论文标题
用于X射线游离电子激光脉冲的弯曲晶格光谱仪的分辨率：钻石与硅
Resolution of a bent-crystal spectrometer for X-ray free electron laser pulses: diamond vs. silicon
论文作者
论文摘要
评估了基于强弯曲的单晶（弯曲半径为10 cm或更少）的光谱仪的分辨率函数。结果表明，分辨率由两个参数控制，（i）所选反射与晶体厚度的晶格间距的比例，以及（ii）所选晶体的单个参数，包含晶体厚度，其弯曲半径和各向异性弹性常数。由于其独特的弹性特性，钻石可提供比硅更高的分辨率。结果允许优化硬X射线游离电子激光源的弯曲晶体光谱仪的参数。
The resolution function of a spectrometer based on a strongly bent single crystal (bending radius of 10 cm or less) is evaluated. It is shown that the resolution is controlled by two parameters, (i) the ratio of the lattice spacing of the chosen reflection to the crystal thickness and (ii) a single parameter comprising crystal thickness, its bending radius, and anisotropic elastic constants of the chosen crystal. Diamond, due to its unique elastic properties, can provide notably higher resolution than silicon. The results allow to optimize the parameters of bent crystal spectrometers for the hard X-ray free electron laser sources.
