Poloidal distribution of recycling sources and core plasma fueling in DIII-D, ASDEX-Upgrade and JET L-mode plasmas

M. Groth*, G. D. Porter, T. D. Rognlien, S. Wiesen, M. Wischmeier, M. N A Beurskens, X. Bonnin, B. D. Bray, S. Brezinsek, N. H. Brooks, D. P. Coster, T. Eich, M. E. Fenstermacher, C. Fuchs, R. A. Groebner, D. Harting, A. Huber, S. Jachmich, A. Kallenbach, C. J. LasnierA. W. Leonard, A. Meigs, H. W. Müller, M. E. Rensink, D. L. Rudakov, J. G. Watkins, E. Wolfrum, DII-D Team, ASDEX Upgrade team , JET EFDA Contributors

*Corresponding author for this work

Research output: Contribution to journalArticleScientific

14 Citations (Scopus)

Abstract

Deuterium fueling profiles across the separatrix have been calculated with the edge fluid codes UEDGE, SOLPS and EDGE2D/EIRENE for lower single null, ohmic and low-confinement plasmas in DIII-D, ASDEX Upgrade and JET. The fueling profiles generally peak near the divertor x-point, and broader profiles are predicted for the open divertor geometry and horizontal targets in DIII-D than for the more closed geometries and vertical targets in AUG and JET. Significant fueling from the low-field side midplane may also occur when assuming strong radial ion transport in the far scrape-off layer. The dependence of the fueling profiles on upstream density is investigated for all three devices, and between the different codes for a single device. The validity of the predictions is assessed for the DIII-D configuration by comparing the measured ion current to the main chamber walls at the low-field side and divertor targets, and deuterium emission profiles across the divertor legs, and the high-field and low-field side midplane regions to those calculated by UEDGE and SOLPS.

Original languageEnglish
Article number124017
Pages (from-to)1-13
Number of pages13
JournalPlasma Physics and Controlled Fusion
Volume53
Issue number12
DOIs
Publication statusPublished - Dec 2011
MoE publication typeB1 Article in a scientific magazine

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