A high power RF coupler design for muon cooling RF cavities

We present a high power RF coupler design for an interleaved π/2 805 MHz standing wave accelerating structure proposed for a muon cooling experiment at FNAL. The coupler, in its simplest form, is a rectangular waveguide directly connected to an accelerating cell through an open slot on the cavity side-wall or end-plates. Two of such couplers are needed to feed the interleaved cavities. Current high power RF test requires the coupler to be at critical coupling. Numerical simulations on the coupler designs using MAFIA are presented