Plasma turbulence in the scrape-off layer of tokamak devices

Plasma turbulence is explored in the scrape-off layer of tokamak devices using three-dimensional global two-fluid simulations. Two transport regimes are discussed: one in which the turbulent fluctuations saturate nonlinearly due to the Kelvin-Helmholtz instability, and another in which the fluctuations saturate due to a local flattening of the plasma gradients and associated removal of the linear instability drive. Focusing on the latter regime, analytical estimates of the cross-field transport and plasma profile gradients are obtained that display Bohm-scaling diffusion properties. [http://dx.doi.org/10.1063/1.4789551]


Published in:
Physics of Plasmas, 20, 1, 010702
Year:
2013
Publisher:
Melville, American Institute of Physics
ISSN:
1070-664X
Keywords:
Laboratories:
SPC
CRPP




 Record created 2013-01-29, last modified 2018-09-13

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