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IGC100- Degassing Bayard-Alpert Ionization Gauges www.thinkSRS.com 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