COUNTING_RATE_METER

Published:2009/7/13 4:49:00 Author:May | From:SeekIC

Uses three Optical Electronics 9827 opamps to amplify, square up, and integrate input pulses from event detector, to give integrated DC voltage that is function of counting rate. This voltage is compressed by 2538 DC logamp having 60-dB dynamic range for driving chart recorder. Values of R and C de-pend on counting rate, Well-regulated power supply is required because this determines am-plitude of squared pulses that drive integrator. Applications include counting photons of photomultiplier or nuclear particles of solid-state detector. Logamp compresses output of integrator to eliminate need for scale changing while giving constant accuracy over wide dy-namic range of counting rates. - Logarithmic Counting Rate Readout, Optical Electronics, Tucson, AZ, Application Tip 10106.



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