Electromagnetic dispersion characteristics of a high energy electron beam guided with an ion channel

Jixiong XIAO (肖集雄); Zhong ZENG (曾中); Zhijiang WANG (王之江); Donghui XIA (夏冬辉); Changhai LIU (刘昌海)

doi:10.1088/2058-6272/19/2/024004

Plasma Science and Technology > 2017 > 19(2): 24004-024004. > DOI: 10.1088/2058-6272/19/2/024004

Jixiong XIAO (肖集雄), Zhong ZENG (曾中), Zhijiang WANG (王之江), Donghui XIA (夏冬辉), Changhai LIU (刘昌海). Electromagnetic dispersion characteristics of a high energy electron beam guided with an ion channel[J]. Plasma Science and Technology, 2017, 19(2): 24004-024004. DOI: 10.1088/2058-6272/19/2/024004

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Electromagnetic dispersion characteristics of a high energy electron beam guided with an ion channel

Institute of fusion and plasma research, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China

Funds: This work is supported by the National ITER project Foundation of China (Nos. 2013GB106001 and 2013GB106003).

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Received Date: June 30, 2016

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Abstract

Abstract

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 low-frequency 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.
- dispersion behavior,
- electromagnetic eigenmodes,
- betatron oscillation,
- ion channel

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References (28)

References

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