Summary of Session D: Simulations of Electron Cloud Build up I

This report is a brief summary of the session D of the workshop ECLOUD04 about electron cloud build up simulations (Part I). In this session the status of some of the existing codes for the build up simulations has been reported and updates on the progress towards new powerful 3D and self-consistent codes have been presented. Simulations specifically applied to damping rings for linear colliders (CLIC, TESLA, NLC), DAΦNE, PETRA III, ISIS, ESS have been also discussed. LIST OF THE CONTRIBUTIONS The talks presented in session D, and relative speakers, were: • Electron cloud build up simulations with ECLOUD, Daniel Schulte (CERN) • Numerical and computational methods in electron cloud simulations: present and future, Andreas Adelmann (PSI) • Overview of the electron cloud studies for the future linear colliders, Mauro Pivi (SLAC) • Prediction of electron cloud effects in synchrotron light source PETRA III, Rainer Wanzenberg (DESY) • E-cloud simulations for DAΦNE, Cristina Vaccarezza (LNF-INFN) • E-cloud effects in the TESLA and CLIC positron damping rings, Rainer Wanzenberg (DESY) • Status report on the merging of the electron cloud code POSINST with the 3-D accelerator PIC code WARP, Jean Luc Vay (LBNL) • Simulation of electron cloud build up in the ISIS proton synchrotron and related machines, Giulia Bellodi (RAL) • Effect of the beam instability on the density of the cloud/Secondary yield in the presence of the beam, Sam Heifets (SLAC)