Report on the 1 MW-CW X-band klystron

A two-year program to develop a klystron amplifier operating at 8 Gc and delivering one megawatt of CW power is nearing conclusion. The final tube employs extended-interaction cavities with the output cavity having four output windows. The tube is designed to operate at 150 kilovolts at a micro-perveance of about 0.29. At last year´s meeting a paper described several experiments having to do with the design of an electron gun and focusing system providing in excess of 99.9% beam transmission at the 2 megawatt DC level. Test results of short pulse tubes was also given.