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. ...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))^(2). Thetuning range of the cavity is ±4 177 kHz which is wide enough for compensating the possible frequency shift.The mechanical property of the cavity permits the cavity's stable operation.展开更多
基金supported by National Basic Research Project (2014CB845504)
文摘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))^(2). Thetuning range of the cavity is ±4 177 kHz which is wide enough for compensating the possible frequency shift.The mechanical property of the cavity permits the cavity's stable operation.
