First 200 kW CW operation of a 60 GHz gyrotron

Abstract

The gyrotron is a microwave tube which employs the electron cyclotron maser interaction to produce high power output at millimeter wavelengths. It has important Bnd growing applications for heating of plasmas in controlled thermonuclear fusion experiments. The Varian 60 GHz gyrotron has recently generated microwave power in excess of 200 kW during CW operation, with excellent dynamic range and operating stability. This is the highest average power ever produced by a microwave tube in the millimeter wave region. A description of the gyrotron design and test results are presented.

A Method for non-destructive testing of resonant frequency in the W-band second harmonic gyrotron complex cavity

“…However, as the harmonic number increases, the issue of mode competition becomes more severe. Recent research has shown that employing a complex cavity with gradual transition [1][2][3][4][5], which has a transmission mode of TEmn/TEmn can effectively suppress mode competition and enhance the efficiency of gyrotron operation.…”