Cold Cathode Ionization Gage
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Cold Cathode Ionization Gage
A ionization
gage (vacuum gage) in which the ions are produced by a discharge between
two electrodes, both near room temperature. The discharge usually takes place
in the presence of a magnetic field which lengthens the path of the electrons
between cathode and anode.
One form of gage is a transparent tube in which the color and form of a
cold-cathode discharge, without the presence of a magnetic field, give an
indication of the pressure and the nature of the gas. The Philips ionization
gage, or Penning gage, is a cold-cathode ionization gage in which a magnetic
field is used. Various modifications of the Penning gage are named after the
inventors, and certain types are referred to as magnetron vacuum gages.
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use