Computer for the Identification of Charged Particles

An improved computer circuit is described which can be used with appropriate counters to identify charged particles. Previously this system has been used to identify protons, deuterons, and tritons. More recently the computer has been used to separate He3 and He4 events. A sample calculation of the performance is given which shows that He3 and He4 events can be distinguished over a wide energy range with a single choice of computer parameters. Consideration is also given to the use of the method for low energy particles. It is concluded that, with easily attainable counter resolution, protons can be identified at energies extending below 1 Mev.