Improved production of O2(a1delta) in capacitively coupled radio-frequency discharges

J. W. Zimmerman; B. S. Woodard; J. T. Verdeyen; D. L. Carroll; T. H. Field; W. C. Solomon

doi:10.1117/12.773784

21 February 2008 Improved production of O₂(a¹Δ) in capacitively coupled radio-frequency discharges

J. W. Zimmerman, B. S. Woodard, J. T. Verdeyen, D. L. Carroll, T. H. Field, W. C. Solomon

Proceedings Volume 6874, High Energy/Average Power Lasers and Intense Beam Applications II; 68740C (2008) https://doi.org/10.1117/12.773784
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

Abstract

Experimental investigations of radio-frequency discharges in O₂/He/NO mixtures in the pressure range of 1-100 Torr and power range of 0.1-1.2 kW have indicated that O₂(a¹Δ) production is a strong function of geometry, excitation frequency, pressure and diluent ratio. The goal of these investigations was maximization of both the yield and flow rate (power flux) of O₂(a¹Δ) in order to produce favorable conditions for application to an electric oxygen-iodine laser (EOIL). At lower pressures, improvements in yield are observed when excitation frequency is increased from 13.56 MHz. As pressure is increased, increasing excitation frequency in the baseline configuration becomes detrimental, and yield performance is improved by reducing the discharge gap and increasing the diluent ratio. Numerous measurements of O₂(a¹Δ), oxygen atoms, and discharge excited states are made in order to describe the discharge performance dependent on various parameters.

Citation Download Citation

J. W. Zimmerman, B. S. Woodard, J. T. Verdeyen, D. L. Carroll, T. H. Field, and W. C. Solomon "Improved production of O₂(a¹Δ) in capacitively coupled radio-frequency discharges", Proc. SPIE 6874, High Energy/Average Power Lasers and Intense Beam Applications II, 68740C (21 February 2008); https://doi.org/10.1117/12.773784

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