Kiel 2004 – wissenschaftliches Programm
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P: Plasmaphysik
P 3: Postersitzung: Niedertemperaturplasmen Plasmatechnologie I, Diagnostische Methoden I
P 3.1: Poster
Montag, 8. März 2004, 17:45–19:30, Foyer
Determination of spectral line-broadening data in high pressure discharge lamps — •Matthias Born1, Margarita Baeva2, Stefan Meier3, Matthias Weiss3, Holger Schubert3, Martin Stroesser1, and Detlev Reiter2 — 1Philips Research Laboratories Aachen — 2IPP, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster — 3ILPP, University of Duesseldorf
Zinc halides are considered as a possible candidate for replacement of mercury in high pressure discharge lamps. A crucial precondition for the design and optimisation of such lamps is the detailed and quantitative understanding of the energy balance. In particular, a detailed knowledge of spatial temperature profiles and gradients are of high relevance for the radiation transport properties.
Discharge lamps are studied by means of emission spectroscopy with absolute calibration in the range 200-833 nm. The experimental setup comprises a spectrograph (f=1m) with an attached CCD detector. The temperature profiles across the plasma radius are determined from measured spectral line-shapes of self-reversed lines (see Karabourniotis, J. Phys. D: Appl. Phys., 16, 1267-81 (1983)). The derived temperatures and calculated densities of plasma species serve as input parameters for the solution of the radiation transfer equation. Simulated emission spectra are compared with experimental data in order to determine the line broadening parameters (resonance, v. d. Waals and Stark broadening). Good agreement of calculated and measured radiances is obtained.
This work is supported by the BMBF under contract numbers 13N8074, 13N8263, 13N8072 and 13N8264