中国物理B ›› 2008, Vol. 17 ›› Issue (12): 4562-4567.doi: 10.1088/1674-1056/17/12/038
Analysis of DαHα spectrum emitted in front of the limiter in HT--7
黄娟1, 万宝年1, 肖炳甲1, 吴振伟1, theHT--7team1, DarenStotler2
- (1)Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, China; (2)Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, USA
Analysis of D$\alpha$H$\alpha$ spectrum emitted in front of the limiter in HT--7
Huang Juan (黄娟)a, Wan Bao-Nian (万宝年)a, Daren Stotlerb, Xiao Bing-Jia(肖炳甲)a, Wu Zhen-Wei (吴振伟)a, the HT--7 teama
- a Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, China; b Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, USA
摘要： In order to understand the recycling and emission processes of hydrogen atoms in HT--7, spectral profiles of the DαHα line emitted in front of the limiter have been observed with a high-resolution spectrometer and simulated by using the neutral particle transport code DEGAS 2. The results show that four processes are necessary to interpret the DαHα line shape: 1) atom desorption, 2) molecular dissociation, 3) particle reflection, and 4) charge-exchange. The products of the first two processes are cold atoms which emit photons near the peak of DαHα line shape, and those from the last two are warm atoms contributing to the blue side of the spectrum. For a typical ohmic discharge (shot 68520 ne (0)≈3x1019m-3, these components contribute 32%, 15%, 32% and 21%, respectively. DαHα line shapes under different plasma parameters are also discussed in this paper.
中图分类号: (Tokamaks, spherical tokamaks)
- 52.55.Fa