Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany.
Institute of Physics of the ASCR, 18221 Prague, Czech Republic.
Rev Sci Instrum. 2023 Mar 1;94(3):033501. doi: 10.1063/5.0133639.
A multipurpose imaging x-ray crystal spectrometer is developed for the high energy density instrument of the European X-ray Free Electron Laser. The spectrometer is designed to measure x rays in the energy range of 4-10 keV, providing high-resolution, spatially resolved spectral measurements. A toroidally bent germanium (Ge) crystal is used, allowing x-ray diffraction from the crystal to image along a one-dimensional spatial profile while spectrally resolving along the other. A detailed geometrical analysis is performed to determine the curvature of the crystal. The theoretical performance of the spectrometer in various configurations is calculated by ray-tracing simulations. The key properties of the spectrometer, including the spectral and spatial resolution, are demonstrated experimentally on different platforms. Experimental results prove that this Ge spectrometer is a powerful tool for spatially resolved measurements of x-ray emission, scattering, or absorption spectra in high energy density physics.
一种多用途成像 X 射线晶体光谱仪，是为欧洲 X 射线自由电子激光的高能密度仪器开发的。该光谱仪旨在测量能量范围为 4-10keV 的 X 射线，提供高分辨率、空间分辨的光谱测量。使用了环形弯曲的锗（Ge）晶体，允许 X 射线从晶体衍射，同时沿着一维空间分布成像，并沿另一个方向进行光谱分辨。进行了详细的几何分析来确定晶体的曲率。通过光线追踪模拟计算了光谱仪在各种配置下的理论性能。在不同的平台上进行了实验，验证了光谱仪的关键性能，包括光谱和空间分辨率。实验结果证明，这种 Ge 光谱仪是在高能密度物理中进行 X 射线发射、散射或吸收光谱的空间分辨测量的有力工具。
