Investigation of core MHD activities in the high β<sub>N</sub> plasmas in EAST

Xiang Zhu
(Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Prov)

Authors:

Xiang Zhu
(Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Prov)

Long Zeng
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Haiqing Liu
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Guoqiang Li
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Muquan Wu
(Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Prov)

Di Jiang
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, University of Science and Technology of China, Hefei 230029, China)

Hao Qu
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, University of Science and Technology of China, Hefei 230029, China)

Qing Zang
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Bo Lyu
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Yao Yang
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Yinxian Jie
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Xiang Gao
(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China, Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China)

Improved H-mode plasmas with high normalized beta (β_N > 1.6) have been achieved on EAST tokamak. Weak temperature and density internal transport barriers (ITB) were observed. The main focus is on the influence of the core MHD activities, including fishbones and sawteeth on plasma performance. The electron temperature and the density profile evolutions show both temperature and density ITB maintained during the fishbone activities. Detailed comparisons of the kinetic profiles show trivial changes in the core region during fishbone activities but significant decrease due to sawteeth crash, which also gives possibility to trigger neoclassical tearing modes (NTMs). The safety factor (q) profile, confined by the Faraday rotation measurements from the polarimeter/interferometer (POINT) system on EAST, represents that a flat q profile with q₀ close to unity can be maintained and a 1/1 fishbone simultaneously exist. Detailed discussions of plasma performance under the same external control parameters will be studied and discussed.

*This work was supported by the National Magnetic Confinement Fusion Program of China with contract No. 2014GB106002 and No. 2014GB106003 and the National Nature Science Foundation of China with contract No. 11675211, No. 11775267 and No. 11475221.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.PP11.67

About APS

The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.

Headquarters 1 Physics Ellipse, College Park, MD 20740-3844 (301) 209-3200
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700

Bulletin of the American Physical Society

60th Annual Meeting of the APS Division of Plasma Physics

Volume 63, Number 11

Monday–Friday, November 5–9, 2018; Portland, Oregon

Session PP11: Poster Session VI: Relativistic Laser Plasma Interaction and Beam Physics; Boundary; MHD and Stability, Transients; FRC; Dusty Plasmas; Basic Studies; Computational and Diagnostic Methods (2:00pm-5:00pm)

Abstract: PP11.00067 : Investigation of core MHD activities in the high βN plasmas in EAST*

Presenter:

Authors:

Follow Us

Engage

My APS

Information for

About APS

Abstract: PP11.00067 : Investigation of core MHD activities in the high β_N plasmas in EAST*