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arXiv physics/0410210physics.plasm-ph
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热平衡等离子体中多离子种效应对磁声波和能量传递的影响

Multi-ion-species effects on magnetosonic waves and energy transfer in thermal equilibrium plasmas

Mieko Toida, Takashi Yoshiya, Yukiharu Ohsawa

摘要:

研究了垂直于外磁场传播的磁声波,并考虑了多离子种类的影响。首先,数值计算了热平衡等离子体中磁场涨落的功率谱和自相关函数。在多离子种类等离子体中,除了$ω\simeq kv_{\rm A}$模式之外,在许多不同的离子回旋频率附近存在许多波。由于这些波的相位混合,由这些波组成的准模的自相关函数不能恢复到其初始值。其次,用粒子模拟方法研究了宏观垂直扰动的演化。在多离子种类等离子体中,这种扰动被阻尼。能量从磁场转移到离子。

英文摘要:

Magnetosonic waves propagating perpendicular to an external magnetic field are studied with attention to the effect of multiple ion species. First, power spectra of magnetic field fluctuations and autocorrelation functions in thermal equilibrium plasmas are numerically obtained. In a multi-ion-species plasma, besides $ω\simeq kv_{\rm A}$ mode, numerous waves are present near many different ion cyclotron frequencies. The autocorrelation function of the quasi-mode consisting of these waves is not recovered to its initial value, owing to the phase mixing of these waves. Next, with particle simulations, evolution of a macroscopic perpendicular disturbance is investigated. In a multi-ion-species plasma, this disturbance is damped. The energy is transferred to from the magnetic field to the ions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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