Design optimization of 3.9GHz fundamental power coupler for the SHINE project  

作　　者：Zhen-Yu Ma Jin-Fang Chen 

机构地区：[1]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

出　　处：《Nuclear Science and Techniques》2021年第11期174-190,共17页核技术（英文）

基　　金：supported by Shanghai Municipal Science and Technology Major Project(No.2017SHZDZX02)。

摘　　要：The third harmonic superconducting cryomodule is being designed for the Shanghai High repetition rate XFEL and Extreme light facility(SHINE)project,which is under construction.In contrast to the European X-ray Free Electron Laser(E-XFEL)project,the 3.9 GHz cryomodules in the SHINE project will operate in the continuous wave regime with higher radio frequency average power for both cavities and couplers.We propose a 3.9 GHz fundamental power coupler with an adjustable antenna length,for satisfying the SHINE project requirements.Here,we describe the 3.9 GHz fundamental power coupler's design considerations and power requirements for various operating modes of the SHINE Linac.We also present the results of the radio frequency simulation and optimization,including the studies on multipacting and thermal analysis of the proposed 3.9 GHz coupler.

关 键 词：3.9 GHz fundamental power coupler Third harmonic cavity Superconducting cryomodule XFEL and extreme light facility(SHINE)Linac 

分 类 号：TN622[电子电信—电路与系统]