First principle integrated modeling of multi-channel transport including Tungsten in JET

TitleFirst principle integrated modeling of multi-channel transport including Tungsten in JET
Publication TypeJournal Article
Year of Publication2018
AuthorsS. Breton, F. Casson, C. Bourdelle, J. Citrin, Y. Baranov, Y. Camenen, C. Challis, G. Corrigan, J. Garcia, L. Garzotti, S. Henderson, F. Koechl, E. Militello-Asp, M. O'Mulane, T. Putterich, M. Sertoli, M. Valisa
JournalNuclear Fusion

For the first time, over five confinement times, the self-consistent flux driven time evolution of heat, momentum transport and particle fluxes of electrons and multiple ions including Tungsten (W) is modeled within the integrated modeling platform JETTO [Romanelli M et al PFR 2014], using first principle-based codes: namely, QuaLiKiz [Bourdelle C. et al. PPCF 2016] for turbulent transport and NEO [Belli E A and Candy J PPCF 2008] for neoclassical transport. For a JET-ILW pulse, the evolution of measured temperatures, rotation and density profiles are successfully predicted and the observed W central core accumulation is obtained. The poloidal asymmetries of the W density modfying its neoclassical and turbulent transport are accounted for. Actuators of the W core accumulation are studied: removing the central particle source annihilates the central W accumulation whereas the suppression of the torque reduces significantly the W central accumulation. Finally, the presence of W slightly reduces main ion heat turbulent transport through complex nonlinear interplays involving radiation, effective charge impact on ITG and collisionality.





Alternate TitleNucl. Fusion

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