NCI3 as a source of NCI(a) for an NCI(a)-I laser

William E. McDermott; Robert D. Coombe; Julanna Gilbert; Zane Lambert; Mikaila Heldt

doi:10.1117/12.610964

23 March 2005 NCI₃ as a source of NCI(a) for an NCI(a)-I laser

William E. McDermott, Robert D. Coombe, Julanna Gilbert, Zane Lambert, Mikaila Heldt

Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005) https://doi.org/10.1117/12.610964
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic

Abstract

NCI₃ is a more stable source of NCI(a) than HN₃. The use of NCI₃ as a source of NCI(a¹Δ) for use in an iodine transfer laser has been modeled. The model suggests that gain can be obtained on the spin orbit transition of the iodine atom at 1.315µm in a purely chemical system. New quenching rates of NCI(a) by H₂ and HCI show these species are not a serious problem in scaling the NCI₃ system to high energy densities. The measurements of NCI(a) in our flow tube system are obscured at early times by CI₂(B-X) radiation from the CI atom induced decomposition of NCI₃. We have measured the contribution of this emission and find that the profile more closely matches the profile predicted by the kinetics code. We have measured the yield of CI atoms produced by a microwave discharge of 5% CI₂ in He and find a dissociation fraction of about 25% in agreement with previous studies by Manke and Setser. The yield was measured by titrating the CI atoms with HI and observing the HCI(v=1) radiation. In studies of the production of NCI₃, we have found that the yield of NCI₃ is independent of the gas side mass transfer conditions. Our current reactor produces an NCI₃ yield of about 20% relative to CI₂. Since the production of higher flows of NCI₃ is important for a laser experiment, we present some ideas for scaling NCI₃ to higher flow rates. The use of NCI₃ as a source of NCI(a¹Δ) for use in an iodine transfer laser has been modeled. The model suggests that gain can be obtained on the spin orbit transition of the iodine atom at 1.315µm in a purely chemical system. The experimental data obtained to this point supports the model predictions.

Citation Download Citation

William E. McDermott, Robert D. Coombe, Julanna Gilbert, Zane Lambert, and Mikaila Heldt "NCI₃ as a source of NCI(a) for an NCI(a)-I laser", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); https://doi.org/10.1117/12.610964

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