Three-dimensional simulations of Nova capsule implosion experiments

Conference · Wed Nov 01 04:00:00 EST 1995

OSTI ID:192467

Marinak, M M; Tipton, R E; Landen, O L ^[1]

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1. and others

Capsule implosion experiments carried out on the Nova laser are simulated with the three-dimensional HYDRA radiation hydrodynamics code. Simulations of ordered near single mode perturbations indicate that structures which evolve into round spikes can penetrate farthest into the hot spot. Bubble-shaped perturbations can burn through the capsule shell fastest, however, causing even more damage. Simulations of a capsule with multimode perturbations shows spike amplitudes evolving in good agreement with a saturation model during the deceleration phase. The presence of sizable low mode asymmetry, caused either by drive asymmetry or perturbations in the capsule shell, can dramatically affect the manner in which spikes approach the center of the hot spot. Three-dimensional coupling between the low mode shell perturbations intrinsic to Nova capsules and the drive asymmetry brings the simulated yields into closer agreement with the experimental values.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 192467
• Report Number(s): UCRL-JC--122333; CONF-951181--8; ON: DE96005396
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
INERTIAL CONFINEMENT
LASER IMPLOSIONS
LASER TARGETS
NOVA FACILITY
RAYLEIGH-TAYLOR INSTABILITY
THREE-DIMENSIONAL CALCULATIONS