Ablation front Rayleigh-Taylor instability experiments in indirect drive at Phebus facility

2001 ◽  
Author(s):  
Andre L. Richard ◽  
B. Meyer ◽  
P. Salvatore ◽  
Philippe Troussel ◽  
Pascal Munsch ◽  
...  
Keyword(s):  
Taylor Instability ◽  
Indirect Drive ◽  
Rayleigh Taylor Instability ◽  
Ablation Front

scholarly journals Influence of ablation-to-critical surface distance upon Rayleigh–Taylor instability

1991 ◽  
Vol 9 (2) ◽  
pp. 273-281 ◽  
Author(s):  
J. Sanz ◽  
A. Estevez
Keyword(s):  
Growth Rate ◽  
Taylor Instability ◽  
Slab Thickness ◽  
Critical Surface ◽  
Slab Model ◽  
Surface Distance ◽  
Wave Numbers ◽  
Instability Growth ◽  
Rayleigh Taylor Instability ◽  
Ablation Front

The Rayleigh—Taylor instability is studied by means of a slab model and when slab thickness D is comparable to the ablation-to-critical surface distance. Under these conditions the perturbations originating at the ablation front reach the critical surface, and in order to determine the instability growth rate, we must impose boundary conditions at the corona. Stabilization occurs for perturbation wave numbers such that kD ˜ 10.

Dynamic stabilization of Rayleigh–Taylor instability in an ablation front

2011 ◽  
Vol 18 (1) ◽  
pp. 012702 ◽  
Author(s):  
A. R. Piriz ◽  
L. Di Lucchio ◽  
G. Rodriguez Prieto
Keyword(s):  
Dynamic Stabilization ◽  
Taylor Instability ◽  
Rayleigh Taylor Instability ◽  
Ablation Front

scholarly journals Probing the deep nonlinear stage of the ablative Rayleigh-Taylor instability in indirect drive experiments on the National Ignition Facilitya)

2015 ◽  
Vol 22 (5) ◽  
pp. 056302 ◽  
Author(s):  
A. Casner ◽  
L. Masse ◽  
S. Liberatore ◽  
P. Loiseau ◽  
P. E. Masson-Laborde ◽  
...  
Keyword(s):  
Taylor Instability ◽  
Nonlinear Stage ◽  
Indirect Drive ◽  
Rayleigh Taylor Instability

scholarly journals Experimental evidence of a bubble-merger regime for the Rayleigh-Taylor Instability at the ablation front

2016 ◽  
Vol 717 ◽  
pp. 012010 ◽  
Author(s):  
A Casner ◽  
S Liberatore ◽  
L Masse ◽  
D Martinez ◽  
S W Haan ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Taylor Instability ◽  
Rayleigh Taylor Instability ◽  
Ablation Front

Experimental analysis of indirect-drive ablative Rayleigh-Taylor instability on Shenguang Ⅱ

2015 ◽  
Vol 27 (3) ◽  
pp. 32009
Author(s):  
吴俊峰 Wu Junfeng ◽  
缪文勇 Miao Wenyong ◽  
王立锋 Wang Lifeng ◽  
曹柱荣 Cao Zhurong ◽  
郁晓瑾 Yu Xiaojin ◽  
...  
Keyword(s):  
Experimental Analysis ◽  
Taylor Instability ◽  
Indirect Drive ◽  
Rayleigh Taylor Instability

Weakly nonlinear ablative Rayleigh–Taylor instability at preheated ablation front

2009 ◽  
Vol 16 (10) ◽  
pp. 102104 ◽  
Author(s):  
Zhengfeng Fan ◽  
Jisheng Luo ◽  
Wenhua Ye
Keyword(s):  
Taylor Instability ◽  
Weakly Nonlinear ◽  
Rayleigh Taylor Instability ◽  
Ablation Front

scholarly journals Slab model for Rayleigh–Taylor instability

1996 ◽  
Vol 14 (3) ◽  
pp. 449-471
Author(s):  
A. Estévez
Keyword(s):  
Growth Rate ◽  
Heat Conduction ◽  
Inertial Confinement Fusion ◽  
Taylor Instability ◽  
Slab Thickness ◽  
Inertial Confinement ◽  
Critical Surface ◽  
Slab Model ◽  
Rayleigh Taylor Instability ◽  
Ablation Front

A modelization of the Rayleigh–Taylor instability, in the context of inertial confinement fusion, is made by means of a planar slab model whose main features are a sharp ablation front separating the slab and the expanding corona, absorption of constant intensity laser light at a critical surface, profiles for background flow variables consistent with hydrodynamic equations, and heat conduction present in the expanding corona. A sharp ablation front assumption (density at the critical surface is much less than the slab density, ρc/ρs ≪ 1) supposes that the ablated mass is small, so the model is valid for thick targets. Two main regimes are modelized, subsonic and sonic absorption. The growth rate of the instability is obtained, and its variation with kD and kxc is studied (k = perturbation wavenumber; D = slab thickness; xc = ablation to critical surfaces distance). The model shows stabilization over the classical Rayleigh–Taylor growth rate (γ = √kg). The stabilization mechanism is based on heat conduction near the ablation front.

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