNT Libraries Government Documents Department
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