Implementation of a high energy 4ω probe beam on the Omega laser

2004 ◽  
Vol 75 (10) ◽  
pp. 3906-3908 ◽  
Author(s):  
A. J. Mackinnon ◽  
S. Shiromizu ◽  
G. Antonini ◽  
J. Auerbach ◽  
K. Haney ◽  
...  
Keyword(s):  
Probe Beam ◽  
High Energy ◽  
Omega Laser

scholarly journals Assessment of Model Confidence of a Laser Source Model in xRAGE Using Omega Direct-Drive Implosion Experiments

2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Brandon M. Wilson ◽  
Aaron Koskelo
Keyword(s):  
Energy Density ◽  
National Laboratory ◽  
High Energy ◽  
Source Model ◽  
High Energy Density ◽  
Laser Source ◽  
Direct Drive ◽  
High Energy Density Physics ◽  
Model Confidence ◽  
Omega Laser

Los Alamos National Laboratory is interested in developing high-energy-density physics validation capabilities for its multiphysics code xRAGE. xRAGE was recently updated with the laser package Mazinisin to improve predictability. We assess the current implementation and coupling of the laser package via validation of laser-driven, direct-drive spherical capsule experiments from the Omega laser facility. The ASME V&V 20-2009 standard is used to determine the model confidence of xRAGE, and considerations for high-energy-density physics are identified. With current modeling capabilities in xRAGE, the model confidence is overwhelmed by significant systematic errors from the experiment or model. Validation evidence suggests cross-beam energy transfer as a dominant source of the systematic error.

A high-energy x-ray spectrometer diagnostic for the OMEGA laser

2002 ◽  
Vol 73 (6) ◽  
pp. 2270-2275 ◽  
Author(s):  
L. T. Hudson ◽  
A. Henins ◽  
R. D. Deslattes ◽  
J. F. Seely ◽  
G. E. Holland ◽  
...  
Keyword(s):  
High Energy ◽  
X Ray ◽  
Omega Laser

scholarly journals Microcoulomb (0.7 ± $$\frac{0.4}{0.2}$$ μC) laser plasma accelerator on OMEGA EP

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. L. Shaw ◽  
M. A. Romo-Gonzalez ◽  
N. Lemos ◽  
P. M. King ◽  
G. Bruhaug ◽  
...  
Keyword(s):  
Laser Plasma ◽  
Electron Beams ◽  
Laser Energy ◽  
Short Pulse ◽  
Lawrence Livermore National Laboratory ◽  
National Laboratory ◽  
High Energy ◽  
High Energy Density ◽  
X Ray ◽  
Omega Laser

AbstractLaser-plasma accelerators (LPAs) driven by picosecond-scale, kilojoule-class lasers can generate particle beams and x-ray sources that could be utilized in experiments driven by multi-kilojoule, high-energy-density science (HEDS) drivers such as the OMEGA laser at the Laboratory for Laser Energetics (LLE) or the National Ignition Facility at Lawrence Livermore National Laboratory. This paper reports on the development of the first LPA driven by a short-pulse, kilojoule-class laser (OMEGA EP) connected to a multi-kilojoule HEDS driver (OMEGA). In experiments, electron beams were produced with electron energies greater than 200 MeV, divergences as low as 32 mrad, charge greater than 700 nC, and conversion efficiencies from laser energy to electron energy up to 11%. The electron beam charge scales with both the normalized vector potential and plasma density. These electron beams show promise as a method to generate MeV-class radiography sources and improved-flux broadband x-ray sources at HEDS drivers.

High-Energy Petawatt Capability for the Omega Laser

2005 ◽  
Vol 16 (7) ◽  
pp. 30 ◽  
Author(s):  
L.J. Waxer ◽  
D.N. Maywar ◽  
J.H. Kelly ◽  
T.J. Kessler ◽  
B.E. Kruschwitz ◽  
...  
Keyword(s):  
High Energy ◽  
Omega Laser

scholarly journals Observation of a Kelvin-Helmholtz Instability in a High-Energy-Density Plasma on the Omega Laser

2009 ◽  
Vol 103 (4) ◽  
Author(s):  
E. C. Harding ◽  
J. F. Hansen ◽  
O. A. Hurricane ◽  
R. P. Drake ◽  
H. F. Robey ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Helmholtz Instability ◽  
Omega Laser ◽  
Density Plasma

scholarly journals Modulation above Pump Beam Energy in Photoreflectance

2017 ◽  
Vol 2017 ◽  
pp. 1-4 ◽  
Author(s):  
D. Fuertes Marrón
Keyword(s):  
Probe Beam ◽  
Critical Points ◽  
Pump Beam ◽  
Lower Energy ◽  
High Energy ◽  
Pump Light ◽  
Spectral Content ◽  
Bulk Gaas ◽  
Upper Limit ◽  
Set Up

Photoreflectance is used for the characterisation of semiconductor samples, usually by sweeping the monochromatized probe beam within the energy range comprised between the highest value set up by the pump beam and the lowest absorption threshold of the sample. There is, however, no fundamental upper limit for the probe beam other than the limited spectral content of the source and the responsivity of the detector. As long as the modulation mechanism behind photoreflectance does affect the complete electronic structure of the material under study, sweeping the probe beam towards higher energies from that of the pump source is equally effective in order to probe high-energy critical points. This fact, up to now largely overseen, is shown experimentally in this work. E1 and E0 + Δ0 critical points of bulk GaAs are unambiguously resolved using pump light of lower energy. This type of upstream modulation may widen further applications of the technique.

scholarly journals Validation of a Turbulent Kelvin-Helmholtz Shear Layer Model Using a High-Energy-Density OMEGA Laser Experiment

2012 ◽  
Vol 109 (15) ◽  
Author(s):  
O. A. Hurricane ◽  
V. A. Smalyuk ◽  
K. Raman ◽  
O. Schilling ◽  
J. F. Hansen ◽  
...  
Keyword(s):  
Energy Density ◽  
Shear Layer ◽  
High Energy ◽  
High Energy Density ◽  
Layer Model ◽  
Laser Experiment ◽  
Omega Laser

scholarly journals Note: Experimental platform for magnetized high-energy-density plasma studies at the omega laser facility

2015 ◽  
Vol 86 (1) ◽  
pp. 016105 ◽  
Author(s):  
G. Fiksel ◽  
A. Agliata ◽  
D. Barnak ◽  
G. Brent ◽  
P.-Y. Chang ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Experimental Platform ◽  
Laser Facility ◽  
Omega Laser ◽  
Density Plasma
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