Compound sawtooth in EAST LHCD plasma：An experimental study

doi:10.1088/1674-1056/23/8/085201

Abstract 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 1/1 long-lasting saturated 1/1 mode is related to the current driven by the LHCD near the q=1 surface.

Keywords: compound sawtooth EAST LHCD plasma

Received: 17 October 2013
Revised: 06 March 2014
Accepted manuscript online:

PACS:	52.35.Py	(Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))
	52.70.La	(X-ray and γ-ray measurements)
	52.55.Tn	(Ideal and resistive MHD modes; kinetic modes)
	52.55.Fa	(Tokamaks, spherical tokamaks)

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

Corresponding Authors: Xu Li-Qing
E-mail: lqxu@ipp.cas.cn

Cite this article:

Xu Li-Qing (徐立清), Hu Li-Qun (胡立群), Chen Kai-Yun (陈开云), Li Miao-Hui (李妙辉) Compound sawtooth in EAST LHCD plasma：An experimental study 2014 Chin. Phys. B 23 085201

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Compound sawtooth in EAST LHCD plasma：An experimental study

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