The Library
On the nonlinear coupling between micro turbulence and mesoscale magnetic islands in a plasma
Tools
Hornsby, W. A., Peeters, A. G., Poli, E., Siccinio, M., Snodin, A. P., Casson, F. J. (Francis James), Camenen, Y. and Szepesi, G. (2010) On the nonlinear coupling between micro turbulence and mesoscale magnetic islands in a plasma. Europhysics Letters (EPL), Vol.91 (No.4). Article: 45001. doi:10.1209/0295-5075/91/45001 ISSN 0295-5075.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1209/0295-5075/91/45001
Abstract
The interaction between small-scale turbulence (of the order of the ion Larmor radius) and mesoscale magnetic islands is investigated within the gyrokinetic framework. Turbulence, driven by background temperature and density gradients, over nonlinear mode coupling, pumps energy into long-wavelength modes, and can result in an electrostatic vortex mode that coincides with the magnetic island. The strength of the vortex is strongly enhanced by the modified plasma flow response connected with the change in topology, and the transport it generates can compete with the parallel motion along the perturbed magnetic field. Density and temperature gradients inside the island are below the threshold for turbulence generation, and the anomalous transport inside the island is determined by turbulence spreading. A finite radial temperature gradient inside the island is observed to persist despite the fast motion along the field, and is related to the trapped particles which do not move along the field around the island. Consequences for the stability of the neo-classical tearing mode are discussed. Copyright (C) EPLA, 2010
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Europhysics Letters (EPL) | ||||
Publisher: | Institute of Physics Publishing Ltd. | ||||
ISSN: | 0295-5075 | ||||
Official Date: | August 2010 | ||||
Dates: |
|
||||
Volume: | Vol.91 | ||||
Number: | No.4 | ||||
Number of Pages: | 5 | ||||
Page Range: | Article: 45001 | ||||
DOI: | 10.1209/0295-5075/91/45001 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), UKAEA/Euratom via Mobility |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |