Analysis of Lithium Driven Electron Density Peaking in FTU Liquid Lithium Limiter Experiments

The impact of lithium impurities on the microstability and turbulent transport characteristics in the core of a typical FTU liquid lithium limiter (LLL) (Mazzitelli et al 2011 Nucl. Fusion 51 073006) discharge during the density ramp-up phase is studied. A non-linear gyrokinetic analysis performed with GKW (Peeters et al 2009 Comput. Phys. Commun. 180 2650) accompanied by a quasi-linear fluid analysis is presented. We show that a centrally peaked, high concentration lithium profile contributes to the electron peaking by reducing the outward electron flux, and that it leads to inward turbulent deuterium transport through ion flux separation.


Published in:
Nuclear Fusion, 53, 3, 033007
Year:
2013
Publisher:
Vienna, Int Atomic Energy Agency
Laboratories:
SPC
CRPP




 Record created 2013-02-28, last modified 2018-01-28

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