Physical Sciences Inc. Publications Abstract: Advanced Diagnostics for COIL and DOIL

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Abstract: Advanced Diagnostics for COIL and DOIL

S.J. Davis, W.T. Rawlins, S. Lee, M.L. Silva, W.J. Kessler, P.A. Mulhall, "Advanced Diagnostics for COIL and DOIL ," presented at SPIE High Power Laser Ablation V (Taos, NM) edited by Claude R. Phipps, , Proceedings of SPIE 5448 (25-30 April2004).

This paper was published in SPIE High Power Laser Ablation V, Proceedings of SPIE 5448 and is made available as an electronic reprint (preprint) with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Abstract

In this paper we discuss the application of sensitive, non-intrusive diagnostic techniques to characterize species in the flow that are critical for chemical oxygen iodine laser (COIL) devices and the electric discharge oxygen iodine laser(DOIL) concept. The key diagnostics include chemiluminescence to detect O2(a,b) and I(2P1/2) and tunable diode laser absorption measurements of I* and temperature. We have characterized variations in O and O2(a) yields with discharge power and oxygen mole fraction. We observe O2(a) yields to increase dramatically with decreasing oxygen mole fraction. We also discuss the application of a novel imaging diagnostic to obtain 2-D images of species concentrations and temperature.

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