Research of hybrid single cavity linac

We present a study of the compact proton linac for boron neutron capture therapy (BNCT) by using the nuclear reaction 10B(n, α)7Li. In order to downsize the linac system, we propose a hybrid type linac combined with radio frequency quadrupole (RFQ) electrodes and drift tube electrodes in a single cavity. We designed an interdigital-H (IH) mode linac with high power efficiency to accelerate proton beams from an injection energy of 40 keV to an acceleration energy of 3 MeV and an operation frequency of 80 MHz. The resonance frequencies and electromagnetic fields were optimized by simulation. As a result, we were able to design cavity lengths of less than 2 m in the simulation model. For this purpose, high frequency properties were carried out in the electromagnetic field simulation. The designed concept of the hybrid linac and the results of electromagnetic field simulation will be in this report.