Analysis of Lithium Driven Electron Density Peaking in FTU Liquid Lithium Limiter Experiments
Plasma Physics
2013-06-20 v1
Abstract
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., Nucl. Fusion, 2011) discharge during the density ramp-up phase is studied. A non-linear gyrokinetic analysis performed with GKW (Peeters et al.,Comp. Phys. Comm., 2009) 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.
Keywords
Cite
@article{arxiv.1306.4557,
title = {Analysis of Lithium Driven Electron Density Peaking in FTU Liquid Lithium Limiter Experiments},
author = {G. Szepesi and M. Romanelli and F. Militello and A. G. Peeters and Y. Camenen and F. J. Casson and W. A. Hornsby and A. P. Snodin and D. Wagner and FTU team},
journal= {arXiv preprint arXiv:1306.4557},
year = {2013}
}
Comments
23 pages, 12 figures