Geiger-Mueller tube coincidence loss correction circuit

Details Geiger-Mueller tube coincidence loss correction circuit Geiger-Mueller tube coincidence loss correction circuit

1980-07-23

1982-01-19

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250388, G01T 118, H01J 4702

Patent

active

043119093

ABSTRACT:
A Geiger-Mueller (GM) tube coincidence loss correction circuit for automatically compensating for the dead time of the GM tube in an analog system so that the reading provided by the meter more accurately reflects the true radiation level. The electrical output pulses from the GM tube are differentiated and provided to a retriggerable one-shot multivibrator circuit which produces in response to each GM tube pulse a corresponding output pulse of predetermined duration greater than the dead time of the Geiger tube. The output pulse signal from the multivibrator circuit advances an analog ratemeter circuit and also effectively disables "time" for the duration of the output pulse by opening an analog switch connected in the discharge path of the integrating capacitor in the ratemeter circuit to maintain constant the charge thereon.

REFERENCES:
patent: 3366791 (1968-01-01), Markow
patent: 3814937 (1974-06-01), Lowes
patent: 3959653 (1976-05-01), Lee et al.
patent: 3984690 (1976-10-01), Marshall et al.
patent: 4090082 (1978-05-01), Marshall

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