Constant Current Source for Instrument Calibration

1 July 1966

journal article
research article
Published by AIP Publishing in Review of Scientific Instruments

Vol. 37 (7) , 919-922
https://doi.org/10.1063/1.1720364

Abstract

Two current sources which give a constant current over a wide range of applied voltage have been built for use in calibrating electrometers having input resistors in the 10⁺¹⁰ to 10⁺¹² Ω range. The sources consist of sealed parallel plate ionization chambers having one electrode coated with ²⁴¹Am. Calibrations using the rate of charge method spaced over a period of 1 year define the respective current output of the sources as (6.943±0.003)×10⁻¹¹ and (4.263±0.004)×10⁻¹² A.

Keywords

CURRENT SOURCE
OUTPUT
RESISTORS
GIVE
INSTRUMENT
INPUT
241AM
PLATE
VOLTAGE
CHARGE

This publication has 1 reference indexed in Scilit:

The saturation curve at high ionization intensity
British Journal of Applied Physics, 1952