Mg. Buehler et al., ALPHA-PARTICLE GAS-PRESSURE SENSOR, Journal of vacuum science & technology. A. Vacuum, surfaces, and films, 14(3), 1996, pp. 1281-1287
Citations number
13
Categorie Soggetti
Physics, Applied","Materials Science, Coatings & Films
An approximate model was developed to establish design curves for the
saturation region and a more complete model developed to characterize
the current-voltage curves for an alpha-particle pressure sensor. A si
mple two-parameter current-voltage expression was developed to describ
e the dependence of the ion current on pressure. The parameters are th
e saturation-current pressure coefficient and mu/D, the ion mobility/d
iffusion coefficient. The sensor is useful in the pressure range betwe
en 0.1 and 1000 mb using a 1-mu Ci Am-241 source. Experimental results
, taken between 1 and up to 200 mb, show the sensor operates with an a
node voltage of 5 V and a sensitivity of 20 fA/mb in nitrogen. (C) 199
6 American Vacuum Society.