Plasma rotation and momentum transport studies at JET (Articolo in rivista)

Type
Label
  • Plasma rotation and momentum transport studies at JET (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0741-3335/48/12/001 (literal)
Alternative label
  • de Vries P. C., Rantamäki K. M., Giroud C., Asp E., Corrigan G., Eriksson A., de Greef M., Jenkins I., Knoops H. C. M., Mantica P., Nordman H., Strand P., Tala T., Weiland J., Zastrow K-D. and JET EFDA Contributors (2006)
    Plasma rotation and momentum transport studies at JET
    in Plasma physics and controlled fusion (Print); IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • de Vries P. C., Rantamäki K. M., Giroud C., Asp E., Corrigan G., Eriksson A., de Greef M., Jenkins I., Knoops H. C. M., Mantica P., Nordman H., Strand P., Tala T., Weiland J., Zastrow K-D. and JET EFDA Contributors (literal)
Pagina inizio
  • 1693 (literal)
Pagina fine
  • 1708 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0741-3335/48/12/001/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 48 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 16 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England 2. VTT Tech Res Ctr Finland, EURATOM Tekes, Espoo, Finland 3. Assoc Euratom Confederat Suisse, EPFL, CRPP, CH-1015 Lausanne, Switzerland 4. Chalmers, EURATOM VR Assoc, S-41296 Gothenburg, Sweden 5. Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands 6. CNR, ENEA, EURATOM Assoc, Ist Fis Plasma, I-20133 Milan, Italy (literal)
Titolo
  • Plasma rotation and momentum transport studies at JET (literal)
Abstract
  • An experimental study in plasma rotation and momentum transport was carried out at JET. The toroidal rotation profile was found to scale approximately with that of the ion temperature. However, significant deviations from this were found in high density ELMy H-mode discharges, which had broader rotation profiles. A rotation database analysis showed the variation of the dimensionless Mach number with respect to the plasma scenario. For predominantly NBI heated discharges the Mach number was found to be in the range of 0.3–0.45. Larger Mach numbers were observed in type I ELMy H-modes, while scenarios exhibiting type III ELMs or L-mode had lower Mach numbers. Advanced scenarios often showed a significant increase in the central Mach number when an internal transport barrier formed. A detailed study was done to investigate the Prandtl number, P_r , defined as the ratio between momentum and ion heat diffusivity. Generally the Prandtl number was found to be significantly below unity, e.g. 0.18 < P_r < 0.35. Although it is often predicted that momentum and heat diffusivity are equal in ITG dominated plasma, also for high density ELMy H-mode discharges with temperature profiles close and above the ITG threshold, the Prandtl number was P_r =0.3. (literal)
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