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Analysis of Bulk DKDP Damage Distribution, Obscuration and Pulse Length Dependence

Description: Recent LLNL experiments reported elsewhere at this conference explored the pulselength dependence of 351 nm bulk damage incidence in DKDP. The results found are consistent, in part, with a model in which a distribution of small bulk initiators is assumed to exist in the crystal and the damage threshold is determined by reaching a critical temperature. The observed pulse length dependence can be explained as being set by the most probable defect capable of causing damage at a given pulselength. … more
Date: December 15, 2000
Creator: Feit, M D; Rubenchik, A M & Runkel, M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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On the ``inverse'' isotope effect in organic superconductors: New findings and implications

Description: The inverse deuterium isotope effect, previously found in K-(BEDT-TTF){sub 2}CU(NCS){sub 2}, is also found in two other BEDT-TTF-based superconductors with different packing motifs and different types of anions. Remarkably, the magnitude of the isotope shift is essentially identical in all three superconductors, ca. +0.26 {+-} 0.06 K. These results, when taken together with the recent results of Lang et al. on the uniaxial pressure derivatives of T{sub c}, suggest that the inverse isotope effec… more
Date: July 24, 2000
Creator: Kini, A. M.; Schlueter, J. A.; Ward, B. H.; Geiser, U. W. & Wang, H. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design, Fabrication and Test of the React and Wind, Nb(3)Sn, Ldx Floating Coil Conductor.

Description: The Levitated Dipole Experiment (LDX) is a novel approach for studying magnetic confinement of a fusion plasma. In this approach, a superconducting ring coil is magnetically levitated for up to 8 hours a day in the center of a 5 meter diameter vacuum vessel. The levitated coil, with on-board helium supply, is called the gloating Coil (F-Coil). Although the maximum field at the coil is only 5.3 tesla, a react-and-wind Nb{sub 3}Sn conductor was selected because the relatively high critical temper… more
Date: September 17, 2000
Creator: Smith, B. A.; Michael, P. C.; Minervini, J. V.; Takayasu, M.; Schultz, J. H.; Gregory, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Enhanced mass removal due to phase explosion during high irradiance nanosecond laser ablation of silicon

Description: The morphology of craters resulting from high irradiance laser ablation of silicon was measured using a white light interferometry microscope. The craters show a dramatic increase in their depth and volume at a certain irradiance, indicating a change in the primary mechanism for mass removal. Laser shadowgraph imaging was used to characterize and differentiate the mass ejection processes for laser irradiances above and below the threshold value. Time-resolved images show distinct features of th… more
Date: May 20, 2000
Creator: Yoo, Jong Hyun
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Nuclear Energy Research Initiative (NERI) Program. Technical progress report

Description: During the past quartile the authors have explored the thermodynamics of various metal hydroxide and oxyhydroxide dehydration reactions of iron, nickel, and chromium with the objective of estimating the critical temperature, T{sub cr}. This is the temperature at which the oxide is in equilibrium with the oxyhydroxide or hydroxide and water vapor under the expected repository conditions of temperature and pressure. Because localized corrosion requires the presence of an ionically conducting phas… more
Date: January 30, 2000
Creator: Engelhardt, G.R. & MacDonald, D.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Disorder-driven hysteresis-loop criticality in Co/CoO-films.

Description: The effect of magnetic disorder on the magnetization reversal process in thin Co/CoO-films has been investigated. The antiferromagnetic CoO layer allows a reversible tuning of the magnetic disorder by simple temperature variation. For temperatures above a critical temperature T{sub c}, we observe a discontinuous magnetization reversal, whereas smooth magnetization loops occur for T < T{sub c}. Our measurements establish the existence of a disorder-driven critical point in the non-equilibrium… more
Date: November 1, 2000
Creator: Berger, A.; Inomata, A.; Jiang, J. S.; Pearson, J. E. & Bader, S. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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