Comparative research on three types of coaxial slow wave structures |
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Authors: | Xiao Ren-Zhen Liu Guo-Zhi and Chen Chang-Hua |
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Institution: | Northwest Institute of Nuclear Technology, Xi'an { rm
710024, China |
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Abstract: | This paper studies three types of coaxial slow wave structures
(SWSs): (1) with ripples on both the inner and outer conductors; (2)
with ripples on the outer conductor and smooth on the inner one; and
(3) with ripples on the inner conductor and smooth on the outer one.
The frequencies, coupling impedances, time growth rates and
beam-wave interaction efficiencies of the three types of coaxial
SWSs are obtained by theoretical analysis. Moreover, the
relativistic Cerenkov generators (RCGs) with the three types of
coaxial SWSs are simulated with a fully electromagnetic
particle-in-cell code, and the results verify the theoretical
analysis. It is proved that the RCG with double-rippled coaxial SWS
has the highest conversion efficiency and the shortest starting
time. |
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Keywords: | relativistic Cerenkov generator coaxial slow wave structure dispersion characteristics particle-in-cell simulation |
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