Pochelon, AntoinePietrzyk, AdamGoodman, TimothyHenderson, MarkReimerdes, HolgerTran, Minh QuangBehn, RolandCoda, StefanoDutch, MichaelDuval, Basil P.Furno, IvoHofmann, FerdinandHogge, Jean-PhilippeLister, Jonathan BryanLlobet, XavierMartin, YvesMoret, Jean-MarcNieswand, ChristophRommers, Jeroen HubertSauter, Oliviervan Toledo, WieboTonetti, GilbertWeisen, HenriEsipchuk, Y.V.Martynov, Andrei A.2019-05-222019-05-222019-05-221998https://infoscience.epfl.ch/handle/20.500.14299/156513Within the range of plasma shapes and plasma currents investigated, the electron confinement time, Tau_E increases with density, elongation and negative triangularity (-0.4<delta<+0.4), similar to Ohmic heating (in these low density discharges). In addition, TauEe increases with q_a up to q_a~5 after which it decreases. There is little dependence of TauEe on the heating location provided it is inside the q= I surface. As the heating location is moved outside the q=l surface, TauEe decreases. This may be the explanation of the observed decrease in TauEe at high q_a. The power-induced degradation exponent found is generally as expected: alpaha_P = -0.5.Central ECRH heatingeffect of deposition locationConfinement dependencies on densityon safety factoron densityand on triangularitytext::conference output::conference proceedings::conference paper