Particle pinch and collisionality in gyrokinetic simulations of tokamak plasma turbulence
Angioni, C., Candy, J., Fable, E., Maslov, M., Peeters, A. G., Waltz, R. E. and Weisen, H.. (2009) Particle pinch and collisionality in gyrokinetic simulations of tokamak plasma turbulence. Physics of Plasmas, Vol.16 (No.6). Article no. 060702. ISSN 1070-664XFull text not available from this repository.
Official URL: http://dx.doi.org/10.1063/1.3155498
The generic problem of how, in a turbulent plasma, the experimentally relevant conditions of a particle flux very close to the null are achieved, despite the presence of strong heat fluxes, is addressed. Nonlinear gyrokinetic simulations of plasma turbulence in tokamaks reveal a complex dependence of the particle flux as a function of the turbulent spatial scale and of the velocity space as collisionality is increased. At experimental values of collisionality, the particle flux is found close to the null, in agreement with the experiment, due to the balance between inward and outward contributions at small and large scales, respectively. These simulations provide full theoretical support to the prediction of a peaked density profile in a future nuclear fusion reactor.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Physics of Plasmas|
|Publisher:||American Institute of Physics|
|Number of Pages:||4|
|Page Range:||Article no. 060702|
|Access rights to Published version:||Restricted or Subscription Access|
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