Theory of He+2+O2 charge exchange laser

Ali, A. W.

doi:10.1063/1.324627

Journal of Applied Physics

1978

DOI: 10.1063/1.324627

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Theory of He+2+O2 charge exchange laser

A. W. Ali

Abstract: The kinetics of the O+2 first-negative band laser due to near-resonance charge exchange between He+2 and O2 are presented. It can be excited in the afterglow of a discharge in a high-pressure He and O2 mixture (He≫O2). Gain calculation, however, is presented for discharges due to high-energy proton beams advocating their use for high-pressure gas lasers. In addition, a comment is made on the disappearance of 3914 laser lines with increasing N2 density in the He+2+N2 charge exchange laser.

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1983

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Cited by 6 publications

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Intense proton beam excitation of the high pressure Ar/N2 laser

Wiley

Hammer

1983

Journal of Applied Physics

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In this paper, parametric studies are presented of a high pressure Ar/N2 gas laser excited by an intense proton beam from a magnetically insulated diode. Using power deposition of up to 140 MW/cm3, gas pressure up to 3040 Torr, variable N2 fraction (5%–90%), and several mirror reflectivities and gain lengths, laser power (up to 500 kW), efficiency (≲0.4%), gain, threshold conditions, and spectral characteristics have been studied. Laser action was achieved at three wavelengths in the second positive band of N2: 337.1, 357.1, and 380.5 nm. Comparison of the observations with predictions of a model showed that emission at all three wavelengths was expected, and initiation times and pulse durations of the three lines were accurately predicted. Observed similarities and differences between proton beam and electron beam excitation of the Ar/N2 laser are discussed.

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Intense proton beam excitation of the high pressure Ar/N2 laser

Wiley

Hammer

1983

Journal of Applied Physics

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Intense proton-beam-pumped Ar-N2 laser

Golden

Eden

Mahaffey

et al. 1978

Applied Physics Letters

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Gas laser action using a current and space-charge-neutralized proton beam as a pump source has been demonstrated. Stimulated emission at 357.7 and 380.5 nm, corresponding to the v′=0→v″=1 and v′=0→v″=2 transitions of the N2 (C→B) band, has been observed in Ar/5%N2 gas mixtures. In comparison with electron beams, protons appear to be more efficient for excitation sources of high-pressure uv and visible lasers.

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Laser action at 3577 Å in proton-beam-pumped Ar-N2 mixtures

Wiley

Hammer

McFarlane

1979

Applied Physics Letters

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Laser action at 3577 Å has been achieved in argon/nitrogen mixtures of 400–1140 Torr total pressure by use of an intense proton beam from a magnetically insulated diode. The threshold for laser action in 700 Torr of 75% Ar/25% N2 was ∼1.3 MW/cm3 of deposited proton beam power. Laser power increased nearly four orders of magnitude as the deposited energy was raised to 15 times the threshold value. Amplified spontaneous emission increased rapidly with a deposited proton power of ≳16 MW/cm3. A maximum laser intensity of 450 kW/cm2 (1.1 mJ for 20 nsec FWHM with a 0.12-cm2 area) was obtained, without optimization of the output coupling mirror, in 25% N2 mixtures at 1140 Torr total pressure.

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Theory of He+2+O2 charge exchange laser

Cited by 6 publications

References 20 publications

Intense proton beam excitation of the high pressure Ar/N2 laser

Intense proton beam excitation of the high pressure Ar/N2 laser

Intense proton-beam-pumped Ar-N2 laser

Laser action at 3577 Å in proton-beam-pumped Ar-N2 mixtures

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