First-principle theory-based scaling of the SOL width in limited tokamak plasmas, experimental validation, and implications for the ITER start-up(25thIAEA2014)

0436978 - ÚFP 2015 RIV AT eng O - Others
Ricci, P. - Halpern, F.D. - Loizu, J. - Jolliet, S. - Mosetto, A. - Riva, F. - Wersal, C. - Fasoli, A. - Furno, I. - Labit, B. - Nespoli, F. - Theiler, C. - Arnoux, G. - Gunn, J. P. - Horáček, Jan - Kocan, M. - LaBombard, B. - Silva, C.
First-principle theory-based scaling of the SOL width in limited tokamak plasmas, experimental validation, and implications for the ITER start-up(25thIAEA2014).
2014
R&D Projects: GA ČR(CZ) GAP205/12/2327; GA MŠMT(CZ) LM2011021
Institutional support: RVO:61389021
Keywords : plasma * tokamak
Subject RIV: BL - Plasma and Gas Discharge Physics
http://infoscience.epfl.ch/record/203423/files/ricci.pdf

Předneseno na:25th IAEA Fusion Energy Conference,2014 The steady-state heat load onto the plasma facing components of tokamak devices depends on the SOL width, which results from a balance between plasma outflowing from the core region, turbulent transport, and losses to the divertor or limiter. Here we present a first-principle based scaling for the characteristic SOL pressure scale length. It is found that the SOL width increases with the tokamak major radius, the safety factor, and the density, while it decreases with the toroidal magnetic field and the plasma temperature. The scaling is benchmarked against the flux-driven non-linear turbulence simulations that have been carried out with the GBS code. The theoretical scaling reveals good agreement with experimental data obtained in a number of tokamaks, including TCV, Alcator C- MOD, COMPASS, JET, and Tore Supra.
Permanent Link: http://hdl.handle.net/11104/0240602