Indigenous development of 50 kV, 1A high PRR solid state modulators for triode electron gun for RF linac

A challenging design and development effort for the triode type electron gun and its associated component and test systems was taken up at Pulse High Power Microwave Division, PHPMD, RRCAT. The electron gun needs upto 50kV pulse voltage with over 12 microsecs pulse duration and PRR upto 200 Hz. The emission from the electron gun cathode was designed to be 1 Amp. Keeping in view these requirements of the triode type electron gun an all solid state modulator was designed, developed and used for the electron guns. The solid state modulator has been subjected to stringent qualification tests along with long duration endurance testing. The present paper discusses the design, development and commissioning aspects of the solid state electron gun modulator and its results with the electron gun used in the linac. (author)