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WANG Chao (王超), ZHOU Jun (周俊), HUANG Mei (黄梅), WANG He (王贺), CHEN Gangyu (陈罡宇), RAO Jun (饶军). ECRH Launcher for Four-Beam Injection on HL-2A Tokamak[J]. Plasma Science and Technology, 2013, 15(5): 476-479. DOI: 10.1088/1009-0630/15/5/16
Citation: WANG Chao (王超), ZHOU Jun (周俊), HUANG Mei (黄梅), WANG He (王贺), CHEN Gangyu (陈罡宇), RAO Jun (饶军). ECRH Launcher for Four-Beam Injection on HL-2A Tokamak[J]. Plasma Science and Technology, 2013, 15(5): 476-479. DOI: 10.1088/1009-0630/15/5/16

ECRH Launcher for Four-Beam Injection on HL-2A Tokamak

Funds: supported by International S&T Cooperation Program of China (No. S2011GR0412)
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  • Received Date: August 28, 2011
  • An Electron Cyclotron Resonance Heating (ECRH) launcher for four-beam injection has been installed on the HL-2A tokamak and used in plasma heating experiments. By the launcher, four EC wave beams can be injected into the tokamak through a Ø350 mm port, which are generated from 2 sets of 68 GHz/1 s and 2 sets of 68 GHz/1.5 s gyrotron tubes manufactured by GYCOM, with maximum output power of 500 kW for each. In this paper, the properties of the EC beam in the launcher and plasma are presented: at the centre of the cross section of the tokamak, the beam radius is 31.7 mm; thermal analysis of a 3D model indicates that the peak temperature increase would be only 30oC at the mirror surface for a 500 kW/1 s pulse; ray-tracing calculation predicts satisfactory power deposition. In the plasma experiment, six beams including four beams from this launcher and two from another launcher have been injected simultaneously. Besides, obtaining ELM-y H-mode discharges, the ECRH system shows reliability and stability of the launcher functions.
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