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 - Ostatní výsledky
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
Grant CEP: GA ČR(CZ) GAP205/12/2327; GA MŠMT(CZ) LM2011021
Institucionální podpora: RVO:61389021
Klíčová slova: plasma * tokamak
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
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.
Trvalý link: http://hdl.handle.net/11104/0240602