It has been reported that transverse distribution shaping can help to further enhance the energy extraction efficiency in a terawatt, tapered X-ray free-electron laser. Thus, methods of creating and keeping almost uniform transverse distributed (UTD) beam within undulators are required. This study shows that a UTD electron beam can be generated within evenly distributed drift sections where undulators can be placed, by means of octupoles and particular optics. A concrete design is presented, and numerical simulations are done to verify the proposed method.
@article{arxiv.1504.06945,
title = {Generate Uniform Transverse Distributed Electron Beam along a Beam Line},
author = {Y. Jiao and X. Cui},
journal= {arXiv preprint arXiv:1504.06945},
year = {2015}
}
Comments
7 pages, 3 figures, submitted to Chinese Physics C