The Investigations Of Beam Extraction And Collimation At U-70 Proton   Synchrotron Of IHEP By Using Short Silicon Crystals
  The new results of using short (2-4mm) bent crystals for extraction and collimation of proton beam at IHEP 70 Gev proton synchrotron are reported. A broad range of energies from 6 to 65 GeV has been studied in the same crystal collimation set-up. The efficiency of extraction more than 85% and intensity more than 10E12 were obtained by using crystal with the length 2-mm and the angle 1 mrad. The new regime of extraction is applied now at the accelerator to deliver the beam for different experimental setups within the range of intensity 10E7-10E12ppp. 
A. G. Afonine, V. T. Baranov, V. M. Biryukov, V. N. Chepegin, Y. A.   Chesnokov, Y. S. Fedotov, V. I. Kotov, V. A. Maisheev,...