Density Fluctuation Measurements Using FIR Interferometer on HL-2A Tokamak
ZHOU Yan, LI Lian-Cai, LI Yong-Gao, JIAO Yi-Ming, DENG Zhong-Chao, YI Jiang, LIU Yi, ZHAO Kai-Jun, JI Xiao-Quan, PENG Bei-Bin, YANG Qing-wei, DUAN Xu-Ru, DING Xuan-Tong
Southwestern Institute of Physics, PO Box 432, Chengdu 610041
Density Fluctuation Measurements Using FIR Interferometer on HL-2A Tokamak
ZHOU Yan, LI Lian-Cai, LI Yong-Gao, JIAO Yi-Ming, DENG Zhong-Chao, YI Jiang, LIU Yi, ZHAO Kai-Jun, JI Xiao-Quan, PENG Bei-Bin, YANG Qing-wei, DUAN Xu-Ru, DING Xuan-Tong
Southwestern Institute of Physics, PO Box 432, Chengdu 610041
摘要Density fluctuations were first measured in the core region of HL-2A tokamak plasma using a newly developed multi-channel FIR interferometer system. In divertor ohmic discharges, we measured the radial density fluctuation levels of 5%, which increase to 10--20% during the appearance of MHD activity. Most of the power density in the density fluctuation spectrum is directly associated with m=2 tearing modes. The fluctuation levels reduce to 1/3 and plasma confinement is improved during off-axis electron-cyclotron-resonance heating (ECRH).
Abstract：Density fluctuations were first measured in the core region of HL-2A tokamak plasma using a newly developed multi-channel FIR interferometer system. In divertor ohmic discharges, we measured the radial density fluctuation levels of 5%, which increase to 10--20% during the appearance of MHD activity. Most of the power density in the density fluctuation spectrum is directly associated with m=2 tearing modes. The fluctuation levels reduce to 1/3 and plasma confinement is improved during off-axis electron-cyclotron-resonance heating (ECRH).
(General theory and basic studies of plasma lifetime, particle and heat loss, energy balance, field structure, etc.)
引用本文:
ZHOU Yan;LI Lian-Cai;LI Yong-Gao;JIAO Yi-Ming;DENG Zhong-Chao;YI Jiang;LIU Yi;ZHAO Kai-Jun;JI Xiao-Quan;PENG Bei-Bin;YANG Qing-wei;DUAN Xu-Ru;DING Xuan-Tong. Density Fluctuation Measurements Using FIR Interferometer on HL-2A Tokamak[J]. 中国物理快报, 2008, 25(7): 2558-2561.
ZHOU Yan, LI Lian-Cai, LI Yong-Gao, JIAO Yi-Ming, DENG Zhong-Chao, YI Jiang, LIU Yi, ZHAO Kai-Jun, JI Xiao-Quan, PENG Bei-Bin, YANG Qing-wei, DUAN Xu-Ru, DING Xuan-Tong. Density Fluctuation Measurements Using FIR Interferometer on HL-2A Tokamak. Chin. Phys. Lett., 2008, 25(7): 2558-2561.
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2008, Vol. 25 
