Abstract
The analysis of plasma temperatures by self-reversed mercury lines is well established in the diagnostics of HID lamps. In mercury-free HID lamps or mercury containing lamps including a complex fill, however, the analysis of mercury lines could be impossible or difficult because additives may disturb the spectral line shape. This work analyzes the suitability of self-reversed scandium lines for temperature determination using Bartels method. Temperatures obtained by the three scandium lines analyzed here were found to agree very well with results from mercury lines, demonstrating their applicability as a diagnostic tool in multicomponent HID lamps.
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