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International Journal of SpectroscopyVolume 2010 2010, Article ID 374372, 5 pages

Research Article

Institut für Energieforschung IEF - Plasmaphysik, Forschungszentrum Jülich GmbH, Euratom Association, Trilateral Euregio Cluster, 52425 Jülich, Germany

Physique des Interactions Ioniques et Moléculaires PIIM, UMR 6633 Université de Provence - CNRS, Centre de St. Jérôme, Case 232, 13397 Marseille Cedex 20, France

Received 15 April 2009; Accepted 3 June 2009

Academic Editor: Manuel Á. González

Copyright © 2010 J. Rosato et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Stark broadening of hydrogen lines is investigated in low-density magnetized plasmas, at typical conditions of magnetic fusion experiments. The role of time ordering is assessed numerically, by using a simulation code accounting for the evolution of the microscopic electric field generated by the charged particles moving at the vicinity of the atom. The Zeeman effect due to the magnetic field is also retained. Lyman lines with a low principal quantum number are first investigated, for an application to opacity calculations; next Balmer lines with successively low and high principal quantum numbers are considered for diagnostic purposes. It is shown that neglecting time ordering results in a dramatic underestimation of the Stark effect on the low- lines. Another conclusion is that time ordering becomes negligible only when ion dynamics effects vanish, as shown in the case of high- lines.





Autor: J. Rosato, D. Boland, M. Difallah, Y. Marandet, and R. Stamm

Fuente: https://www.hindawi.com/



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