WAKEFIELD CALCULATION- COMPARISON BETWEEN SIMULATION AND EXPERIMENTAL DATA∗

In linear colliders the collimator wakefields have a sig-nificant effect on emittance growth, beam jitter and back-ground estimates. Each simulation code models the colli-mator wakefields using a different approach and a discus-sion of the formalism for incorporating wakefields into the particle tracking code Merlin is included in this paper. Us-ing simple collimator types we present the different pre-dictions for bunch shape effects, and also for the wakefield kicks. These kicks are also compared with experimental results from SLAC End Station A (ESA)