The PEARL project aims at advancing the technologies for manufacturing of high quality Periodically Bent Crystals (PBCr). The PBCr developed in the course of this project will be utilised for the construction of novel light sources of high-energy (hν≥102 keV up to GeV range) monochromatic electromagnetic radiation by means of a Crystalline Undulator (CU) [1]. The technological and experimental par ...