A grid-type semitransparent X-ray monochromator

A grid-type semitransparent X-ray monochromator is described. It can be use d for splitting polychromatic beams, mixing beams of different spectral com positions, and radiation intensity monitoring. The monochromator is manufac tured from a Si single crystal and contains a set of periodically spaced sl it openings oriented in parallel to the diffraction plane. The data of refl ectivity and transparency measurements obtained by scanning the diaphragm p erpendicular to the measurement plane are presented and compared with the r esults of computer simulation.