Chin. Phys. Lett.  2004, Vol. 21 Issue (7): 1310-1313    DOI:
Original Articles |
Observation of Magnetohydrodynamics Instabilities in Ion Berstein Wave and Lower-Hybrid-Current Driving Synergetic Discharges on HT-7 Tokamak
MAO Jian-Shan;LUO Jia-Rong;SHEN Biao;ZHAO Jun-Yu;HU Li-Qun;ZHU Yu-Bao;XU Guo-Sheng; M. Asif, GAO Xiang;WAN Bao-Nian
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
Cite this article:   
MAO Jian-Shan, LUO Jia-Rong, SHEN Biao et al  2004 Chin. Phys. Lett. 21 1310-1313
Download: PDF(628KB)  
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract The normalized performance indicated by the product of βNH89 > 2 was achieved by a combination of the lower hybrid current driving (LHCD) and the ion Berstein wave (IBW) heating in the HT-7 tokamak. More than 80% of the plasma current was sustained by the LHCD and the bootstrap current. Large edge pressure gradients were observed. The magnetohydrodynamic (MHD) instabilities were often driven to terminate the discharge or reduce the discharge performance, when the IBW resonant layer was near the rational surface. The resonant layer of the safety factor q = 2 is located at 0.6a with a = 27 cm being the minor radius. The width of magnetic island (the poloidal mode number m = 2) was about 2 cm. The plasma energy was reduced quickly by 30% by MHD instabilities. The behaviour of MHD instabilities is reported. A large sawtooth activity (m = 1) was observed before inducing MHD (m = 2).



Keywords: 52.55.Fa      52.50.Sw      52.30.Cv     
Published: 01 July 2004
PACS:  52.55.Fa (Tokamaks, spherical tokamaks)  
  52.50.Sw (Plasma heating by microwaves; ECR, LH, collisional heating)  
  52.30.Cv (Magnetohydrodynamics (including electron magnetohydrodynamics))  
TRENDMD:   
URL:  
https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2004/V21/I7/01310
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
MAO Jian-Shan
LUO Jia-Rong
SHEN Biao
ZHAO Jun-Yu
HU Li-Qun
ZHU Yu-Bao
XU Guo-Sheng
M. Asif
GAO Xiang
WAN Bao-Nian
Related articles from Frontiers Journals
[1] CHEN Shao-Yong, WANG Zhong-Tian, TANG Chang-Jian. Excitation of Internal Kink Mode by Circulating Supra-thermal Electrons[J]. Chin. Phys. Lett., 2012, 29(2): 1310-1313
[2] DI Long, SHI Jian-Rong, WANG Shou-Jun, DONG Quan-Li, ZHAO Jing, LI Yu-Tong, FU Jia, WANG Fu-Di, SHI Yue-Jiang, WAN Bao-Nian, ZHAO Gang**, ZHANG Jie, . Emission Lines of Boron, Carbon, Oxygen and Iron in Tokamak Plasma[J]. Chin. Phys. Lett., 2011, 28(7): 1310-1313
[3] JI Zhen, **, ZHOU Yu-Fen, HOU Tian-Xiang . A Modified Third-Order Semi-Discrete Central-Upwind Scheme for MHD Simulation[J]. Chin. Phys. Lett., 2011, 28(7): 1310-1313
[4] CHEN Zhao-Quan, **, LIU Ming-Hai***, ZHOU Qi-Yan, HU Ye-Lin, YANG An, ZHU Long-Ji, HU Xi-Wei . Numerical Reproduction of Spatio-Temporal Evolution of Surface Plasmon Polaritons at Dielectric-Plasma Interface[J]. Chin. Phys. Lett., 2011, 28(4): 1310-1313
[5] HU Ye-Lin, CHEN Zhao-Quan, **, LIU Ming-Hai**, HONG Ling-Li, LI Ping, ZHENG Xiao-Liang, XIA Guang-Qing**, HU Xi-Wei . Observation of Hot Electrons in Surface-Wave Plasmas Excited by Surface Plasmon Polaritons[J]. Chin. Phys. Lett., 2011, 28(11): 1310-1313
[6] JI Zhen, ZHOU Yu-Fen. A Comparison Study of Three CESE Schemes in MHD Simulation[J]. Chin. Phys. Lett., 2010, 27(8): 1310-1313
[7] JI Xiao-Quan, YANG Qing-Wei, LIU Yi, ZHOU Jun, FENG Bei-Bin, YUAN Bao-Shan. First Observation of Neoclassical Tearing Modes in the HL-2A Tokamak[J]. Chin. Phys. Lett., 2010, 27(6): 1310-1313
[8] CHEN Zhao-Quan, LIU Ming-Hai, TANG Liang, LV Jian-Hong, HU Xi-Wei. Surface Wave Analysis of Planar-Type Overdense Plasma with Surface Plasmon Polariton Resonance[J]. Chin. Phys. Lett., 2010, 27(2): 1310-1313
[9] G. A. Hoshoudy . Quantum Effects on Rayleigh–Taylor Instability of Incompressible Plasma in a Vertical Magnetic Field[J]. Chin. Phys. Lett., 2010, 27(12): 1310-1313
[10] FANG Tie-Gang, ZHANG Ji, YAO Shan-Shan. Slip Magnetohydrodynamic Viscous Flow over a Permeable Shrinking Sheet[J]. Chin. Phys. Lett., 2010, 27(12): 1310-1313
[11] MA Zhi-Wei, LU Xing-Qiang. An Island Coalescence Scenario for Near-Earth Current Disruption in the Magnetotail[J]. Chin. Phys. Lett., 2009, 26(8): 1310-1313
[12] GAO Hong, , YU Qing-Quan. Heat Diffusion across a Strong Stochastic Magnetic Field in Tokamak Plasmas[J]. Chin. Phys. Lett., 2009, 26(6): 1310-1313
[13] WANG Xiao-Jie, LIU Fu-Kun, ZHAO Lian-Min, JIA Hua, LIU Hong-Bao, KUANGGuang-Li. Design of a TE10-TE30 Rectangular Mode Converter for 4.6GHz LHCD Launcher in the Experimental Advanced Superconducting Tokamak[J]. Chin. Phys. Lett., 2009, 26(2): 1310-1313
[14] XIONG Ming, PENG Zhong, HU You-Qiu, ZHENG Hui-Nan. Response of the Earth's Magnetosphere and Ionosphere to Solar Wind Driver and Ionosphere Load: Results of Global MHD Simulations[J]. Chin. Phys. Lett., 2009, 26(1): 1310-1313
[15] 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]. Chin. Phys. Lett., 2008, 25(7): 1310-1313
Viewed
Full text


Abstract