Diffraction Radiation as ultra-high intensity electron beams non-intercepting diagnostics

Diffraction Radiation is receiving ever more consideration as a nonintercepting 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