Speaker
Description
Multilayer monochromators are commonly employed in photon hungry synchrotron beamlines to deliver intense, monochromatic X-ray beams. We present the design, validation, and beamline integration of a high-stability, high energy (20-70keV) double multilayer monochromator developed for the Structural Dynamics Beamline (SDB) at HEPS. The system features a novel flexure-based architecture, optimized via finite element analysis (FEA), to significantly enhance stiffness, particularly in the roll direction of the Bragg axis. A monolithic flexure mechanism is employed for pitch and gap adjustment of the second multilayer, improving mechanical integrity and stability. A special gravity-driven water cooling system, coupled with a unique indium-gallium interface for clamping and thermal contact, was developed to suppress vibrational disturbances. FEA simulations and experimental validation confirmed a clamping-induced deformation below 69 nrad RMS. A vibration level as low as 5 nrad under cooling was measured by laser interferometry. The system has been successfully installed and tested with synchrotron beam, meeting requirements of the beamline.
Funding Agency
National Development and Reform Commission (NDRC)
