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  Simulation of the time behaviour of impurities in JET Ar-seeded discharges and its relation with sawtoothing and RF heating

Puiatti, M. E., Valisa, M., Mattioli, M., Bolzonella, T., Bortolon, A., Coffey, I., et al. (2003). Simulation of the time behaviour of impurities in JET Ar-seeded discharges and its relation with sawtoothing and RF heating. Plasma Physics and Controlled Fusion, 45, 2011-2024. doi:10.1088/0741-3335/45/12/003.

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Puiatti, M. E.1, Autor
Valisa, M.1, Autor
Mattioli, M.1, Autor
Bolzonella, T.1, Autor
Bortolon, A.1, Autor
Coffey, I.1, Autor
Dux, R.2, Autor           
von Hellermann, M.1, Autor
Monier-Garbet, P.1, Autor
Nave, M. F. F.1, Autor
Ongena, J.1, Autor
Contributors to the EFDA-JET Workprogramme, Autor  
Affiliations:
1Consorzio RFX, Associazione Euratom-ENEA sulla Fusione, Padova, Italy; Queens University, Belfast BT7 INN, UK; FOM Instituut voor Plasmafysica Rijnhuizen, EURATOM Association, Nieuwegein, The Netherlands; Association Euratom-CEA, DRFC, CEA Cadarache, St Paul lez Durance, France; Associacao Euratom-IST, Centro de Fusao Nuclear, Lisboa, Portugal; LPP-ERM/KMS Euratom-Belgian State Association, Brussels, Belgium, ou_persistent22              
2Experimental Plasma Physics 4 (E4), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856293              

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 Zusammenfassung: In JET, Ar seeding has proven to be a successful means to reach quasi-stationary regimes that feature, simultaneously, high density, high confinement and an edge radiation belt without significant contamination of the plasma. A detailed analysis shows that in the presence of centrally deposited ion cyclotron resonance heating (ICRH) Ar transport is modified, in the sense of a reduction of the inward pinch convection. Sawtooth (ST) crashes also hamper the Accumulation of Ar in the core, though their contribution is less relevant compared to the effect of the ICRH. The analysis is carried out by means of a one-dimensional impurity transport code, which has been applied to several Ar-seeded discharges. The result about the role of ST crashes is independent of triangularity. In the high triangularity discharges, with continuous D refuelling, the convection of impurities in the core region is typically very small so that ICRH injection itself has little relevance in the control of the Ar behaviour.

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Sprache(n): eng - English
 Datum: 2003
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: Expertenbegutachtung
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Titel: Plasma Physics and Controlled Fusion
  Alternativer Titel : Plasma Phys. Control. Fusion
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Copyright © Institute of Physics and IOP Publishing Limited 2003
Seiten: - Band / Heft: 45 Artikelnummer: - Start- / Endseite: 2011 - 2024 Identifikator: -