High-Mach number collisionless shock and photo-ionized non-LTE plasma for laboratory astrophysics with intense lasers

H. Takabe, T. N. Kato, Y. Sakawa, Y. Kuramitsu, T. Morita, T. Kadono, K. Shigemori, K. Otani, H. Nagatomo, T. Norimatsu, S. Dono, T. Endo, K. Miyanishi, T. Kimura, A. Shiroshita, N. Ozaki, R. Kodama, S. Fujioka, H. Nishimura, D. SalzmanB. Loupias, C. Gregory, M. Koenig, J. N. Waugh, N. C. Woolsey, D. Kato, Y. T. Li, Q. L. Dong, S. J. Wang, Y. Zhang, J. Zhao, F. L. Wang, H. G. Wei, J. R. Shi, G. Zhao, J. Y. Zhang, T. S. Wen, W. H. Zhang, X. Hu, S. Y. Liu, Y. K. Ding, L. Zhang, Y. J. Tang, B. H. Zhang, Z. J. Zheng, Z. M. Sheng, J. Zhang

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Abstract

We propose that most of the collisionless shocks in the Universe, for example, supernova remnant shocks, are produced because of the magnetic field generated by Weibel instability and its nonlinear process. In order to verify and validate the computational result confirming this theory, we are carrying out model experiments with intense lasers. We are going to make a collisionless counter-streaming plasma with intense laser ablation based on the scaling law to laser plasma with the particle-in-cell simulation resulting in Weibel-mediated shock formation. Preliminary experimental data are shown. The photo-ionization and resultant non-LTE plasma physics are also very important subjects in astrophysics related to mainly compact objects, for example, black hole, neutron star and white dwarf. Planckian radiation with its temperature 80-100 eV has been produced in gold cavity with irradiation of intense lasers inside the cavity. The sample materials are irradiated by the radiation inside the cavity and absorption and self-emission spectra are observed and analyzed theoretically. It is demonstrated how the effect of non-LTE is essential to reproduce the experimental spectra with the use of a precision computational code.

Original languageEnglish
Article number124057
JournalPlasma Physics and Controlled Fusion
Volume50
Issue number12
DOIs
Publication statusPublished - 2008

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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    Takabe, H., Kato, T. N., Sakawa, Y., Kuramitsu, Y., Morita, T., Kadono, T., Shigemori, K., Otani, K., Nagatomo, H., Norimatsu, T., Dono, S., Endo, T., Miyanishi, K., Kimura, T., Shiroshita, A., Ozaki, N., Kodama, R., Fujioka, S., Nishimura, H., ... Zhang, J. (2008). High-Mach number collisionless shock and photo-ionized non-LTE plasma for laboratory astrophysics with intense lasers. Plasma Physics and Controlled Fusion, 50(12), [124057]. https://doi.org/10.1088/0741-3335/50/12/124057