A highly oriented pyrolytic graphite crystal spectrometer in von Hamos geometry for x-ray fluorescence experiments

Abstract

A high-resolution x-ray spectrometer has been designed and constructed, using a highly oriented pyrolytic graphite Bragg crystal in von Hamos geometry. The spectrometer was designed to study x-ray fluorescence emissions of Ti, and it covers a detecting energy range from 4000 eV to 5500 eV. The factors affecting the spectral resolution and efficiency of the spectrometer were discussed. In particular, the bending of the spectral lines on the image plate was also corrected, due to the detecting plane not being parallel to the axis of the cylindrically curved crystal. Its performance has been evaluated in a laser–foil interaction experiment. The experimental results indicate that the spectrometer is of good spectral resolution and relatively high efficiency, which enables it as a suitable device for the measurements of high-resolution x-ray fluorescence spectroscopy.

Time-resolved K-shell x-ray spectra of nanosecond laser-produced titanium tracer in gold plasmas

“…The well-resolved Ly-α and He-α lines with the accurately known photon energies were used as reference lines for the wavelength calibration. [23] The signal was filtered with a 600 µm thick beryllium at the front of the spectrometer, which was set to shield the stray laser light to obtain a good signal-tonoise ratio. Six bright spots in the upper left of Fig.…”