Specifications of the Distributed Timing System for the CLIC Main Linac

The longitudinal phase stability of the CLIC main and drive beams is a crucial element of the CLIC design. In order to measure and control the phase a distributed phase monitoring system has been proposed. The system measures the beam phase every 900 m. The relative phase between the measurement points is synchronized with an external reference system via a chain of reference lines. This paper presents the simulations of error propagation in the proposed distributed monitoring system and the impact on the drive and main beam phase errors and the luminosity. Based on the results the error tolerances for the proposed system are detailed.