Development of 170 GHz-long pulse gyrotrons for ITER is underway in JAERI. A cooling system was enhanced for CW gyrotron operation and a pre-programming control of a cathode heater power was introduced. As a preliminary result, stable quasi-steady-state oscillations of 450s /0.2 MW and 600s /0.13MW were obtained. An oscillation test tube with higher order mode TE/sub 31,12/ in cylindrical cavity and a high efficiency built-in mode converter has been developed for an advanced gyrotron system. In an initial experiment, performances of 1 MW /short pulse, the efficiency of 28% without depressed collector were obtained and measured output RF profile was in good agreement with the design.
Development of a 170GHz high-power and CW gyrotron for fusion application
2005-01-01
1810711 byte
Conference paper
Electronic Resource
English
Development of 170GHz Gyrotron for ITER
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