High-Energy Bragg and Laue Monochromators for an APS Wiggler Beamline

The elliptical multipole wiggler located at Sector 11 of the Advanced Photon Source has a maximum critical energy of 32 keV and a total power output of ∼ 8 kW. The device produces circularly polarized X‐rays on‐axis and linearly polarized X‐rays above and below the ring plane. A double crystal monochromator intercepts the lower linearly polarized radiation to be used in the 11ID‐D experimental station for scattering and spectroscopy experiments in the 5 to 40 keV energy range. The on‐axis circularly polarized photons and upper linearly polarized photons are monochromatized by one crystal horizontally deflecting monochromators at fixed Bragg angles of θ = 3.8° and θ = 1.9° respectively. We will present here the designs and detail the performance of Laue and Bragg monochromator designs for these two beamlines which operate at fixed energies from ∼60 keV to 125 keV. For the high‐energy diffraction station, 11ID‐C, which utilizes the upper linearly polarized radiation, the Laue monochromator design allows rap...