Development of the sample mounted horizontally Laboratory Ultra-Soft X-Ray Absorption Spectrometer.

我们建立了一个新型的实验室超软x射线吸收（USXA）光谱仪，优化了50 eV至150 eV的超软x射线（USX）区域，并对样品进行了水平安装。该光谱仪可作为软x射线吸收光谱的分析工具，用于科学和工业应用。它具有~ 100 eV光子的高通量，是研究轻元素化合物化学和材料性质的理想实验室仪器。我们的USXAFS光谱仪采用专门开发的激光产生准连续高亮度USX源和最近开发的高效低噪声检测器系统，能够通过总电子产率（TEY）方法或其他方法在USX区域测量XAS。该高效实验室USXA光谱仪是一个完整的计算机控制交钥匙系统，配备了用户友好的控制和数据采集软件以及简单的样品加载机构，以非常快的测量时间和准确的能量位置获得XAS。在每个样品不到5分钟的时间内，就可以获得具有高精度吸收特征能量的吸收光谱。将反射率实验的结果与ALS仪的结果进行了比较。这两个结果都表明，我们的实验室光谱仪可以获得与同步加速器仪器相似的高通量和窄光束尺寸，并具有良好的重复性。几种锂化合物的Li-K吸收边的测量曲线与同步加速器测量结果在测量范围内吻合较好。这些结果已经被报道过，同时也报道了样品的制备及其在同步加速器上的表征。

We have built a novel Laboratory Ultra-Soft X-Ray Absorption(USXA) Spectrometer optimized for the 50 eV to 150 eV Ultra-Soft X-Ray(USX) region and for the sample mounted horizontally. This Spectrometer can be used for scientific and industrial applications of soft x-ray absorption spectroscopy as an analytical tool. The high flux of〜100 eV photons would make it an ideal laboratory based instrument for the study of the chemistry and material properties of light element compounds. Our USXAFS spectrometer utilizes a specially developed laser generated quasi continuum high brightness USX source and a recently developed high efficient low noise detector system, enabling to measure XAS by a total electron yield(TEY) method or another method in the USX region. This efficiency laboratory USXA spectrometer is a complete computer controlled turnkey system, equipped with a user friendly control and data acquisition software and a simple sample loading mechanism to obtain XAS with very fast measurement time and accurate energy positions. The absorption spectra with very high accuracy in energy of the absorption features can be obtained in less than 5 minutes per sample. The results obtained from the reflectivity experiment were compared with those obtained by the ALS instrument. Both results indicate that our laboratory spectrometer gives the similar high flux and narrow beam size and excellent similar repeatability obtained from those of the synchrotron instrument. The measured curves of Li-K absorption edge for several lithium compounds show good fit in with those obtained by the synchrotron measurement within the measured range. These results were already reported and the sample preparations and their characterizations using by synchrotron instruments were also reported.