Drift kinetic effects on plasma response to resonant magnetic perturbation for EU DEMO design

Zhou, Lina; Liu, Yueqiang; Hu, Hanqing; Siccinio, Mattia; Francesco, Maviglia; Zohm, Hartmut; Pigatto, Leonardo; Wang, Yong; Li, Li; Hao, Guangzhou; Yang, Xu; Zhang, Hanyu; Duan, Ping; Chen, Long

doi:10.1088/1361-6587/acb012

Drift kinetic effects on plasma response to resonant magnetic perturbation for EU DEMO design

Journal Article · 01 February 2023 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/acb012· OSTI ID:2418885

^[1]; ; Hu, Hanqing; Siccinio, Mattia; Francesco, Maviglia; Zohm, Hartmut; ; ; Li, Li; ; Yang, Xu; Zhang, Hanyu; Duan, Ping; Chen, Long

OSTI

Abstract

A systematic investigation of the plasma response to an externally applied resonant magnetic perturbation (RMP) field, for the purpose of controlling edge localized modes, is carried out for an EU DEMO reference plasma. Particular emphasis is placed on the role of kinetic effects associated with both thermal particles and fusion-born alphas. The single fluid, resistive model predicts a large peak amplification of then= 1 (nis the toroidal mode number) plasma response to the target equilibrium, which is found to be close to the Troyon no-wall limit. A more advanced response model, including kinetic resonances between the RMP perturbation and drift motions of thermal and energetic particles, on the other hand, finds a strong suppression of then= 1 field amplification. A major role is played by the precessional drift resonance of fusion-born alphas. A strong parallel sound wave damping model is found to well reproduce the full kinetic response results for the DEMO plasma, in terms of both the resonant field response amplitude and the plasma displacement. Finally, both fluid and kinetic models produce similar responses for then= 2 and 3 RMP fields for the considered DEMO plasma, whilst kinetic effects again become important for then= 4 RMP due to proximity of the reference plasma to the no-wall limit for then= 4 ideal kink instability.

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FC02-04ER54698; FG02-95ER54309

OSTI ID:: 2418885

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 3 Vol. 65; ISSN 0741-3335

Publisher:: IOP Science

Country of Publication:: United States

Language:: English

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