Long Pulse and High Power Repetitive Operation of the 170 GHz ITER Gyrotron

Abstract

Details of the first repetitive operation of a 170 GHz long pulse gyrotron with quasi-CW (400 s pulse width) and high power are presented. The interval between pulses was 30 minutes, which matches the ITER operation scenario. The repetitive operation continued for 5 hours without problems and terminated as planned. The pressure inside the gyrotron returned to the original level after 20 minutes. This was the first operation for the high power gyrotron system applicable to ITER.