Specific features of two diffraction schemes for a widely divergent X-ray beam

Comparative Analysis of Two Diffraction Schemes for Widely Divergent Beam of X-Ray Radiation

“…Methods differ in the way of exciting the characteristic radiation and in creating a radiation point source. We have used two slightly different schemes for implementing the WDB diffraction using a standard radiation source: an X-ray tube with a linear focal spot [4,5]. In one of the schemes the X-ray radiation passes through the diaphragm (a cone-shaped hole with the diameter of 30-50 µm in the tantalum plate) and falls on the studied crystal.…”

“…On the photographic plate mounted behind the crystal, only the diffracted radiation falls. The primary (non-diffracted) radiation is captured by trap [4]. The diaphragm, the crystal and the photographic plate are placed in a small chamber, which rotates around the diaphragm axis during the exposure.…”