Novel adaptive directly water-cooled monochromator crystal for high heat load wiggler beamlines

Abstract

The performance of large area directly cooled monochromator crystals at high-power wiggler beamlines is degraded by the heat load from insertion devices and by the pressure of the cooling agent. Based on the experience gained with directly water-cooled crystals at HASYLAB, a new adaptive crystal with remotely controlled crystal bender was built. A characterization of the first new Si(111) crystal under different heat load conditions up to 850 W is presented.