ID09A - White Beam Beamline, High Pressure Station

Synopsis

Beamline ID09A is dedicated to the determination of structural properties of solids at high pressure using angle-dispersive-diffraction with diamond anvil cells.

The white beam from an in-vacuum U17 insertion-device is vertically focused by a spherical mirror and horizontally by a bent Silicon (111) monochromator. The typical working energy for high pressure experiments is 30 keV with a flux of 10¹¹ photons/s at 200 mA. The beam size on the sample is normally about 30x30 µm² but can be made as small as 10x10 µm² for megabar pressure experiments.

The scattered radiation is collected by an image-plate detector, an on-line Mar555 reader, which has a 430 x 350 mm (555mm diagonal) active area.

A laser spectrometer is available for pressure determination by the ruby fluorescence method. It is also possible to perform Raman scattering experiments simultaneously.

The beamline is equipped with several membrane-type diamond anvil cells (0-40 GPa), a Liquid He cooled cryostat to perform high pressure experiments at low temperatures (down to 50 K), and external resistive heating equipment for high temperatures up to 600 K.

A Nd-YAG laser system is available externally for high temperature annealing of samples inside the diamond anvil cell.