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Model experiment of magnetic field amplification in laser-produced plasmas via the Richtmyer-Meshkov instability

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  • Y. Kuramitsu
  • N. Ohnishi
  • Y. Sakawa
  • T. Morita
  • H. Tanji
  • T. Ide
  • K. Nishio
  • J. N. Waugh
  • N. Booth
  • R. Heathcote
  • G. Gregori
  • J. Smallcombe
  • A. Dizière
  • M. Koenig
  • Y. Matsumoto
  • A. Mizuta
  • T. Sugiyama
  • S. Matsukiyo
  • T. Moritaka
  • T. Sano
  • H. Takabe


Publication details

JournalPhysics of Plasmas
DateAccepted/In press - 15 Mar 2016
DatePublished (current) - 30 Mar 2016
Issue number3
Number of pages6
Original languageEnglish


A model experiment of magnetic field amplification (MFA) via the Richtmyer-Meshkov instability (RMI) in supernova remnants (SNRs) was performed using a high-power laser. In order to account for very-fast acceleration of cosmic rays observed in SNRs, it is considered that the magnetic field has to be amplified by orders of magnitude from its background level. A possible mechanism for the MFA in SNRs is stretching and mixing of the magnetic field via the RMI when shock waves pass through dense molecular clouds in interstellar media. In order to model the astrophysical phenomenon in laboratories, there are three necessary factors for the RMI to be operative: a shock wave, an external magnetic field, and density inhomogeneity. By irradiating a double-foil target with several laser beams with focal spot displacement under influence of an external magnetic field, shock waves were excited and passed through the density inhomogeneity. Radiative hydrodynamic simulations show that the RMI evolves as the density inhomogeneity is shocked, resulting in higher MFA.

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© 2016, AIP Publishing LLC. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

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