论文标题
与连贯的X射线相连的SI中成像超快动力学衍射波前波前线
Imaging ultrafast dynamical diffraction wavefronts in strained Si with coherent X-rays
论文作者
论文摘要
单晶的动态衍射效应产生高度单色平行的X射线梁，并以几微米的相互分离和几个FS的时间延迟（所谓的回声）。这种超快衍射效果用于自种群中的X射线游离电子激光器，以改善光束单色性。在这里，我们提出了来自SI晶体的回波的连贯X射线成像测量，并证明可以使用小的表面应变来调整其时间延迟。这些结果是朝着应变新X射线光学元件的雄心勃勃的目标迈出的第一步。
Dynamical diffraction effects in single crystals produce highly monochromatic parallel X-ray beams with a mutual separation of a few micrometer and a time-delay of a few fs -the so-called echoes. This ultrafast diffraction effect is used at X-ray Free Electron Lasers in self-seeding schemes to improve beam monochromaticity. Here, we present a coherent X-ray imaging measurement of echoes from Si crystals and demonstrate that a small surface strain can be used to tune their temporal delay. These results represent a first step towards the ambitious goal of strain-tailoring new X-ray optics.
