| Autor: |
Childs, Christian, Smith, Dean, Smith, G. Alexander, Ellison, Paul, Sneed, Daniel, Hinton, Jasmine, Siska, Emily, Pigott, Jeffrey S., Rod, Eric, O'Donnell, William, Salem, Ran, Sturtevant, Blake, Scharff, R. Jason, Velisavljevic, Nenad, Park, Changyong, Salamat, Ashkan |
| Předmět: |
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| Zdroj: |
Review of Scientific Instruments; Aug2022, Vol. 93 Issue 8, p1-8, 8p |
| Abstrakt: |
We present a portable CO2 laser heating system for in situ x-ray absorption spectroscopy (XAS) studies at 16-BM-D (High Pressure Collaborative Access Team, Advanced Photon Source, Argonne National Laboratory). Back scattering optical measurements are made possible by the implementation of a Ge beamsplitter. Optical pyrometry is conducted in the near-infrared, and our temperature measurements are free of chromatic aberration due to the implementation of the peak-scaling method [A. Kavner and W. R. Panero, Phys. Earth Planet. Inter. 143–144, 527–539 (2004) and A. Kavner and C. Nugent, Rev. Sci. Instrum. 79, 024902 (2008)] and mode scrambling of the input signal. Laser power stabilization is established using electronic feedback, providing a steady power over second timescales [Childs et al., Rev. Sci. Instrum. 91, 103003 (2020)]—crucial for longer XAS collections. Examples of in situ high pressure–temperature extended x-ray absorption fine structure measurements of ZrO2 are presented to demonstrate this new capability. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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