Energetic particles and multi-scale dynamics in fusion plasmas

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/104576

Title:	Energetic particles and multi-scale dynamics in fusion plasmas
Authors:	陳騮;Zonca, F;Chen, L;Briguglio, S;Fogaccia, G;Milovanov, A V;Qiu, Z;Vlad, G;Wang, X
Contributors:	理學院物理學系
Keywords:	Alfv�n waves;BGK modes;Energetic particles;EPS;Excitation;fast particle effects;Fluctuation;fusion plasmas;Instability;nonlinear phenomena;phase locking;Plasma equilibrium;Plasmas;Saws;solitons
Date:	2015-01-01
Issue Date:	2026-04-23 11:52:56 (UTC+8)
Publisher:	IOP Publishing Ltd.;IOP Publishing
Abstract:	摘要： The role of energetic particles (EPs) in fusion plasmas is unique as they could act as mediators of cross-scale couplings. More specifically, EPs can drive instabilities on the macro- and meso-scales and intermediate between the microscopic thermal ion Larmor radius and the macroscopic plasma equilibrium scale lengths. On one hand, EP driven shear Alfvén waves (SAWs) could provide a nonlinear feedback onto the macro-scale system via the interplay of plasma equilibrium and fusion reactivity profiles. On the other hand, EP-driven instabilities could also excite singular radial mode structures at SAW continuum resonances, which, by mode conversion, yield microscopic fluctuations that may propagate and be absorbed elsewhere, inducing nonlocal behaviors. The above observations thus suggest that a theoretical approach based on advanced kinetic treatment of both EPs and thermal plasma is more appropriate for burning fusion plasmas. Energetic particles, furthermore, may linearly and nonlinearly (via SAWs) excite zonal structures, acting, thereby, as generators of nonlinear equilibria that generally evolve on the same time scale of the underlying fluctuations. These issues are presented within a general theoretical framework, discussing evidence from both numerical simulation results and experimental observations. Analogies of fusion plasmas dynamics with problems in condensed matter physics, nonlinear dynamics, and accelerator physics are also emphasized. 其他題名： PPCF 其他題名： Plasma Phys. Control. Fusion 出版者： IOP Publishing 出版日期： 2015-01-01 出處： Plasma physics and controlled fusion, 2015-01, Vol.57 (1), p.14024-10 資源來源： Institute of Physics Journals 版權： 2015 IOP Publishing Ltd 識別號： ISSN: 0741-3335 識別號： EISSN: 1361-6587 識別號： DOI: 10.1088/0741-3335/57/1/014024 識別號： CODEN: PLPHBZ
Appears in Collections:	[Department of Physics] journal & Dissertation

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