TOWARDS AN ULTRA-STABLE REFERENCE DISTRIBUTION FOR THE NEW PSI 250 MeV INJECTOR

The PSI 250 MeV Injector, a precursor to the SwissFEL, with its extreme jitter and stability demands poses new challenges for the synchronization system. Our concept is double-tracked: low risk electrical and best potential performance and flexibility optical. The electrical distribution system, being established first, relies on reliable technology. Optimized to achieve a benchmark jitter performance of around 10 fs and a long term drift stability of some 10 fs in the most critical parts of the machine it will also backup the optical system. Sub 10 fs jitter and drift figures are being aspired for the latter. In this contribution, both system designs are presented, expected and first measured electrical and optical reference signal jitter and long term cable and coupler drifts are presented. A cable temperature stabilization system is discussed, too. Finally, a first jitter measurement of the optical master oscillator (OMO) laser will be presented.