Magnetic Spectrometer for 450-Mev Protons

Abstract

A 60° wedge‐focusing magnetic spectrometer has been built for use with the 450‐Mev proton beam of the Chicago synchrocyclotron. It has curved pole edges to produce good focusing in one plane only. The minimum line width obtainable is ∼¼% with an available solid angle of ∼1/2000 sterad. The deflection is vertical, and angular distributions can be measured from 7° to 173° without allowing the primary beam to strike the magnet yoke.