A miniature X-ray emission spectrometer (miniXES) for high-pressure studies in a diamond anvil cell

miniXES
miniXES

A miniature X-ray emission spectrometer has been successfully commissioned by a team of researchers from the University of Washington, LLNL and HPCAT. The spectrometer, based on a coarsely diced approximate of the Johansson optics, contains six small flat Ge ( 3 3 1 ) crystals, which are ~7.4cm away from sample and have a total solid angle of ~50msr, roughly equivalent to that of six traditional spherically bent crystal analyzers. The overall energy resolution is ~1.3eV. The new XES spectrometer provides improved efficiency in X-ray emission spectroscopy (XES) measurements, which has been demonstrated in RXES measurements for Pr at high pressures in a diamond anvil cell. (Pacold et. al. J. Synchrotron Rad (2012),  19). (Photograph of the miniXES spectrometer at 16ID-D with DAC and Pilatus in place)