High current microwave proton ion source

45-49A high current, high-density microwave proton ion source having 40 keV beam energy and 30mA proton beam current has been designed and under development at CAT, Indore. The source will be used as an injector to Radio Frequency Quadrupole (RFQ). The major components of the Microwave Ion Source (MIS) are, plasma chamber and vacuum system, microwave system, electromagnet and its power supply, high voltage insulator dome and platform, beam extraction system and supervisory control system. This paper describes the design in detail of high current microwave proton ion source and its various subassemblies