Poli, E., Bottino, A., Hornsby, W. A., Peeters, A. G., Ribeiro, T., Scott, B. D. and Siccinio, M. (2010) Gyrokinetic and gyrofluid investigation of magnetic islands in tokamaks. In: 37th European-Physical-Society-Conference-on-Plasma-Physics, Univ Campus, Helix Arts Ctr, Dublin, Ireland, June 22-25, 2010. Published in: Plasma Physics and Controlled Fusion, Vol.52 (No.12). Article: 124021.

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Abstract

The evolution of a tearing mode is a multi-scale problem, involving lengths from below the ion gyroradius up to the dimensions of the system. The effects due to finite ion Larmor radius on the island dynamics are investigated by means of numerical gyrokinetic and gyrofluid simulations in tokamak geometry. In gyrokinetic runs, the magnetic island is prescribed. The coupling induced by a static island between small and large scale fluctuations in the case of electrostatic turbulence is discussed and the role of the perturbed magnetic geometry on the electron response is highlighted. Simulations in the presence of a rotating island, excluding background turbulence, allow a clear, self-consistent determination of the electrostatic potential associated with the island rotation and of the relevant plasma profiles for arbitrary island widths. Finally, the first gyrofluid simulations showing the growth of an island in the presence of electromagnetic turbulence for parameters typical of a mid-size tokamak are presented.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Plasma Physics and Controlled Fusion
Publisher:	Institute of Physics Publishing Ltd.
ISSN:	0741-3335
Official Date:	December 2010
Volume:	Vol.52
Number:	No.12
Number of Pages:	17
Page Range:	Article: 124021
Identification Number:	10.1088/0741-3335/52/12/124021
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Title of Event:	37th European-Physical-Society-Conference-on-Plasma-Physics
Type of Event:	Conference
Location of Event:	Univ Campus, Helix Arts Ctr, Dublin, Ireland
Date(s) of Event:	June 22-25, 2010
URI:	http://wrap.warwick.ac.uk/id/eprint/4776

Data sourced from Thomson Reuters' Web of Knowledge

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