@article{6041, author = {G. Mank and A. M. Messiaen and J. Ongena and B. Unterberg and P. Dumortier and K.H. Finken and R. Jaspers and H. R. Koslowski and A. Kramer-Flecken and J. Rapp and U. Samm and G. van Wassenhove and R. R. Weynants and TEXTOR team}, title = {Quasistationary high confinement discharges with trans-greenwald density on TEXTOR-94}, abstract = {Confinement quality as good as ELM-free H-mode at densities substantially above die Greenwald density limit((n) over bar(e,0)/n(GW) = 1.4) has been obtained in discharges with a radiative boundary under quasistationary conditions for 20 times the energy confinement time. This is achieved by optimizing the gas-fueling rate of RI-mode discharges which tailors their favorable energy confinement and lends to discharges with beta values just below the operational limit beta(n) = 2 of TEXTOR-94, thereby effectively avoiding confinement back transitions or disruptions. In addition, this high-density regime is favorable for helium removal and results in figures of merit tau(p,He)(*)/tau(E) approximate to 10-15, relevant for a future fusion power reactor.}, year = {2000}, journal = {Physical Review Letters}, volume = {85}, number = {11}, pages = {2312-2315}, month = {Sep 11}, isbn = {0031-9007}, doi = {10.1103/PhysRevLett.85.2312}, language = {eng}, }