Electron beam analysis and sensitivity studies for the EuPRAXIA@SPARC_LAB RF injector

Author:

Giribono A,Alesini D,Bacci A,Bellaveglia M,Cardelli F,Chiadroni E,Del Dotto A,Faillace L,Ferrario M,Gallo A,Ghigo A,Giannetti G,Mostacci A,Opromolla M,Petrillo V,Piersanti L,Pompili R,Romeo S,Rossetti Conti M,Rossi A R,Shpakov V,Silvi G J,Vaccarezza C

Abstract

Abstract The interest in plasma-based accelerators as drivers of user facilities is growing worldwide thanks to their compactness and reduced costs. The EuPRAXIA@SPARC_LAB collaboration is preparing a technical design report for a multi-GeV plasma-based accelerator with outstanding electron beam quality to pilot an X-ray FEL, the most demanding in terms of beam brightness. The beam dynamics has been studied aiming to a reliable operation of the RF injector to generate a so-called comb-beam with 500 MeV energy suitable as driver of the Beam-driven Plasma Wakefield Accelerator. A case of interest is the generation of a trailing bunch with 1 GeV energy, less than 1 mm-mrad transverse emittance and up to 2 kA peak current at the undulator entrance. The comb-beam is generated through the velocity bunching technique, an RF compression tool that enables high brightness beams within relatively compact machine. Since it is based on a rotation of the beam phase space inside the external RF fields, it could be particularly sensitive to amplitude and phase jitters in the RF injector. The electron beam dynamics and the machine sensitivity to the possible jitters are presented in terms of effect on the beam quality so to provide the basis for the jitter tolerances.

Publisher

IOP Publishing

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