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Chin. Phys. B, 2008, Vol. 17(10): 3807-3811    DOI: 10.1088/1674-1056/17/10/045

Comparative research on three types of coaxial slow wave structures

Xiao Ren-Zhen(肖仁珍), Liu Guo-Zhi(刘国治), and Chen Chang-Hua(陈昌华)
Northwest Institute of Nuclear Technology, Xi'an { rm 710024, China
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.
Keywords:  relativistic Cerenkov generator      coaxial slow wave structure      dispersion characteristics      particle-in-cell simulation  
Received:  04 December 2007      Revised:  22 February 2008      Accepted manuscript online: 
PACS:  84.40.-x (Radiowave and microwave (including millimeter wave) technology)  
  52.65.Rr (Particle-in-cell method)  

Cite this article: 

Xiao Ren-Zhen(肖仁珍), Liu Guo-Zhi(刘国治), and Chen Chang-Hua(陈昌华) Comparative research on three types of coaxial slow wave structures 2008 Chin. Phys. B 17 3807

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