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.

中文翻译：

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ESRF纳米探针束线ID16B的氦气微型恒温器：特性和性能

已经为欧洲同步加速器的硬X射线纳米探针ID16B开发了氦微低温恒温器，以收集低温（<10 K）时X射线激发的光致发光和X射线荧光。微型低温恒温器经过专门设计，可适应光束线施加的强空间限制和高要求机械限制，以提供无振动的运行和最大的热稳定性。本文报告了微型恒温器的详细设计，架构和技术要求，并介绍了使用低温设备测得的第一批实验数据。最终的冷冻系统具有极高的热稳定性，快速冷却和超低振动。