Abstract
The interaction between a low density electron cloud in a circular particle accelerator with a circulating charged particle beam is considered. The particle beam’s space charge attracts the cloud, enhancing the cloud density near the beam axis. Beam‐ cloud interaction is studied with a plasma wakefield accelerator simulation code and the results are benchmarked against an existing code. The restoring force on the off‐centered beam due to the cloud’s space charge is studied. The force is stronger at the tail than it is at the head due to the cloud compression near the tail of the beam. The beam dynamics over 20Km of the SPS ring at CERN is studied and the head‐tail dephasing is observed.
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