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Electromagnetic dispersion characteristics of a high energy electron beam guided with an ion channel
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作者 Jixiong XIAO Zhong ZENG +2 位作者 Zhijiang WANG Donghui XIA Changhai LIU 《Plasma Science and Technology》 SCIE EI CAS CSCD 2017年第2期20-27,共8页
Taking self-fields into consideration, dispersion properties of two types of electromagnetic modes for a high energy electron beam guided with an ion channel are investigated by using the linear perturbation theory. T... Taking self-fields into consideration, dispersion properties of two types of electromagnetic modes for a high energy electron beam guided with an ion channel are investigated by using the linear perturbation theory. The dependences of the dispersion frequencies of electromagnetic waves on the electron beam radius, betatron frequency and boundary current are revealed. It is found that the electron beam radius and betatron frequency have different influences on the electromagnetic waves dispersion behavior by compared with the previous works. As the boundary current is taken into account, the TM modes will have two branches and a lowfrequency branch emerged as the new branch in strong ion channel case. This new branch has similar dispersion behavior to the betatron modes. For TE modes, there are two branches and they have different dispersion behaviors in strong ion channel case. However, in weak ion channel case, the dispersion behaviors for both of the low frequency and high frequency branches are similar. 展开更多
关键词 dispersion behavior electromagnetic eigenmodes betatron oscillation ion channel
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Effects of Boundary Current on Electromagnetic Dispersion Characteristics for a Relativistic Electron Beam
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作者 肖集雄 曾中 +2 位作者 夏冬辉 王之江 刘昌海 《Plasma Science and Technology》 SCIE EI CAS CSCD 2016年第1期51-57,共7页
With betatron oscillation characteristics of the electron beam and ion channel effect taken into account,dispersion characteristics of electrostatic modes and TM modes for a relativistic electron beam guided by ion ch... With betatron oscillation characteristics of the electron beam and ion channel effect taken into account,dispersion characteristics of electrostatic modes and TM modes for a relativistic electron beam guided by ion channel are studied.Dispersion relations are derived and solved numerically to investigate the dependence of the dispersion characteristics for electrostatic modes and TM modes on the betatron oscillation frequency and the ratio of the relativistic electron beam radius to the waveguide radius.The effects of the boundary current on the dispersion characteristic of the TM modes and the interaction between the betatron modes and TM modes are analyzed.When considering the boundary current,for a strong ion channel,a new low-frequency branch of the TM modes arises and the interaction frequency between the betatron modes and the TM01modes is increased with the same parameters. 展开更多
关键词 dispersion characteristics electromagnetic eigenmodes betatron oscillation ion channel
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