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Journal ArticleDOI

Synchronization of ultraviolet-preionization in a Marx-driven TEA CO2 laser

T.Y. Tou, +3 more
- 01 Jun 1995 - 
- Vol. 27, Iss: 3, pp 163-166
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TLDR
In this article, a two-stage spark gap was used to control the predischarge, which produced the ultraviolet-preionization, and to generate a trigger pulse for the Marx bank, which excited the main discharge.
Abstract
In a TEA CO 2 laser a two-stage spark gap was used to control the predischarge, which produced the ultraviolet-preionization, and to generate a trigger pulse for the Marx bank, which excited the main discharge. The time-sequence of the predischarge and the trigger pulse could be reversed so that the main discharge could commence before the preionization process. This set-up has enabled temporal synchronization on the laser performance, or basically the time delay between the pre- and the main discharges, to be investigated from about − 150 ns to 600 ns.

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Citations
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Journal Article

Volume ultraviolet preionization from bare sparks

TL;DR: In this paper, the physical processes of photoionization in CO 2, N 2, He gas mixtures containing known concentrations of ionizable impurity were studied in two ways: spectroscopic emission and absorption measurements, and by direct collection of photosensitive electrons.
Journal ArticleDOI

Role of triethylamine in a high-energy wavelength-selective transversely excited atmospheric CO2 laser

TL;DR: In this article, the influence of triethylamine on the discharge stability and line characteristics of a high-energy wavelength-selective transversely excited atmospheric (TEA) CO2 laser are experimentally studied.
References
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Journal ArticleDOI

Large aperture CO 2 laser discharges

TL;DR: In this article, a weak volumetric preionization of the active gas region produced by UV radiation has been used to generate atmospheric-pressure CO 2 laser discharges between electrodes separated by 30 cm, having total cross sections of ∼600 cm2.
Journal ArticleDOI

Development of a high‐repetition‐rate mini‐TEA CO2 laser

TL;DR: In this paper, a 1.8 cm3 active volume gas-recirculating mini-TEA CO2 laser is described, capable of operating at 500 Hz with an average output of 10 W.
Journal Article

Volume ultraviolet preionization from bare sparks

TL;DR: In this paper, the physical processes of photoionization in CO 2, N 2, He gas mixtures containing known concentrations of ionizable impurity were studied in two ways: spectroscopic emission and absorption measurements, and by direct collection of photosensitive electrons.
Journal ArticleDOI

Ultraviolet photoionization in TEA lasers

TL;DR: In this paper, the effect of selected additives on photoionization was demonstrated and the results showed that a significant enhancement in electron density can be achieved, and the X-band microwave interferometer data provided additional insight into the mechanisms involved and further substantiated the effectiveness of the technique in high-powered CO 2 laser design.
Journal ArticleDOI

Volume ultraviolet preionization from bare sparks

TL;DR: In this paper, the physical processes of photoionization in CO 2, N 2, He gas mixtures containing known concentrations of ionizable impurity were studied in two ways: spectroscopic emission and absorption measurements, and by direct collection of photosensitive electrons.
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