Pepper-pot emittance measurement of laser-plasma wakefield accelerated electrons
- Shanks, R.P.
- Anania, M.P.
- Brunetti, E.
- Cipiccia, S.
- Ersfeld, B.
- Gallacher, J.G.
- Issac, R.C.
- Islam, M.R.
- Vieux, G.
- Welsh, G.H.
- Wiggins, S.M.
- Jaroszynski, D.A.
DOIAbstract
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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