Enhancement of Ablative Rayleigh-Taylor Instability Growth by Thermal Conduction Suppression in a Magnetic Field

Kazuki Matsuo, Takayoshi Sano, Hideo Nagatomo, Toshihiro Somekawa, King Fai Farley Law, Hiroki Morita, Yasunobu Arikawa, and Shinsuke Fujioka
Phys. Rev. Lett. 127, 165001 – Published 12 October 2021

Abstract

Ablative Rayleigh-Taylor instability growth was investigated to elucidate the fundamental physics of thermal conduction suppression in a magnetic field. Experiments found that unstable modulation growth is faster in an external magnetic field. This result was reproduced by a magnetohydrodynamic simulation based on a Braginskii model of electron thermal transport. An external magnetic field reduces the electron thermal conduction across the magnetic field lines because the Larmor radius of the thermal electrons in the field is much shorter than the temperature scale length. Thermal conduction suppression leads to spatially nonuniform pressure and reduced thermal ablative stabilization, which in turn increases the growth of ablative Rayleigh-Taylor instability.

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  • Received 15 June 2021
  • Revised 6 September 2021
  • Accepted 21 September 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.165001

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

Kazuki Matsuo1,*, Takayoshi Sano1,†, Hideo Nagatomo1, Toshihiro Somekawa1,2, King Fai Farley Law1, Hiroki Morita1, Yasunobu Arikawa1, and Shinsuke Fujioka1,‡

  • 1Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
  • 2Institute for Laser Technology, 1-8-4 Utsubo-honmachi, Nishi-ku Osaka, Osaka 550-0004, Japan

  • *matsuo-k@ile.osaka-u.ac.jp
  • sano@ile.osaka-u.ac.jp
  • sfujioka@ile.osaka-u.ac.jp

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Issue

Vol. 127, Iss. 16 — 15 October 2021

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