Observation of oscillatory radial electric field relaxation in a helical plasma
Measurements of the relaxation of a zonal electrostatic potential perturbation in a non-axisymmetric magnetically confined plasma are presented. A sudden perturbation of the plasma equilibrium is induced by the injection of a cryogenic hydrogen pellet in the TJ-II stellarator, which is observed to b...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Published: |
American Physical Society
2017
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| _version_ | 1797074190726070272 |
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| author | Alonso, J Sanchez, E Calvo, I Velasco, J Perfilov, S Chmyga, A Eliseev, L Krupnik, L Estrada, T Kleiber, R McCarthy, K Melnikov, A Monreal, P Parra Diaz, F Zhezhera, A TJ-II Team |
| author_facet | Alonso, J Sanchez, E Calvo, I Velasco, J Perfilov, S Chmyga, A Eliseev, L Krupnik, L Estrada, T Kleiber, R McCarthy, K Melnikov, A Monreal, P Parra Diaz, F Zhezhera, A TJ-II Team |
| author_sort | Alonso, J |
| collection | OXFORD |
| description | Measurements of the relaxation of a zonal electrostatic potential perturbation in a non-axisymmetric magnetically confined plasma are presented. A sudden perturbation of the plasma equilibrium is induced by the injection of a cryogenic hydrogen pellet in the TJ-II stellarator, which is observed to be followed by a damped oscillation in the electrostatic potential. The waveform of the relaxation is consistent with theoretical calculations of zonal potential relaxation in a non-axisymmetric magnetic geometry. The turbulent transport properties of a magnetic confinement configuration are expected to depend on the features of the collisionless damping of zonal flows, of which the present letter is the first direct observation. |
| first_indexed | 2024-03-06T23:32:45Z |
| format | Journal article |
| id | oxford-uuid:6ca059d8-a858-4a0e-a2c6-21a5333fa080 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:32:45Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:6ca059d8-a858-4a0e-a2c6-21a5333fa0802022-03-26T19:12:11ZObservation of oscillatory radial electric field relaxation in a helical plasmaJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6ca059d8-a858-4a0e-a2c6-21a5333fa080Symplectic Elements at OxfordAmerican Physical Society2017Alonso, JSanchez, ECalvo, IVelasco, JPerfilov, SChmyga, AEliseev, LKrupnik, LEstrada, TKleiber, RMcCarthy, KMelnikov, AMonreal, PParra Diaz, FZhezhera, ATJ-II TeamMeasurements of the relaxation of a zonal electrostatic potential perturbation in a non-axisymmetric magnetically confined plasma are presented. A sudden perturbation of the plasma equilibrium is induced by the injection of a cryogenic hydrogen pellet in the TJ-II stellarator, which is observed to be followed by a damped oscillation in the electrostatic potential. The waveform of the relaxation is consistent with theoretical calculations of zonal potential relaxation in a non-axisymmetric magnetic geometry. The turbulent transport properties of a magnetic confinement configuration are expected to depend on the features of the collisionless damping of zonal flows, of which the present letter is the first direct observation. |
| spellingShingle | Alonso, J Sanchez, E Calvo, I Velasco, J Perfilov, S Chmyga, A Eliseev, L Krupnik, L Estrada, T Kleiber, R McCarthy, K Melnikov, A Monreal, P Parra Diaz, F Zhezhera, A TJ-II Team Observation of oscillatory radial electric field relaxation in a helical plasma |
| title | Observation of oscillatory radial electric field relaxation in a helical
plasma |
| title_full | Observation of oscillatory radial electric field relaxation in a helical
plasma |
| title_fullStr | Observation of oscillatory radial electric field relaxation in a helical
plasma |
| title_full_unstemmed | Observation of oscillatory radial electric field relaxation in a helical
plasma |
| title_short | Observation of oscillatory radial electric field relaxation in a helical
plasma |
| title_sort | observation of oscillatory radial electric field relaxation in a helical plasma |
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