Momentum injection in tokamak plasmas and transitions to reduced transport.
The effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The transition happens when there is sufficient momentum input so that the velocity shear can suppress or reduce the turbulence....
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2011
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| _version_ | 1797061359099183104 |
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| author | Parra, F Barnes, M Highcock, E Schekochihin, A Cowley, S |
| author_facet | Parra, F Barnes, M Highcock, E Schekochihin, A Cowley, S |
| author_sort | Parra, F |
| collection | OXFORD |
| description | The effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The transition happens when there is sufficient momentum input so that the velocity shear can suppress or reduce the turbulence. However, it is possible to drive too much velocity shear and rekindle the turbulent transport. The optimal level of momentum injection is determined. The reduction in transport is maximized in the regions of low or zero magnetic shear. |
| first_indexed | 2024-03-06T20:29:59Z |
| format | Journal article |
| id | oxford-uuid:30b69a78-2276-477b-b7ef-309f7ed88f6f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:29:59Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:30b69a78-2276-477b-b7ef-309f7ed88f6f2022-03-26T13:03:15ZMomentum injection in tokamak plasmas and transitions to reduced transport.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:30b69a78-2276-477b-b7ef-309f7ed88f6fEnglishSymplectic Elements at Oxford2011Parra, FBarnes, MHighcock, ESchekochihin, ACowley, SThe effect of momentum injection on the temperature gradient in tokamak plasmas is studied. A plausible scenario for transitions to reduced transport regimes is proposed. The transition happens when there is sufficient momentum input so that the velocity shear can suppress or reduce the turbulence. However, it is possible to drive too much velocity shear and rekindle the turbulent transport. The optimal level of momentum injection is determined. The reduction in transport is maximized in the regions of low or zero magnetic shear. |
| spellingShingle | Parra, F Barnes, M Highcock, E Schekochihin, A Cowley, S Momentum injection in tokamak plasmas and transitions to reduced transport. |
| title | Momentum injection in tokamak plasmas and transitions to reduced transport. |
| title_full | Momentum injection in tokamak plasmas and transitions to reduced transport. |
| title_fullStr | Momentum injection in tokamak plasmas and transitions to reduced transport. |
| title_full_unstemmed | Momentum injection in tokamak plasmas and transitions to reduced transport. |
| title_short | Momentum injection in tokamak plasmas and transitions to reduced transport. |
| title_sort | momentum injection in tokamak plasmas and transitions to reduced transport |
| work_keys_str_mv | AT parraf momentuminjectionintokamakplasmasandtransitionstoreducedtransport AT barnesm momentuminjectionintokamakplasmasandtransitionstoreducedtransport AT highcocke momentuminjectionintokamakplasmasandtransitionstoreducedtransport AT schekochihina momentuminjectionintokamakplasmasandtransitionstoreducedtransport AT cowleys momentuminjectionintokamakplasmasandtransitionstoreducedtransport |