Advanced spectroscopic diagnostics for lighting plasmas
Conference
·
OSTI ID:163172
- Univ. of Wisconsin, Madison, WI (United States). Physics Dept.
Advanced diagnostics based on vacuum ultraviolet laser induced fluorescence and high sensitivity absorption spectroscopy for glow discharge plasmas used in lighting are described. The resonance line of the atomic mercury ion at 194 nm is now accessible to tunable dye laser systems. Laser induced fluorescence provides excellent spatial and temporal resolution for mapping the relative density of mercury ions and other species in lighting plasmas. High sensitivity absorption spectroscopy using a synchrotron, a large (3 m) vacuum echelle spectrometer, and a CCD detector array complements laser diagnostics by providing absolute column densities. These diagnostics are providing a more quantitative understanding of the negative glow region of hot cathode Hg-Ar (fluorescent lamp) discharges.
- OSTI ID:
- 163172
- Report Number(s):
- CONF-950612--; ISBN 0-7803-2669-5
- Country of Publication:
- United States
- Language:
- English
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