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

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