A Logarithmic Counting-Rate Recorder
Denman Shaw, Ruth N. Weltmann · Review of Scientific Instruments · 1952
A counting-rate recorder is described which in conjunction with a commercial scaler and associated circuits will plot directly points that are proportional to the logarithm of the time for a predetermined number of counts. The record of the logarithm of the counting rate on a linear scale is obtained from the angle of rotation of a cylinder by means of a logarithmic spiral cut helically around the cylinder, where the angle of rotation corresponds to the time interval. Instrument errors are shown to be less than one percent.