Abstract
At the Paul Scherrer Institute the routine operation of the proton accelerator facility at a beam power of 1 megawatt and more [1] has been a strong motivation to steadily enhance the knowledge on space charge effects. Various tracks are followed to serve this goal. Reporting on these activities will proceed using some selected examples. Predictions from analytical and empirical formulas and simple simulation models are compared to observed beam behavior. The two dimensional space charge simulation programs have been enhanced to become easily portable and to be able to model the actual phase space density distribution more exactly. A leading edge three dimensional space charge simulation framework is being developed in collaboration with CERN and Los Alamos. Various validation runs for the different space charge simulation tools are using analytically solvable configurations and cross-validation against other codes. At PSI detailed measurements of beam properties for different intensity levels have been made and new beam diagnostic equipment is being developed to reveal further information on beam properties, depending on space charge.
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