BEAM SLICE CHARACTERIZATION AT SPARC HIGH BRIGHTNESSPHOTOINJECTOR

The SPARC photoinjector drives a SASE FEL to perform several experiments both for the production of high brightness electron beam and for testing new scheme of SASE radiation generation. The control of the beam properties, in particular at the level of the slice dimension, is crucial in order to optimize the FEL process. We report some preliminary results concerning slice emittance and slice energy spread measurements. A comparison with PARMELA simulation is also given