Search for zonal flows in the edge turbulence of Alcator C-Mod (Articolo in rivista)

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Label
  • Search for zonal flows in the edge turbulence of Alcator C-Mod (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0741-3335/54/2/025008 (literal)
Alternative label
  • S. J. Zweben; J. L. Terry; M. Agostini; R. Hager; J. W. Hughes; J. R. Myra; D. C. Pace; the Alcator C-Mod Group (2012)
    Search for zonal flows in the edge turbulence of Alcator C-Mod
    in Plasma physics and controlled fusion (Print); IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. J. Zweben; J. L. Terry; M. Agostini; R. Hager; J. W. Hughes; J. R. Myra; D. C. Pace; the Alcator C-Mod Group (literal)
Pagina inizio
  • 025008 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Article Number: 025008 La rivista è pubblicata anche online con ISSN 1361-6587. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0741-3335/54/2/025008/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 54 (literal)
Rivista
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  • 21 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Princeton Plasma Physics Laboratory, Princeton NJ 08540, USA; 2 Massachusetts Institute of Technology, Cambridge MA 02139, USA; 3 Consorzio RFX, Associazione EURATOM, I-35127, Padova, Italy; 4 Max Planck Institute for Plasma Physics, D-85748 Garching, Germany; 5 Lodestar Research Corporation, 2400 Central Ave., Boulder CO 80301, USA; 6 ORISE, Oak Ridge, TN 37831, USA. (S J Zweben 1, J L Terry 2, M Agostini 3, R Hager 4, J W Hughes 2, J R Myra 5, D C Pace 6 and the Alcator C-Mod Group) (literal)
Titolo
  • Search for zonal flows in the edge turbulence of Alcator C-Mod (literal)
Abstract
  • The time-dependent radial and poloidal velocity of edge turbulence is evaluated using a 2D time-delayed cross-correlation analysis of fast camera data from the gas puff imaging (GPI) diagnostic viewing the outer midplane region in Alcator C-Mod. The local poloidal velocity fluctuations are averaged over the poloidal viewing region of the GPI diagnostic and radially resolved over ±2cm around the separatrix. The resulting poloidal velocity usually has a broadband frequency spectrum in the range 120kHz, and a radial correlation width which decreases with increasing line-averaged density. In some cases with ICRH heating there was also a coherent poloidal velocity oscillation at 67kHz which was highly correlated with a poloidal magnetic field oscillation at the same frequency. Some of these results are similar to the geodesic acoustic modes and/or zonal flows described in previous experiments and theory. (literal)
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