Vorticity scaling and intermittency in drift-interchange plasma turbulence
Dura, P., Hnat, B., Robinson, J. and Dendy, R. O.. (2012) Vorticity scaling and intermittency in drift-interchange plasma turbulence. Physics of Plasmas, Vol.19 (No.9). Article no. 092301. ISSN 1070-664XFull text not available from this repository.
Official URL: http://dx.doi.org/10.1063/1.4751473
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 > Physics|
|Journal or Publication Title:||Physics of Plasmas|
|Publisher:||American Institute of Physics|
|Page Range:||Article no. 092301|
|Access rights to Published version:||Restricted or Subscription Access|
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