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          Institute: MPI für Plasmaphysik     Collection: Articles, Books, Inbooks     Display Documents



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ID: 56137.0, MPI für Plasmaphysik / Articles, Books, Inbooks
Progress towards steady-state operation and real-time control of internal transport barriers in JET
Authors:Litaudon, X.; Becoulet, A.; Crisanti, F.; Wolf, R. C.; Baranov, Yu. F.; Barbato, E.; Becoulet, M.; Budny, R.; Castaldo, C.; Cesario, R.; Challis, C. D.; Conway, G. D.; De Baar, M. R.; De Vries, P.; Dux, R.; Eriksson, L. G.; Esposito, B.; Felton, R.; Fourment, C.; Frigione, D.; Garbet, X.; Giannella, R.; Giroud, C.; Gorini, G.; Hawkes, N. C.; Hellsten, T.; Hender, T. C.; Hennequin, P.; Hogeweij, G. M. D.; Huysmans, G. T. A.; Imbeaux, F.; Joffrin, E.; Lomas, P. J.; Lotte, P.; Maget, P.; Mailloux, J.; Mantica, P.; Mantsinen, M. J.; Mazon, D.; Moreau, D.; Parail, V.; Pericoli, V.; Rachlew, E.; Riva, M.; Rimini, F.; Sarazin, Y.; Stratton, B. C.; Tala, T. J. J.; Tresset, G.; Tudisco, O.; Zabeo, L.; Zastrow, K.-D.; JET-EFDA Contributors
Language:English
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Nuclear Fusion
Journal Abbrev.:Nucl. Fusion
Volume:43
Issue / Number:7
Start Page:565
End Page:572
Copyright:Copyright © Institute of Physics and IOP Publishing Limited 2003
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:In JET, advanced tokamak research mainly focuses on plasmas with internal transport barriers (ITBs) that are strongly influenced by the current density profile. A previously developed optimized shear regime with low magnetic shear in the plasma centre has been extended to deeply negative magnetic shear configurations. High fusion performance with wide ITBs has been obtained transiently with negative central magnetic shear configuration: HIPB98(y,2) ~ 1.9, βN = 2.4 at Ip = 2.5 MA. At somewhat reduced performance, electron and ion ITBs have been sustained in full current drive operation with 1 MA of bootstrap current: HIPB98(y,2) ~ 1, βN = 1.7 at Ip = 2.0 MA. The ITBs were maintained for up to 11 s for the latter case. This duration, much larger than the energy confinement time (37 times larger), is already approaching a current resistive time. New real-time measurements and feedback control algorithms have been developed and implemented in JET for successfully controlling the ITB dynamics and the current density profile in the highly non-inductive current regime.
Free Keywords:JOINT EUROPEAN TORUS, HYBRID CURRENT DRIVE, MAGNETIC SHEAR, HIGH-PERFORMANCE, PROFILE CONTROL, DT PLASMAS, SCENARIOS, STABILITY, SUPRA, MODE
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Plasmaphysik/E2
External Affiliations:Association EURATOM-CEA, CEA Cadarache, F-13108 St Paul lez Durance, France; Associazione EURATOM-ENEA sulla Fusione, Centre Ricerche Frascati, Italy; Institut für Plasmaphysik, Association EURATOM-FZJ, D-52425 Jülich, Germany; UKAEA-EURATOM Association, Culham Science Centre, Abingdon, OX14 3DB, UK; Princeton Plasma Physics Laboratory, PO Box 451, Princeton, NJ 08543, USA; Ass. EURATOM-FOM, TEC, Cluster, 3430 BE Nieuwegein, The Netherlands; Instituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, Milan, Italy; Physics Deptartment, KTH, Association EURATOM/VR, S-10044 Stockholm, Sweden; Association EURATOM-TEKES, VTT Chemical Technology, FIN-02044, Finland
Identifiers:DOI:10.1088/0029-5515/43/7/309
URL:http://stacks.iop.org/0029-5515/43/565
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