BM16

Synopsis

FAME-UHD, the French Absorption spectroscopy beamline in Material and Environmental sciences at Ultra-High Dilution, is dedicated to high energy resolution fluorescence detected x-ray absorption spectroscopy (HERFD-XAS) for structural investigation of ultra-diluted samples. The key element of the beamline is thus a crystal analyser spectrometer, which enables XANES analyses at concentrations as low as 1ppm and EXAFS at 10ppm.
Status:  open

Disciplines

  • Environmental Sciences
  • Earth and Planetary Sciences
  • Chemistry
  • Life Sciences
  • Physics
  • Materials and Engineering
  • Cultural Heritage

Techniques

  • EXAFS - extended X-ray absorption fine structure
  • XAS - X-ray absorption spectroscopy
  • XANES - X-ray absorption near-edge structure
  • XAFS - X-ray absorption fine structure
  • XRF - X-ray fluorescence
  • XES - X-ray emission spectroscopy

Energy range

  • 4.8 - 20.0  keV

Beam size

  • Minimum (H x V) : 200.0 x 100.0  µm²
  • Maximum (H x V) : 200.0 x 100.0  µm²

Sample environments

  • He cryostat

Detectors

  • Crystal analyzer spectrometer (+XPAD or Vortex) for high-resolution fluorescence measurement
  • Si diodes (Hamamatsu) for monitoring and transmitted intensity measurements
  • Silicon drift detector (Vortex) for fluorescence measurement