Nowak S H, Armenta R, Schwartz C P, Gallo A, Abraham B, Garcia-Esparza A T, Biasin E, Prado A, Maciel A, Zhang D, Day D, Christensen S, Kroll T, Alonso-Mori R, Nordlund D, Weng T-C, Sokaras D
SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, California 94025, USA.
National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, USA.
Rev Sci Instrum. 2020 Mar 1;91(3):033101. doi: 10.1063/1.5121853.
We present a high energy resolution x-ray spectrometer for the tender x-ray regime (1.6-5.0 keV) that was designed and operated at Stanford Synchrotron Radiation Lightsource. The instrument is developed on a Rowland geometry (500 mm of radius) using cylindrically bent Johansson analyzers and a position sensitive detector. By placing the sample inside the Rowland circle, the spectrometer operates in an energy-dispersive mode with a subnatural line-width energy resolution (∼0.32 eV at 2400 eV), even when an extended incident x-ray beam is used across a wide range of diffraction angles (∼30° to 65°). The spectrometer is enclosed in a vacuum chamber, and a sample chamber with independent ambient conditions is introduced to enable a versatile and fast-access sample environment (e.g., solid/gas/liquid samples, in situ cells, and radioactive materials). The design, capabilities, and performance are presented and discussed.
我们展示了一种用于软X射线区域（1.6 - 5.0 keV）的高能量分辨率X射线光谱仪，该光谱仪是在斯坦福同步辐射光源处设计并运行的。该仪器基于罗兰几何结构（半径500 mm）开发，使用圆柱形弯曲的约翰逊分析器和位置敏感探测器。通过将样品放置在罗兰圆内，即使在很宽的衍射角范围（约30°至65°）使用扩展的入射X射线束时，该光谱仪也能在能量色散模式下运行，具有亚自然线宽的能量分辨率（在2400 eV时约为0.32 eV）。光谱仪被封闭在真空室内，并引入了具有独立环境条件的样品室，以实现通用且快速访问的样品环境（例如，固体/气体/液体样品、原位样品池和放射性材料）。本文介绍并讨论了该光谱仪的设计、功能和性能。
