Aachen PK 2003 – wissenschaftliches Programm
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P: Plasmaphysik
P 17: Poster III
P 17.4: Poster
Donnerstag, 20. März 2003, 17:30–19:15, Foyer
Monte Carlo simulation of radiation transfer in fusion and lighting applications — •Sven Wiesen1, Detlev Reiter1, Petra Börner1, Matthias Born2, and Stefan Meier3 — 1Institute for Plasmaphysics, Research Centre Jülich GmbH, 52425 Jülich, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany — 2Philips Research Laboratories, Weisshausstr. 2, D-52066 Aachen, Germany — 3Institute for Laser- and Plasmaphysics, University of Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
Both in divertors of large nuclear fusion devices and in high pressure gas discharges used as modern lighting sources the line radiation opacity varies from optically thin to optically thick. For realistic plasma conditions a numerical evaluation of the radiation field requires Monte Carlo methods, as e.g. employed in the 3D EIRENE code. In non-LTE conditions the non-linearity in the problems, arising from the coupling of the fields of line photons and particles in the upper/lower level, can be treated by an iterative scheme. It is shown that in next-step fusion devices (ITER) opacity effects of Lyman-α line radiation are important for overall divertor dynamics. As a spin off, a detailed numerical bookkeeping of radiation transfer effects also in other plasma applications can be achieved by the same code development. Current conceptual design activities for mercury free gas discharges for lighting require quantification of radiation properties over a wide range of opacity parameters. A key numerical problem is the optimisation and adaptation of techniques for the transition from the optical thin to the optical thick limit within one single calculation.