Horlait Denis, Faure Rémi, Thomas Bertrand A, Devert Nicolas, Amany Marie-Lyne, Carlot Gaëlle, Gilabert Éric
Université de Bordeaux, CNRS, CENBG-IN2P3, F-33170 Gradignan, France.
CEMHTI, CNRS, UPR3079, University of Orléans, F-45071 Orléans, France.
Rev Sci Instrum. 2021 Dec 1;92(12):124102. doi: 10.1063/5.0068858.
A new heating and gas treatment line for Thermo-Desorption Spectrometry (TDS) of noble gases (He, Ne, Ar, Kr, and Xe) is presented. It was built with the primary objective to offer advanced temperature controls and capabilities while working in a cold environment. By choosing a high-power continuous wave laser as the heating source and using a proportional-integral-derivative controller system, TDS of noble gases can now be performed with fast and highly steady heating ramps (e.g., less than 1 °C deviation from the set point for ≤1 °C s ramps). Sample temperature over 2000 °C can also routinely be reached, with limited heating of the sample support and the sample chamber, offering the possibility to have several samples awaiting in the ultra-high vacuum chamber. We also present the development efforts made to increase temperature homogeneity of the heated sample while limiting the contact with the sample holder. Recent results acquired with this TDS setup on krypton thermal diffusion in uranium dioxide (UO) as a function of O additions are also presented as an application example.
本文介绍了一种用于稀有气体（氦、氖、氩、氪和氙）热脱附光谱法（TDS）的新型加热和气体处理线。其建造的主要目的是在寒冷环境中工作时提供先进的温度控制和功能。通过选择高功率连续波激光器作为加热源并使用比例积分微分控制器系统，现在可以在快速且高度稳定的加热速率下进行稀有气体的TDS（例如，对于≤1°C/s的加热速率，与设定点的偏差小于1°C）。还可以常规地达到超过2000°C的样品温度，同时样品支架和样品腔的加热有限，这使得在超高真空腔中有多个样品等待检测成为可能。我们还介绍了为提高加热样品的温度均匀性同时限制与样品架接触所做的研发工作。作为应用示例，还展示了使用此TDS装置获得的关于氪在二氧化铀（UO）中的热扩散随氧添加量变化的最新结果。
