TY - JOUR
T1 - Overview of experiments with radiation cooling at high confinement and high density in limited and diverted discharges
JF - Plasma Physics and Controlled Fusion
Y1 - 1999
A1 - Ongena, J.
A1 - Messiaen, A. M.
A1 - Unterberg, B.
A1 - Budny, R. V.
A1 - Bush, C. E.
A1 - Hill, K.
A1 - Hoang, G. T.
A1 - Jackson, G.
A1 - Kallenbach, A.
A1 - Monier-Garbet, P.
A1 - Mueller, D.
A1 - Murakami, M.
A1 - Staebler, G.
A1 - Ryter, F.
A1 - Wade, M.
A1 - Bell, M.
A1 - Boedo, J.
A1 - Bonheure, G.
A1 - Dumortier, P.
A1 - Durodie, F.
A1 - Finken, K.H.
A1 - Fuchs, G.
A1 - Giesen, B.
A1 - Hutteman, P.
A1 - R. Jaspers
A1 - Koch, R.
A1 - Kramer-Flecken, A.
A1 - Mertens, P.
A1 - Moyer, R.
A1 - Pospieszczyk, A.
A1 - Ramsey, A.
A1 - Samm, U.
A1 - Sauer, M.
A1 - Schweer, B.
A1 - Uhlemann, R.
A1 - Vandenplas, P. E.
A1 - Van Oost, G.
A1 - Vervier, M.
A1 - van Wassenhove, G.
A1 - Waidmann, G.
A1 - Weynants, R. R.
A1 - Wolf, G. H.
A1 - ASDEX-Upgrade Team
A1 - DIII-D Team
A1 - TEXTOR team
A1 - Tftr Team
A1 - Tore Supra, Team
AB - An overview is presented of recent experiments with radiating mantles on limiter and divertor machines, realizing simultaneously high confinement and high density at high-radiation levels. A variety of operational regimes has been observed and the characteristics of each are documented. High-performance plasmas (i.e. edge localized mode (ELM)-free H-mode confinement quality f(H93) greater than or equal to 1 and normalized beta values beta(n) greater than or equal to 2 simultaneously) with radiating mantles have been demonstrated under quasistationary conditions during the maximum flattop time of the machine (equal to tens of confinement times) on DIII-D and TEXTOR-94. Maximum values for beta(n) up to 4 and for the advanced tokamak confinement-stability product beta(n) x f(L89) up to 13, have been obtained in very high confinement mode (VH-mode) like discharges with radiating mantles in DIII-D. There is a striking similarity between improved ohmic confinement discharges (with or without Ne seeding) and radiating mantle discharges, indicating a possible common origin for the confinement improvement observed. Possible scenarios for the application of radiating mantles on larger machines such as JET and JT-60U are indicated.
VL - 41
SN - 0741-3335
U5 - a4b81a1ae4f8558230486711dfd95b29
ER -