X-transport of ions in diverted tokamaks, with application to DIII-D

A calculation model for X-transport due to the radially outward grad-B and curvature drift of ions trapped poloidally in the null-B-theta X-region just inside the X-point in diverted tokamaks is presented. Calculations are presented for two representative DIII-D [J. Luxon, Nucl. Fusion 42, 614 (2002)] shots which indicate that X-transport effects are significant and should be taken into account in calculations of present and future experiments. (C) 2011 American Institute of Physics. [doi:10.1063/1.3671910]