Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects

	Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects
	Fujioka, S.1; Yamamoto, N.1; Salzmann, D.1,2; Wang, F.2 ; Li, Y.3; Dong, Q.3; Wang, S.3; Zhang, Y.3; Rhee, Y-J 4; Lee, Y-W 4
刊名	PLASMA PHYSICS AND CONTROLLED FUSION
	2009-12-01
卷号	51 期号:12
英文摘要	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 ; ISTP
语种	英语
WOS记录号	WOS:000271940800043
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7585]
专题	国家天文台_光学天文研究部
作者单位	1.Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 1000190, Peoples R China 4.Korea Atom Energy Res Inst, Lab Quantum Opt, Taejon 305353, South Korea 5.Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
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).