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BM23 - XAS Beamline

Synopsis

BM23 is a bending magnet beamline optimized for standard EXAFS in a large energy range (5-75 keV), oriented towards high-quality data collection, stability and versatility, high automation, online data analysis and flexible sample environments.
Status:  open

Disciplines

  • Physics
  • Chemistry
  • Materials and Engineering
  • Environmental Sciences
  • Earth and Planetary Sciences

Applications

  • Chemistry
  • Catalysis
  • Solid state physics
  • Materials science
  • Biophysics
  • Environmental science
  • Earth and planetary science
  • Cultural heritage

Techniques

  • EXAFS - extended X-ray absorption fine structure
  • MicroXANES - micro X-ray absorption near-edge structure
  • XAFS - X-ray absorption fine structure
  • XANES - X-ray absorption near-edge structure
  • XMLD - X-ray magnetic linear dichroism
  • XRD - X-ray diffraction
  • XRF - X-ray fluorescence

Energy range

  • 5.0 - 75.0  keV

Beam size

  • Minimum (H x V) : 3.0 x 3.0  µm²
  • Maximum (H x V) : 13.0 x 1.0  mm²

Sample environments

  • Plug flow reactor (T ~ 1000K) coupled to downstream MS
  • Simultaneous IR and MS measurements
  • Multi-sample holder (16 pellets of 5 mm diameter) under controlled atmosphere
  • Liquid He cryostat (4-300K) - pellets
  • Controlled atmosphere oven (300-1300 K) - for 5 mm diameter pellets
  • Online microscope setup in backscattering geometry for microXRF measurements on large samples
  • Diamond Anvil Cells (up to 150 GPa combinable with cryo-cooling (5K) or resistive heating (1500 K)) combinable with a PRL, XRD, XRF
  • Paris Edinburgh large volume press (17 GPa, 2000K) combinable with XRD and XRF

Detectors

  • Ionization chambers
  • XRF detectors: Si drift detectors ( 1 mm and 2 mm chip thickness for low and high energy detection) coupled to FalconX electronics (offering a high saturation level at 1 Million counts) and combinable with a polycapillary for microXRF measurements in the DAC
  • Mass spectrometer
  • Drifts spectrometer
  • Infrared spectrometer
  • Online microscope for sample position visualization¬†
  • XRD detector: Pilatus 1M (angle-resolved XRD detector for specific applications)
  • A PRL system¬† for online pressure determination in the DAC

Technical details