Toroidal modelling of core plasma flow damping by RMP fields in hybrid discharge on ASDEX upgrade
| العنوان: | Toroidal modelling of core plasma flow damping by RMP fields in hybrid discharge on ASDEX upgrade |
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| المؤلفون: | J.Q. Li, Guangzhou Hao, N. Zhang, L. Liu, D.L. Yu, Shuo Wang, G.Q. Dong, V. Igochine, W.J. Chen, Yueqiang Liu, P. Piovesan, Guoliang Xia, X. Bai |
| المساهمون: | HL-2A Team, ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society, EUROfusion MST1 Team |
| المصدر: | Nuclear Fusion Nuclear fusion 60 (2020): 096006-1–096006-14. doi:10.1088/1741-4326/ab9dce info:cnr-pdr/source/autori:Zhang N.; Liu Y.Q.; Piovesan P.; Igochine V.; Yu D.L.; Wang S.; Dong G.Q.; Hao G.Z.; Xia G.L.; Chen W.J.; Liu L.; Li J.Q.; Bai X./titolo:Toroidal modelling of core plasma flow damping by RMP fields in hybrid discharge on ASDEX upgrade/doi:10.1088%2F1741-4326%2Fab9dce/rivista:Nuclear fusion/anno:2020/pagina_da:096006-1/pagina_a:096006-14/intervallo_pagine:096006-1–096006-14/volume:60 |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Nuclear and High Energy Physics, Toroid, NTV torque, Flow (psychology), Mechanics, Plasma, Condensed Matter Physics, 01 natural sciences, 010305 fluids & plasmas, RMP fields, Core (optical fiber), Flow velocity, ASDEX Upgrade, Electromagnetic coil, Physics::Plasma Physics, Beta (plasma physics), 0103 physical sciences, core flow damping, internal kink response, 010306 general physics |
| الوصف: | In ASDEX Upgrade hybrid discharges, it is found that an externally applied n = 1 field preferentially distorts the plasma in the core, leading to significant flow damping there and elsewhere across the plasma radius. MARS-F/Q modeling of a neoclassical toroidal viscous NTV) torque that results from an amplified internal kink-type displacement in the plasma core is qualitatively consistent with the measured internal displacements, beta dependence, and rotation damping. Sensitivity studies indicate that the internal kink response and the resulting core flow damping critically depend on the plasma equilibrium pressure, the initial flow speed, the coil phasing and the proximity of q0 to 1. No appreciable flow damping is found for a βN plasma. A relatively slower initial toroidal flow results in a stronger core flow damping, due to the enhanced NTV torque. Weaker flow damping is achieved as q0 is assumed to be farther away from 1. Finally, a systematic coil phasing scan finds the strongest (weakest) flow damping occurring at the coil phasing of approximately 20 (200) degrees, quantitatively agreeing with experiments. This study points to the important role played by the internal kink response in plasma core flow damping in high-beta hybrid scenario plasmas such as that foreseen for ITER. |
| وصف الملف: | application/pdf |
| تدمد: | 0029-5515 0741-3335 |
| DOI: | 10.1088/1741-4326/ab9dce |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::072b550d402d3a264ba7b390941a30a4 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....072b550d402d3a264ba7b390941a30a4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00295515 07413335 |
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| DOI: | 10.1088/1741-4326/ab9dce |