Journal
PLASMA PHYSICS AND CONTROLLED FUSION
Volume 58, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0741-3335/58/12/125009
Keywords
impurity; Pfirsch-Schlut; sawtooth; nonlinear MHD simulations
Categories
Funding
- project Equip@Meso [ANR-10-EQPX-29-01]
- GENCI project [056348]
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The effect of sawteeth on impurity dynamics is studied with the XTOR-2F code. Non-linear full 3D MHD simulations including appropriate fluid equations for impurities in the high collisional regime show that the presence of regular sawtooth crashes affects the impurity behaviour. A spatial non-uniformity of 5% in post-crash impurity density profiles persists due to 2D structures of impurity density which appear during sawtooth crashes. They are shown to be mainly driven by the E x B velocity, and are responsible for the sudden impurity transport in the core plasmas.
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