Study of crystal extraction of a circulating beam from the U-70 at the injection energy

Abstract

Phenomenon of the deflection of charged particle beam due to channeling in a bent crystal is good investigated and successfully applied for extraction of the beam in high-energy accelerators, at the energies of about 10GeV and higher. However, a significant practical interest presents the problem of deflection and extraction of charged particles with energies below 1GeV, for example, production of ultrastable beams of low emittance for medical and biological applications. That’s why two novel crystal techniques, namely: thin sequential straight crystal targets, and array of short bent crystal strips were investigated in this report as elements for extraction of the beam from U-70 accelerator. Experimental results were obtained for extraction of 1.3GeV protons.