Diamond Double‐Crystal Monochromator for SPring‐8 Undulator Beamlines

Diamond (111) double‐crystal monochromators with indirect water cooling are tested at undulator beamlines of SPring‐8. A crystal mounting method and an alignment procedure have been developed for simple and reliable installation. From the quantitative evaluation of the performance, it was found that the cooling capability is sufficient even for an incident power of 370 W (power density of 450 W/mm2). The measured photon flux was nearly equal to the theoretical value.