Dependence of the RFQ Output Beam Current on the Proton Injector Operation Parameters

摘要

A 20-MeV proton accelerator has been developed by the Proton Engineering Frontier Project (PEFP). It consists of a 50-keV proton injector, a 3-MeV radio-frequency quadrupole (RFQ) and a 20-MeV drift tube linac (DTL). An ion source and a low-energy beam transport (LEBT) system constitute the proton injector. The main roles of the proton injector are to generate the proton beams and to transport and match the beam from the ion source into the RFQ. The output beam current and the transmission of the RFQ are directly influenced by the operation parameters of the proton injector, especially the two solenoid magnets. The output beam current of the RFQ was measured for various values of the solenoid magnet current and the results were compared with that of the simulation.