Vacuum Gauges with Radioactive Emitters

Authored by: Igor Bello

Vacuum and Ultravacuum

Print publication date:  November  2017
Online publication date:  November  2017

Print ISBN: 9781498782043
eBook ISBN: 9781315155364
Adobe ISBN:

10.1201/9781315155364-25

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Abstract

Vacuum gauges with radioactive emitters that use alpha particles for ionization of residual vacuum atmosphere are called alphatrons. 976–978 Although these devices are commercially unavailable in vacuum technology now, it is worth discussing their physical principles because these devices are similar to other ionization gauges in some aspects, particularly ionization effects at low pressures and measurement of the electronic response. In addition, future applications of these gauges particularly in high-altitude pressure measurements or in partial pressure measurements with the assistance of adsorption traps are possible. In particular, the attractive features of these devices are gauge simplicity, large operation range, and small size and mass.

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