Mechanical analysis of low β 162.5 MHz taper HWR cavity

作     者：范培亮 朱凤 钟胡天翔 全胜文 刘克新 Fan Peiliang;Zhu Feng;Zhong Hutianxiang;Quan Shengwen;Liu Kexin

作者机构：北京大学 重离子物理研究所 北京 100871 中国工程物理研究院 流体物理研究所 四川 绵阳 621900 

出 版 物：《强激光与粒子束》 (High Power Laser and Particle Beams)

年 卷 期：2016年第28卷第4期

页      面：170-174页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：supported by National Basic Research Project (2014CB845504) 

主　　题：half-wave resonator tuning Lorentz force detuning helium pressure detuning 

摘      要：Peking University is designing a superconducting taper-type half-wave resonator （HWR） withfrequency of 162.5 MHz and β of 0.09 for high current proton beam （about 100 mA） and deuteron beam （about50 mA） acceleration. For this kind of SRF cavity, mechanical analysis is important to predict the frequencyshift caused by the cavity deformation. ANSYS codes are used to analyse the frequency shift caused by heliumbath pressure and Lorentz force, and the tuning range. Simulation results show that this HWR cavity has pressure sensitivity as low as 31.1 Hz/kPa and Lorentz force detuning coefficient of --0.41 Hz/（MV · m ^-1）e. Thetuning range of the cavity is ±4 177 kHz which is wide enough for compensating the possible frequency *** mechanical property of the cavity permits the cavity＇s stable operation.