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

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Abstract

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.

Original languageEnglish
Pages (from-to)269-272
Number of pages4
JournalAstrophysics and Space Science
Volume336
Issue number1
DOIs
Publication statusPublished - Nov 1 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Kuramitsu, Y., Sakawa, Y., Morita, T., Dono, S., Aoki, H., Tanji, H., Gregory, C. D., Waugh, J. N., Loupias, B., Koenig, M., Woolsey, N., Ide, T., Sano, T., & Takabe, H. (2011). Formation of density inhomogeneity in laser produced plasmas for a test bed of magnetic field amplification in supernova remnants. Astrophysics and Space Science, 336(1), 269-272. https://doi.org/10.1007/s10509-010-0568-7