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Background <p>The 1W1B beamline, a vital hard X-ray absorption spectroscopy facility in northern China, has been running for over 20&#xa0;years. It has attracted a large user community and achieved high productivity. However, the available beam time is severely insufficient to meet the growing user demand. Furthermore, a new upgrade project was implemented in 2024, and the higher flux necessitates a reevaluation of thermal deformation in optical components of the beamline.</p> Methods <p>In recent years, substantial efforts have been made to enhance beam performance, develop many important techniques and improve experimental efficiency. Following the new upgrade project in 2024, a set of water-cooled switchable carbon film filters was installed in the front end of the beamline to better manage the heat load. Additionally, a newly-designed double crystal monochromator has replaced the old one to enhance stability during energy scans.</p> Results and Conclusion <p>These improvements are expected to ensure the safe and stable operation of 1W1B beamline following the upgrade project, and also provide improved beam performance for the XAFS user community.</p>

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The performance improvements and recent upgrades on the 1W1B beamline

  • 期刊论文

  • 发表日期：

    2026年2月5日

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  • Shengqi Chu,
  • Hao Liang,
  • Shaofeng Wang,
  • Lidan Gao,
  • Pengfei An,
  • Huan Huang,
  • Lirong Zheng,
  • Jing Zhang,
  • Yaning Xie,
  • Tiandou Hu

摘要

Background

The 1W1B beamline, a vital hard X-ray absorption spectroscopy facility in northern China, has been running for over 20 years. It has attracted a large user community and achieved high productivity. However, the available beam time is severely insufficient to meet the growing user demand. Furthermore, a new upgrade project was implemented in 2024, and the higher flux necessitates a reevaluation of thermal deformation in optical components of the beamline.

Methods

In recent years, substantial efforts have been made to enhance beam performance, develop many important techniques and improve experimental efficiency. Following the new upgrade project in 2024, a set of water-cooled switchable carbon film filters was installed in the front end of the beamline to better manage the heat load. Additionally, a newly-designed double crystal monochromator has replaced the old one to enhance stability during energy scans.

Results and Conclusion

These improvements are expected to ensure the safe and stable operation of 1W1B beamline following the upgrade project, and also provide improved beam performance for the XAFS user community.