Demonstration of nonlinear-energy-spread compensation in relativistic electron bunches with corrugated structures
Abstract
High quality electron beams with flat distributions in both energy and current are critical for many accelerator-based scientific facilities such as free-electron lasers and MeV ultrafast electron diffraction and microscopes. In this Letter we report on using corrugated structures to compensate for the beam nonlinear energy chirp imprinted by the curvature of the radio-frequency field, leading to a significant reduction in beam energy spread. By using a pair of corrugated structures with orthogonal orientations, we show that the quadrupole wake fields which otherwise increase beam emittance can be effectively canceled. This work also extends the applications of corrugated structures to the low beam charge (a few pC) and low beam energy (a few MeV) regime and may have a strong impact in many accelerator-based facilities.
Keywords
Cite
@article{arxiv.1503.06892,
title = {Demonstration of nonlinear-energy-spread compensation in relativistic electron bunches with corrugated structures},
author = {Feichao Fu and Rui Wang and Pengfei Zhu and Lingrong Zhao and Tao Jiang and Chao Lu and Shengguang Liu and Libin Shi and Lixin Yan and Haixiao Deng and Chao Feng and Qiang Gu and Dazhang Huang and Bo Liu and Dong Wang and Xingtao Wang and Meng Zhang and Zhentang Zhao and Gennady Stupakov and Dao Xiang and Jie Zhang},
journal= {arXiv preprint arXiv:1503.06892},
year = {2015}
}
Comments
5 pages, 5 figures