Low power test of RFQ mock-up modules at 175 MHz for IFMIF project

The 175 MHz RFQ mock-up modules which consist of end-plate modules and central modules, have been designed by MAFIA code, and the mock-up modules have been fabricated for a low power test. By the low power test results and the analysis of higher modes, it was found that the resonant frequency of operation mode (TE/sub 210/) is not affected by higher modes in the RFQ length of 4.1 m. This result showed one of feasibility for the application technique using two coupling plates in the 12 m-long IFMIF RFQ.