The static focusing optics of the existing energy‐dispersive XAFS beamline BL‐8 have been advantageously exploited to initiate diamond anvil cell based high‐pressure XANES experiments at the Indus‐2 synchrotron facility, India. In the framework of the limited photon statistics with the 2.5 GeV bending‐magnet source, limited focusing optics and 4 mm‐thick diamond windows of the sample cell, a (non‐trivial) beamline alignment method for maximizing photon statistics at the sample position has been designed. Key strategies include the selection of a high X‐ray energy edge, the truncation of the smallest achievable focal spot size to target size with a slit and optimization of the horizontal slit position for transmission of the desired energy band. A motor‐scanning program for precise sample centering has been developed. These details are presented with rationalization for every step. With these strategies, Nb K‐edge XANES spectra for Nb₂O₅ under high pressure (0–16.9 GPa) have been generated, reproducing the reported spectra for Nb₂O₅ under ambient conditions and high pressure. These first HPXANES results are reported in this paper. The scope of extending good data quality to the EXAFS range in the future is addressed. This work should inspire and guide future high‐pressure XAFS experiments with comparable infrastructure.

中文翻译：

---

Indus-2同步加速器装置在基于弯曲磁铁的能量分散XAFS光束线BL-8上获得了首个高压XAFS

现有能量分散型XAFS光束线BL-8的静态聚焦光学器件已被有利地用于在印度Indus-2同步加速器设施中启动基于金刚石砧座的高压XANES实验。在具有2.5 GeV弯曲磁体源，有限聚焦光学系统和样品池4 mm厚金刚石窗口的有限光子统计框架内，一种（非平凡的）光束线对准方法可最大化样品位置的光子统计被设计。关键策略包括选择高X射线能量边缘，将具有切缝的可实现的最小焦斑尺寸截断为目标尺寸，以及优化水平切缝位置以传输所需的能带。已经开发了用于精确样品居中的电机扫描程序。这些细节在每个步骤中都经过合理化介绍。通过这些策略，NbNb ₂ O ₅在高压（0–16.9 GPa）下的K边缘XANES光谱已生成，再现了在环境条件和高压下报告的Nb ₂ O _5的光谱。这些第一批HPXANES结果报告在本文中。解决了将来将良好的数据质量扩展到EXAFS范围的范围。这项工作应启发并指导未来具有可比基础设施的高压XAFS实验。