Design of 325 MHz low beta half wave resonator cavity

A 325 MHz low beta half wave resonator (HWR) for proton accelerator was designed. The study on the principle of designing a superconducting cavity was described. The modeling on a new HWR was performed on different parts, then the electromagnetic analysis of the HWR was implemented. In the process of cavity design, parametric modeling was used to construct the cavity shape, then curved tetrahedral mesh cells were used to fulfill the EM calculation, and parameters sweeping was used to optimize the RF parameters of HWR superconducting cavity. The HWR cavity shape was also analyzed by means of multipacting calculation using TRACK3P code. Satisfied RF parameters were achieved on the new designed 325 MHz low beta HWR cavity. The new HWR cavity will be fabricated after more analysis and it may be applied to the linac for proton accelerator in the future.