Formation of density inhomogeneity in laser produced plasmas for a test bed of magnetic field amplification in supernova remnants

Y. Kuramitsu, Y. Sakawa, T. Morita, S. Dono, H. Aoki, H. Tanji, C. D. Gregory, J. N. Waugh, B. Loupias, M. Koenig, N. Woolsey, T. Ide, T. Sano, H. Takabe

研究成果: Contribution to journalArticle査読

9 被引用数 (Scopus)

抄録

Density inhomogeneities for a test bed of magnetic field amplification in supernova remnants (SNRs) were created in laser produced plasmas. The density inhomogeneity is considered to be essential to the large magnetic field amplification to account for the very fast cosmic ray acceleration. In order to model the density variations about an order of magnitude in an interstellar medium, we performed three types of experiments using a high-power laser system: (1) irradiating a plastic (CH) plane with a single focal spot beams, (2) the same target with spatial separation of laser focal spots, and (3) irradiating a striped target of thin and thick CH plane. By irradiating a CH plane target with a single focal spot laser beams, a plasma plume was produced with the large density range. On the other hand, when the several laser beams with displacements of the focal spots, bumpy structures of electron density were produced. Making thin stripes on a CH plane target, density and velocity inhomogeneities were produced by irradiating the striped target with the laser beams. In the all methods the density variations were very large, which can be used for a model experiment of the magnetic field amplification.

本文言語英語
ページ(範囲)269-272
ページ数4
ジャーナルAstrophysics and Space Science
336
1
DOI
出版ステータス出版済み - 11 2011
外部発表はい

All Science Journal Classification (ASJC) codes

  • 天文学と天体物理学
  • 宇宙惑星科学

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