• P. Lebrun, P. Spentzouris
  Fermilab, Batavia
• J.R. Cary
  CIPS, Boulder, Colorado
• P. Stolz, S.A. Veitzer
  Tech-X, Boulder, Colorado

Precision simulations of the electron cloud at the Fermilab Main Injector have been studied using the plasma simulation code VORPAL. Fully 3D and self consistent solutions that includes Yee-type E.M. field maps generated by the cloud and the proton bunches have been obtained, as well detailed distributions of the 6D phase space occupied by the electrons. We plan to include such maps in the ongoing simulation of the space charge effects in the Main Injector. Simulations of the response of retarded field analyzers and microwave transmission experiments are ongoing.

• J. Qiang, R.D. Ryne
  LBNL, Berkeley, California
• R. De Maria
  BNL, Upton, Long Island, New York
• A. Macridin, P. Spentzouris
  Fermilab, Batavia
• Y. Papaphilippou
  CERN, Geneva
• U. Wienands
  SLAC, Menlo Park, California

A new proton synchrotron, the PS2, is under design study to replace the the current proton synchrotron at CERN for the LHC upgrade. Nonlinear space charge effects could cause significant beam emittance growth and particle losses and limit the performance of the PS2. In this paper, we report on studies of the potential space-charge effects at the PS2 using three-dimensional self-consistent macroparticle tracking codes, IMPACT, MaryLie/IMPACT, and Synergia. We will present initial benchmark results among these codes. Effects of space-charge on the emittance growth, especially due to synchrotron coupling, and the aperture sizes will also be discussed.