Observation of parametric X-ray radiation for the asymmetric Laue geometry

Use of parametric X-ray radiation of electrons in crystals to determine the parameters of imaging-plates

“…Studies of the parameters for the plates were carried out for the (111) reflection plane and for a 0.5 m distance between the crystal and the detector to reduce absorption in the air and increase the intensity of the recorded radiation. In addition, we analyzed the measurement results presented in previous works [5,15,16] and those obtained using the IPU-type IP.…”

“…The details of the experimental setup are described elsewhere [5,16]. The Si crystal was mounted onto a two-dimensional goniometer in a vacuum chamber.…”

“…Figure 4b shows the results of a comparison of the measured and fitted dependences for the ( 11 1) and (110) reflection planes for a distance between the crystal and the IP plate of 1 m. For both reflection planes, good agreement is observed between the measured and fitted dependences. The difference in radiation intensity for the (111) and ( 11 1) reflection planes (figures 4a and 4b) is attributable to the difference in electron path length in the crystal [16], the absorption of radiation in the air, and different distances between the crystal and plate.…”

“…The values of photo-stimulated emission yields 𝜒 IP ( ω𝑖 ) per photon, obtained by fitting the measurement results and calculating vertical angular distributions for the reflecting plane (111), are given in table 1 for all studied plates. The values of 𝜒 IPU ( ω𝑖 ) for an IPU plate and all previously studied crystal orientations [5,15,16] are also presented here. Errors are statistical and do not include normalization and calculation model errors.…”

A proof-of-principle experiment on a new diagnostic tool for determining beam sizes from angular distributions of parametric X-ray radiation

“…The background conditions depend on the operating mode of the accelerator, the location of the detector, and the crystal orientation angle [26]. To determine the angular distribution of the background for each of the distances, the crystal was misoriented by ±3 • from the Bragg angle.…”