A method of significantly reducing wakefields generated at collimators is proposed, in which the path of a beam is slightly bent before collimation. This is applicable for short bunches and can reduce the wakefields by a factor of around 7 for present day free electron lasers and future colliders.
@article{arxiv.1108.4625,
title = {Bending a Beam to Significantly Reduce Wakefields of Short Bunches},
author = {Jonathan Gratus and Michael R. Ferris},
journal= {arXiv preprint arXiv:1108.4625},
year = {2011}
}