High confinement and high density with stationary plasma energy and strong edge radiation cooling in the upgraded Torus experiment for technology oriented research (TEXTOR-94)

TitleHigh confinement and high density with stationary plasma energy and strong edge radiation cooling in the upgraded Torus experiment for technology oriented research (TEXTOR-94)
Publication TypeJournal Article
Year of Publication1997
AuthorsA.M Messiaen, J. Ongena, B. Unterberg, J. Boedo, G. Fuchs, R. Jaspers, L. Konen, H.R Koslowski, G. Mank, J. Rapp, U. Samm, P.E Vandenplas, G. Van Oost, G. van Wassenhove, G. Waidmann, R.R Weynants, G.H Wolf, G. Bertschinger, G. Bonheure, M. Brix, P. Dumortier, F. Durodie, K.H. Finken, B. Giesen, D. Hillis, P. Hutteman, R. Koch, A. KramerFlecken, A. Lyssoivan, P. Mertens, A. Pospieszczyk, A. PostZwicker, M. Sauer, B. Schweer, J. Schwelberger, G. Telesca, M.Z Tokar, R. Uhlemann, M. Vervier, J. Winter
JournalPhysics of Plasmas
Volume4
Number5
Pagination1690-1698
Date PublishedMay
ISBN Number1070-664X
Abstract

An overview of the results obtained so far for the radiative I-mode regime on the upgraded Torus Experiment for Technology Oriented Research (TEXTOR-94) [Proceedings of die 16th IEEE Symposium on Fusion Engineering (Institute of Electrical and Electronics Engineers, Piscataway, NJ, 1995), Vol. 1, p. 470] is given. This regime is obtained under quasistationary conditions with edge neon seeding in a pumped limiter tokamak with circular cross section. It combines high confinement and high beta (up to a normalized beta, beta(n) = 2) with low edge q values (down to q(a) = 2.8) and high density even above the Greenwald limit together with dominant edge radiative heat exhaust, and therefore shows promise for the future of fusion research. Bulk and edge properties of these discharges an described, and a detailed account is given of the energy and particle confinement and their scaling. Energy confinement scales linearly with density as for the nonsaturated Ohmic Neo-Alcator scaling, but the usual degradation with total power remains. No deleterious effects of the neon seeding on fusion reactivity and plasma stability have been observed. (C) 1997 American Institute of Physics.

DOI10.1063/1.872343
PID

037ff68bcb3900c7ddfb694848a692ba

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