High efficiency energy extraction from a relativistic electron beam in a strongly tapered undulator

Abstract

We present results of an experiment where, using a 200 GW CO2 laser seed, a 65 MeV electron beam was decelerated down to 35 MeV in a 54 cm long strongly tapered helical magnetic undulator, extracting over 30$\%$ of the initial electron beam energy to coherent radiation. These results demonstrate unparalleled electro-optical conversion efficiencies for a relativistic beam in an undulator field and represent an important step in the development of high peak and average power coherent radiation sources.

arXiv comment5 pages, 6 figures

References in corpus (3)

• Femtosecond Diffractive Imaging with a Soft-X-ray Free-Electron Laser
• High Efficiency, Multi-Terawatt X-ray free electron lasers
• Extreme Ultraviolet (EUV) Sources for Lithography based on Synchrotron Radiation

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