7 May 2009 Pepper-pot emittance measurement of laser-plasma wakefield accelerated electrons
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Abstract
The transverse emittance is an important parameter governing the brightness of an electron beam. Here we present the first pepper-pot measurement of the transverse emittance for a mono-energetic electron beam from a laser-plasma wakefield accelerator, carried out on the Advanced Laser-Plasma High Energy Accelerators towards X-Rays (ALPHA-X) beam line. Mono-energetic electrons are passed through an array of 52 μm diameter holes in a tungsten mask. The pepper-pot results set an upper limit for the normalised emittance at 5.5 ± 1 π mm mrad for an 82 MeV beam.
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R. P. Shanks, R. P. Shanks, M. P. Anania, M. P. Anania, E. Brunetti, E. Brunetti, S. Cipiccia, S. Cipiccia, B. Ersfeld, B. Ersfeld, J. G. Gallacher, J. G. Gallacher, R. C. Issac, R. C. Issac, M. R. Islam, M. R. Islam, G. Vieux, G. Vieux, G. H. Welsh, G. H. Welsh, S. M. Wiggins, S. M. Wiggins, D. A. Jaroszynski, D. A. Jaroszynski, "Pepper-pot emittance measurement of laser-plasma wakefield accelerated electrons", Proc. SPIE 7359, Harnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond, 735907 (7 May 2009); doi: 10.1117/12.820706; https://doi.org/10.1117/12.820706
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