Simulations and Experiments of Beam - Beam Effects in e + e − Storage Rings ∗

Over the past decade, extensive simulations of beam-beam effects in e+e− colliders, based on the particle-in-cell method, were developed to explain many complex experimental observations. Recently, such simulations were used to predict the future luminosity performance of e+e− colliders. Some predictions have been proven to be correct in the existing accelerators. In this paper, many effects such as the beam-beam limit, crossing angle, parasitic collisions, betatron spectrum, and the beam-beam lifetime, will be directly compared between simulations and experiments. (Invited talk presented at 2005 Particle Accelerator Conference, May 16-20, 2005, Knoxville, TN, USA) ∗Work in part supported by the Department of Energy under Contract No. DE-AC02-76SF00515. SIMULATIONS AND EXPERIMENTS OF BEAM-BEAM EFFECTS IN e+e− STORAGE RINGS ∗ Y. Cai† , J. Seeman, SLAC, Menlo Park, CA 94025, USA W. Kozanecki, CEA/DSM/DAPNIA, Gif-sur-Yvette, France K. Ohmi, M. Tawada, KEK, 1-1 Oho, Tsukuba, 305-0801, Japan