On a statistical scattering model to explain capsule implosion symmetry in vacuum Hohlraums with radiation temperatures of order 100 eV

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Journal of Physics

OSTI ID:971650

Goldman, Sanford R ^[1]; Kyrala, George A ^[1]; Dodd, Evan S ^[1]; Grondalski, John P ^[1]; Hoffman, Nelson M ^[1]; Rose, Harvey A ^[1]; Seifter, Achim ^[1]

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1. Los Alamos National Laboratory

We apply a statistical scattering model of laser ray propagation to obtain improved agreement with measurements for capsule emission symmetry in one of three sets of experiments. Linearized post-processing of the simulations for amplification of a variety of plasma instabilities, coupled with an accounting for intensity seed perturbations in the laser beams suggests that thermal filamentation can cause the density fluctuations. Although this mechanism does not appear to be significant in the remaining two series, its identification adds to the knowledge base in the use of symmetry capsules to measure hohlraum drive asymmetry.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 971650
• Report Number(s): LA-UR-09-06448; LA-UR-09-6448; TRN: US1001229
• Journal Information: Journal of Physics, Journal Name: Journal of Physics
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLIFICATION
ASYMMETRY
FLUCTUATIONS
IMPLOSIONS
KNOWLEDGE BASE
LASERS
PLASMA
RADIATIONS
SCATTERING
SEEDS
SYMMETRY