Photoelectron emission studies for the LHC beam screen

This paper describes experimental studies of the effect of a dipole field on the photoelectron emission and on the photon reflectivities from Large Hadron Collider (LHC) beam screen material. These studies were performed using synchrotron radiation from the VEPP-2M storage ring at the Budker Institute of Nuclear Physics (Novosibirsk). The particular surface roughness and geometry of the prototype LHC beam screen material requires dedicated experimental measurements. The experiments were performed under conditions close to those expected in the LHC. These experimental results are important input for the final design of the LHC beam screen. (6 refs).