| Autor: |
Malzer W; Institute for Optic and Atomic Physics, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany., Grötzsch D; Institute for Optic and Atomic Physics, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany., Gnewkow R; Institute for Optic and Atomic Physics, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany., Schlesiger C; Institute for Optic and Atomic Physics, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany., Kowalewski F; Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany., Van Kuiken B; Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany., DeBeer S; Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany., Kanngießer B; Institute for Optic and Atomic Physics, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany. |
| Abstrakt: |
We have built a laboratory spectrometer for X-ray emission spectroscopy. The instrument is employed in catalysis research. The key component is a von Hamos full cylinder optic with Highly Annealed Pyrolytic Graphite (HAPG) as a dispersive element. With this very efficient optic, the spectrometer subtends an effective solid angle of detection of around 1 msr, allowing for the analysis of dilute samples. The resolving power of the spectrometer is approximately E/ΔE = 4000, with an energy range of ∼2.3 keV-10 keV. The instrument and its characteristics are described herein. Further, a comparison with a prototype spectrometer, based on the same principle, shows the substantial improvement in the spectral resolution and energy range for the present setup. The paper concludes with a discussion of sample handling. A compilation of HAPG fundamentals and related publications are given in a brief Appendix. |
