Energy dispersive X-ray diffraction measurements using a multi-element SSD, 2

Katayama, Yoshinori; Saito, Hiroyuki; Kaneko, Hiroshi*

In high-temperature high-pressure X-ray diffraction experiments using a large-volume press, a sharp collimator is used to remove background scattering. An energy-dispersive X-ray diffraction method is efficient because a whole diffraction pattern can be measured at a fixed diffraction angle. However, several measurements at different diffraction angles are necessary for wide-Q range measurements in liquid studies. We have constructed a system with a multi-element SSD with four 8mm 8mm elements to reduce data acquisition time. To remove background scattering a multi-channel collimator was used. Experiments were carried out using a cubic-type multi-anvil press on BL14B1 beamline at SPring-8. We have measured diffraction pattern of silica glass at ambient conditions and liquid iron hydrogen alloy under high pressure and high temperature using the system.