Nonlinear 2-D effects in the control of magnetic Islands by ECCD (Contributo in atti di convegno)

Type
Label
  • Nonlinear 2-D effects in the control of magnetic Islands by ECCD (Contributo in atti di convegno) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.4864601 (literal)
Alternative label
  • Enzo Lazzaro (1); Dario Borgogno (2); Luca Comisso (3); Daniela Grasso (3) (2014)
    Nonlinear 2-D effects in the control of magnetic Islands by ECCD
    in RADIOFREQUENCY POWER IN PLASMAS: Proceedings of the 20th Topical Conference, Sorrento, Italy, 25-28 June 2013
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Enzo Lazzaro (1); Dario Borgogno (2); Luca Comisso (3); Daniela Grasso (3) (literal)
Pagina inizio
  • 514 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4864601 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • RADIOFREQUENCY POWER IN PLASMAS: Proceedings of the 20th Topical Conference (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 1580 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 Istituto di Fisica del Plasma P.Caldirola, Associazione Euratom-ENEA-CNR, Milano, Italy - 2 Dipartimento di Fisica, Università di Pisa, Pisa, Italy and Dipartimento di Energia, Politecnico di Torino, Torino, Italy - 3 Dipartimento di Energia, Politecnico di Torino, Torino, Italy and Istituto dei Sistemi Complessi - CNR, Roma, Italy (literal)
Titolo
  • Nonlinear 2-D effects in the control of magnetic Islands by ECCD (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-0-7354-1210-1 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Angelo A. Tuccillo and Silvio Ceccuzzi (literal)
Abstract
  • The stabilization of tearing magnetic islands by means of localized current driven by electron cyclotron waves, requires optimizing the efficiency of the injected helical current. The problem is conventionally addressed using 0-D model of the (generalized) Rutherford equation to find the dependence in terms of the island width, wave beam width and deposition scale length, as well as phase tracking requirements. The use of a 2-D reconnection model shows that both the early time response of a tearing unstable system to ECCD and important nonlinear processes lead to irreversible modifications on the 2-D configuration, where \"phase\" and \"width\" of an island cease to be observable and controllable state variables. In particular the occurrence of a phase instability and of multiple axis and current sheets, may be a serious impediment for feedback control schemes. © 2014 AIP Publishing LLC (literal)
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