Calculations of intensity of radiation in crystal undulator

The calculations of the intensity of radiation in the crystal undulator for the conditions close to ones, which take place for IHEP undulator experiment, were carried out. Motion of positrons in the crystal undulator represents a superposition of the two types of motion: quasiperiodic motion between groves of the undulator and the similar motion in the channeling regime. Our calculations take into account the influence of the channeling motion on the intensity of the undulator radiation. The both parameters, characterizing the each type of motion, are larger then 1. The obtained results will be used for the comparison with the experimental data.