Development of high energy resolution crystal analyzer based on microporous ceramics for resonant inelastic X-ray scattering program at HEPS

Abstract

The spherically bent X-ray crystal analyzer (SBCA) is one of the key optical elements for performing high energy resolution hard X-ray spectroscopies based on Rowland circle geometry. To meet the requirements of Resonant Inelastic X-ray Scattering (RIXS) program at High Energy Photon Source (HEPS), the fourth-generation high energy synchrotron in Beijing, China, high energy resolution crystal analyzers were fabricated. The fabrication processes of vacuum-mounted flat-diced crystal analyzers using home-designed devices with microporous ceramics are presented. The energy resolution of the vacuum-mounted crystal analyzers, for measuring Cu K-edge and Re L3-edge RIXS, are bench marked with that of the glued flat-diced crystal analyzers. The gluing and vacuum-mounted analyzers are proven to be reliable techniques for the routine production of spherical bent diced crystal analyzers with energy resolution in the order of tens of milli-electron volts, and with good focal properties and efficiency. In particular, the vacuum-mounted technique will be beneficial for the RIXS techniques to target element of interests.journal articl