High-quality electron beams from a helical inverse free-electron laser accelerator

J. Duris (), P. Musumeci, M. Babzien, M. Fedurin, K. Kusche, R. K. Li, J. Moody, I. Pogorelsky, M. Polyanskiy, J. B. Rosenzweig, Y. Sakai, C. Swinson, E. Threlkeld, O. Williams and V. Yakimenko
Additional contact information
J. Duris: UCLA
P. Musumeci: UCLA
M. Babzien: Accelerator Test Facility, Brookhaven National Laboratory
M. Fedurin: Accelerator Test Facility, Brookhaven National Laboratory
K. Kusche: Accelerator Test Facility, Brookhaven National Laboratory
R. K. Li: UCLA
J. Moody: UCLA
I. Pogorelsky: Accelerator Test Facility, Brookhaven National Laboratory
M. Polyanskiy: Accelerator Test Facility, Brookhaven National Laboratory
J. B. Rosenzweig: UCLA
Y. Sakai: UCLA
C. Swinson: Accelerator Test Facility, Brookhaven National Laboratory
E. Threlkeld: UCLA
O. Williams: UCLA
V. Yakimenko: SLAC National Accelerator Laboratory

Nature Communications, 2014, vol. 5, issue 1, 1-7

Abstract: Abstract Compact, table-top sized accelerators are key to improving access to high-quality beams for use in industry, medicine and academic research. Among laser-based accelerating schemes, the inverse free-electron laser (IFEL) enjoys unique advantages. By using an undulator magnetic field in combination with a laser, GeV m−1 gradients may be sustained over metre-scale distances using laser intensities several orders of magnitude less than those used in laser wake-field accelerators. Here we show for the first time the capture and high-gradient acceleration of monoenergetic electron beams from a helical IFEL. Using a modest intensity (~1013 W cm−2) laser pulse and strongly tapered 0.5 m long undulator, we demonstrate >100 MV m−1 accelerating gradient, >50 MeV energy gain and excellent output beam quality. Our results pave the way towards compact, tunable GeV IFEL accelerators for applications such as driving soft X-ray free-electron lasers and producing γ-rays by inverse Compton scattering.

Date: 2014
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DOI: 10.1038/ncomms5928

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