中国物理B ›› 2004, Vol. 13 ›› Issue (6): 887-890.doi: 10.1088/1009-1963/13/6/018

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Sawtooth-like electron density oscillations under laser blow-off and lower hybrid current drive in HL-1M tokamak

周艳1, 焦一鸣2, 邓中朝3, 高庆第3   

  1. (1)School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China; (2)School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China; Southwestern Institute of Physics, Chengdu 610041, China; (3)Southwestern Institute of Physics, Chengdu 610041, China
  • 收稿日期:2003-10-16 修回日期:2004-02-10 出版日期:2004-07-05 发布日期:2005-07-05
  • 基金资助:
    Project supported by the Nuclear Science Foundation (Grant No H7196c0302) and the National Natural Science Foundation of China (Grant Nos 10075016, 10135020 and 10275018).

Sawtooth-like electron density oscillations under laser blow-off and lower hybrid current drive in HL-1M tokamak

Jiao Yi-Ming (焦一鸣)ab, Zhou Yan (周艳)a, Deng Zhong-Chao (邓中朝)b, Gao Qing-Di (高庆第)b   

  1. a School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China; b Southwestern Institute of Physics, Chengdu 610041, China
  • Received:2003-10-16 Revised:2004-02-10 Online:2004-07-05 Published:2005-07-05
  • Supported by:
    Project supported by the Nuclear Science Foundation (Grant No H7196c0302) and the National Natural Science Foundation of China (Grant Nos 10075016, 10135020 and 10275018).

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摘要： By using of a six-channel HCN laser interferometer, the sawtooth-like density oscillations without being exhibited in the ohmic phase plasma have been observed during lower hybrid current drive (LHCD) discharges in the HL-1M device. There are often accompanied by injected impurity with laser blow-off. Analyses show that this kind of density sawtooth-like oscillation comes from the mutual effect of LHCD and impurity. An available mechanism is the loss of superthermal electrons by the magnetic perturbation, which is caused by the crash of the central accumulated impurities.

关键词: sawtooth-like density oscillations, laser blow-off, lower hybrid current drive, superthermal electrons

Abstract: By using of a six-channel HCN laser interferometer, the sawtooth-like density oscillations without being exhibited in the ohmic phase plasma have been observed during lower hybrid current drive (LHCD) discharges in the HL-1M device. There are often accompanied by injected impurity with laser blow-off. Analyses show that this kind of density sawtooth-like oscillation comes from the mutual effect of LHCD and impurity. An available mechanism is the loss of superthermal electrons by the magnetic perturbation, which is caused by the crash of the central accumulated impurities.

Key words: sawtooth-like density oscillations, laser blow-off, lower hybrid current drive, superthermal electrons

中图分类号:  (Electric discharges)

  • 52.80.-s
52.35.Hr (Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid)) 52.38.-r (Laser-plasma interactions) 52.55.Fa (Tokamaks, spherical tokamaks) 52.25.Vy (Impurities in plasmas) 52.35.Fp (Electrostatic waves and oscillations (e.g., ion-acoustic waves))