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Escape factors for spectral line emission along a given line-of-sight and for collisional radiative population calculations of excited levels in atoms and ions have been calculated on the basis of some simplifying approximations by means of a personal computer (PC) computer program. A wide choice of spectral line profiles, spatial emission profiles and plasma geometry cases is available in the code. The population escape factor can be calculated in the centre of a plasma sphere, in the mid-plane of a disk, or on the axis of a cylinder. The underlying definitions of the escape factor analysis are presented and the approximations in the solution of the equation of radiative transfer are explained. The results are applied to a measurement of the neutral hydrogen density from the self-absorption of L(beta) in ASDEX Upgrade divertor I.

Additional information

Authors: BEHRINGER K, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP 10/11 EN (1998) 20pp.
Availability: Available from the Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
Record Number: 199810998 / Last updated on: 1998-09-15
Original language: en
Available languages: en