Specific Synchrotron Radiation Facilities Research Report
Online ISSN : 2760-5434
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SPring-8 Document D 2026-005
Displaying 1-17 of 17 articles from this issue
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  • Plasma CVM to Improve meV Monochromator Resolution
    Hiroshi Fukui, Taishun Manjo, Daisuke Ishikawa, Alfred Q. R. Baron
    2026Volume 14Issue 2 Pages 159-161
    Published: April 30, 2026
    Released on J-STAGE: May 01, 2026
    DOIhttps://doi.org/10.18957/rr.14.2.159
    JOURNAL OPEN ACCESS
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    We investigate how the energy resolution of a grazing incidence backscattering meV-scale monochromator is affected by surface treatment using plasma chemical vapor machining (plasma-CVM). This has been suggested to be less damaging to crystals than other combined etching/polishing processes such a mechano-chemical polishing (MCP). It was observed that the energy resolution improved slightly and became more uniform when plasma-CVM treatment was applied to a crystal finished using the MCP. However, it seems that the underlying crystal quality may have the largest impact on the resolution than plasma-CVM vs MCP.
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Section SACLA
  • Ultrafast Structural Dynamics in Systems with Limited Long-Range Order through Pair Distribution Function Analysis
    Lise Joost Støckler, Rasmus Baden Stubkjær, Anders Bæk Borup, Jonas Be ...
    2026Volume 14Issue 2 Pages 162-169
    Published: April 30, 2026
    Released on J-STAGE: May 01, 2026
    DOIhttps://doi.org/10.18957/rr.14.2.162
    JOURNAL OPEN ACCESS
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    　Pump-probe Pair Distribution Function (PDF) techniques to capture ultrafast structural dynamics in systems with limited long-range order at XFELs have seen little progress due to limited spatial resolution (Qmax). To increase the Q-coverage, a detector setup was conceptualized, and a data treatment pipeline was developed. Unfortunately, several critical issues were encountered during the experiment, causing the Qmax-value to improve only marginally compared to previous records (~10 Å-1 compared to ~8 Å-1).[1] Although this hindered the extraction of reliable time-resolved results, observations of structural changes from pump-probe PDF experiments at SACLA seem to be within reach if the experimental conditions can be optimized slightly.[2]
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