  The results of numerical simulation of the channeling of ultra-relativistic
270 MeV electrons and positrons in a diamond crystal are presented. Using the
MBN Explorer package, the trajectories of the have been determined of the
particles incident on a 20 microns thick crystal along (110) crystallographic
plane. The channeling parameters and radiation spectra of electrons and
positrons have been computed for the cases of straight and periodically bent
diamond crystals.
