Effect of Acoustic Wave on the Parametric X-ray Generation by Relativistic Electrons in a Crystal

Abstract—An exhaustive description of the parametric X-ray (PXR) generation by relativistic electrons in a crystal excited by an acoustic wave is proposed. A principal question as to whether it is possible to enhance the PXR yield under these conditions is considered. Increasing interest in the analysis of high-energy electromagnetic processes in oriented crystals under the action of external factors (e.g., acoustic waves) is related to the possibility of controlling these processes. In particular, the effect of acoustic waves was studied with respect to the coherent bremsstrahlung radiation [ 1, 2], coherent electron—positron pair production in a crystal [3, 4], diffraction of free photons [5, 6], X-ray transition radiation [7], and parametric X-ray (PXR) generation [8—13]. Our previous experimental investigations [12, 13] showed an increase in the PXR yield with the acousti