Influence of frequency on O2(a 1Δ) and oxygen atom production in transverse radio-frequency discharges

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

doi:10.1088/0022-3727/41/19/195209

Influence of frequency on O₂(a ¹Δ) and oxygen atom production in transverse radio-frequency discharges

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

Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Experimental investigations of radio-frequency discharges in O ₂/He/NO mixtures in the pressure range 1-100 Torr and power range 0.1-1.2 kW have indicated that O₂(a ¹Δ) 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 the flow rate (power flux) of O₂(a ¹Δ) in order to produce favourable 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 in the baseline 50 mm gap configuration, increasing excitation frequency becomes detrimental. O₂(a ¹Δ) yield performance is improved at high pressure by reducing the discharge gap and increasing the diluent ratio. Numerous measurements of O₂(a ¹Δ), oxygen atoms and discharge excited states are made in order to describe the discharge performance dependent on various parameters.

Original language	English (US)
Article number	195209
Journal	Journal of Physics D: Applied Physics
Volume	41
Issue number	19
DOIs	https://doi.org/10.1088/0022-3727/41/19/195209
State	Published - Oct 7 2008

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

Online availability

10.1088/0022-3727/41/19/195209

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title = "Influence of frequency on O2(a 1Δ) and oxygen atom production in transverse radio-frequency discharges",

abstract = "Experimental investigations of radio-frequency discharges in O 2/He/NO mixtures in the pressure range 1-100 Torr and power range 0.1-1.2 kW have indicated that O2(a 1Δ) 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 the flow rate (power flux) of O2(a 1Δ) in order to produce favourable 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 in the baseline 50 mm gap configuration, increasing excitation frequency becomes detrimental. O2(a 1Δ) yield performance is improved at high pressure by reducing the discharge gap and increasing the diluent ratio. Numerous measurements of O2(a 1Δ), oxygen atoms and discharge excited states are made in order to describe the discharge performance dependent on various parameters.",

author = "Zimmerman, {J. W.} and Woodard, {B. S.} and Verdeyen, {J. T.} and Carroll, {D. L.} and Field, {T. H.} and Benavides, {G. F.} and Solomon, {W. C.}",

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AU - Zimmerman, J. W.

AU - Woodard, B. S.

AU - Verdeyen, J. T.

AU - Carroll, D. L.

AU - Field, T. H.

AU - Benavides, G. F.

AU - Solomon, W. C.

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N2 - Experimental investigations of radio-frequency discharges in O 2/He/NO mixtures in the pressure range 1-100 Torr and power range 0.1-1.2 kW have indicated that O2(a 1Δ) 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 the flow rate (power flux) of O2(a 1Δ) in order to produce favourable 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 in the baseline 50 mm gap configuration, increasing excitation frequency becomes detrimental. O2(a 1Δ) yield performance is improved at high pressure by reducing the discharge gap and increasing the diluent ratio. Numerous measurements of O2(a 1Δ), oxygen atoms and discharge excited states are made in order to describe the discharge performance dependent on various parameters.

AB - Experimental investigations of radio-frequency discharges in O 2/He/NO mixtures in the pressure range 1-100 Torr and power range 0.1-1.2 kW have indicated that O2(a 1Δ) 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 the flow rate (power flux) of O2(a 1Δ) in order to produce favourable 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 in the baseline 50 mm gap configuration, increasing excitation frequency becomes detrimental. O2(a 1Δ) yield performance is improved at high pressure by reducing the discharge gap and increasing the diluent ratio. Numerous measurements of O2(a 1Δ), oxygen atoms and discharge excited states are made in order to describe the discharge performance dependent on various parameters.

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