Gyrokinetic simulations of spherical tokamaks
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...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2009
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| _version_ | 1797051775591645184 |
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| author | Roach, C Abel, I Akers, R Arter, W Barnes, M Camenen, Y Casson, F Colyer, G Connor, J Cowley, S Dickinson, D Dorland, W Field, A Guttenfelder, W Hammett, G Hastie, R Highcock, E Loureiro, N Peeters, A Reshko, M Saarelma, S Schekochihin, A Valovic, M Wilson, H |
| author_facet | Roach, C Abel, I Akers, R Arter, W Barnes, M Camenen, Y Casson, F Colyer, G Connor, J Cowley, S Dickinson, D Dorland, W Field, A Guttenfelder, W Hammett, G Hastie, R Highcock, E Loureiro, N Peeters, A Reshko, M Saarelma, S Schekochihin, A Valovic, M Wilson, H |
| author_sort | Roach, C |
| collection | OXFORD |
| description | 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. © 2009 IOP Publishing Ltd. |
| first_indexed | 2024-03-06T18:24:17Z |
| format | Journal article |
| id | oxford-uuid:07608898-3dbc-4845-b456-44935097d675 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:24:17Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:07608898-3dbc-4845-b456-44935097d6752022-03-26T09:07:19ZGyrokinetic simulations of spherical tokamaksJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:07608898-3dbc-4845-b456-44935097d675EnglishSymplectic Elements at Oxford2009Roach, CAbel, IAkers, RArter, WBarnes, MCamenen, YCasson, FColyer, GConnor, JCowley, SDickinson, DDorland, WField, AGuttenfelder, WHammett, GHastie, RHighcock, ELoureiro, NPeeters, AReshko, MSaarelma, SSchekochihin, AValovic, MWilson, HThis 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. © 2009 IOP Publishing Ltd. |
| spellingShingle | Roach, C Abel, I Akers, R Arter, W Barnes, M Camenen, Y Casson, F Colyer, G Connor, J Cowley, S Dickinson, D Dorland, W Field, A Guttenfelder, W Hammett, G Hastie, R Highcock, E Loureiro, N Peeters, A Reshko, M Saarelma, S Schekochihin, A Valovic, M Wilson, H Gyrokinetic simulations of spherical tokamaks |
| title | Gyrokinetic simulations of spherical tokamaks |
| title_full | Gyrokinetic simulations of spherical tokamaks |
| title_fullStr | Gyrokinetic simulations of spherical tokamaks |
| title_full_unstemmed | Gyrokinetic simulations of spherical tokamaks |
| title_short | Gyrokinetic simulations of spherical tokamaks |
| title_sort | gyrokinetic simulations of spherical tokamaks |
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