Channeling and radiation of electrons and positrons in the diamond heterocrystals

Theoretical physics

We analyze numerically the radiative and channeling properties of ultra-relativistic electrons and positrons propagating through a periodically bent diamond crystal grown on a straight single-crystal diamond substrate. Such systems are called heterocrystals being one of the experimentally realized specimens for the implementation of crystalline undulators. We state that in such systems the channeling and radiative properties of projectiles are sensitive to the projectiles' energy and to the beam propagation direction, e. g., to the beam-to-crystal site of entry: from the side of substrate or from that of periodically bent crystal. The results obtained are important for designing and practicing the new crystalline undulators.