DEVELOPMENT OF A 100 MW X-BAND RELATIVISTIC KLYSTRON AMPLIFIER

A need exists for compact, lightweight high power microwave sources for RF weapons applications. To meet this need, we will, through analysis, computer simulation and RF testing, design a broadband (600 MHz) 100 MW relativistic klystron operating at 12.0 GHz with 120Hz pulse repetition rate and a minimum pulse width of 1.0 microsecond. The analysis, design and simulation will be based on conventional kystron theory. We will design a low perveance electron gun capable of generating a solid electron beam from a thermionic cathode operating in ultra high vacuum. We will design through computer simulation, an electromagnetic-electron beam interaction circuit capable of producing 100 MW with a minimum saturated gain of 50 dB and a minimum efficiency of 45%. We will design and analyze for possible RF electric field breakdown a multiple cavity output circuit capable of efficiently extracting the fundamental RF power from the electron beam. We will emphasize high thermal capabiliy, long life and robust construction. We will design, fabricate and RF test all cavities including the multi-cavity output circuit. We will also design and RF test an output waveguide assembly with multiple ceramic windows. In Phase II, we propose to complete the mechanical design, fabricate and RF test the various subassemblies, assemble and test this 100 MW x-band RKA.