An electron beam generated in a radio-frequency photo-injector illuminated by a laser “comb” pulse evolves towards a homogenous electron beam with an energy modulation. The density modulation in fact is transformed into an energy modulation, with a saw-tooth like shape, by the longitudinal space charge forces. Such an energy distribution can be exploited to restore the initial density profile by means of a RF accelerating structure operating in the velocity bunching mode. It results a train of short electron bunches suitable for advanced PWFA experiments. The initial laser comb can be obtained with a pulse shaping device inserted into the laser system. In this paper we discuss the beam dynamics features of such a beam.
A train of micro-bunches for PWFA experiments produced by RF photoinjectors / M. Boscolo, M. Ferrario, C. Vaccarezza, I. Boscolo, F. Castelli, S. Cialdi. - In: INTERNATIONAL JOURNAL OF MODERN PHYSICS B. - ISSN 0217-9792. - 21:3-4(2007), pp. 415-421.
A train of micro-bunches for PWFA experiments produced by RF photoinjectors
I. Boscolo;F. CastelliPenultimo
;S. CialdiUltimo
2007
Abstract
An electron beam generated in a radio-frequency photo-injector illuminated by a laser “comb” pulse evolves towards a homogenous electron beam with an energy modulation. The density modulation in fact is transformed into an energy modulation, with a saw-tooth like shape, by the longitudinal space charge forces. Such an energy distribution can be exploited to restore the initial density profile by means of a RF accelerating structure operating in the velocity bunching mode. It results a train of short electron bunches suitable for advanced PWFA experiments. The initial laser comb can be obtained with a pulse shaping device inserted into the laser system. In this paper we discuss the beam dynamics features of such a beam.Pubblicazioni consigliate
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