An experimental setup to perform high‐pressure resonant X‐ray scattering (RXS) experiments at low temperature on I16 at Diamond Light Source is presented. The setup consists of a membrane‐driven diamond anvil cell, a panoramic dome and an optical system that allows pressure to be measured in situ using the ruby fluorescence method. The membrane cell, inspired by the Merrill–Bassett design, presents an asymmetric layout in order to operate in a back‐scattering geometry, with a panoramic aperture of 100° in the top and a bottom half dedicated to the regulation and measurement of pressure. It is specially designed to be mounted on the cold finger of a 4 K closed‐cycle cryostat and actuated at low‐temperature by pumping helium into the gas membrane. The main parts of the body are machined from a CuBe alloy (BERYLCO 25) and, when assembled, it presents an approximate height of 20–21 mm and fits into a 57 mm diameter. This system allows different materials to be probed using RXS in a range of temperatures between 30 and 300 K and has been tested up to 20 GPa using anvils with a culet diameter of 500 µm under quasi‐cryogenic conditions. Detailed descriptions of different parts of the setup, operation and the developed methodology are provided here, along with some preliminary experimental results.

中文翻译：

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I16共振X射线散射实验的高压开发

提出了一种在I16钻石光源上在低温下执行高压共振X射线散射（RXS）实验的实验装置。该装置包括一个膜片驱动的金刚石砧盒，一个全景圆顶和一个光学系统，该系统可以就地测量压力使用红宝石荧光法。膜盒的设计灵感来自Merrill-Bassett设计，呈现出不对称的布局，以便在向后散射的几何形状中运行，其顶部和底部的100％全景孔径专用于压力的调节和测量。它经过特殊设计，可安装在4 K闭环低温恒温器的冷指上，并通过将氦气泵入气膜在低温下启动。主体的主要部分由CuBe合金（BERYLCO 25）加工而成，组装后的高度约为20–21 mm，直径为57 mm。该系统允许在30至300 K的温度范围内使用RXS探测不同的材料，并且已在准低温条件下使用直径为500 µm的圆底铁砧测试了高达20 GPa的材料。