dc.contributor.author | Ghim, Y.-c. | |
dc.contributor.author | Schekochihin, A. A. | |
dc.contributor.author | Field, A. R. | |
dc.contributor.author | Abel, I. G. | |
dc.contributor.author | Barnes, Michael | |
dc.contributor.author | Colyer, G. | |
dc.contributor.author | Cowley, S. C. | |
dc.contributor.author | Parra Diaz, Felix Ignacio | |
dc.contributor.author | Dunai, D. | |
dc.contributor.author | Zoletnik, S. | |
dc.contributor.author | MAST Team | |
dc.date.accessioned | 2013-11-06T16:40:35Z | |
dc.date.available | 2013-11-06T16:40:35Z | |
dc.date.issued | 2013-04 | |
dc.date.submitted | 2012-08 | |
dc.identifier.issn | 0031-9007 | |
dc.identifier.issn | 1079-7114 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/81999 | |
dc.description.abstract | Beam emission spectroscopy (BES) measurements of ion-scale density fluctuations in the MAST tokamak are used to show that the turbulence correlation time, the drift time associated with ion temperature or density gradients, the particle (ion) streaming time along the magnetic field, and the magnetic drift time are consistently comparable, suggesting a “critically balanced” turbulence determined by the local equilibrium. The resulting scalings of the poloidal and radial correlation lengths are derived and tested. The nonlinear time inferred from the density fluctuations is longer than the other times; its ratio to the correlation time scales as ν*i[superscript -0.8±0.1], where ν*i=ion collision rate/streaming rate. This is consistent with turbulent decorrelation being controlled by a zonal component, invisible to the BES, with an amplitude exceeding those of the drift waves by ∼ν*i[superscript -0.8]. | en_US |
dc.description.sponsorship | Research Councils UK (Energy Programme under Grant No. EP/I501045) | en_US |
dc.description.sponsorship | Kwanjeong Educational Foundation (Korea) | en_US |
dc.description.sponsorship | EURATOM | en_US |
dc.description.sponsorship | Culham Centre for Fusion Energy | en_US |
dc.description.sponsorship | Leverhulme Trust (International Network for Magnetised Plasma Turbulence) | en_US |
dc.description.sponsorship | European Commission | en_US |
dc.language.iso | en_US | |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1103/PhysRevLett.110.145002 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | APS | en_US |
dc.title | Experimental Signatures of Critically Balanced Turbulence in MAST | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Ghim, Y.-c., A. A. Schekochihin, A. R. Field, I. G. Abel, M. Barnes, G. Colyer, S. C. Cowley, F. I. Parra, D. Dunai, and S. Zoletnik. Experimental Signatures of Critically Balanced Turbulence in MAST. Physical Review Letters 110, no. 14 (April 2013). | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Plasma Science and Fusion Center | en_US |
dc.contributor.mitauthor | Parra Diaz, Felix Ignacio | en_US |
dc.contributor.mitauthor | Barnes, Michael | en_US |
dc.relation.journal | Physical Review Letters | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Ghim, Y.-c.; Schekochihin, A. A.; Field, A. R.; Abel, I. G.; Barnes, M.; Colyer, G.; Cowley, S. C.; Parra, F. I.; Dunai, D.; Zoletnik, S. | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-9621-7404 | |
dspace.mitauthor.error | true | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |