Study of the scaling of magnetic fluctuations in the RFX reversed field pinch (Articolo in rivista)

Type
Label
  • Study of the scaling of magnetic fluctuations in the RFX reversed field pinch (Articolo in rivista) (literal)
Anno
  • 2000-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0741-3335/42/7/307 (literal)
Alternative label
  • D. Terranova; T. Bolzonella; S. Cappello; P. Innocente; L. Marrelli; R. Pasqualotto (2000)
    Study of the scaling of magnetic fluctuations in the RFX reversed field pinch
    in Plasma physics and controlled fusion (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D. Terranova; T. Bolzonella; S. Cappello; P. Innocente; L. Marrelli; R. Pasqualotto (literal)
Pagina inizio
  • 834 (literal)
Pagina fine
  • 854 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/0741-3335/42/7/307/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 42 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 11 (literal)
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
  • Consorzio RFX, Corso Stati Uniti, 4, 35127 Padova, Italy (literal)
Titolo
  • Study of the scaling of magnetic fluctuations in the RFX reversed field pinch (literal)
Abstract
  • The scaling of magnetic fluctuations with the Lundquist number (S) is studied in the RFX reversed field pinch (RFP) device for different operational regimes. For the first time in a RFP experiment a complete set of diagnostics to measure all the quantities needed to estimate S is available. Due to the high plasma currents (up to 1.1 MA) obtained in RFX, a broad range of S values is available for scaling. The results are compared with numerical MHD simulations (SPECYL code) providing a reasonable agreement (?_exp = -0.18±0.02, ?_SPECYL = -0.22). The modification to the expected scaling law due to viscous effects is also discussed. We also perform a comparison of the amplitude of magnetic fluctuations in discharges with different characteristics: standard, pulsed poloidal current drive (PPCD), quasi single helicity and rotating locked mode induced by an external rotating toroidal field modulation. A reduced level of fluctuations is obtained during PPCD operations, although the dependence on S is the same. Concerning confinement time, at fixed I/N?3×10^14 Am, a favourable scaling with S is found. Its interpretation in terms of the simple Rechester-Rosenbluth model is briefly discussed. (literal)
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