基于PPMS测试系统的低温温度计标定研究  

Calibration system for cryogenic thermometers based on PPMS system

作　　者：吴萌 方志春 王春栋 张涛[1] 信纪军 王维 李来风 Wu Meng;Fang Zhichun;Wang Chundong;Zhang Tao;Xin Jijun;Wang Wei;Li Laifeng(Guangzhou University,Guangzhou 511400,China;Songshan Lake Materials Laboratory,Dongguan 523429,China;Key Laboratory of Cryogenic Engineering,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Future Technology,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]广州大学,广州511400 [2]松山湖材料实验室,东莞523429 [3]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [4]中国科学院大学未来技术学院,北京100049

出　　处：《低温工程》2022年第6期13-17,25,共6页Cryogenics

基　　金：低温强磁场综合物性测量仪的系统设计、集成和验证(2020YFF01014704);广东省基础与应用基础研究基金(2020B1515120084,2021A1515110299)。

摘　　要：基于无液氦综合物性测量系统(PPMS)搭建了一套3—300 K温区的低温温度计标定系统。利用PPMS提供的低温环境,用Cernox-1030温度计作为标准温度计,对碳电阻温度计进行了标定。结果表明,该标定系统可以实现在3—300 K全范围内的低温温度计标定功能,且能通过编程自动对特定温区进行指定温度间隔标定。基于低温系统和数据采集系统的高度集成,实现了对标定不确定性的量化研究,得到该标定系统在3—7 K温区的标定误差为±8.38 mK,相比基于G-M制冷机的低温标定系统(标定误差约为20 mK)提高了标定精度。A cryogenic thermometer calibration system for the temperature range of 3-300K was built based on physical property measurement system(PPMS).With the cryogenic environment provided by the PPMS DynaCool system,a Cernox-1030 thermometer was used as the standard thermometer to calibrate the carbon resistance thermometer.The results show that the calibration system can realize the calibration function of cryogenic thermometers in the full range of 3~300K,and can be programmed to calibrate specific temperature zones at specified temperature intervals automatically.Based on the high integration of the cryogenic system and the data acquisition system,the calibration uncertainty is quantified and the calibration error of the calibration system in the temperature range of 3-7K is±8.38 mK,which improved the calibration accuracy compared with the G-M cryocooler-based cryogenic calibration system,whose calibration error is about 20 mK.

关 键 词：低温温度计标定 PPMS系统 温度测量 标定精度 

分 类 号：TB663[一般工业技术—制冷工程]