A Comparative Study for the Clic Drive Beam Decelerator Optics

The baseline for the CLIC drive beam decelerator optics consists of a 2 m long FODO cell. This solution was adopted to have strong focusing in order to mitigate the effect of the PETS wake fields and to minimize the drive beam envelope. Taking into account the most recent PETS design, we compare the performance of the baseline FODO cell with a proposal that consider twice longer FODO cell. Despite of the expected cost in terms of performance, the reduction of the complexity of the system due to the halving of the number of quadrupoles can be beneficial for the overall optimization of the decelerator design.