Steinmann Ricardo G, Martinez-Criado Gema, Salomon Damien, Vitoux Hugo, Tucoulou Remi, Villanova Julie, Laboure Sylvain, Eymery Joel, Segura-Ruiz Jaime
ESRF - The European Synchrotron, 71 Avenue des Martyrs, 30843 Grenoble, France.
Univ. Grenoble Alpes, CEA, IRIG, MEM, NRS, 38000 Grenoble, France.
J Synchrotron Radiat. 2020 Jul 1;27(Pt 4):1074-1079. doi: 10.1107/S1600577520007110. Epub 2020 Jun 16.
A helium mini-cryostat has been developed for the hard X-ray nanoprobe ID16B of the European Synchrotron to collect X-ray excited optical luminescence and X-ray fluorescence at low temperature (<10 K). The mini-cryostat has been specifically designed to fit within the strong space restrictions and high-demanding mechanical constraints imposed by the beamline to provide vibration-free operation and maximal thermal stability. This paper reports the detailed design, architecture and technical requirements of the mini-cryostat, and presents the first experimental data measured using the cryogenic equipment. The resulting cryo-system features ultimate thermal stability, fast cool-down and ultra-low vibrations. The simultaneous X-ray fluorescence and X-ray excited optical luminescence data acquired from bulk GaN and core/shell InGaN/GaN multi-quantum wells validated the excellent performance of the cryostat with ultimate resolution, stability and sensitivity.
为欧洲同步辐射装置的硬X射线纳米探针ID16B研制了一种氦低温恒温器，用于在低温（<10 K）下收集X射线激发的光致发光和X射线荧光。该低温恒温器经过专门设计，以适应光束线所带来的严格空间限制和高要求的机械约束，从而实现无振动运行和最大的热稳定性。本文报告了该低温恒温器的详细设计、架构和技术要求，并展示了使用该低温设备测量的首批实验数据。由此产生的低温系统具有极高的热稳定性、快速冷却和超低振动的特点。从块状GaN和核壳InGaN/GaN多量子阱获得的同步X射线荧光和X射线激发光致发光数据，验证了该低温恒温器具有极高分辨率、稳定性和灵敏度的优异性能。
