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

Y. Kuramitsu, N. Ohnishi, Y. Sakawa, T. Morita, H. Tanji, T. Ide, K. Nishio, C. D. Gregory, J. N. Waugh, N. Booth, R. Heathcote, C. Murphy, G. Gregori, J. Smallcombe, C. Barton, A. Dizière, M. Koenig, N. Woolsey, Y. Matsumoto, A. MizutaT. Sugiyama, S. Matsukiyo, T. Moritaka, T. Sano, H. Takabe

研究成果: Contribution to journalArticle

2 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号032126
ジャーナルPhysics of Plasmas
23
3
DOI
出版ステータス出版済み - 3 2016

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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