Dynamic stabilization of Rayleigh-Taylor instability in an ablation front

Piriz, A. R.; Di Lucchio, L.; Rodriguez Prieto, G.
January 2011
Physics of Plasmas;Jan2011, Vol. 18 Issue 1, p012702
Academic Journal
Dynamic stabilization of Rayleigh-Taylor instability in an ablation front is studied by considering a modulation in the acceleration that consists of sequences of Dirac deltas. This allows obtaining explicit analytical expressions for the instability growth rate as well as for the boundaries of the stability region. As a general rule, it is found that it is possible to stabilize all wave numbers above a certain minimum value km, but the requirements in the modulation amplitude and frequency become more exigent with smaller km. The essential role of compressibility is phenomenologically addressed in order to find the constraint it imposes on the stability region. The results for some different wave forms of the acceleration modulation are also presented.


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