20 September 2004 Singlet oxygen kinetics in a double microwave discharge
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Proceedings Volume 5448, High-Power Laser Ablation V; (2004) https://doi.org/10.1117/12.548707
Event: High-Power Laser Ablation, 2004, Taos, New Mexico, United States
Abstract
Chemical lasers offer the highest powers necessary for many weapons applications, but require significant logistical support in the delivery of specialized fuels to the battlefield. In the Chemical Oxygen-Iodine Laser (COIL), which is the weapon aboard the Airborne Laser (ABL), gaseous chlorine and liquid basic hydrogen peroxide are used to generate the singlet oxygen energy reservoir. The goal of the current multi-university research program is to demonstrate an oxygen-iodine laser with electrical discharge production of singlet oxygen. Typically, oxygen discharges are limited to about 15% yield for singlet oxygen. The electron excitation cross-sections as a function of E/N are well established. However, the kinetics for electron and singlet oxygen interactions is considerably more difficult to study. Optical diagnostics for O2(a, b), and O, have been applied to a double microwave discharge flow tube. By examining the difference in singlet oxygen kinetics between the two discharges in series, considerable information regarding the excited-state, excited-state interactions is obtained. Under certain discharge conditions, the O2(a) concentration significantly increases outside of the discharge, even after thermal effects are accounted.
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Greg A. Pitz, Greg A. Pitz, Matthew A. Lange, Matthew A. Lange, Glen P. Perram, Glen P. Perram, } "Singlet oxygen kinetics in a double microwave discharge", Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); doi: 10.1117/12.548707; https://doi.org/10.1117/12.548707
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