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

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

First principle integrated modeling of multi-channel transport including Tungsten in JET 150 150 Mathew

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 accumulation is obtained. The poloidal asymmetries of the W density modfying its neoclassical and turbulent transport are accounted for. Actuators of the W 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, main ion dilution and collisionality.

Collection:
Journals
Journal:
Nuclear Fusion
Publisher:
IOP