Comparison of the sensitivities of ionization gauges to hydrogen and deuterium

Ionization gauges are commonly considered to have identical sensitivity to hydrogen and deuterium due to the identical atomic configuration of the two gas molecules. We compared, experimentally, the sensitivity of twelve hot ionization gauges to hydrogen and deuterium and found significant differenc...

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Bibliographic Details
Published in:Vacuum 1995, Vol.46 (1), p.9-12
Main Authors: Jousten, K, Röhl, P
Format: Article
Language:English
Subjects:
Exact sciences and technology
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
Vacuum apparatus and techniques
Vacuum gauges
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Summary:Ionization gauges are commonly considered to have identical sensitivity to hydrogen and deuterium due to the identical atomic configuration of the two gas molecules. We compared, experimentally, the sensitivity of twelve hot ionization gauges to hydrogen and deuterium and found significant differences between gauges. These differences depended on the specific gauge and systematically changed with operating treatments; this effect can be explained by a different, secondary electron production of hydrogen and deuterium ions when hitting the ion collector.
ISSN:0042-207X
1879-2715
DOI:10.1016/0042-207X(95)80051-4