Wakefields have a considerable effect on beam dynamics and they must not be neglected for emittance growth studies, background estimates and other problems. The codes used for these problems are normally not capable of self-consistent wakefield calculations. They should thus be extended with either analytical models or export the wakefields numerically evaluated with other codes (such as GdfidL[1]) when analytical models are not feasible. Both approaches are presented as well as their implementation in PLACET[2], MERLIN[3] and BDSIM[4]. The simulation results for the ILC and CLIC beam delivery systems are given as an example. Results produced with different codes are compared.
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