DIFFRACTION RADIATION AS A DIAGNOSTICS TOOL AT FLASH

摘要

Diffraction Radiation is receiving ever more consideration as a non-intercepting diagnostic tool. On the superconducting linac at FLASH diagnostic instruments based on DR. are routinely used, and new developments are continuously experimented. The analysis of the coherent part of DR spectrum allows the measurement of the longitudinal charge distribution in the bunch, while the incoherent emission at optical wavelengths can give information on the transverse beam size. In this last case the interference effects that are at the basis of the Optical Diffraction Radiation angular distribution must be properly taken into account.