Properties of toroidal Alfvén eigenmode in DIII-D plasma

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

doi:10.1063/1.4908274

Title: Properties of toroidal Alfvén eigenmode in DIII-D plasma

Journal Article · Thu Feb 19 00:00:00 EST 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4908274· OSTI ID:1565338

^[1];

^[2]; Holod, Ihor ^[1]; Heidbrink, W. W. ^[1]; Xiao, Y. ^[3]; Zhang, H. ^[4]; Zhang, W. ^[5]; Van Zeeland, M. ^[6]

Univ. of California, Irvine, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Zhejiang Univ. (China)
Peking Univ., Beijing (China)
Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Science and Technology of China, Hefei (China)
General Atomics, San Diego, CA (United States)

Here, linear properties of the toroidal Alfvén eigenmode (TAE) excited by energetic particles (EP) in a DIII-D tokamak experiment have been examined 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 exhibit 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 observed.

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Research Organization:: Univ. of California, Oakland, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725

OSTI ID:: 1565338

Alternate ID(s):: OSTI ID: 1228132

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

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 22 works

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