Sandia National Laboratories’ Z Pulsed Power Facility, or "Z machine," a nuclear fusion research device located in Albuquerque, NM, is the most powerful x-ray generator in the world. In a collaboration among PML’s Radiation Physics Division, Artep Inc., and Sandia National Laboratories, set of 18 bent quartz crystals had their energy and sensitivity responses calibrated at NIST’s campus in MD. Curved crystals extend energy range of x rays that can be measured when emitted by Sandia’s Z machine.