%0 Journal Article
%T Density Fluctuation Measurements Using FIR Interferometer on HL-2A Tokamak<br>
%A ZHOU Yan
%A LI Lian-Cai
%A LI Yong-Gao
%A JIAO Yi-Ming
%A DENG Zhong-Chao
%A YI Jiang
%A LIU Yi
%A ZHAO Kai-Jun
%A JI Xiao-Quan
%A PENG Bei-Bin
%A YANG Qing-wei
%A DUAN Xu-Ru
%A DING Xuan-Tong
%A <br>
%J 中国物理快报
%D 2008
%I 
%X 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).
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%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=0E305562A52560117A8567F676DF797E&yid=67289AFF6305E306&vid=C5154311167311FE&iid=DF92D298D3FF1E6E&sid=05F50C9DD505CDDA&eid=89C852E618F0CA13&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0