The cavity test facility " cryholab " as a test stand for high power couplers at cryogenic temperature

A collaboration between the IPN-Orsay and the CEASaclay groups involved in Superconducting RF Cavities (SCRF) activities are working on 700 MHz elliptical cavities for the high energy part of a high intensity proton accelerator. The study of the fundamental power coupler (FPC) for these cavities has just started. The coupler should deliver 150 kW in CW mode (this is the maximum power needed for the β=0.85 five-cell elliptical cavities foreseen for the proton linac in the XADS and EURISOL projects). The FPC design is based on the SNS power coupler (based on the KEK design). While the scaling from 805 MHz to 704 MHz is being performed, and the FCP thermal behaviour and cooling calculated, we are studying the possibility to use the "CryHoLab" facility (the horizontal test stand for multi-cells superconducting cavities) as a power coupler test stand at cryogenic temperature.