MPI für Plasmaphysik / Articles, Books, Inbooks |
|Edge localized mode physics and operational aspects in tokamaks|
|Authors:||Bécoulet, M.; Huysmans, G.; Sarazin, Y.; Garbet, X.; Ghendrih, Ph.; Rimini, F.; Joffrin, E.; Litaudon, X.; Monier-Garbet, P.; Ané, J.-M.; Thomas, P.; Grosman, A.; Parail, V.; Wilson, H.; Lomas, P.; de Vries, P.; Zastrow, K.-D.; Matthews, G. F.; Lonnroth, J.; Gerasimov, S.; Sharapov, S.; Gryaznevich, M.; Counsell, G.; Kirk, A.; Valovic, M.; Buttery, R.; Loarte, A.; Saibene, G.; Sartori, R.; Leonard, A.; Snyder, P.; Lao, L. L.; Gohil, P.; Evans, T. E.; Moyer, R. A.; Kamada, Y.; Chankin, A.; Oyama, N.; Hatae, T.; Asakura, N.; Tudisco, O.; Giovannozzi, E.; Crisanti, F.; Perez, C. P.; Koslowski, H. R.; Eich, T.; Sips, A.; Horton, L.; Hermann, A.; Lang, P.; Stober, J.; Suttrop, W.; Beyer, P.; Saarelma, S.; Contributors to JET-EFDA Workprogramme|
|Research Context:||30th European Physical Society Conference on Controlled Fusion and Plasma Physics, St. Petersburg, 2003-07-07 to 2003-07-11|
|Date of Publication (YYYY-MM-DD):||2003|
|Title of Journal:||Plasma Physics and Controlled Fusion|
|Journal Abbrev.:||Plasma Phys. Control. Fusion|
|Issue / Number:||12A|
|Title of Issue:||Invited Papers from the 30th European Physical Society Conference on Controlled Fusion and Plasma Physics|
|Copyright:||Copyright © Institute of Physics and IOP Publishing Limited 2003|
|Abstract / Description:||Recent progress in experimental and theoretical studies of edge localized mode (ELM) physics is reviewed for the reactor relevant plasma regimes, namely the high confinement regimes, that is, H-modes and advanced scenarios.
Theoretical approaches to ELM physics, from a linear ideal magnetohydrodynamic (MHD) stability analysis to non-linear transport models with ELMs are discussed with respect to experimental observations, in particular the fast collapse of pedestal pressure profiles, magnetic measurements and scrape-off layer transport during ELMs.
High confinement regimes with different types of ELMs are addressed in this paper in the context of development of operational scenarios for ITER. The key parameters that have been identified at present to reduce the energy losses in Type I ELMs are operation at high density, high edge magnetic shear and high triangularity. However, according to the present experimental scaling for the energy losses in Type I ELMs, the extrapolation of such regimes for ITER leads to unacceptably large heat loads on the divertor target plates exceeding the material limits. High confinement H-mode scenarios at high triangularity and high density with small ELMs (Type II), mixed regimes (Type II and Type I) and combined advanced regimes at high βp are discussed for present-day tokamaks. The optimum combination of high confinement and small MHD activity at the edge in Type II ELM scenarios is of interest to ITER. However, to date, these regimes have been achieved in a rather narrow operational window and far from ITER parameters in terms of collisionality, edge safety factor and βp.
|External Publication Status:||published|
|Communicated by:||N. N.|
|Affiliations:||MPI für Plasmaphysik/E1|
|External Affiliations:||Association Euratom-CEA, CEA Cadarache, F-13108 St Paul-lez-Durance, France; Euratom/UKAEA Association, Fusion Culham Science Centre, Abingdon, OX14 3EA, UK; EFDA Close Support Unit, 2 Boltzmannstrasse, Garching, DE; General Atomics, 3550 General Atomics Court, PO Box 85608, San Diego, CA, USA; University of California, San Diego, La Jolla, CA 92093, USA; Japan Atomic Energy Research Institute (JAERI), Japan; Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Frascati, Italy; Institut für Plasmaphysik, Forschungszentrum Julich, Germany; UMR 6633PIIM CNRS-Université de Provence, F-13397 Marseille Cedex 20, France; Helsinki University of Technology, Euratom-TEKES Association, FIN-02015 HUT, Finland|
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