Seminars Archive

Running experience at SPARC Photoinjector

Abstract
The SPARC project foresees the realization of a high brightness photo-injector to produce a 150-200 MeV electron beam to drive a SASE-FEL in the visible light. As a first stage of the commissioning a complete characterization of the photoinjector was planned. The knowledge of the beam dynamics in the first meters from the gun is crucial to match the following linac and to laser with the FEL. For such detailed study of the emittance compensation process standard beam diagnostic were not sufficient. For this purpose a novel beam diagnostic, called emittance meter has been developed. The emittance meter allows to measure at different location along the beamline the evolution of important beam parameters such as beam sizes, energy spread and rms transverse emittances in a region where the space-charge effect dominate the electron dynamics. In this talk we report our commissioning experience and results, showing the peculiarities of the beam evolution just after the gun.