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Spectroscopic Study of CO2 Decomposition in Sealed-off CO2 Lasers

✍ Scribed by O. Kylián; C. Leys; V. Hrachová

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
290 KB
Volume
41
Category
Article
ISSN
0005-8025

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✦ Synopsis

The CO 2 decomposition in a DC glow discharge in a sealed-off CO 2 laser mixture (6% CO 2 : 20% N 2 : 74% He) in the pressure range 2 -22 Torr is investigated. Both the time evolution and the steady-state CO 2 decomposition are studied by means of time resolved optical emission spectroscopy. A decrease of the time to reach steady-state values of particles concentrations in the discharge system with decreasing pressure and increasing discharge current is observed. The degree of CO 2 decomposition rapidly decreases with increasing pressure and exhibits only a small increase with increasing discharge current. This behaviour can be explained by the variations of the reduced electrical field strength E/N and of the electron density. Also the influence of the ballast volume is discussed in this work.

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