Chart Recording of Microsecond Pulse Amplitudes

Abstract

A peak voltmeter circuit is described which will record, on an Esterline‐Angus chart, the amplitudes of microsecond pulses generated at random in ionization chambers or similar counters. Slow response of the recording pen prohibits the resolution of pulses less than one second apart. Provision is made for selecting pulses coincident with some triggering event as the low counting rates suitable for the circuit are most often encountered in coincidence experiments. Coincidence resolving times as low as five microseconds may be attained, and the linearity is such that input pulse amplitudes from 2 to 100 volts are reproduced on the chart to within ±1 volt.