Effect of kinetic ions on the toroidal double-tearing modes

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

doi:10.1088/1674-1056/ac7f89

Effect of kinetic ions on the toroidal double-tearing modes

Journal Article · 31 December 2022 · Chinese Physics B

DOI:https://doi.org/10.1088/1674-1056/ac7f89· OSTI ID:2420685

Zhang, Ruibo ^[1]; Ye, Lei; Chen, Yang; Xiang, Nong; Yang, Xiaoqing

OSTI

We investigate the effects of kinetic ions on double-tearing modes (DTMs) using the gyrokinetic particle-in-cell simulation code GEM with a gyrokinetic ion/fluid electron hybrid model. It is found that the ion kinetic effects can decrease the growth rate of the DTMs. This effect is more significant for stronger coupling of DTMs with smaller distance between the rational surfaces. Kinetic ions can also enhance the coupling effect between the two rational surfaces. Energy transfer analyses between particles and wave fields show that the stabilizing effect of kinetic ions comes mainly from the perpendicular magnetic drift of ions in the coupling region and around the outer rational surface.

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

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: SC0017992; AC02-05CH11231

OSTI ID:: 2420685

Journal Information:: Chinese Physics B, Journal Name: Chinese Physics B Journal Issue: 2 Vol. 32; ISSN 1674-1056

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

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