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IGC100- Degassing Bayard-Alpert Ionization Gauges
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Degassing Bayard-Alpert Ionization
Gauges
Introduction
The cleanliness of an ionization gauge has a considerable effect on its
performance.
To reduce the outgassing in a Bayard-Alpert gauge (BAG) to a negligible level,
and minimize the effects of electron-stimulated desorption (ESD) on low pressure
measurements, the outgassing technique known as "Degassing" is often
employed to drive off the gas molecules adsorbed on the anode grid structure.
During degas the electrodes are degassed by heating to a temperature of 900