Cherenkov radiation with arbitrary azimuthal mode number excited in a plasma-filled slow-wave waveguide |
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Authors: | Jianqiang Wu Shenggang Liu Yuanlong Mo |
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Affiliation: | (1) High Energy Electronics Institute, University Electronic Science and Technology of China, 610054 Chengdu, Sichuan, China |
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Abstract: | On the basis of the reference [1], excitation of Cherenkov radiation with arbitrary azimuthal mode number by a thin annular relativistic electron beam in a plasma-filled dielectric-lined slow-wave waveguide is studied in this paper. A determinantal dispersion equation is obtained. This general dispersion equation is valid for arbitrary azimuthal mode number, and the growth rate of the wave is derived from it. Finally, the effects of the background plasma density on the dispersion relation, the background plasma density and the electron beam radius on the growth rate of the wave are presented. Formulas and results offerd in this paper are general, and are of particular value of reference to the beam-wave interaction in azimuthally unsymmetrical slow-wave waveguide.This work is supported by National Natural Science Foundation of China and 863 Project. |
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Keywords: | Cherenkov radiation arbitrary azimuthal mode number plasmafilled slow-wave waveguide general dispersion equation wave growth rate |
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