ID15B - High Pressure Diffraction Beamline

Synopsis

Beamline ID15B is dedicated to the determination of structural properties of solids at high pressure using angle-dispersive-diffraction with diamond anvil cells.
Status:  open

Disciplines

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

Applications

  • Fundamental physics
  • New materials
  • Earth science
  • Chemistry
  • Mineralogy
  • Energy research

Techniques

  • Powder diffraction
  • Single-crystal diffraction
  • Diffuse X-ray scattering

Energy range

  • 30.0 - 30.0  keV

Beam size

  • Minimum (H x V) : 5.0 x 5.0  µm²
  • Maximum (H x V) : 30.0 x 30.0  µm²

Sample environments

  • Membrane-type diamond anvil cells (0-60 GPa)
  • Automatic pressure controller
  • Liquid He cooled cryostat to perform high pressure experiments at low temperatures (down to 10K)
  • External resistive heating equipment for high temperatures up to 600K
  • External Nd-YAG laser system for high temperature annealing of samples inside the diamond anvil cell

Detectors

  • Large area (430 x 350 mm) MAR555 flat panel detector
  • In-situ ruby fluorescence measurement for pressure determination
  • In-situ Raman spectrometer

Technical details

The beam from an in-vacuum U20 insertion device is focused by vertical and horizontal transfocator and monochromatized by Si(111) Bragg monochromator. The working energy for high pressure experiments is 30 keV with a flux of 1012 photons/s at 200 mA resulting in typical exposure times of 1 sec. The beam size on the sample is about 30 x 30 µm2 but can be made as small as 5 x 5 µm2 for megabar pressure experiments.