Continuous Energy Monitor for the External Beam of a Cyclotron

Abstract

A simple scintillation counter system is described which monitors the average energy of particles in the external beam of a cyclotron and simultaneously serves as a current integrator. Energy changes are continuously presented on a chart recorder, thus allowing the machine energy to be held constant to a high degree of accuracy over extended runs. In typical operation using 14‐Mev deuterons, the average energy may be held constant to within 0.07%.