Abstract
Radio frequency (RF) power couplers for quarter wave resonators (QWR) have been developed for rare isotope science project (RISP) in Daejeon Korea. The power coupler is required to deliver up to 2 kW RF power at 81.25 MHz to the QWR cavity in continuous-wave (CW) mode. The prototype of QWR RF power couplers are fabricated and tested. The coupler test bench has been developed in order to conduct RF processing. The RF processing consists of two section, pulse mode and CW mode. The multipaction (MP) band of the QWR coupler has been measured during RF processing. After the RF processing, the RF test has been performed keeping 2.0 kW RF power during 8 hours. As the results of the RF test, the prototype of couplers for QWR has been qualified to assemble with the cavity for cryomodule test.
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