A Johann-type X-ray emission spectrometer at the Rossendorf beamline

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• 作者：Kristina O. Kvashnina and Andreas C. Scheinost
• 关键词：X-ray emission spectrometer ; Johann geometry ; XANES ; HERFD ; XES ; RIXS ; actinides
• 刊名：Journal of Synchrotron Radiation
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：23
• 期：3
• 页码：836-841
• 全文大小：753K
• ISSN：1600-5775

文摘

This paper gives a detailed description, including equations, of the Johann-type X-ray emission spectrometer which has been recently installed and tested at the Rossendorf beamline (ROBL) of the European Synchrotron Radiation Facility. The spectrometer consists of a single spherically bent crystal analyzer and an avalanche photodiode detector positioned on the vertical Rowland cycle of 1 m diameter. The hard X-ray emission spectrometer (∼3.5–25 keV) operates at atmospheric pressure and covers the Bragg angles of 65°–89°. The instrument has been tested at high and intermediate incident energies, i.e. at the Zr K-edge and at the Au L₃-edge, in the second experimental hutch of ROBL. The spectrometer is dedicated for studying actinides in materials and environmental samples by high-energy-resolution X-ray absorption and X-ray emission spectroscopies.