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106 / 2026-03-30 15:14:47
Revisit two-mode couplings of the ablative Rayleigh-Taylor instability in inertial confinement fusion
inertial confinement fusion, ablative Rayleigh-Taylor instability, mode coupling
Laser and Particle Beam Fusion, Magnetic Driven Fusion > Laser Fusion Physics
Abstract Accepted
贤 姜 / 中国科学技术大学
锐 闫 / 中国科学技术大学
德华 张 / 中国科学技术大学
Two-dimensional two-mode couplings of the ablative Rayleigh-Taylor instability (ARTI) under inertial-confinement-fusion (ICF) relevant parameters are revisited via numerical simulations, with a focus on the regimes where the wavenumbers of the initial modes are close to the cutoff wavenumber. In the quasi-linear stage in which the generated modes approximately grow exponentially with time, both the self-growth of the generated mode (as if in the single-mode regime) and the driven-growth due to mode couplings are found to be important. A series of linearly unstable modes are found to be generated by coupling of two linearly stable initial modes, and then compete for the dominant mode according to a proposed criterion. A model including the contribution of both the self-growth and the driven-growth with an empirically modified coupling coefficient is proposed and shown to accurately predict the growth of the generated mode. The findings have implications for assessing the impact of ARTI in ICF designs.

 
Important Date

  • May 12

    2026

    Conference Date

  • Apr 15 2026

    Draft paper submission deadline

  • May 12 2026

    Registration deadline

Sponsored By
National Key Laboratory of Plasma Physics, Laser Fusion Research Center, China Academy of Engineering Physics
Xiamen University
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