Ablation front Rayleigh-Taylor growth experiments in spherically convergent geometry

Journal Article · Mon May 01 00:00:00 EDT 2000 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.874024· OSTI ID:20216067

Glendinning, S G ^[1]; Colvin, J ^[1]; Haan, S ^[1]; Kalantar, D H ^[1]; Landen, O L ^[1]; Marinak, M M ^[1]; Remington, B A ^[1]; Wallace, R ^[1]; Cherfils, C ^[2]; Dague, N ^[2]

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1. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States)
2. Commissariat a l'Energie Atomique-Direction des Applications Militaire Ile de France, BP 12, 91680 Bruyeres le Chatel, (France)

Experiments were performed on the Nova laser [E. M. Campbell et al., Rev. Sci. Instrum. 57, 2101 (1986)], using indirectly driven capsules mounted in cylindrical gold hohlraums, to measure the Rayleigh-Taylor growth at the ablation front by time-resolved radiography. Modulations were preformed on the surface of Ge-doped plastic capsules. With initial modulation amplitude of 2-2.5 {mu}m, growth factors of about six in optical depth were seen, in agreement with simulations using the radiation hydrocode FCI2 [G. Schurtz, La fusion thermonucleaire inertielle par laser, edited by R. Dautray et al. (Eyrolles, Paris, 1994), Vol. 2]. With initial modulation amplitude of 0.5 {mu}m and a longer drive, growth factors of about 100-150 in optical depth were seen. Comparable planar experiments showed growth factors of about 40 in optical depth. Analytical models predict the observed growth factors. (c) 2000 American Institute of Physics.

• OSTI ID: 20216067
• Journal Information: Physics of Plasmas, Vol. 7, Issue 5; Other Information: PBD: May 2000; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABLATION
LASER TARGETS
NOVA FACILITY
RAYLEIGH-TAYLOR INSTABILITY
GOLD
GROWTH
PLASMA SIMULATION
LASER-PRODUCED PLASMA
EXPERIMENTAL DATA