Speaker
Description
In order to improve the ability of the J-TEXT tokamak which firstly only had the ohmic heating, we had begun to develop the electron cyclotron resonance heating (ECRH) system since 2017. The first ECRH system with the frequency of 105 GHz and the output power of 500 kW for 1s was successfully operated in 2019. This system is a traditional one which consists of a gyrotron from GYCOM, a transmission line with the length of about 30 m, a launcher with a elliptical mirror and a moveable flat mirror etc. Then, the second system with the same parameters was used for experiments in 2023 and the launcher was upgraded to inject the two beams. Up to now, the ECRH system has become one of the most important auxiliary system for the J-TEXT tokamak. Various experiments such as the assisted start-up, the control of the tearing mode, the electron thermal transport, the density limit etc. had been carried out on J-TEXT tokamak with the ECRH system.
