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Pu Workshop Letter

Description: In preparation for the upcoming Pu Workshop in Livermore, CA, USA, during July 14 and 15, 2006, we have begun to give some thought as to how the meeting will be structured and what will be discussed. Below, you will find our first proposal as to the agenda and contents of the meeting. From you, we need your feedback and suggestions concerning the desirability of each aspect of our proposal. Hopefully, we will be able to converge to a format that is acceptable to all parties. First, it now appea… more
Date: March 6, 2006
Creator: Tobin, J G; Schwartz, A J & Fluss, M
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Demonstration of Detuning and Wavebreaking Effects on Raman Amplification Effciency in Plasma

Description: A plasma-based resonant backward Raman amplifier/compressor for high power amplification of short laser pulses might, under ideal conditions, convert as much as 90% of the pump energy to the seed pulse. While the theoretical highest possible efficiency of this scheme has not yet been achieved, larger efficiencies than ever before obtained experimentally (6.4%) are now being reported, and these efficiencies are accompanied by strong pulse compression. Based on these recent extensive experiments,… more
Date: November 6, 2008
Creator: Yampolsky, N. A.; Fisch, N. J.; Malkin, V. M.; Valeo, E. J.; Lindberg, R.; Wurtele, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical switching and contrast enhancement in intense laser systems by cascaded optical parametric amplification

Description: Optical parametric chirped-pulse amplification (OPCPA) can be used to improve the prepulse contrast in chirped-pulse amplification systems by amplifying the main pulse with a total saturated OPCPA gain, while not affecting the preceding prepulses of the seed oscillator mode-locked pulse train. We show that a simple modification of a multistage OPCPA system into a cascaded optical parametric amplifier (COPA) results in an optical switch and extreme contrast enhancement which can completely elimi… more
Date: September 6, 2005
Creator: Jovanovic, I; Haefner, C; Wattellier, B & Barty, C J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Progress in Inertial Confinement Fusion at Lawrence Livermore National Laboratory

Description: The goals of the Inertial Fusion Program at the Lawrence Livermore National Laboratory are to study matter under extreme conditions of temperature and pressure and to produce fusion energy from inertially confined fusion fuel. With the conclusion of recent multi-kilojoule 0.53 ..mu..m experiments on Novette, we have demonstrated vastly improved plasma conditions compared to those previously obtained at LLNL with similar energies at 1.06 ..mu..m and elsewhere with 10 ..mu..m radiation. The lower… more
Date: August 6, 1984
Creator: Holzrichter, John F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LARG at chromosome 11q23 has functional characteristics of a tumor suppressor in human breast cancer

Description: Deletion of 11q23-q24 is frequent in a diverse variety of malignancies, including breast and colorectal carcinoma, implicating the presence of a tumor suppressor gene at that chromosomal region. We show here that LARG, from 11q23, has functional characteristics of a tumor suppressor. We examined a 6-Mb region on 11q23 by high-resolution deletion mapping, utilizing both loss of heterozygosity (LOH) analysis and microarray comparative genomic hybridization (CGH). LARG (also called ARHGEF12), iden… more
Date: May 6, 2008
Creator: Ong, Danny C.T.; Rudduck, Christina; Chin, Koei; Kuo, Wen-Lin; Lie, Daniel K.H.; Chua, Constance L.M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Inverse Bremsstrahlung Stabilization of Noise in the Generation of Ultra-short Intense Pulses by Backward Raman Amplification

Description: Inverse bremsstrahlung absorption of the pump laser beam in a backward Raman amplifier over the round-trip light transit time through the sub-critical density plasma can more than double the electron temperature of the plasma and produce time-varying axial temperature gradients. The resulting increased Landau damping of the plasma wave and detuning of the resonance can act to stabilize the pump against unwanted amplification of Langmuir noise without disrupting nonlinear amplification of the fe… more
Date: November 6, 2003
Creator: Berger, Richard L.; Solodov, Daniel S. Clark Andrei; Valeo, Ernest J. & Fisch, Nathaniel J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Operating Regime for a Backward Raman Laser Amplifier in Preformed Plasma

Description: A critical issue in the generation of ultra-intense, ultra-short laser pulses by backward Raman scattering in plasma is the stability of the pumping pulse to premature backscatter from thermal fluctuations in the preformed plasma. Malkin et al. [V.M. Malkin, et al., Phys. Rev. Lett. 84 (6):1208-1211, 2000] demonstrated that density gradients may be used to detune the Raman resonance in such a way that backscatter of the pump from thermal noise can be stabilized while useful Raman amplification … more
Date: February 6, 2003
Creator: Clark, Daniel S. & Fisch, Nathaniel J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cutting Costs by Locating High Production Wells: A Test of the Volcano seismic Approach to Finding ''Blind'' Resources

Description: In the summer of 2000, Duke University and the Kenyan power generation company, KenGen, conducted a microearthquake monitoring experiment at Longonot volcano in Kenya. Longonot is one of several major late Quaternary trachyte volcanoes in the Kenya Rift. They study was aimed at developing seismic methods for locating buried hydrothermal areas in the Rift on the basis of their microearthquake activity and wave propagation effects. A comparison of microearthquake records from 4.5 Hz, 2 Hz, and br… more
Date: June 6, 2002
Creator: Shalev, Eylon; Malin, Peter E. & McCausland, Wendy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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