Achievement of 1.5 MW, 1 s Oscillation by the JT-60U Gyrotron

Abstract

High-power gyrotrons are required for electron cyclotron heating/current drive in high-performance plasma experiments. In Japan Atomic Energy Agency, the operation conditions of the JT-60U gyrotron, which was originally designed as a 1-MW gyrotron, were optimized in order to achieve high-power and long-pulse operation with some modifications of the gyrotron components. As a result, the output power level of 1.5 MW for 1 s was successfully achieved.