KEK, Ibaraki
LAL, Orsay
IHEP Beiing, Beijing
High power tests of the STF cryomodule including four MHI cavities and STF-1 input couplers were carried out at KEK. The maximum input rf power of 360 kW was successfully transfered to the cavity operated at high gradients at 2 K. After the cryomodule tests, the conditioning test of the coupler at room temperature was carried out, and rf processing up to 650 kW (1.5 ms and 5 Hz) was achieved. TTF-V couplers were shipped from LAL to KEK, and the high power test was carried out at KEK-STF. Rf processing up to 2 MW in the short pulse of 400 us (5 Hz) and 1 MW in the long pulse of 1.5 ms (5Hz) was demonstrated. The results of the coupler processing at KEK will be reproted in this talk.
