Multistage time averaging filters for timing measurements with large counters

A method is described which uses multistage logic circuitry to accurately determine the 'true time' that a particle traverses as long counter essentially independent of the 'hit' position. The accuracy increases rapidly with the number of stages used in the circuit. Several channels of the simplest type with about +-70 ps resolution over a total range of 4.2 ns habe been built, tested and used successfully in experiment E450 at the ZGS. (orig.)