Low emittance, high brilliance relativistic electron beams from a laser-plasma accelerator

E. Brunetti, Richard Shanks, G. G. Manahan, M. R. Islam, B. Ersfeld, M. P. Anania, S. Cipiccia, R. C. Issac, G. Raj, G. Vieux, G. H. Welsh, S. M. Wiggins, D. A. Jaroszynski

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Abstract

Progress in laser wakefield accelerators indicates their suitability as a driver of compact free-electron lasers (FELs). High brightness is defined by the normalized transverse emittance, which should be less than 1 pi mm mrad for an x-ray FEL. We report high-resolution measurements of the emittance of 125 MeV, monoenergetic beams from a wakefield accelerator. An emittance as low as 1.1 +/- 0.1 pi mm mrad is measured using a pepper-pot mask. This sets an upper limit on the emittance, which is comparable with conventional linear accelerators. A peak transverse brightness of 5 x 10(15) Am-1 rad(-1) makes it suitable for compact XUV FELs.

Original languageEnglish
Article number215007
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number21
DOIs
Publication statusPublished - 19 Nov 2010

Keywords

  • wakefield accelerator
  • driven

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