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A unified treatment of kinetic effects in a tokamak pedestal

Peter J. Catto ; Grigory Kagan ; Matt Landreman ; István Pusztai (Institutionen för teknisk fysik, Nukleär teknik)
Plasma Physics and Controlled Fusion (0741-3335). Vol. 53 (2011), p. 054004.
[Artikel, refereegranskad vetenskaplig]

We consider the effects of a finite pedestal radial electric field on ion orbits using a unified approach. We then employ these modified orbit results to retain finite E×B drift departures from flux surfaces in an improved drift-kinetic equation. The procedure allows us to make a clear distinction between transit averages and flux surface averages when solving this kinetic equation. The technique outlined here is intended to clarify and unify recent evaluations of the banana regime decrease and plateau regime alterations in the ion heat diffusivity; the reduction and possible reversal of the poloidal flow in the banana regime, and its augmentation in the plateau regime; the increase in the bootstrap current; and the enhancement of the residual zonal flow regulation of turbulence.

Nyckelord: neoclassical transport, fusion plasma, tokamak, plateau regime, banana regime, transport barrier, zonal flow



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Denna post skapades 2011-04-08. Senast ändrad 2015-07-28.
CPL Pubid: 138828

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)

Ämnesområden

Energi
Plasmafysik
Fusion

Chalmers infrastruktur