Shin, I. Hyun, M.O. Kako, E. Sung, C.K. Design of QWR Power Coupler for the Rare Isotope Science Project in Korea JACoW Geneva, Switzerland 978-3-95450-178-6 10.18429/JACoW-SRF2015-THPB082 English 1326-1329 THPB082 simulation pick-up cavity diagnostics cryomodule Contribution to a conference proceedings 2015 2015-12 http://dx.doi.org/10.18429/JACoW-SRF2015-THPB082 http://srf2015.vrws.de/papers/thpb082.pdf A power coupler has been designed for the Rare Isotope Science Project (RISP) in Korea. The power couplers will provide 4 kW RF power to 81.25 MHz superconducting quarter wave resonators with β=0.047. The coupler is a coaxial capacitive type with an impedance of 50 ohms using a disc type ceramic window. Design studies of the coupler are presented.