Compound sawtooth in EAST LHCD plasma:An experimental study  

作　　者：徐立清 胡立群 陈开云 李妙辉 

机构地区：[1]Institute of Plasma Physics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2014年第8期396-401,共6页中国物理B（英文版）

基　　金：Project partially supported by the JSPS-NRF-NSFCA3 Foresight Program in the Field of Plasma Physics(NSFC)(Grant No.11261140328);the National Natural Science Foundation of China(Grant No.10935004)

摘　　要：A compound sawtooth with an incomplete relaxation was observed in EAST＇s lower hybrid current drive （LHCD） plasma. The sub-crash phase of the compound sawtooth corresponds to a longer-lasting and slower-growing 1/1 mode. Based on the two-dimensional （2D） SXR tomography, the time-dependent 2D image of a compound sawtooth crash is obtained. The island produced during a resistive internal kink mode is observed in the all crash phases of the compound sawtooth. The destabilization of 1/I long-lasting saturated 1/1 mode is related to the current driven by the LHCD near the q = 1 surface.A compound sawtooth with an incomplete relaxation was observed in EAST＇s lower hybrid current drive （LHCD） plasma. The sub-crash phase of the compound sawtooth corresponds to a longer-lasting and slower-growing 1/1 mode. Based on the two-dimensional （2D） SXR tomography, the time-dependent 2D image of a compound sawtooth crash is obtained. The island produced during a resistive internal kink mode is observed in the all crash phases of the compound sawtooth. The destabilization of 1/I long-lasting saturated 1/1 mode is related to the current driven by the LHCD near the q = 1 surface.

关 键 词：compound sawtooth EAST LHCD plasma 

分 类 号：O53[理学—等离子体物理]