Dimensionless scalings of confinement, heat transport and pedestal stability in JET-ILW and comparison with JET-C

0474193 - ÚFP 2018 RIV GB eng J - Journal Article
Frassinetti, L. - Saarelma, S. - Lomas, P. - Nunes, I. - Rimini, F. - Beurskens, M.N.A. - Bílková, Petra - Boom, J.E. - De La Luna, E. - Delabie, E. - Drewelow, P. - Flanagan, J. - Garzotti, L. - Giroud, C. - Hawks, N. - Joffrin, E. - Kempenaars, M. - Kim, H.-T. - Kruezi, U. - Loarte, A. - Lomanowski, B. - Lupelli, I. - Meneses, L. - Maggi, C.F. - Menmuir, S. - Peterka, Matěj - Rachlew, E. - Romanelli, M. - Stefanikova, E.
Dimensionless scalings of confinement, heat transport and pedestal stability in JET-ILW and comparison with JET-C.
Plasma Physics and Controlled Fusion. Roč. 59, č. 1 (2017), č. článku 014014. ISSN 0741-3335. E-ISSN 1361-6587.
[EPS 2016: Conference on Plasma Physics/43./. Leuven, 04.07.2016-08.07.2016]
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : JET-ILW * dimensionless scaling * pedestal * confinement * pedestal stability * heat transport
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 3.032, year: 2017
http://dx.doi.org/10.1088/0741-3335/59/1/014014

Three dimensionless scans in the normalized Larmor radius .rho.*, normalized collisionality ν* and normalized plasma pressure .beta. have been performed in JET with the ITER-like wall (JET-ILW).The normalized energy confinement and the thermal diffusivity exhibit a scaling with .rho.* consistent with the earlier results obtained in the carbon wall JET (JET-C) and with a gyro-Bohm scaling. In the pedestal, experimental results show that the stability is not dependent on .rho.*, qualitatively in agreement with the peeling–ballooning (P–B) model.The ν* dimensionless scaling shows that JET-ILW normalized confinement has a stronger dependence on collisionality than JET-C.The .beta. dimensionless scan shows that, at low collisionality, JET-ILW normalized confinement has no clear dependence with .beta., in agreement with part of the earlier scalings. At high collisionality, a reduction of the normalized confinement with increasing .beta. is observed
Permanent Link: http://hdl.handle.net/11104/0271302