The characteristics of ion acoustic solitons in non-Maxwellian plasmas

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题名:	The characteristics of ion acoustic solitons in non-Maxwellian plasmas
作者:	Chuang,SH;Hau,LN
贡献者:	太空科學研究所
关键词:	ELECTROSTATIC SOLITARY STRUCTURES;LOWER-HYBRID WAVES;DENSITY DEPLETIONS;NONTHERMAL PLASMAS;AURORAL PLASMA;FREJA;DISTRIBUTIONS;SPACECRAFT;AMPLITUDE;ELECTRONS
日期:	2009
上传时间:	2010-06-29 18:38:11 (UTC+8)
出版者:	中央大學
摘要:	Ion acoustic solitons may be associated with the electrostatic solitary structures observed in the space plasma environment. Earlier models describing these solutions assume Maxwellian distribution for electrons imbedded in the fluid ions and predict enhanced density that have difficulty in explaining some of the observed features of depleted density associated with electrostatic solitons. Improved models incorporating nonthermal electrons are shown to be able to produce solitary structures with depleted density [R. A. Cairns , Geophys. Res. Lett. 22, 2709 (1995)]. In this paper general solutions of ion acoustic solitons are derived for which the electrons are modeled by the kappa distribution characterized by the kappa parameter that has been found to well represent the particle distribution observed in space plasmas. It is shown that solitary structures with depleted density are unlikely to exist in non-Maxwellian plasmas with general kappa distribution. Detailed comparisons are made of the solutions based on Cairns et al. and kappa velocity distributions.
關聯:	PHYSICS OF PLASMAS
显示于类别:	[太空科學研究所 ] 期刊論文

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