Observations of rotation in JET plasmas with electron heating by ion cyclotron resonance heating (Articolo in rivista)

Type
Label
  • Observations of rotation in JET plasmas with electron heating by ion cyclotron resonance heating (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0741-3335/54/7/074007 (literal)
Alternative label
  • Hellsten, T [ 1 ] ; Johnson, TJ [ 1 ] ; Van Eester, D [ 2,12 ] ; Lerche, E [ 2,12 ] ; Lin, Y [ 4 ] ; Mayoral, ML [ 3 ] ; Ongena, J [ 2,12 ] ; Calabro, G [ 9 ] ; Crombe, K [ 2,12 ] ; Frigione, D [ 9 ] ; Giroud, C [ 3 ] ; Lennholm, M [ 3 ] ; Mantica, P [ 5 ] ; Nave, MFF [ 6 ] ; Naulin, V [ 8 ] ; Sozzi, C [ 9 ] ; Studholme, W [ 3 ] ; Tala, T [ 7 ] ; Versloot, T [ 10 ]; and JET-EFDA contributors (2012)
    Observations of rotation in JET plasmas with electron heating by ion cyclotron resonance heating
    in Plasma physics and controlled fusion (Online); IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Hellsten, T [ 1 ] ; Johnson, TJ [ 1 ] ; Van Eester, D [ 2,12 ] ; Lerche, E [ 2,12 ] ; Lin, Y [ 4 ] ; Mayoral, ML [ 3 ] ; Ongena, J [ 2,12 ] ; Calabro, G [ 9 ] ; Crombe, K [ 2,12 ] ; Frigione, D [ 9 ] ; Giroud, C [ 3 ] ; Lennholm, M [ 3 ] ; Mantica, P [ 5 ] ; Nave, MFF [ 6 ] ; Naulin, V [ 8 ] ; Sozzi, C [ 9 ] ; Studholme, W [ 3 ] ; Tala, T [ 7 ] ; Versloot, T [ 10 ]; and JET-EFDA contributors (literal)
Pagina inizio
  • 074007 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0741-3335/54/7/074007/pdf/0741-3335_54_7_074007.pdf (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 54 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] KTH, Euratom VR Assoc, EES, Stockholm, Sweden [ 2 ] Assoc Euratom Belgian State, LPP ERM KMS, B-1000 Brussels, Belgium [ 3 ] Euratom CCFE Fus Assoc, Culham Sci Ctr, Abingdon, Oxon, England [ 4 ] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA [ 5 ] EURATOM ENEA CNR Assoc, Istituto di Fisica del Plasma, Milan, Italy [ 6 ] Univ Tech Lisboa, Euratom IST Fus Assoc, Inst Plasmas & Fusao Nucl, Inst Super Tecn, Lisbon, Portugal [ 7 ] Assoc Euratom Tekes, HUT, Helsinki, Finland [ 8 ] Assoc Euratom Riso, Natl Lab, Roskilde, Denmark [ 9 ] EURATOM ENEA Fus, CR Frascati, Frascati, Italy [ 10 ] EURATOM, FOM Inst Plasma Phys, Nieuwegein, Netherlands [ 11 ] JET EFDA, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England [ 12 ] TEC Partner, Ridgeland, MS USA (literal)
Titolo
  • Observations of rotation in JET plasmas with electron heating by ion cyclotron resonance heating (literal)
Abstract
  • The rotation of L-mode plasmas in the JET tokamak heated by waves in the ion cyclotron range of frequencies (ICRF) damped on electrons, is reported. The plasma in the core is found to rotate in the counter-current direction with a high shear and in the outer part of the plasma with an almost constant angular rotation. The core rotation is stronger in magnitude than observed for scenarios with dominating ion cyclotron absorption. Two scenarios are considered: the inverted mode conversion scenarios and heating at the second harmonic He-3 cyclotron resonance in H plasmas. In the latter case, electron absorption of the fast magnetosonic wave by transit time magnetic pumping and electron Landau damping (TTMP/ELD) is the dominating absorption mechanism. Inverted mode conversion is done in (He-3)-H plasmas where the mode converted waves are essentially absorbed by electron Landau damping. Similar rotation profiles are seen when heating at the second harmonic cyclotron frequency of He-3 and with mode conversion at high concentrations of He-3. The magnitude of the counter-rotation is found to decrease with an increasing plasma current. The correlation of the rotation with the electron temperature is better than with coupled power, indicating that for these types of discharges the dominating mechanism for the rotation is related to indirect effects of electron heat transport, rather than to direct effects of ICRF heating. There is no conclusive evidence that mode conversion in itself affects rotation for these discharges. (literal)
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