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Chin. Phys. B, 2011, Vol. 20(12): 125202    DOI: 10.1088/1674-1056/20/12/125202
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES Prev   Next  

Investigation of lower hybrid current drive during H-mode in EAST tokamak

Li Miao-Hui, Ding Bo-Jiang, Kong Er-Hua, Zhang Lei, Zhang Xin-Jun, Qian Jin-Ping, Yan Ning, Han Xiao-Feng, Shan Jia-Fang, Liu Fu-Kun, Wang Mao, Xu Han-Dong, Wan Bao-Nian
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Abstract  H-mode discharges with lower hybrid current drive (LHCD) alone are achieved in EAST divertor plasma over a wide parameter range. These H-mode discharges are characterized by a sudden drop in Dα emission and a spontaneous rise in main plasma density. Good lower hybrid (LH) coupling during H-mode is obtained by putting the plasma close to the antenna and by injecting D2 gas from a pipe near the grill mouse. The analysis of lower hybrid current drive properties shows that the LH deposition profile shifts off axis during H-mode, and current drive (CD) efficiency decreases due to the increase in density. Modeling results of H-mode discharges with a general ray tracing code GENRAY are reported.
Keywords:  H-mode      edge localized mode      lower hybrid current drive     
Received:  20 March 2011      Published:  15 December 2011
PACS:  52.50.Sw (Plasma heating by microwaves; ECR, LH, collisional heating)  
  52.65.Ff (Fokker-Planck and Vlasov equation)  
  52.40.Db (Electromagnetic (nonlaser) radiation interactions with plasma)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10875149 and 10805057) and the National Magnetic Confinement Fusion Science Program of China (Grant No. 2010GB105004).

Cite this article: 

Li Miao-Hui, Ding Bo-Jiang, Kong Er-Hua, Zhang Lei, Zhang Xin-Jun, Qian Jin-Ping, Yan Ning, Han Xiao-Feng, Shan Jia-Fang, Liu Fu-Kun, Wang Mao, Xu Han-Dong, Wan Bao-Nian Investigation of lower hybrid current drive during H-mode in EAST tokamak 2011 Chin. Phys. B 20 125202

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