Differential Counting with Reversible Decade Counting Circuits

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Abstract
Three circuits were designed and built to apply a reversible decade counting circuit to the direct measurement of the difference in the counting rate from two counter tube telescopes used in cosmic‐ray research. The circuits are equally applicable to the direct measurement of the difference in the strength of two radioactive samples. An input circuit prevents two pulses from the Geiger tubes from arriving simultaneously at the first ring‐of‐ten. A driving circuit switches and shapes the pulses for correct bi‐directional operation of the ring‐of‐ten. A coupling circuit permits two decade rings to be operated in cascade, giving a differential electronic scale of 100.
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