X-ray optics for advanced ultrafast pump-probe X-ray experiments at SACLA
X-ray optics for advanced ultrafast pump-probe X-ray experiments at SACLA
复制标题
DOI：
10.1107/s1600577518018362
复制
发表时间：
2019-03-01
影响因子：
2.5
通讯作者：
Yabashi, Makina
中科院分区：
文献类型：
--
作者：
Katayama, Tetsuo;Hirano, Takashi;Yabashi, Makina
在Spring-8 angstrom紧凑型自由电子激光器的硬X射线光束线BL3上，用不同的方法进行了X射线光学实验。安装了双通道切割晶体单色仪(DCCM)和复合折射透镜(CRL)来调整光束条件。这些X射线光学器件可以与一个到达时间监测器同时工作，该监测器可以补偿计时抖动和漂移。采用等离子体化学汽化加工技术对DCCM中的沟槽切割晶体内壁进行加工，以消除晶体损伤。研究了CCS的四跳反射分布，获得了良好的衍射质量。CRL的使用实现了二维X射线聚焦，光斑大小约为1.5微米×1.5微米全宽，同时为5-15keV的较宽光子能量范围保持了合理的吞吐量。
X-ray optics were implemented for advanced ultrafast X-ray experiments with different techniques at the hard X-ray beamline BL3 of SPring-8 angstrom ngstrom Compact free-electron LAser. A double channel-cut crystal monochromator (DCCM) and compound refractive lenses (CRLs) were installed to tailor the beam conditions. These X-ray optics can work simultaneously with an arrival-timing monitor that compensates for timing jitter and drift. Inner-walls of channel-cut crystals (CCs) in the DCCM were processed by plasma chemical vaporization machining to remove crystallographic damage. Four-bounced reflection profiles of the CCs were investigated and excellent diffraction qualities were achieved. The use of CRLs enabled two-dimensional X-ray focusing with a spot size of approximate to 1.5 mu m x 1.5 mu m full width at half-maximum, while keeping reasonable throughputs for a wide photon energy range of 5-15keV.