Radiation and spin separation of high energy positrons channeled in bent crystals

The dynamics, radiation and possibilities of the radiation spin separation of positron channeling in bent crystals are studied. It is shown that the channeling of ultrahigh energy positrons both in bent and straight (normal) crystals can serve as an effective source of hard photons. The radiative separation of particles depending on spin orientation with respect to the plane of motion and the radiative polarization can make it possible to obtain, by means of bent crystals, a positron beam with a degree of polarization about 10 to 20%.