An Electron Accelerator with an Air-cored Field

Abstract

ARISING primarily from the fact that iron becomes saturated in the region of 10,000–20,000 gauss, high-energy ions and electrons have been obtained from cyclotrons and betatrons only by the use of magnetic fields of large orbital radii. The question has, therefore, often been raised as to the possibility of using iron-free fields of short duration, especially as fields of the highest magnitude have been obtained in this way. The following note describes an experimental resonance accelerator for electrons which uses such an air-cored field.