Development Of Microwave Current Start-Up Experiment On Sunist

Spherical Tokamak is showing an attractive promising route for commercial application of fusion energy. The main goal of Sino UNIted Spherical Tokamak(SUNIST), which is the first spherical tokamak in China, is to research basic characteristic of plasma at low aspect ratio , non-inductive and Heating and Current Drive(H&CD) .Our purpose in this paper is to develop electrode discharge assisted electron cyclotron wave current start-up on SUNIST (Sino UNIted Spherical Tokamak) device, explore the way of canceling ohmic coil completely.The paper introduces the principle of H&CD and the microwave power system and power supply for electrode discharge for non-inductive current drive experiments. The test result indicates, it is reliable that this power supply system discharge steadily, has offered the essential condition that the plasma microwave current start-up experiment soon.