Magnetic island formation and rotation braking induced by low-Z impurity penetration in an EAST plasma

Zeng, Shiyong; Zhu, Ping; Zhou, Ruijie; Xu, Ming

doi:10.1088/1741-4326/acbdab

Title: Magnetic island formation and rotation braking induced by low-Z impurity penetration in an EAST plasma

Journal Article · 05 March 2023 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/acbdab · OSTI ID:1961421

;

; Zhou, Ruijie;

Abstract Recent observations of the successive formations of the $4 / 1, 3 / 1$ , and $2 / 1$ magnetic islands as well as the subsequent braking of the $2 / 1$ mode during a low- Z impurity penetration process in EAST experiments are well reproduced in our 3 D resistive MHD simulations. The enhanced parallel current perturbation induced by impurity radiation predominately contributes to the tearing mode growth, and the $2 / 1$ island rotation is mainly damped by the impurity accumulation as results of the influence from high n modes.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: Fundamental Research Funds for the Central Universities; National Key R&D Program of China; National Natural Science Foundation of China (NSFC); USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: FG02-86ER53218; SC0018001

OSTI ID:: 1961421

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 4 Vol. 63; ISSN 0029-5515

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: IAEA

Language:: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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Title: Magnetic island formation and rotation braking induced by low-Z impurity penetration in an EAST plasma

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