Since the vacuum chamber designs are optimized and the impedances reduced by orders of magnitude compared with previous accelerators, the electron cloud has become an issue which might seriously limit the performance of future (and existing) proton or positron machines. At CERN we presently perform two types of electron cloud simulations. The first addresses the build up of the electron cloud during the passage of a bunch train, the second concentrates on the single bunch instability induced by these electrons. I describe the essential ingredients and the underlying physics models for these simulations. I then present example results, such as the cloud build up in CERN SPS, the heat load in the LHC arcs and the cloud build up in its experimental areas, the electron densities in the damping rings of future colliders, the synergy between electron cloud, regular impedance and space charge, transverse and longitudinal short range wake fields in the CERN SPS.
Organiser(s): Werner Herr / SL Division
Note: Tea and coffee will be served at 15:30 in front of the Auditorium