大阪大学 レーザーエネルギー学研究センター
大阪大学 レーザーエネルギー学研究センター
大阪大学 レーザーエネルギー学研究センター
核融合科学研究所
Chinese Academy of Sciences Institute of Physics
Chinese Academy of Sciences National Astronomical Observatories
Chinese Academy of Sciences Institute of Physics
大阪大学 レーザーエネルギー学研究センター
著者所属（英）
Osaka University Inst. of Laser Engineering
Osaka University Inst. of Laser Engineering
Osaka University Inst. of Laser Engineering
National Institute for Fusion Science
Chinese Academy of Sciences Institute of Physics
Chinese Academy of Sciences National Astronomical Observatories
Chinese Academy of Sciences Institute of Physics
Osaka University Institute of Laser Engineering
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
宇宙圏研究会高エネルギー宇宙物理連絡会,第8回研究会集録原稿:超新星とその残骸
雑誌名(英)
Proceedings of the 8th Workshop of High Energy AstroPhysics Association, Workshop for Space Astrophysics: Supernova and Its Remnant
ページ
173 - 173
発行年
2007-10-17
抄録（英）
The first experiment relevant to astrophysics has been done with intense laser to study the photoionized plasma with large-scale laser system Gekko-12. Independent measurement of the radiation flux indicates values of the ionization parameter xi is approximately 10 erg cm/s and Planckian radiation source of 80 eV to photoionize the nitrogen gas. The observed emission spectra of nitrogen of relatively low density (n(sub i) = 1.4 x 10(exp 19)/cu cm) shows a good agreement with the synthetic spectra by a time-dependent DCA (Detailed Configuration Accounting) atomic model. In this model, it solves the rate equations for level population distributions by considering collisional and radiative atomic processes based on screened hydrogenic model. The jj configuration atomic states and transition probabilities are calculated with HULLAC (Hebrew University Lawrence Livermore Atomic Code) to synthesize spectrum. With this model, we can obtain a reasonable range of the electron temperatures of 20-30 eV. We also show the similarity in spectrum between based on LTE (Local Thermodynamic Equilibrium) and non-LTE. In such case, the physics drastically changes even for the same spectra.
Experimental evidence and theoretical analysis of photoionized plasma under X-ray radiation produced by intense laser
