High resolution, single shot emittance measurement of relativistic electrons from laser-driven accelerator

G. G. Manahan; E. Brunetti; R. P. Shanks; 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

doi:10.1117/12.887175

11 May 2011 High resolution, single shot emittance measurement of relativistic electrons from laser-driven accelerator

G. G. Manahan, E. Brunetti, R. P. Shanks, 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

Author Affiliations +

Proceedings Volume 8079, Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles; 807909 (2011) https://doi.org/10.1117/12.887175
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

The normalised transverse emittance is a measure of the quality of an electron beam from a particle accelerator. The brightness, parallelism and focusability are all functions of the emittance. Here we present a high-resolution single shot method of measuring the transverse emittance of a 125 ± 3 MeV electron beam generated from a laser wakefield accelerator (LWFA) using a pepper-pot mask. An average normalised emittance of εrms,x,y = 2.2 ± 0.7, 2.3 ± 0.6 π-mmmrad was measured, which is comparable to that of a conventional linear accelerator. The best measured emittance was εrms,x,=1.1 ± 0.1 π-mm-mrad, corresponding to the resolution limit of our system. The low emittance indicates that this accelerator is suitable for driving a compact free electron laser.

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G. G. Manahan, E. Brunetti, R. P. Shanks, M. R. Islam, B. Ersfeld, M. P. Anania, S. Cipiccia, R. C. Issac, G. Raj, G. Vieux, G. H. Welsh, S. M. Wiggins, and D. A. Jaroszynski "High resolution, single shot emittance measurement of relativistic electrons from laser-driven accelerator", Proc. SPIE 8079, Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles, 807909 (11 May 2011); https://doi.org/10.1117/12.887175

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