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Multi‐fluid code simulation of DIII‐D filterscope data including reflection of light from plasma‐facing surfaces
Author(s) -
Hollmann E. M.,
Pigarov A. Yu.
Publication year - 2004
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200410046
Subject(s) - divertor , ray tracing (physics) , plasma , reflection (computer programming) , diii d , physics , code (set theory)
A comparison is made between solutions of the UEDGE multi‐fluid edge code and the full array of 24 poloidal and tangential D α and CIII filterscope views available in DIII‐D for a lower single null L‐mode discharge. Wall reflections are included using measured graphite tile reflection data together with a 3D ray tracing code. It is found that divertor view chords are relatively unperturbed by reflections, while main chamber views can be dominated by reflected light. Main chamber view chords are shown to be important in distinguishing between different radial transport models: a hybrid model including both convection and diffusion is found to match measured main chamber D α brightnesses well, while a pure diffusive model gives brightnesses which are of order 100× too small. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)