Multi-Channel FIR HCN Laser Interferometer on HT-7 Tokamak |
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Authors: | Y. X. Jie X. Gao Y. F. Cheng K. Yang X. D. Tong |
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Affiliation: | (1) Institute of Plasma Physics, Academia Sinica, P.O. Box 1126, Hefei Anhui, 230031, People's Republic of China |
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Abstract: | A Five-channel far-infrared (FIR) hydrogen cyanide (HCN) laser interferometer was developed to measure plasma electron density profile on the HT-7 superconducting tokamak. The structure of the five-channel FIR laser interferometer is described. The laser source used in the interferometer was a continuous wave glow discharge HCN laser with 3.4 m cavity length and 100 mW power output at 337 m wavelength. The temporal resolution was 0.1 ms and the detection sensitivity was 1/12 fringe. Preliminary experimental results measured by the interferometer on HT-7 tokamak are reported. |
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