Arima-Osonoi Hiroshi, Miyata Noboru, Yoshida Tessei, Kasai Satoshi, Ohuchi Keiichi, Zhang Shuoyuan, Miyazaki Tsukasa, Aoki Hiroyuki
Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society, 162-1 Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan.
Materials and Life Science Division, J-PARC Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan.
Rev Sci Instrum. 2020 Oct 1;91(10):104103. doi: 10.1063/5.0021128.
We developed a novel humidity control system for neutron reflectivity measurements based on the two-way gas-flow method that can generate up to 85% relative humidity (RH) within a temperature range of 5 °C-85 °C. The system consists of a gas-flow-type humidity generator and a thermostatic sample chamber, each of which can independently control the temperature. The key features include rapid humidity response and long stable operation time. The humidity reaches equilibrium within 2 to 5 min during the humidity change, and the system exhibited acceptable stability over a three-day, nonstop experimental measurement duration, with a precision of ±1% RH at 85 °C and 85% RH. The sample chamber is capable of measuring substrate samples with dimensions of up to 2-in. in diameter and 5-mm in thickness. We demonstrate the reflectivity data measured at a pulsed neutron facility, MLF BL17, in the Japan Proton Accelerator Research Complex. The combined use of this system with neutrons permits in situ, time-resolved studies of the swelling process of polyvinyl alcohol and adhesive materials.
我们基于双向气流法开发了一种用于中子反射率测量的新型湿度控制系统，该系统在5°C至85°C的温度范围内可产生高达85%的相对湿度（RH）。该系统由气流式湿度发生器和恒温样品室组成，二者均可独立控制温度。其关键特性包括快速的湿度响应和较长的稳定运行时间。在湿度变化过程中，湿度在2至5分钟内达到平衡，并且在为期三天的不间断实验测量期间，该系统表现出可接受的稳定性，在85°C和85%RH条件下精度为±1%RH。样品室能够测量直径达2英寸、厚度为5毫米的基底样品。我们展示了在日本质子加速器研究中心的脉冲中子设施MLF BL17上测得的反射率数据。该系统与中子结合使用，能够对聚乙烯醇和粘合剂材料的溶胀过程进行原位、时间分辨研究。
