Scaling laws of the Rayleigh-Taylor ablation front mixing zone evolution in inertial confinement fusion

Dan Oron, U. Alon, D. Shvarts

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A theoretical model for the ablatively driven Rayleigh-Taylor (RT) instability single-mode and multimode mixing fronts is presented. The effect of ablation is approximately included in a Layzer-type potential flow model, yielding the description of both the single-mode evolution and the two-bubble nonlinear competition. The reduction factor of the linear growth rate due to ablative stabilization obtained by the model is similar to the Takabe formula. The single-bubble terminal velocity is found to be similarly reduced by ablation, in good agreement with numerical simulations. Two-bubble competition is calculated, and a statistical mechanics model for multimode fronts is presented. The asymptotic ablation correction to the classical RT αgt2 mixing zone growth law is derived. The effect of ablative stabilization on the allowed in-flight aspect ratio of inertial confinement fusion pellets is estimated using the results of the statistical mechanics model.

Original languageEnglish
Pages (from-to)1467-1476
Number of pages10
JournalPhysics of Plasmas
Volume5
Issue number5 PART 1
Publication statusPublished - 1998

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inertial confinement fusion
scaling laws
ablation
bubbles
statistical mechanics
stabilization
terminal velocity
potential flow
Taylor instability
pellets
aspect ratio
flight
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Scaling laws of the Rayleigh-Taylor ablation front mixing zone evolution in inertial confinement fusion. / Oron, Dan; Alon, U.; Shvarts, D.

In: Physics of Plasmas, Vol. 5, No. 5 PART 1, 1998, p. 1467-1476.

Research output: Contribution to journalArticle

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