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Alpha-Particle Gas-Pressure SensorAn 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 simple two-parameter current-voltage expression was developed to describe the dependence of the ion current on pressure. The parameters are the saturation-current pressure coefficient and mu/D, the ion mobility/diffusion coefficient. The sensor is useful in the pressure range between 0.1 and 1000 mb using a 1 - mu Ci(241) Am source. Experimental results, taken between 1 and up to 200 mb, show the sensor operates with an anode voltage of 5 V and a sensitivity of 20 fA/mb in nitrogen.
Document ID
19990095972
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Buehler, M. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Bell, L. D. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Hecht, M. H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 5, 1996
Publication Information
Publication: Journal of Vacuum Science and Technology. Part A
Volume: 14
Issue: 3
ISSN: 0734-2101
Subject Category
Instrumentation and Photography
Distribution Limits
Public
Copyright
Other