High Intensity Accelerators below 1 GeV

A brief description is presented of high-intensity accelerators being considered at a number of laboratories for operation in the energy range of from 400 to 1000 Mev. Various types are included, such as the sector-focusing cyclotron, the negative-ion cyclotron, the linear accelerator, and the separated-orbit cyclotron. It is clear that at present designs exist whereby the intensity of a beam of protons can be increased by a factor of at least a thousand over that currently available. When these machines become available, research by physicists and bio-medical workers will undoubtedly be enhanced significantly.