Fig. 1. Overall layout of ECRH system for HL-3 tokamak

Fig. 2. Microwave deposition at different frequencies

Fig. 3. Diagram of three launchers' positions

Fig. 4. Schematic diagram of the optical path of the mid equatorial launcher

Fig. 5. Conceptual design drawing of the No.1 upper launcher

Fig. 6. Optical path design of the No.2 upper launcher

Fig. 7. Test results of polar rotation speed of the mid equatorial launcher (a) Left path, (b) Right path

Fig. 8. Test results of polar rotation speed of the No.1 upper launcher (a) Left path, (b) Right path

Fig. 9. Calibration of the transmission angle of the No.1 upper launcher (a) Left path, (b) Right path