Progress of development for 170GHz gyrotron and 5kHz modulation power supply for ITER

An initial test of a multi-frequency gyrotron with 170GHz, 137GHz and 104 GHz is successfully performed in JAEA RF gyrotron test stand. More than 700 kW output power is achieved for all frequencies. A test of a prototype power supply for ITER is started. The feature of the power supply is a double anode switch for the 5 kHz modulation with a DC Anode Power Supply and a DC Body Power Supply. The initial gyrotron oscillation test by using the power supply is successfully finished.