TUNABLE X-RAY SOURCE BASED ON MOSAIC CRYSTALS USING FOR MEDICINE APPLICATIONS

The prospect of creation of the X-ray source with tunable wavelength on tl»> base of a middle energy accelerator and mosaic crystals are analyzed. It i» proved, that due to the contribution of diffracted bremsstrahlung, the mo»air crystals provide the essentially greater yield of hard radiation (oj > 20 keV), than perfect crystals. It is shown, that using a traditional scheme with one crystal for X-ray generation isn’t acceptable for medicine applications. Doublicrystal scheme is offered and analyzed, in which one crystal is located on the electrons beam, and another is used for monochromatization and parallel mov­ ing of the X-ray beam. It provides suppression of background bremsstrahlung, and there is no need to move the object when change the photons energy.