PINK: a tender X-ray beamline for X-ray emission spectroscopy

A high-flux beamline optimized for non-resonant X-ray emission spectroscopy (XES) in the tender X-ray energy range has been constructed at the BESSY II synchrotron source. The beamline utilizes a cryogenically cooled undulator that provides X-rays over the energy range 2.1   keV to 9.5   keV. This energy range provides access to XES [and in the future X-ray absorption spectroscopy (XAS)] studies of transition metals ranging from Ti to Cu (K α ,   K β lines) and Zr to Ag (L α ,   L β ), as well as light elements including P, S, Cl, K and Ca (K α ,   K β ). The beamline can be operated in two modes. In PINK mode, a multilayer monochromator (E/ Δ E ≃ 30 – 80) provides a high photon flux (1014   photons   s − 1 at 6   keV and 300   mA ring current), allowing non-resonant XES measurements of dilute substances. This mode is currently available for general user operation. X-ray absorption near-edge structure and resonant XAS techniques will be available after the second stage of the PINK commissioning, when a high monochromatic mode (E/ Δ E ≃ 10000 – 40000) will be facilitated by a double-crystal monochromator. At present, the beamline incorporates two von Hamos spectrometers, enabling time-resolved XES experiments with time scales down to 0.1   s and the possibility of two-color XES experiments. This paper describes the optical scheme of the PINK beamline and the endstation. The design of the two von Hamos dispersive spectrometers and sample en...
Source: Journal of Synchrotron Radiation - Category: Physics Authors: Tags: X-ray emission spectroscopy von Hamos dispersive spectrometers tender X-rays catalysis synchrotron beamlines Source Type: research