Optical Transition Radiation Measurement of Electron Beam for Beijing Free Electron Laser

We used transition radiation techniques instead of the original phosphor targets to improve the electronic beam diagnostic system at Beijing Free Electron Laser. The beam profile, size (3.3×2.4mm), position and divergence angle (σ_rms=2.5mrad) in transverse have been obtained from optical transition radiation. We also present the experimental set-up and some preliminary results.