Design of Injector for Carbon Cancer Therapy

An injector consisting of a Radio Frequency Quadrupole (RFQ) and Drift Tube Linacs (DTLs) was designed for cancer therapy systems. The extraction energy of the RFQ was 0.6 MeV/u, the extraction energy of the DTLs was 6 MeV/u, and the frequency was 200 MHz. To employ a compact solid-state power amplifier system, we designed one high-Q RFQ and three high-Q DTLs, with triplet quadrupole magnets between the DTLs.