Abstract
A method has been developed to significantly suppress the effect of spurious pulses on the correlation spectrum in photon correlation experiments. When the correlation experiment is operated at a low count rate (<2 true pulses per total measured correlation time), the circuit rejects an incoming pulse stream whenever more than two pulses are detected in that interval. Details of this spurious noise pulse rejection circuit are presented. This circuit has been incorporated into an existing correlation computer system as an option selected by the operator. Application of this circuit to a test case where the spurious pulse correlations were excessive compared with the signal events yielded very accurate signal correlation spectra.
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