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Pressure Measurement Using Field Electron Emission Phenomena
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 Title & Authors
Pressure Measurement Using Field Electron Emission Phenomena
Cho, Boklae;
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Adsorption of residual gas molecules damped the emission current of a W (310) field electron emission (FE) emitter. The damping speed was linearly proportional to the pressure gauge readings at pressure ranging from to , and the proportionality constant was employed to measure pressure in the range. A time plot of FE current revealed the existence of an "initial stable region" after the flash heating of W(310) FE, during which the FE current damps very slowly. The presence of non-hydrogen gas removed this region from the plot, supplying a means of qualitatively analysing the gas species.
Pressure;Field electron emission;Adsorption;Work function;Extreme high vacuum;
 Cited by
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