Proton beam profile measurements with synchrotron light

Abstract

In circular proton accelerators, the synchrotron radiation emitted by high energy beams at the edges of bending magnets contains an appreciable amount of visible light. This effect is used in the CERN SPS to measure by a non interceptive method the transverse proton density distribution above 200 GeV. The device consists of a telescope followed by an image sensor and electronics processing; its performances and some examples of applications are given in this paper.