Design and optimization of a 2 MeV X-band side-coupled accelerating structure  

作　　者：Yuan Hao-Wei Hou Mi Gao Bin 

机构地区：[1]Laboratory of Particle Acceleration Physics&Technology,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]University of Chinese Academy of Science,Beijing 100049,China

出　　处：《Radiation Detection Technology and Methods》2017年第2期9-14,共6页辐射探测技术与方法（英文）

基　　金：Supported by National Natural Science Foundation of China(11275222).

摘　　要：Purpose As the development of smaller accelerators technique,an X-band bi-period side-coupled accelerating structure has been designed for medical use.Methods The structure’s working frequency is 9.3 GHz.π/2 mode is chosen for the structure’s stability.There are 11 accelerating cells and 10 coupling cells,the first 5 of the accelerating cells work as non-light velocity part(βof the electron from 0.17 to 0.94),while the other 6 work as light velocity part.After CST simulation,the coupling constant between accelerating cells and coupling cells is 5%,and effi-cient shunt impedance is 142 MΩ/m.To feed power into the structure,a coupler is designed in the middle of the structure and the coupling coefficient is 1.4.Results After optimization,the particle’s capture efficiency is more than 30%,the particle energy is 2 MeV and the peak current is 60 mA,with the magnetron’s input power being 0.32 MW.Conclusion X-band side-coupled accelerator efficiency is high and is a more optimized design.This design is very meaningful for the development of smaller accelerators technique.

关 键 词：Side-coupled structure X-BAND High gratitude Tuning of microwave 

分 类 号：TL5[核科学技术—核技术及应用]