Conference paper Open Access

Laser comb: simulations of pre-modulated e- beams at the photocathode of a high brightness rf photoinjector

Boscolo, Manuela

A density modulated electron beam generated at the photocathode of a radio-frequency electron gun evolves within an accelerator towards a homogenous beam but with an energy modulation. The density modulation is changed into energy modulation. This energy distribution can be exploited to restore the initial density profile, called comb beam, with a proper rf phase of the accelerating cavities and by adding a proper compressor. The comb beam at the cathode is generated driving the photocathode by the relative laser pulse train. This laser pulse is obtained with a shaping device inserted into the laser system. The dynamics is studied within the SPARC system with the PARMELA code.

Conf.Proc.C 060626 (2006) 98-100
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