Motivation
With the advent of high-resolution (l/Dl ~ 1000) x-ray spectroscopy in the last several years, a wealth of spectroscopic data for photoionized sources has been generated, and the level of detail and accuracy demanded of models has increased dramatically. 
By producing and measuring a well-characterized x-ray photoionized plasma in the laboratory, we hope to benchmark the codes used to model x-ray spectra of active galactic nuclei, x-ray binaries, and other astrophysical sources for which photoionization dominates collisional ionization.