Beam stability and vacuum chamber design

Abstract

A number of different instabilities may limit the single beam current as well as the multi−bunch current in a storage ring. All these instabilities result from the electromagnetic interaction of the particle beam with its environment. All limits on the beam current are proportional to the energy, E, of the beam, to the bunch length, σl, and inversely proportional to the impedence, Z, of the vacuum chamber. The dependencies are important guidelines for the design of the vacuum chambers and RF cavities. A discussion of these limitations in the design of synchrotron radiation sources is given. (AIP)