Kwon Ouyoung, Ha Sungsoo, Noh Do Young, Kang Hyonchol, Iqbal Mazhar, Anwar Muhammad Ijaz, Kim Sunam
Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea.
Department of Materials Science and Engineering, Chosun University, Gwangju 61452, Republic of Korea.
J Synchrotron Radiat. 2025 Mar 1;32(Pt 2):281-287. doi: 10.1107/S1600577525000463. Epub 2025 Feb 12.
We present a 3D reciprocal-space mapping (RSM) method using a pink self-amplified spontaneous emission (SASE) X-ray free-electron laser beam. The energy of each specific pulse in a SASE beam can be determined using the diffraction pattern of a specimen excited by pumping itself as a spectroscopic reference. A thin slab of RSM, whose thickness corresponds to the energy bandwidth of the pink beam, is successfully reconstructed using the proposed method. By rocking a sample in a few steps, we obtained a 3D RSM covering both the diffuse scattering and the Bragg rod in NiO thin films during a pump-probe X-ray diffraction measurement.
我们提出了一种使用粉色自放大自发辐射（SASE）X射线自由电子激光束的三维倒易空间映射（RSM）方法。SASE光束中每个特定脉冲的能量可以通过将自身作为光谱参考来激发样品的衍射图样来确定。利用所提出的方法成功重建了厚度对应于粉色光束能量带宽的RSM薄片。通过分几步摇动样品，我们在泵浦-探测X射线衍射测量中获得了覆盖NiO薄膜中漫散射和布拉格棒的三维RSM。
