Global simulations of tokamak microturbulence: finite beta effects and collisions

In this paper, we present global nonlinear gyrokinetic simulations including finite beta effects and collisions in tokamak geometry. Global electromagnetic simulations using conventional delta-f particle in cell methods are very demanding, with respect to numerical resources, in order to correctly describe the evolution of the non-adiabatic part of the electron distribution function. This difficulty has been overcome using an appropriate adjustable control variate method in the conventional delta-f scheme. Linearized inter-species and like-species collision operators have also been introduced in the model. The inclusion of the collisional dynamics makes it possible to carry out simulations of microturbulence starting from a global neoclassical equilibrium and to study the effect of collisions on the transport induced by electrostatic microinstabilities.


Published in:
Plasma Physics and Controlled Fusion, 53, 124027
Year:
2011
Publisher:
Institute of Physics
ISSN:
0741-3335
Keywords:
Note:
2011 IOP Publishing Ltd
Laboratories:
SPC
CRPP


Note: The status of this file is: Involved Laboratories Only


 Record created 2012-03-29, last modified 2018-01-28

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