Dura, P., Hnat, B., Robinson, J. R. and Dendy, R. O. (2012) Vorticity scaling and intermittency in drift-interchange plasma turbulence. Physics of Plasmas, Vol.19 (No.9). Article no. 092301. doi:10.1063/1.4751473 ISSN 1070-664X.

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Abstract

The effects of spatially varying magnetic field strength on the scaling properties of plasma turbulence, modelled by an extended form of Hasegawa-Wakatani model, are investigated. We study changes in the intermittency of the velocity, density, and vorticity fields, as functions of the magnetic field inhomogeneity C = −∂ ln B/∂x. While the velocity fluctuations are always self-similar and their scaling is unaffected by the value of C, the intermittency levels in density and vorticity change with parameter C, reflecting morphological changes in the coherent structures due to the interchange mechanism. Given the centrality of vorticity in conditioning plasma transport, this result is of interest in scaling the results of transport measurements and simulations in tokamak edge plasmas, where drift-interchange turbulence in the presence of a magnetic field gradient is likely to occur.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Physics of Plasmas
Publisher:	American Institute of Physics
ISSN:	1070-664X
Official Date:	2012
Dates:	Date Event 2012 Published
Volume:	Vol.19
Number:	No.9
Page Range:	Article no. 092301
DOI:	10.1063/1.4751473
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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