关键词: HL-3 装置；天线；聚焦镜；电机 

Abstract: For different purposes of plasma experiments in HL-3 tokamak, three sets of launchers are designed for the electron cyclotron resonance heating system. The No.1 upper launcher contains two microwave beams. Its main function is to control the instability of MHD and suppress the new classical tearing mode (NTM) in real time. To control and suppress NTM in real-time, it is necessary to rely on the launcher to quickly change the injection angle, and then inject microwave to magnetic island. In response to the problems in the previous optical path design, the focusing mirror of No.1 upper launcher has been redesigned and processed. The performance of the launcher was tested using a laser simulated microwave on an optics testing platform. The fastest change time for the left and right motors of the tested launcher to operate at full range (injection angle −15° to −80°) is 189.875ms and 189.5ms. The test results show that the launcher control is accurate and fast, which meets the requirements for experimental use of the device. 

Key words: HL-3 tokamak, Launcher, Focusing mirror, Electric motor