Beam extraction with using volume reflection effect in crystals

The new possibility of slow beam extraction from circular accelerators using the effect of volume reflection is presented in this work. The analytical and computation calculations show that efficiency of such extraction for UNK1 may achieve ~95% for two techniques differing by various orientations of the nuclear planes with respect to the beam. Unlike traditional extraction with the help of channeling effect it is not so critical for angle alignment, thermal overloading, availability of perfection of crystal lattice and surface