Muraglia, M. ; Agullo, O. ; Benkadda, S. ; Garbet, X. ; Beyer, P. ; Sen, A. (2000) Nonlinear dynamics of magnetic islands imbedded in Small-Scale Turbulence Physical Review Letters, 103 (14). p. 145001. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v103/i14/e145001
Related URL: http://dx.doi.org/10.1103/PhysRevLett.103.145001
Abstract
The nonlinear dynamics of magnetic tearing islands imbedded in a pressure gradient driven turbulence is investigated numerically in a reduced magnetohydrodynamic model. The study reveals regimes where the linear and nonlinear phases of the tearing instability are controlled by the properties of the pressure gradient. In these regimes, the interplay between the pressure and the magnetic flux determines the dynamics of the saturated state. A secondary instability can occur and strongly modify the magnetic island dynamics by triggering a poloidal rotation. It is shown that the complex nonlinear interaction between the islands and turbulence is nonlocal and involves small scales
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 85288 |
| Deposited On: | 02 Mar 2012 07:17 |
| Last Modified: | 02 Mar 2012 07:17 |
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