Fig. 2.

Sample pressure as a function of load of three representative FIB milled toroidal diamond anvil designs. Sample pressure shown as a function of He gas pressure in the membrane of the DAC (bottom axis) and loading force on the diamonds (top axis). Full black circles show pressure from an anvil pair of V1 design, open red triangles are V2 design, and blue diamonds represent pressure points from two pairs of the V3 design anvils, solid blue diamonds first pair and open blue diamonds second pair. Error bars represent experimental uncertainty due to standard deviation in measured atomic volume of the Re