Kinetic theory on the current-filamentation instability in collisional plasmas

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	Kinetic theory on the current-filamentation instability in collisional plasmas
	Hao, B ; Sheng, ZM ; Zhang, J
刊名	PHYSICS OF PLASMAS
	2008
卷号	15 期号:8
关键词	WEIBEL INSTABILITY WAVES
ISSN号	1070-664X
通讯作者	Sheng, ZM: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China.
中文摘要	The current filamentation instability (CFI) or Weibel-type instability is studied for a nonrelativistic electron beam penetrating an infinite uniform plasma, taking into account both the collisional effects and the space-charge effect (SCE). We consider three configurations for the beam and plasma: the kinetic domain, the hydrodynamic domain, and the hybrid domain with one in kinetic and the other in hydrodynamic domain. It is shown that the CFI is determined by the current-driven drift-anisotropy rather than the classical anisotropy of the beam and the background plasma. Therefore, collisional effects can either attenuate or enhance the CFI, depending on the drift-anisotropy of the beam and the background plasma. It is found that the collisional effects usually attenuate the CFI for nearly symmetric counterstreaming in the whole unstable range but enhance it for asymmetric counterstreaming in the long wavelength region both in the kinetic and the hydrodynamic domains, although the mechanisms are different. As for the case of the hybrid domain the collisional effects enhance the CFI growth rate in the long wavelength region but reduce it in the short wavelength region. The SCE can be ignored for the hydrodynamic domain while for the kinetic and the hybrid domains it is still significant though damped by the collisional effects. The combination of the SCE and the collisional effects usually reduce the CFI growth rate and suppress the unstable range further, especially in the short wavelength region. (C) 2008 American Institute of Physics.
收录类别	SCI
资助信息	National Natural Science Foundation of China [10425416, 10674175, 60621063]; National High-Tech ICF Committee; National Basic Research Program of China [2007CB815101, 2007CB815105]
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/311004/40464]
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	Hao, B,Sheng, ZM,Zhang, J. Kinetic theory on the current-filamentation instability in collisional plasmas[J]. PHYSICS OF PLASMAS,2008,15(8).
APA	Hao, B,Sheng, ZM,&Zhang, J.(2008).Kinetic theory on the current-filamentation instability in collisional plasmas.PHYSICS OF PLASMAS,15(8).
MLA	Hao, B,et al."Kinetic theory on the current-filamentation instability in collisional plasmas".PHYSICS OF PLASMAS 15.8(2008).