Remote pumping of solid state lasers with nuclear driven fluorescers. Final report, October 1, 1990--March 31, 1993
Development of an electron density model, microwave propagation model and power density model was completed for various visible excimer gas media including the xenon oxide excimer (XeO*). In addition, a heat transfer model has been developed. Optimization of a microwave pumped excimer lamp has begun and the results indicate that high frequency modes can be excited efficiently. A model for power density in the cavity has been developed and indicates that 111 modes appear to be the most uniform. A He{sup 3} excited nuclear ``pumped`` lamp was built to take spectra of gas mixtures in a reactor environment. The effects of nuclear radiation on optical materials was examined from 350 nm to 950 nm. The results demonstrated that radiation effects are nonlinear with power. Additionally, radiation damage was strongest in the UV bandwidth. Studies were also made of radiation induced fluorescence. A method was developed to subtract radiation induced fluorescence from the fluorescence signal in the lamp. Using the results of radiation induced absorption and radiation induced fluorescence, a technique for determining absolutely calibrated spectra from the lamp was developed. Absolutely calibrated spectra from He, He-Ar, He-Xe, and He-Kr were taken. The results from this study were compared to electrically driven flashlamps. A heat pipe for a reactor experimentation with alkali metals was developed. Several experiments were run using the heat pipe filled with 5 grams of sodium. Radiation from the violet bands of sodium at around 436 nm was expected. Indeed observations of emission at 436 nm were made. The overall results of this work were: (1) development of a microwave excitation system which approximated nuclear ``pumping.`` (2) Development of methods to compensate for radiation induced absorption and radiation induced fluorescence in optical systems in high radiation environments. (3) Development of methods to obtain absolutely calibrated spectra from light.
- Research Organization:
- Missouri Univ., Columbia, MO (United States). Dept. of Nuclear Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-90ER13029
- OSTI ID:
- 10116322
- Report Number(s):
- DOE/ER/13029-T3; ON: DE94004846; BR: KE0103000/KV0200000
- Resource Relation:
- Other Information: PBD: 30 Nov 1993
- Country of Publication:
- United States
- Language:
- English
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