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Hot vs. Cold Ionization Gauges
www.thinksrs.compressure measurements between 10-2 and 10-10 Torr: 1. In the hot cathode gauge (HCG) ionizing electrons from a thermionic cathode are accelerated by suitable electrodes into an ionizing space. 2. In the cold cathode gauge (CCG) ionization is caused by a circulating electron plasma trapped in crossed electric and magnetic fields.