@article{5981, author = {J. Ongena and A. M. Messiaen and B. Unterberg and R. V. Budny and C. E. Bush and K. Hill and G. T. Hoang and G. Jackson and A. Kallenbach and P. Monier-Garbet and D. Mueller and M. Murakami and G. Staebler and F. Ryter and M. Wade and M. Bell and J. Boedo and G. Bonheure and P. Dumortier and F. Durodie and K.H. Finken and G. Fuchs and B. Giesen and P. Hutteman and R. Jaspers and R. Koch and A. Kramer-Flecken and P. Mertens and R. Moyer and A. Pospieszczyk and A. Ramsey and U. Samm and M. Sauer and B. Schweer and R. Uhlemann and P. E. Vandenplas and G. Van Oost and M. Vervier and G. van Wassenhove and G. Waidmann and R. R. Weynants and G. H. Wolf and ASDEX Upgrade Team and DIII-D Team and TEXTOR team and Tftr Team and Team Tore Supra}, title = {Overview of experiments with radiation cooling at high confinement and high density in limited and diverted discharges}, abstract = {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.}, year = {1999}, journal = {Plasma Physics and Controlled Fusion}, volume = {41}, pages = {A379-A399}, month = {Mar}, isbn = {0741-3335}, doi = {10.1088/0741-3335/41/3a/031}, language = {eng}, }