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Gyrokinetic simulations of spherical tokamaks
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(2009) Gyrokinetic simulations of spherical tokamaks. In: 36th European Physical Society Conference on Plasma Physics, Natl Palace Culture, Sofia, Bilgaria, June 29-July 03, 2009. Published in: Plasma Physics and Controlled Fusion, Vol.51 (No.12). Article no. 124020. ISSN 0741-3335. doi:10.1088/0741-3335/51/12/124020
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Official URL: http://dx.doi.org/10.1088/0741-3335/51/12/124020
Abstract
This paper reviews transport and confinement in spherical tokamaks (STs) and our current physics understanding of this that is partly based on gyrokinetic simulations. Equilibrium flow shear plays an important role, and we show how this is consistently included in the gyrokinetic framework for flows that greatly exceed the diamagnetic velocity. The key geometry factors that influence the effectiveness of turbulence suppression by flow shear are discussed, and we show that toroidal equilibrium flow shear can sometimes entirely suppress ion scale turbulence in today's STs. Advanced nonlinear simulations of electron temperature gradient (ETG) driven turbulence, including kinetic ion physics, collisions and equilibrium flow shear, support the model that ETG turbulence can explain electron heat transport in many ST discharges.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Plasma Physics and Controlled Fusion | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0741-3335 | ||||
| Official Date: | December 2009 | ||||
| Dates: |
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| Volume: | Vol.51 | ||||
| Number: | No.12 | ||||
| Number of Pages: | 11 | ||||
| Page Range: | Article no. 124020 | ||||
| DOI: | 10.1088/0741-3335/51/12/124020 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | UK Engineering and Physical Sciences Research Council, European Communities, Leverhulme Trust Network | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 36th European Physical Society Conference on Plasma Physics | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Natl Palace Culture, Sofia, Bilgaria | ||||
| Date(s) of Event: | June 29-July 03, 2009 |
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