Chen, M. Chen, S. Cheng, A.Q. Cheng, W. Hao, J.K. Quan, S.W. Zhu, F. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-THPO076 English 863-865 THPO076 cavity multipactoring simulation SRF accelerating-gradient Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-THPO076 http://jacow.org/linac2018/papers/thpo076.pdf A 81.25MHz, geometric β=0.046 quarter-wave resonator has been designed and analysed at Peking University. This paper mainly presents the multi-physics studies of this cavity, include electromagnetic design, mechanical analysis and multipacting simulation, to predict its behaviour under practical operating process. Various transverse vibration modes of inner conductor were found under different fixed conditions and an asymmetric shorting plate was adopted to avoid high possibility of multipacting