Properties of toroidal Alfvén eigenmode in DIII-D plasma

Wang, Zhixuan; Lin, Zhihong; Holod, Ihor; Heidbrink, W. W.; Deng, Wenjun; Xiao, Y.; Zhang, H.; Zhang, W.; Van Zeeland, M.

doi:10.1063/1.4908274

Properties of toroidal Alfvén eigenmode in DIII-D plasma

Journal Article · Sun Feb 15 04:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4908274· OSTI ID:22408104

Wang, Zhixuan; Lin, Zhihong; Holod, Ihor; Heidbrink, W. W. ^[1]; Deng, Wenjun ^[2]; Xiao, Y. ^[3]; Zhang, H. ^[4]; Zhang, W. ^[5]; Van Zeeland, M. ^[6]

University of California, Irvine, California 92697 (United States)
Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451 (United States)
Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou, Zhejiang 310058 (China)
Fusion Simulation Center, Peking University, Beijing 100871 (China)
Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
General Atomics, San Diego, California 92121 (United States)

Linear properties of the toroidal Alfvén eigenmode (TAE) excited by energetic particles (EP) in a DIII-D tokamak experiment have been studied in global gyrokinetic particle simulations treating self-consistently kinetic effects of EP, thermal ions, and electrons. Simulation results of the TAE frequency and mode structure agree very well with the experimental measurements. The non-perturbative EP contribution induces a radial localization of the TAE mode structure, a break-down of mode radial symmetry, as well as a frequency dependence on the toroidal mode number. The simulations further demonstrate the dependence of the growth rate and mode structure on EP pressure gradients. The in-out asymmetry of the mode structure and the experimental identification of the poloidal harmonics have also been clarified.

OSTI ID:: 22408104

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 22; ISSN PHPAEN; ISSN 1070-664X

Country of Publication:: United States

Language:: English

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Properties of toroidal Alfvén eigenmode in DIII-D plasma

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