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.

Disciplines

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

Applications

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

Techniques

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

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.