A Simplified Chronotron-Type Timing Circuit

A timing circuit is described similar in principle to the Neddermeyer ``chronotron,'' but with the following simplifications and modifications: parallel-wire polythene-tape line to eliminate co-ax ``plumbing,'' germanium crystal detectors, and a delay-line presentation circuit. This circuit uses a single common amplifier for all pulses, which increases stability, makes adjustment easy, and effects a tenfold saving in the number of tubes. It simultaneously records time intervals in two ranges, e.g., 0–0.1 and 0–5 μsec. The precision is 1×10−9 sec., but may be increased at the expense of the range. Problems connected with coupling the instrument to parallel-plate counters are discussed.