Möller Johannes, Léonardon Joachim, Gorini Jacques, Dattani Rajeev, Narayanan Theyencheri
ESRF - The European Synchrotron, 38043 Grenoble, France.
Rev Sci Instrum. 2016 Dec;87(12):125116. doi: 10.1063/1.4972296.
We present a new experimental setup for time-resolved solution small-angle X-ray scattering (SAXS) studies of kinetic processes induced by sub-ms hydrostatic pressure jumps. It is based on a high-force piezo-stack actuator, with which the volume of the sample can be dynamically compressed. The presented setup has been designed and optimized for SAXS experiments with absolute pressures of up to 1000 bars, using transparent diamond windows and an easy-to-change sample capillary. The pressure in the cell can be changed in less than 1 ms, which is about an order of magnitude faster jump than previously obtained by dynamic pressure setups for SAXS. An additional temperature control offers the possibility for automated mapping of p-T phase diagrams. Here we present the technical specifications and first experimental data taken together with a preview of new research opportunities enabled by this setup.
我们展示了一种用于时间分辨溶液小角X射线散射（SAXS）研究亚毫秒静水压力跃变所引发的动力学过程的新型实验装置。它基于一个高力压电堆栈致动器，利用该致动器可动态压缩样品体积。所展示的装置是为绝对压力高达1000巴的SAXS实验而设计和优化的，采用了透明金刚石窗口和易于更换的样品毛细管。样品池中的压力可在不到1毫秒的时间内改变，这比之前用于SAXS的动态压力装置所实现的压力跃变速度快约一个数量级。额外的温度控制为p-T相图的自动测绘提供了可能。在此，我们介绍该装置的技术规格、首批实验数据以及由该装置带来的新研究机会的预览。
