TEXS: in-vacuum tender X-ray emission spectrometer with 11 Johansson crystal analyzers

The design and first results of a large-solid-angle X-ray emission spectrometer that is optimized for energies between 1.5   keV and 5.5   keV are presented. The spectrometer is based on an array of 11 cylindrically bent Johansson crystal analyzers arranged in a non-dispersive Rowland circle geometry. The smallest achievable energy bandwidth is smaller than the core hole lifetime broadening of the absorption edges in this energy range. Energy scanning is achieved using an innovative design, maintaining the Rowland circle conditions for all crystals with only four motor motions. The entire spectrometer is encased in a high-vacuum chamber that allocates a liquid helium cryostat and provides sufficient space for in situ cells and operando catalysis reactors.

Source: Journal of Synchrotron Radiation - April 6, 2020 Category: Physics Authors: Rovezzi, M. Harris, A. Detlefs, B. Bohdan, T. Svyazhin, A. Santambrogio, A. Degler, D. Baran, R. Reynier, B. Noguera Crespo, P. Heyman, C. Van Der Kleij, H.-P. Van Vaerenbergh, P. Marion, P. Vitoux, H. Lapras, C. Verbeni, R. Kocsis, M.M. Manceau, A. Glatz Tags: X-ray instrumentation wavelength dispersive spectrometer X-ray optics tender X-rays Johansson crystal analyzers beamlines Source Type: research