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Particle pinch and collisionality in gyrokinetic simulations of tokamak plasma turbulence
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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 1070-664X
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Official URL: http://dx.doi.org/10.1063/1.3155498
Abstract
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 |
| ISSN: | 1070-664X |
| Date: | June 2009 |
| Volume: | Vol.16 |
| Number: | No.6 |
| Number of Pages: | 4 |
| Page Range: | Article no. 060702 |
| Identification Number: | 10.1063/1.3155498 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/27678 |
Data sourced from Thomson Reuters' Web of Knowledge
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