Stellarator bootstrap current and plasma flow velocity at low collisionality
The bootstrap current and flow velocity of a low-collisionality stellarator plasma are calculated. As far as possible, the analysis is carried out in a uniform way across all low-collisionality regimes in general stellarator geometry, assuming only that the confinement is good enough that the plasma...
| Main Authors: | , , |
|---|---|
| Format: | Journal article |
| Published: |
Cambridge University Press
2017
|
| _version_ | 1826257600230981632 |
|---|---|
| author | Helander, P Parra, F Newton, S |
| author_facet | Helander, P Parra, F Newton, S |
| author_sort | Helander, P |
| collection | OXFORD |
| description | The bootstrap current and flow velocity of a low-collisionality stellarator plasma are calculated. As far as possible, the analysis is carried out in a uniform way across all low-collisionality regimes in general stellarator geometry, assuming only that the confinement is good enough that the plasma is approximately in local thermodynamic equilibrium. It is found that conventional expressions for the ion flow speed and bootstrap current in the low-collisionality limit are accurate only in the $1/\nu$-collisionality regime and need to be modified in the $\sqrt{\nu}$-regime. The correction due to finite collisionality is also discussed and is found to scale as $\nu^{2/5}$. |
| first_indexed | 2024-03-06T18:20:45Z |
| format | Journal article |
| id | oxford-uuid:0633c940-e99e-440a-ad62-317443990a9d |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:20:45Z |
| publishDate | 2017 |
| publisher | Cambridge University Press |
| record_format | dspace |
| spelling | oxford-uuid:0633c940-e99e-440a-ad62-317443990a9d2022-03-26T09:01:17ZStellarator bootstrap current and plasma flow velocity at low collisionalityJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0633c940-e99e-440a-ad62-317443990a9dSymplectic Elements at OxfordCambridge University Press2017Helander, PParra, FNewton, SThe bootstrap current and flow velocity of a low-collisionality stellarator plasma are calculated. As far as possible, the analysis is carried out in a uniform way across all low-collisionality regimes in general stellarator geometry, assuming only that the confinement is good enough that the plasma is approximately in local thermodynamic equilibrium. It is found that conventional expressions for the ion flow speed and bootstrap current in the low-collisionality limit are accurate only in the $1/\nu$-collisionality regime and need to be modified in the $\sqrt{\nu}$-regime. The correction due to finite collisionality is also discussed and is found to scale as $\nu^{2/5}$. |
| spellingShingle | Helander, P Parra, F Newton, S Stellarator bootstrap current and plasma flow velocity at low collisionality |
| title | Stellarator bootstrap current and plasma flow velocity at low collisionality |
| title_full | Stellarator bootstrap current and plasma flow velocity at low collisionality |
| title_fullStr | Stellarator bootstrap current and plasma flow velocity at low collisionality |
| title_full_unstemmed | Stellarator bootstrap current and plasma flow velocity at low collisionality |
| title_short | Stellarator bootstrap current and plasma flow velocity at low collisionality |
| title_sort | stellarator bootstrap current and plasma flow velocity at low collisionality |
| work_keys_str_mv | AT helanderp stellaratorbootstrapcurrentandplasmaflowvelocityatlowcollisionality AT parraf stellaratorbootstrapcurrentandplasmaflowvelocityatlowcollisionality AT newtons stellaratorbootstrapcurrentandplasmaflowvelocityatlowcollisionality |