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Proceedings Paper

Atomic iodine generation via F atoms for COIL
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Paper Abstract

Chemical generation of atomic iodine for a Chemical Oxygen-Iodine Laser (COIL) was investigated experimentally. This all-gas process includes atomic fluorine as an intermediate species. In the two-step reaction mechanism, F atoms are produced in reaction of molecular fluorine with NO and react further with hydrogen iodide to iodine atoms. The efficiency of this process was studied in dependence on mixing conditions, flow rate of reacting gases and pressure in the reactor. The maximum concentration of atomic iodine was obtained at approximately equimolar ratio of reacting gases (F2, NO and HI), which agrees with the stoichiometry of the production reactions. A shortage of any of the reacting gases limits the rate of atomic iodine formation. A considerable excess of F2 against NO at a simultaneous deficit of HI had a most detrimental effect on atomic iodine production. Sufficiently high concentrations of atomic iodine (5 to 8 x 1015 cm-3) can be achieved by this method even at pressure 4 - 9 kPa that enable to inject the gas with iodine atoms into the singlet oxygen flow upstream the nozzle throat in the chemical oxygen-iodine laser.

Paper Details

Date Published: 20 September 2004
PDF: 9 pages
Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); doi: 10.1117/12.544272
Show Author Affiliations
Otomar Spalek, Institute of Physics (Czech Republic)
Vit Jirasek, Institute of Physics (Czech Republic)
Miroslav Censky, Institute of Physics (Czech Republic)
Jarmila Kodymova, Institute of Physics (Czech Republic)
Ivo Jakubec, Institute of Inorganic Chemistry (Czech Republic)
Gordon D. Hager, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 5448:
High-Power Laser Ablation V
Claude R. Phipps, Editor(s)

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