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Life Tests of Tungsten and Tantalum Filaments in Ion Gauges
Results of an investigation carried on for the following purposes: (1) To determine the relative life of filaments when operated at low emission (low temperatures) as compared to those operated at high emission values. (2) To determine the nature of the dependence of life upon the initial diameter of the filament. (3) To determine the effect of varying concentrations of water vapor and air upon the life of the filaments. (4) To determine the relative life characteristics of tantalum as compared to tungsten.
Date:
August 9, 1949
Creator:
Bush, W. E.
System:
The UNT Digital Library
The Beta-Gamma Surface Dosage Rate from Natural Uranium
From summary: "Report discussing the beta-gamma dosage rate at the surface of a natural uranium disc. Measurements were taken using a Ryerson electrometer and an extrapolation ionization chamber."
Date:
August 22, 1949
Creator:
Kalmon, Ben
System:
The UNT Digital Library