Development of an X-band 50 MW multiple beam klystron

Summary form only given. Calabazas Creek Research, Inc. is developing an X-band 50 MW multiple beam klystron (MBK) This MBK consists of eight discrete klystron circuits driven by eight electron beams located symmetrically on a circle with a radius of 6.3 cm. Each beam operates at 190 kV and 66 A. Each circuit consists of an input cavity, two gain cavities, three penultimate cavities, and a three cavity output circuit operating in the PI/2 mode. The total RF output power for this MBK is 55 MW. Current design results are presented as well as status of the development effort.