Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects

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	Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects
	Fujioka, S ; Yamamoto, N ; Salzmann, D ; Wang, F ; Li, Y ; Dong, Q ; Wang, S ; Zhang, Y ; Rhee, YJ ; Lee, YW ; Han, JM ; Kwon, DH ; Zhong, J ; Zhao, G ; Tanabe, M ; Fujiwara, T ; Nakabayashi, Y ; Zhang, J ; Nishimura, H ; Takabe, H ; Mima, K
刊名	PLASMA PHYSICS AND CONTROLLED FUSION
	2009
卷号	51 期号:12
关键词	X-RAY SOURCES VELA X-1 LINE EMISSION LASER-FUSION STELLAR WIND Z-PINCHES CYGNUS-X-3 FACILITY SPECTRA MODEL
ISSN号	0741-3335
通讯作者	Fujioka, S: Osaka Univ, Inst Laser Engn, 2-6 Yamada Oka, Suita, Osaka 5650871, Japan.
中文摘要	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 kiloelectronvolts 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 well-characterized 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. The emerging x-rays irradiate a low-density (n(e) < 10(20) cm(-3)) and low- temperature (T(e) < 30 eV) silicon plasma. Line emissions from lithium- and helium-like silicon ions were observed from a thermally cold silicon plasma in the 1.8-1.9 keV spectral region, far from equilibrium conditions. This result reveals the laboratory generation of a photoionizing plasma. Atomic kinetic calculations imply the importance of direct K-shell photoionization by incoming hard x-rays.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40539]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Fujioka, S,Yamamoto, N,Salzmann, D,et al. Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2009,51(12).
APA	Fujioka, S.,Yamamoto, N.,Salzmann, D.,Wang, F.,Li, Y.,...&Mima, K.(2009).Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects.PLASMA PHYSICS AND CONTROLLED FUSION,51(12).
MLA	Fujioka, S,et al."Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects".PLASMA PHYSICS AND CONTROLLED FUSION 51.12(2009).