Vacuum Requirements for the Cascade Synchrotron

Abstract

This report is an examination of the principal characteristics of a vacuum system for the proposed 300 Bev cascade synchrotron 1). In par- ticular, we wish to see whether the small aperture and large circumference of the Main Ring present vacuum difficulties. Gas scattering losses, eddy currents in the vacuum chamber wall, and cost of a 5-mile vacuum system are of special interest. Attention has been directed primarily toward the Main Ring. The 10 Gev Booster Ring 1) has vacuum requirements similar to existing accelerators, and it is presumed that duplication or modification of such vacuum systems will be practical. Our concern here is to see that no major problem is ignored, and to obtain representative numbers for a possible design.