Demonstration of cascaded modulator-chicane micro-bunching of a relativistic electron beam
Abstract
We present results of an experiment showing the first successful demonstration of a cascaded micro-bunching scheme. Two modulator-chicane pre-bunchers arranged in series and a high power mid-IR laser seed are used to modulate a 52 MeV electron beam into a train of sharp microbunches phase-locked to the external drive laser. This configuration allows to increase the fraction of electrons trapped in a strongly tapered inverse free electron laser (IFEL) undulator to 96\%, with up to 78\% of the particles accelerated to the final design energy yielding a significant improvement compared to the classical single buncher scheme. These results represent a critical advance in laser-based longitudinal phase space manipulations and find application both in high gradient advanced acceleration as well as in high peak and average power coherent radiation sources.
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Cite
@article{arxiv.1708.05456,
title = {Demonstration of cascaded modulator-chicane micro-bunching of a relativistic electron beam},
author = {N. Sudar and P. Musumeci and I. Gadjev and Y. Sakai and S. Fabbri and M. Polyanskiy and I. Pogorelsky and M. Fedurin and C. Swinson and K. Kusche and M. Babzien and M. Palmer},
journal= {arXiv preprint arXiv:1708.05456},
year = {2018}
}