中国物理B ›› 2019, Vol. 28 ›› Issue (10): 105201-105201.doi: 10.1088/1674-1056/ab427a

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Construction of an Hα diagnostic system and its application to determine neutral hydrogen densities on the Keda Torus eXperiment

Junfeng Zhu(朱军锋), Tao Lan(兰涛), Ge Zhuang(庄革), Tijian Deng(邓体建), Jie Wu(吴捷), Hangqi Xu(许航齐), Chen Chen(陈晨), Sen Zhang(张森), Jiaren Wu(邬佳仁), Yiming Zu(祖一鸣), Hong Li(李弘), Jinlin Xie(谢锦林), Ahdi Liu(刘阿娣), Zixi Liu(刘子奚), Zhengwei Wu(吴征威), Hai Wang(汪海), Xiaohui Wen(温晓辉), Haiyang Zhou(周海洋), Chijin Xiao(肖持进), Weixing Ding(丁卫星), Wandong Liu(刘万东)   

  1. 1 KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China;
    2 Plasma Physics Laboratory, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
  • 收稿日期:2019-04-22 修回日期:2019-04-19 出版日期:2019-10-05 发布日期:2019-10-05
  • 通讯作者: Tao Lan E-mail:lantao@ustc.edu.cn
  • 基金资助:

    Project supported by the National Magnetic Confinement Fusion Science Program of China (Grant No. 2017YFE0301700) and the National Natural Science Foundation of China (Grant No. 11635008).

Construction of an Hα diagnostic system and its application to determine neutral hydrogen densities on the Keda Torus eXperiment

Junfeng Zhu(朱军锋)1, Tao Lan(兰涛)1, Ge Zhuang(庄革)1, Tijian Deng(邓体建)1, Jie Wu(吴捷)1, Hangqi Xu(许航齐)1, Chen Chen(陈晨)1, Sen Zhang(张森)1, Jiaren Wu(邬佳仁)1, Yiming Zu(祖一鸣)1, Hong Li(李弘)1, Jinlin Xie(谢锦林)1, Ahdi Liu(刘阿娣)1, Zixi Liu(刘子奚)1, Zhengwei Wu(吴征威)1, Hai Wang(汪海)1, Xiaohui Wen(温晓辉)1, Haiyang Zhou(周海洋)1, Chijin Xiao(肖持进)1,2, Weixing Ding(丁卫星)1, Wandong Liu(刘万东)1   

  1. 1 KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China;
    2 Plasma Physics Laboratory, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
  • Received:2019-04-22 Revised:2019-04-19 Online:2019-10-05 Published:2019-10-05
  • Contact: Tao Lan E-mail:lantao@ustc.edu.cn
  • Supported by:

    Project supported by the National Magnetic Confinement Fusion Science Program of China (Grant No. 2017YFE0301700) and the National Natural Science Foundation of China (Grant No. 11635008).

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摘要：

A 10-channel Hα diagnostic system has been designed with the rapid response rate of 300 kHz, spatial resolution of about 40 mm, and overlap between adjacent channels of about 3%, and it has been implemented successfully on Keda Torus eXperiment (KTX), a newly constructed, reversed field pinch (RFP) experimental device at the University of Science and Technology of China (USTC). This diagnostic system is a very important tool for the initial KTX operations. It is compact, with an aperture slit replacing the traditional optical lens system. A flexural interference filter is designed to prevent the center wavelength from shifting too much as the increase of angle from vertical incidence. To eliminate the stray light, the interior of the system is covered with the black aluminum foil having a very high absorptivity. Using the Hα emission data, together with the profiles of electron temperature and density obtained from the Langmuir probe, the neutral density profiles have been calculated for KTX plasmas. The rapid response rate and good spatial resolution of this Hα diagnostic system will be beneficial for many studies in RFP plasma physics.

关键词: Hα diagnostic, neutral density, Keda Torus eXperiment (KTX) device

Abstract:

A 10-channel Hα diagnostic system has been designed with the rapid response rate of 300 kHz, spatial resolution of about 40 mm, and overlap between adjacent channels of about 3%, and it has been implemented successfully on Keda Torus eXperiment (KTX), a newly constructed, reversed field pinch (RFP) experimental device at the University of Science and Technology of China (USTC). This diagnostic system is a very important tool for the initial KTX operations. It is compact, with an aperture slit replacing the traditional optical lens system. A flexural interference filter is designed to prevent the center wavelength from shifting too much as the increase of angle from vertical incidence. To eliminate the stray light, the interior of the system is covered with the black aluminum foil having a very high absorptivity. Using the Hα emission data, together with the profiles of electron temperature and density obtained from the Langmuir probe, the neutral density profiles have been calculated for KTX plasmas. The rapid response rate and good spatial resolution of this Hα diagnostic system will be beneficial for many studies in RFP plasma physics.

Key words: Hα diagnostic, neutral density, Keda Torus eXperiment (KTX) device

中图分类号:  (Plasma diagnostic techniques and instrumentation)

  • 52.70.-m
52.25.Ya (Neutrals in plasmas) 28.52.-s (Fusion reactors)