Long-Working-Distance Kirkpatrick-Baez Mirrors for Hard X-ray Beamlines at SPring-8

We designed and installed two types of long‐working‐distance Kirkpatrick‐Baez (KB) mirrors and mirror manipulators, which were customized into each experiment for hard x‐ray undulator beamlines at SPring‐8. For the BL32XU RIKEN Targeted Proteins beamline, 400‐mm‐long KB focusing mirrors for a beam size of 1 μm with a 730‐mm‐long working distance were designed for carrying out the structural analysis of protein microcrystals. We realized a focusing beam size of 0.9×0.9 μm2 (FWHM) and a focusing intensity of 6×1010 (photons/s) at an x‐ray energy of 12.4 keV. For the BL19LXU RIKEN SR Physics beamline, we developed KB mirrors for 100‐nm focusing with a 100‐mm‐working distance for the purpose of nano‐focus x‐ray diffraction. A focusing beam size of 100×100 nm2 (FWHM) and a high focusing intensity of 3.7×1010 (photons/s) at an x‐ray energy of 12.4 keV were realized.