Pronitchev, O.V. Kazakov, S. Mechanical Design of a High Power Coupler for the PIP-II 325 MHz SSR1 RF Cavity JACoW Geneva, Switzerland 978-3-95450-178-6 10.18429/JACoW-SRF2015-THPB091 English 1354-1356 THPB091 vacuum cavity status cryomodule instrumentation Contribution to a conference proceedings 2015 2015-12 http://dx.doi.org/10.18429/JACoW-SRF2015-THPB091 http://srf2015.vrws.de/papers/thpb091.pdf The Project X Injector Experiment (PXIE) at Fermilab will include one cryomodule with eight 325 MHz single spoke superconductive cavities (SSR1). Each cavity requires approximately 2 kW CW RF power for 1 mA beam current operation. A future upgrade will require up to 8 kW RF power per cavity. Fermilab has designed and procured ten production couplers for the SSR1 type cavities. Status of the 325 MHz main coupler development for PXIE SSR1 cryomodule is reported.