In collaboration with the instrument staff, members of the Carnegie IDT team (Guthrie, Boehler, Li, Machida) have increased the maximum pressure for measuring structural refinement-quality data to 57 GPa. At this (unofficial) record-breaking pressure Bragg intensities were clearly visible down to ~0.75 Å and full structural refinements have conducted.
On increasing the pressure further, there was a failure of the carbide seat (at an estimated 60 GPa). In ongoing developments, these seats will be replaced with a sintered diamond variant, with the aim of extending the maximum pressure further into the 100 GPa range.
The figure shows a Rietveld fit to a typical data set from a test sample of D2O at around 3 GPa measured on SNAP.