Kinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap current
We consider the effects of a finite radial electric field on ion orbits in a subsonic pedestal. Using a procedure that makes a clear distinction between a transit average and a flux surface average we are able to solve the kinetic equation to retain the modifications due to finite E→ × B→ drift orbi...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2013
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| _version_ | 1797050296391696384 |
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| author | Catto, P Parra, F Kagan, G Parker, J Pusztai, I Landreman, M |
| author_facet | Catto, P Parra, F Kagan, G Parker, J Pusztai, I Landreman, M |
| author_sort | Catto, P |
| collection | OXFORD |
| description | We consider the effects of a finite radial electric field on ion orbits in a subsonic pedestal. Using a procedure that makes a clear distinction between a transit average and a flux surface average we are able to solve the kinetic equation to retain the modifications due to finite E→ × B→ drift orbit departures from flux surfaces. Our approach properly determines the velocity space localized, as well as the nonlocal, portion of the ion distribution function in the banana and plateau regimes in the small aspect ratio limit. The rapid variation of the poloidal ion flow coefficient and the electrostatic potential in the total energy modify previous banana regime evaluations of the ion flow, the bootstrap current, and the radial ion heat flux in a subsonic pedestal. In the plateau regime, the rapid variation of the poloidal flow coefficient alters earlier results for the ion flow and bootstrap current, while leaving the ion heat flux unchanged since the rapid poloidal variation of the total energy was properly retained. © 2013 IOP Publishing Ltd. |
| first_indexed | 2024-03-06T18:03:05Z |
| format | Journal article |
| id | oxford-uuid:007bc103-3b0c-4dca-a388-6a6d1eeb27b5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:03:05Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:007bc103-3b0c-4dca-a388-6a6d1eeb27b52022-03-26T08:29:44ZKinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap currentJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:007bc103-3b0c-4dca-a388-6a6d1eeb27b5EnglishSymplectic Elements at Oxford2013Catto, PParra, FKagan, GParker, JPusztai, ILandreman, MWe consider the effects of a finite radial electric field on ion orbits in a subsonic pedestal. Using a procedure that makes a clear distinction between a transit average and a flux surface average we are able to solve the kinetic equation to retain the modifications due to finite E→ × B→ drift orbit departures from flux surfaces. Our approach properly determines the velocity space localized, as well as the nonlocal, portion of the ion distribution function in the banana and plateau regimes in the small aspect ratio limit. The rapid variation of the poloidal ion flow coefficient and the electrostatic potential in the total energy modify previous banana regime evaluations of the ion flow, the bootstrap current, and the radial ion heat flux in a subsonic pedestal. In the plateau regime, the rapid variation of the poloidal flow coefficient alters earlier results for the ion flow and bootstrap current, while leaving the ion heat flux unchanged since the rapid poloidal variation of the total energy was properly retained. © 2013 IOP Publishing Ltd. |
| spellingShingle | Catto, P Parra, F Kagan, G Parker, J Pusztai, I Landreman, M Kinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap current |
| title | Kinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap current |
| title_full | Kinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap current |
| title_fullStr | Kinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap current |
| title_full_unstemmed | Kinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap current |
| title_short | Kinetic effects on a tokamak pedestal ion flow, ion heat transport and bootstrap current |
| title_sort | kinetic effects on a tokamak pedestal ion flow ion heat transport and bootstrap current |
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