Innovative modular, multiple power levels, 325 MHz spokes cavities power couplers

In order to increase the protons energy up to 8 GeV in a driver Linac, the particles must be accelerated through various stages and three different power levels (25 kW, 100 kW and 210 kW) are required for the 325 MHz Fermilab Proton Driver couplers. The problem identified by the project is that no high RF power coupler for these cavities has ever been designed and produced using US industrial capabilities. AMAC proposed a novel resolution by development of innovative modular, multiple power levels, 325 MHz spoke cavities power couplers, which to meet three type cavities with one coupler design. The simulation and concept design are presented. The results of HFSS, MAFIA, ANSYS, and Multipacting are also discussed.