免液氦量子电压标准低温系统设计与研究

doi:10.3969/j.issn.1000-1158.2023.09.06

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摘要提出一种免液氦量子电压标准低温系统,给出了设计和结构,详细分析了10K左右NMIJ结阵的结构和超导特性。实验结果表明,设计和研制的免液氦量子电压标准低温系统,能够较好地为NMIJ约瑟夫森结阵提供10K左右低温环境,测得的临界电流和超导量子电压台阶宽度满足结阵超导特性使用要求,为下一步直流量子电压的准确输出奠定了基础。

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	王曾敏
	李红晖
	廖福剑
	贾正森
	徐晴
	田正其
	段梅梅
	王磊

关键词 ：计量学, 免液氦量子电压标准, 约瑟夫森低温恒温器, 超导量子电压

Abstract：To propose a domestic liquid helium free DC programmable Josephson voltage standard (PJVS) operating on a cryocooler around 10K. The design and structure of the cryogenic system of liquid helium free quantum voltage standard are presented. The structure of NMIJ array at around 10K temperature are analyzed in detail. The experimental results show that the liquid helium free quantum voltage standard cryogenic system can provide stable temperature for NMIJ Josephson junction array, and the measured critical current and the quantum voltage step width meet the requirements of superconducting characteristics of the junction array. The research lays an important foundation for the accurate liquid helium free DC quantum voltage output in the next step.

Key words： metrology cryocooled Josephson voltage standard cryostat designed for Josephson array chip quantum voltage

收稿日期: 2021-09-23 发布日期: 2023-09-21

PACS:

TB971

基金资助:国家电网公司科技项目(5700-202018170A-0-0-00)

作者简介: 王曾敏(1981-),新疆石河子人,中国计量科学研究院副研究员,从事量子电压基标准及其应用方面的研究。Email:wangzm@nim.ac.cn

引用本文:

王曾敏,李红晖,廖福剑,贾正森,徐晴,田正其,段梅梅,王磊. 免液氦量子电压标准低温系统设计与研究[J]. 计量学报, 2023, 44(9): 1352-1359.
WANG Zeng-min,LI Hong-hui,LIAO Fu-jian,JIA Zheng-sen,XU Qing,TIAN Zheng-qi,DUAN Mei-mei,WANG Lei. Research on cryocooled programmable Josephson voltage standard and its cryostat. Acta Metrologica Sinica, 2023, 44(9): 1352-1359.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2023.09.06 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2023/V44/I9/1352

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