X-RAY GENERATION PRODUCED BY RELATIVISTIC ELECTRONS IN COMPOUND MULTIFOIL STRUCTURE PLUS CRYSTAL TARGETS

Novel concepts of X-ray production by relativistic electrons in strati fied targets are developed. It is shown that by transmitting an electr on beam through a compound target, consisting of a periodic multifoil structure and a crystal, it is possible to obtain the intense, tunable , quasi-monochromatic X-rays, emitting at large (Bragg) angles with re spect to the electron beam axis due to the diffraction on the crystal of resonance transition radiation, previously generated in the multila yered structure. The first results of experimental investigation of th is effect for 900 MeV electrons, transmitting through the periodic sta ck of 10 Mylar foils and pyrolytic graphite crystal, are presented. Th e obtained results show that, by using of the combined radiator, it is possible to produce much more intense X-rays than parametric X-ray ra diation, emitting by relativistic electrons due to the diffraction of virtual photons of electron eigenfield during the electron passage thr ough the crystal.