Operation of the Super-ACO free electron laser with a feedback damping quadrupolar coherent synchrotron oscillation

Up to now, the operation of the Super-ACO storage ring Free Electron Laser (FEL) at high current still represented a challenge due to the presence of the quadrupolar coherent synchrotron oscillations. So, a feedback damping them has been installed on the storage ring. As a consequence, beam parameters and FEL performances have been measured.