Development of the Fundamental Power Coupler for the Quarter Wave Resonator in the Rare Isotope Science Project

The fundamental power coupler (FPC) for quarter wave resontor (QWR) has been developed in Rare Isotope Science Project (RISP), Korea. The FPC is required to deliver RF power up to 3.5 kW at 81.25 MHz in the continuous wave (CW) mode. The prototype of the FPC was fabricated and tested, and mass production has begun. The design and fabrication of and the test results of the FPC for mass production are presented in this paper.