LINAC

The stringent constraints on the electron beam parameters required by FERMI, such as emittance, pulse to pulse energy and current stability, as well as arrival time of the bunch at the input of the undulator chain, impose very stringent requirements on the parameters and operating conditions of the Linac accelerating sections. To address the problem, i.e. evaluating the operating conditions of the machine and the flexibility of the adopted layout, beam dynamics studies with the LiTrack code [1] have been performed. Here the results of different Linac settings as well as the allowed variations of the phase and amplitude of the accelerating RF field are presented and discussed