A circuit is described for use with Geiger-counter spectrometers which employ a second Geiger counter to monitor the X-ray output. It allows neither counter to record while either is quenched, and thus ensures that the ratio of counts recorded is equal to the ratio of quanta received and is independent of the quench times, the mean X-ray output and the X-ray output waveform. The same principle should be applicable to other methods of monitoring. The circuit described also suppresses the background counts for the fraction of the cycle during which a self-rectified X-ray tube produces no characteristic radiation.
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Eastabrook et al. (1953) studied this question.