• M. Micheler, G.A. Blair, G.E. Boorman, V. Karataev, K. Lekomtsev
  JAI, Egham, Surrey
• R. Corsini, A.E. Dabrowski, T. Lefèvre
  CERN, Geneva
• S. Molloy
  Royal Holloway, University of London, Surrey

A setup for the investigation of Coherent Diffraction Radiation (CDR) from a conducting screen as a tool for non-invasive longitudinal electron beam profile diagnostics has been designed and installed in the Combiner Ring Measurement (CRM) line of the CLIC Test Facility (CTF3, CERN). In this report the status of the monitor development and results on the interferometric measurements of CDR spectra are presented. The CDR signal correlation with an RF pickup and a streak camera is reported. The future plans for the system improvements are also discussed.