有限磁场作用下等离子体背景中的切伦可夫不稳定性研究
Study of Cherenkov instability for a plasma immersed waveguide in a finite magnetic field
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摘要: 较高密度的相对论电子束注入等离子体中将会形成离子通道，在考虑了离子通道的影响下，推导出圆柱波导中更普遍的色散方程，并计算出考虑离子通道和不考虑离子通道效应时的色散关系及电磁波的增长率。Abstract: When an electron beam is injected into plasma, an ionchannel might form if the beam density is relatively high. A dispersion equation of a circular cylindrical waveguide with the ionchannel taken into account is given in this paper. The properties of dispersion and wave growth rates have also been discussed for two cases, one is that the ionchannel was taken into account, and the other is that the ionchannel was neglected.
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Key words:
- a finite magnetic field /
- ionchannel /
- dispersion equation /
- wave growth rate
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