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
Materials and Engineering
Chemistry

Applications

Fundamental physics
New materials
Earth science
Chemistry
Mineralogy
Energy research

Techniques

Diffuse X-ray scattering
Powder diffraction
Single-crystal diffraction

Energy range

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 EIGER2 X 9M CdTe (340x370 mm) 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.