Speaker
Description
The European Synchrotron Radiation Facility beamline ID01 performs Bragg Coherent Diffraction Imaging and X-ray nano-diffraction experiments with in-situ environments. A new sample environment for nanoparticles has been designed and tested. It combines a furnace and a pressurized X-ray transparent chamber, without the use of beryllium for safety reasons. The required 180°C horizontal and 45°C vertical viewing angles necessitate the use of a dome-shaped pressure chamber. Early in the design phase, the thermal effects of the 500°C furnace on the dome’s mechanical properties were identified as critical. A Finite Element Analysis (FEA) study was conducted, accounting for heat sources, gas turbulence, and static pressure. Aluminium 6082-T6 was chosen for the pressurized dome, providing a safe and easy-to-procure solution. A dome thickness of 0.5mm provides 80% X-ray transmission at 33keV. The sample, a 200nm-diameter palladium nanoparticle, reaches 340°C in a 50-bar hydrogen atmosphere. Unlike beryllium-based pressure domes, this design uses aluminium, avoiding machining difficulties, procurement issues, and safety hazards.
Funding Agency
The European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 818823).
