2011 Fiscal Year Final Research Report
Study of non-LTE photoionized plasma generated by laser-produced keV blackbody radiator
| Project/Area Number |
21684034
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Plasma science
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| Research Institution | Osaka University |
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Principal Investigator |
FUJIOKA Shinsuke 大阪大学, レーザーエネルギー学研究センター, 准教授 (40372635)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 光電離プラズマ / 黒体放射光源 / 高出力レーザー / レーザー生成プラズマ / 実験室宇宙物理 / X線天文学 |
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| Research Abstract |
Photoionized plasmas are encountered in astrophysics wherever low temperature gas/ plasma is bathed in a strong radiation field. X-ray line emissions in the several keV spectral range were observed from accreting clouds of binary systems, such as CYGNUS X-3 and VELA X-1, in which high-intensity x-ray continua from compact objects(neutron stars, black holes or white dwarfs) irradiate the cold and rarefied clouds. X-ray continuum-induced line emission accurately describes the accreting clouds, but experimental verification of this photoionized plasma model is scarce. Here we report the generation of photoionized plasmas in the laboratory under wellcharacterized conditions using a high-power laser. A blackbody radiator at a temperature of 500 eV, corresponding to a compact object, was created by means of a laser-driven implosion. Atomic kinetic calculations imply the importance of direct K-shell photoionization by incoming hard x-rays.
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[Journal Article] レーザー爆縮法によるkeV黒体放射場の形成と天体模擬光電離プラズマの生成2010
Author(s)
山本則正, 藤岡慎介, 西村博明, SALZMANN David W., WANG Feilu, LI Yutong, WANG Shoujun, ZHANG Yi, RHEE Yong-Joo, LEE Yong-Woo, ZHANG Jie, 村上泉, 加藤太治, 三間國興, 高部英明
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Journal Title
プラズマ核融合学会誌
Volume: Vol.87, No.2
Pages: 112-117
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[Journal Article] Characteristic measurements of silicon dioxide aerogel plasmas generated in a Planckian radiation environment2010
Author(s)
Q-L Dong, S-J Wang, Y-T Li, Y. Zhang, J. Zhao, H-G Wei, J-R Shi, G. Zhao, J-Y Zhang, Y-Q Gu, Y-K Ding, T-S Wen, W-H Zhang, X. Hu, S-Y Liu, L. Zhang, Y-J Tang, B-H. Zhang, Z-J Zheng, H. Nishimura, S. Fujioka, F-L Wang, H. Takabe, and J. Zhang
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Journal Title
Physics of Plasmas
Volume: Vol.17
Pages: 012701-1-7
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[Journal Article] Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects2009
Author(s)
S. Fujioka, N. Yamamoto, D. Salzmann, F. Wang, Y. Li, Q. Dong, S. Wang, Y. Zhang, Y-J. Rhee, Y-W. Lee, J-M. Han, D-H. Kwon, J. Zhong, G. Zhao, M. Tanabe, T. Fujiwara, Y. Nakabayashi, J. Zhang, H. Nishimura, H. Takabe, K. Mima
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Journal Title
Plasma Physics and Controlled Fusion
Volume: Vol.51
Pages: 124032
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[Journal Article] X-ray astronomy in the laboratory with a miniature compact object produced by laser-driven implosion2009
Author(s)
S. Fujioka, H. Takabe, N. Yamamoto, D. Salzmann, F. Wang, H. Nishimura, Y. Li, Q. Dong, S. Wang, Y. Zhang, Y-J. Rhee, Y-W. Lee, J-M. Han, M. Tanabe, T. Fujiwara, Y. Nakabayashi, G. Zhao, J. Zhang, K.
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Journal Title
Mima, Nature Physics
Volume: Vol.5
Pages: 821-825
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