Global migration of 13C impurities in high-density L-mode plasmas in ASDEX Upgrade

[摘要] We have studied the migration of C-13 in ASDEX Upgrade after a global impurity injection experiment in 2011. The main chamber was observed to be the largest deposition region for carbon: almost 35% of the injected atoms end up there. Moreover, gaps between wall tiles account for surface densities which are comparable to those on the plasma-facing surfaces. SOLPS modeling of the experiment produced a set of background plasmas and poloidal flow profiles for simulating the transport of C-13 with ASCOT; a match with measured deposition, however, required using an imposed flow profile. ASCOT reproduced the observed localized deposition at the outer midplane but work is needed to explain the measured deposition at the inner side of the torus and at the top of the vessel. (C) 2013 Elsevier B. V. All rights reserved.

[发布日期] 2013-07-01

[效力级别]  Proceedings Paper