A versatile experimental system for tracking ultrafast chemical reactions with X-ray free-electron lasers

An experimental system, SPINETT (SACLA Pump-probe INstrumEnt for Tracking Transient dynamics), dedicated for ultrafast pump-probe experiments using X-ray free-electron lasers has been developed. SPINETT consists of a chamber operated under 1 atm helium pressure, two Von Hamos spectrometers, and a large two-dimensional detector having a short work distance. This platform covers complementary X-ray techniques; one can perform time-resolved X-ray absorption spectroscopy, time-resolved X-ray emission spectroscopy, and time-resolved X-ray diffuse scattering. Two types of liquid injectors have been prepared for low-viscosity chemical solutions and for protein microcrystals embedded in a matrix. We performed a test experiment at SPring-8 Angstrom Compact free-electron LAser and demonstrated the capability of SPINETT to obtain the local electronic structure and geometrical information simultaneously. (C) 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

一种用于利用X射线自由电子激光进行超快泵浦 - 探测实验的实验系统SPINETT（用于追踪瞬态动力学的SACLA泵浦 - 探测仪器）已经被开发出来。SPINETT由一个在1个标准大气压氦气环境下运行的腔室、两台冯·哈莫斯光谱仪以及一个工作距离较短的大型二维探测器组成。该平台涵盖了互补的X射线技术；人们可以进行时间分辨X射线吸收光谱、时间分辨X射线发射光谱以及时间分辨X射线漫散射实验。已经为低粘度化学溶液以及嵌入基质中的蛋白质微晶准备了两种类型的液体注入器。我们在SPring - 8埃紧凑型自由电子激光装置上进行了一次测试实验，并展示了SPINETT同时获取局部电子结构和几何信息的能力。（C）2019作者。除另有说明外，所有文章内容均根据知识共享署名（CC BY）许可协议（http://creativecommons.org/licenses/by/4.0/）授权。