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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.

A 3MeV RFQ for 100MeV proton accelerator has been developed at PEFP (Proton Engineering Frontier Project). The tuning results of the cavity showed that both the frequency and field profile were beyond the tuner limit.To check the cavity characteristics, RF test including proton beam acceleration has been done. To solve the problems in existing RFQ, new RFQ so called RFQ Upgrade has been fabricated. Because the main problem of the existing one is improper tuning of the cavity, the important step for development of RFQ Upgrade is to adjust the vanes before brazing. In this paper, the test results of the existing PEFP RFQ and the pre-brazing tuning are presented.

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