Tuning of 20MeV PEFP DTL

The PEFP (Proton Engineering Frontier Project) DTL which accelerate the proton beam having peak current 20 mA to 20 MeV have been constructing in KAERI site [1]. The tank resonant frequency is 350 MHz and a 1 MW klystron is used for 4 tanks. In this paper, the overall features of the PEFP DTL tuning are presented and the measurement results of the DTL tank 1 are discussed.