Glow discharge in hydrogen-water vapor mixture
Conference
·
OSTI ID:163081
Glow discharge in hydrogen is widely used in various modifications of the ion sources for generation both H{sup +} and H{sup {minus}}. This paper is devoted to experimental investigations of plasma parameters of positive column in hydrogen and water vapor mixture. The discharge was fired between two parallel 15 mm diameter Mo electrodes with 80 mm separation in a 15 mm inner diameter quartz tube. The total gas pressure and discharge current were changed between 0.2--2 Torr and 10--30 mA respectively. The electron temperature (T{sub e}) was measured with a Langmuir probe. The excitation temperature (T{sub exc}) was estimated from the intensity ratio of the emission lines H{sub {lambda}} and H{sub {delta}}. It was measured that this temperature depends strongly on the amount of H{sub 2}O due to the vibrational collisions between electrons and H{sub 2}O molecules. When the water vapor concentration was optimal, the authors observed a significant decreasing of T{sub e} and T{sub exc} in comparison with pure hydrogen case (4--5 times).
- OSTI ID:
- 163081
- Report Number(s):
- CONF-950612--; ISBN 0-7803-2669-5
- Country of Publication:
- United States
- Language:
- English
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