Journal article
Observation of oscillatory radial electric field relaxation in a helical plasma
- Abstract:
- 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Accepted manuscript, pdf, 769.7KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevLett.118.185002
Authors
+ Ministerio de Economía, Industria y Competitividad, Spain
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- Grant:
- ENE2012-30832
- ENE2013-48679
+ European Commission
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- Grant:
- EUROfusion Consortium
- trainingprogramme2014-2018under grantagreementNo633053
- hasreceivedfundingfromtheEuratom research
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 118
- Issue:
- 18
- Article number:
- 185002
- Publication date:
- 2017-05-05
- Acceptance date:
- 2017-02-01
- DOI:
- EISSN:
-
1079-7114
- ISSN:
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0031-9007
- Keywords:
- Pubs id:
-
pubs:642015
- UUID:
-
uuid:6ca059d8-a858-4a0e-a2c6-21a5333fa080
- Local pid:
-
pubs:642015
- Source identifiers:
-
642015
- Deposit date:
-
2017-02-02
- ARK identifier:
Terms of use
- Copyright holder:
- Alonso et al
- Copyright date:
- 2017
- Notes:
- Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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