Investigation of the temperature dependence of the excitation mechanism of the oxygeniodine chemical laser

Lilenfeld, H. V.; Carr, P. A. G.; Hovis, Floyd E.

doi:10.1016/0009-2614(82)85051-3

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…Paramagnetism of O 2 (a 1 g ) due to its orbital moment is a base for application of the electron paramagnetic resonance technique for SDO monitoring. This method is most prominent in terms of reliability and accuracy [119,120] but needs apparatus not commonly available. Vacuum absorption spectroscopy is another accurate method.…”

Section: The Methods Of Sdo Detection and Calibration Of Measuring Sy...mentioning

confidence: 99%

Physics and engineering of singlet delta oxygen production in low-temperature plasma

Ионин

Кочетов

Napartovich

et al. 2007

J. Phys. D: Appl. Phys.

260

190

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An overview is presented of experimental and theoretical research in the field of physics and engineering of singlet delta oxygen (SDO) production in low-temperature plasma of various electric discharges. Attention is paid mainly to the SDO production with SDO yield adequate for the development of an electric discharge oxygen–iodine laser (DOIL). The review comprises a historical sketch describing the main experimental results on SDO physics in low-temperature plasma obtained since the first detection of SDO in electric discharge in the 1950s and the first attempt to launch a DOIL in the 1970s up to the mid-1980s when several research groups started their activity aimed at DOIL development, stimulated by success in the development of a chemical oxygen–iodine laser (COIL). A detailed analysis of theoretical and experimental research on SDO production in electric discharge from the mid-1980s to the present, when the first DOIL has been launched, is given. Different kinetic models of oxygen low-temperature plasma are compared with the model developed by the authors. The latter comprises electron kinetics based on the accompanying solution of the electron Boltzmann equation, plasma chemistry including reactions of excited molecules and numerous ion–molecular reactions, thermal energy balance and electric circuit equation. The experimental part of the overview is focused on the experimental methods of SDO detection including experiments on the measurements of the Einstein coefficient for SDO transition and experimental procedures of SDO production in self-sustained and non-self-sustained discharges and analysis of different plasma-chemical processes occurring in oxygen low-temperature plasma which brings limitation to the maximum SDO yield and to the lifetime of the SDO in an electric discharge and its afterglow. Quite recently obtained results on gain and output characteristics of DOIL and some projects aimed at the development of high-power DOIL are discussed.

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Section: The Methods Of Sdo Detection and Calibration Of Measuring Sy...mentioning

confidence: 99%

Physics and engineering of singlet delta oxygen production in low-temperature plasma

Ионин

Кочетов

Napartovich

et al. 2007

J. Phys. D: Appl. Phys.

260

190

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“…7 The O 2 (b) concentration decays rapidly just outside the discharge and quickly attains a steady-state from the pooling of O 2 (a). 9 The collisional deactivation of O 2 (a) is very slow, and flow tube studies involving singlet oxygen are readily performed. 10 In the present study we seek to further understand the kinetics of these discharges, particularly the limitations on singlet oxygen yield imposed by electron -excited oxygen interactions.…”

Section: Introductionmentioning

confidence: 99%

Singlet oxygen kinetics in a double microwave discharge

Pitz¹,

Lange²,

Perram³

2004

High-Power Laser Ablation V

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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 oxygeniodine 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 O 2 (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 O 2 (a) concentration significantly increases outside of the discharge, even after thermal effects are accounted.

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The chemical oxygen-iodine laser: Comparison of a theoretical model with experimental results

Churassy

Bacis

Bouvier

et al. 1987

Journal of Applied Physics

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The experimental performance of a small-scale chemical oxygen-iodine laser is compared to a theoretical model. Measuring the consumption of O2 (1Δg) in the region of the flame indicates that less than five molecules of O2 (1Δg) are required to dissociate one I2 molecule. It is shown that the hyperfine relaxation rates in the iodine atom increase both the laser threshold and the active transverse length of the cavity.

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Investigation of the temperature dependence of the excitation mechanism of the oxygeniodine chemical laser

Cited by 7 publications

References 10 publications

Physics and engineering of singlet delta oxygen production in low-temperature plasma

Physics and engineering of singlet delta oxygen production in low-temperature plasma

Singlet oxygen kinetics in a double microwave discharge

The chemical oxygen-iodine laser: Comparison of a theoretical model with experimental results

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