We report observation of a strong wakefield induced energy modulation in an energy-chirped electron bunch passing through a dielectric-lined waveguide. This modulation can be effectively converted into a spatial modulation forming micro-bunches with a periodicity of 0.5 - 1 picosecond, hence capable of driving coherent THz radiation. The experimental results agree well with theoretical predictions.
@article{arxiv.1111.7291,
title = {Experimental Observation of Energy Modulation in Electron Beams Passing Through Terahertz Dielectric Wakefield Structures},
author = {S. Antipov and C. Jing and M. Fedurin and W. Gai and A. Kanareykin and K. Kusche and P. Schoessow and V. Yakimenko and A. Zholents},
journal= {arXiv preprint arXiv:1111.7291},
year = {2015}
}
Comments
v3. Reviewers' suggestions incorporated. Accepted by PRL