Mechanical design and analysis for a low beta squeezed half-wave resonator
Abstract
A superconducting half-wave resonator (HWR) of frequency=162.5 MHz and {\beta}=0.09 has been developed at Institute of Modern Physics. Mechanical stability of the low beta HWR cavity is a big challenge in cavity design and optimization. The mechanical deformations of a radio frequency superconducting cavity could be a source of instability, both in continues wave(CW) operation or in pulsed mode. Generally, the lower beta cavities have stronger Lorentz force detuning than that of the higher beta cavities. In this paper, a basic design consideration in the stiffening structure for the detuning effect caused by helium pressure and Lorentz force has been presented. The mechanical modal analysis has been investigated with finite element method(FEM). Based on these considerations, a new stiffening structure has been promoted for the HWR cavity. The computation results concerning the frequency shift show that the low beta HWR cavity with new stiffening structure has low frequency sensitivity coefficient, Lorentz force detuning coefficient KL and stable mechanical property.
Keywords
Cite
@article{arxiv.1309.6035,
title = {Mechanical design and analysis for a low beta squeezed half-wave resonator},
author = {Shoubo He and Yuan He and Shenghu Zhang and Weiming Yue and Cong Zhang and Zhijun Wang and Ruoxu Wang and Mengxin Xu and Shichun Huang and Yulu Huang and Tiancai Jiang and Fengfeng Wang and Shengxue Zhang and Hongwei Zhao},
journal= {arXiv preprint arXiv:1309.6035},
year = {2015}
}
Comments
this work is supported by Strategic Priority Research Program of CAS (Grant No. Y1020700ADS)and National Natural Science Foundation of China (Grant No. 91026001)