Hybrid gyrokinetic ion/fluid electron simulation of toroidal tearing modes

Zhang, Ruibo; Chen, Yang; Ye, Lei; Xiang, Nong

doi:10.1063/5.0067813

Title: Hybrid gyrokinetic ion/fluid electron simulation of toroidal tearing modes

Journal Article · Wed Jan 19 00:00:00 EST 2022 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0067813· OSTI ID:1978965

^[1];

^[2];

^[3]; Xiang, Nong ^[3]

Chinese Academy of Sciences (CAS), Hefei (China); University of Science and Technology of China, Hefei (China)
University of Colorado, Boulder, CO (United States)
Chinese Academy of Sciences (CAS), Hefei (China)

The effects of toroidicity and kinetic ions on the resistive tearing mode are systematically studied with the gyrokinetic particle-in-cell simulation code GEM [Y. Chen and S. E. Parker, J. Comput. Phys. 220, 839 (2007)] and compared with analytic theory. A new field solver in toroidal geometry has been developed for the simulation of low-n (n = 1, 2) modes in tokamaks. It is found that the toroidal effect significantly reduces the growth rate of the tearing mode. The toroidal effect can also increase the radial width of the tearing mode and change the scaling between the radial mode width and resistivity due to the toroidal pressure term in the electron continuity equation. The kinetic effects of ions can decrease the growth rate of the tearing mode. The plasma flux-surface shaping is found to have significant effect on the tearing mode.

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Research Organization:: General Atomics, San Diego, CA (United States); Univ. of California, Oakland, CA (United States); Univ. of Colorado, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National MCF Energy R&D Program of China; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); SciDAC Center Advanced Tokamak Modeling Environment (AToM)

Grant/Contract Number:: SC0017992; AC02-05CH11231; 2019YFE03060000; 2017YFE0300406; 11975272; 11905257

OSTI ID:: 1978965

Alternate ID(s):: OSTI ID: 1841069

Journal Information:: Physics of Plasmas, Vol. 29, Issue 1; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Title: Hybrid gyrokinetic ion/fluid electron simulation of toroidal tearing modes

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