Nonlinear dynamics of multiple neoclassical tearing modes in tokamaks

被引：5
作者：
Chandra, D. [1 ]
Agullo, O. [2 ]
Benkadda, S. [2 ]
Garbet, X. [3 ]
Sen, A. [1 ]
机构：
[1] Inst Plasma Res, Bhat 382428, Gandhinagar, India
[2] Univ Provence, France Japan Magnet Fus Lab, LIA 336, CNRS,Lab PIIM,UMR 6633, F-13397 Marseille, France
[3] CEA Cadarache, Assoc Euratom, DRFC, CEA, F-13108 St Paul Les Durance, France
来源：
PHYSICS OF PLASMAS | 2013年 / 20卷 / 04期
关键词：
ISLAND; LIMITS; FLOWS;
D O I：
10.1063/1.4799823
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Numerical simulations investigating the interaction of co-existent 2/1 and 3/1 neoclassical tearing modes are presented. The results obtained from an initial value 3D toroidal code that solves a set of generalized reduced MHD equations exhibit a host of complex phenomena arising from the coupling of the two modes. These include a modification of the island saturation widths of the two modes, a significant modification in the perpendicular flow patterns in the vicinity of the islands, and the excitation of geodesic acoustic mode like oscillations that lead to concomitant oscillations in the kinetic and magnetic energies of the islands. These oscillations only occur in the presence of the neoclassical stress tensor contribution and are absent for two coupled classical tearing modes. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4799823]
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页数：8
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