基于SNS型双路约瑟夫森结阵驱动方法研究

doi:10.3969/j.issn.1000-1158.2020.03.04

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摘要根据SNS型双路约瑟夫森结阵的驱动原理以及结阵分段特点,提出了平衡三进制驱动算法,实现了双路约瑟夫森结阵偏置状态的快速计算。根据约瑟夫森结阵的偏置状态以及组合方式,采用节点电压法,准确合成了双路阶梯波交流量子电压的台阶电压值,最终实现了最小分辨率为2个结,有效位为15位的交流量子电压输出。双路交流量子电压互测实验结果表明,合成交流量子电压的最大误差为0.06 μV,双路信号同步性测试实验中,两个通道的相位差为-0.01 μrad,证明了合成双路交流量子电压具有较高的幅值准确度和相位同步性。

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	周天地
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	徐熙彤
	潘仙林
	石照民

关键词 ：计量学, 量子电压, SNS型双路约瑟夫森结阵, 平衡三进制, 节点电压法

Abstract：According to the driving principle of SNS type two-way Josephson junction and the segmentation characteristics of the array, a balanced ternary driving algorithm was proposed to realize the fast calculation of the bias state of the two-way Josephson junction array.According to the bias state and combination of Josephson junction array, the voltage value of the two-way step wave AC quantum voltage was accurately synthesized by using the node voltage method.Finally, AC quantum voltage output with a minimum resolution of 2 knots and a valid bit of 15 bits was realized.The results of two-way AC quantum voltage mutual test showed that the maximum error of the synthesized AC quantum voltage was 0.06μV, and the phase difference between the two channels was 0.02μrad, which proved that the synthesized two-way AC quantum voltage has high amplitude accuracy and good phase synchronization.

Key words： metrology quantum voltage SNS type two-way Josephson junction array balanced ternary node voltage method

PACS:

TB971

基金资助:国家高科技研究发展计划(2015AA050404);国家自然科学基金(51877202)

通讯作者: 贾正森(1986-),男,中国计量科学研究院副研究员,博士,从事交流电量检测技术、电能性能及交流量子功率差分测量技术研究。Email:jiazs@nim.ac.cn

作者简介: 周天地(1995-),男,中国计量科学研究院硕士研究生,研究方向为约瑟夫森量子电压系统以及交流量子功率差分测量技术。Email:531201908@qq.com

引用本文:

周天地,贾正森,王磊,徐熙彤,潘仙林,石照民. 基于SNS型双路约瑟夫森结阵驱动方法研究[J]. 计量学报, 2020, 41(3): 290-295.
ZHOU Tian-di,JIA Zheng-sen,WANG Lei,XU Xi-tong,PAN Xian-lin,SHI Zhao-min. Division of Electricity and Magnetism, National Institute of Metrology, Beijing 100029, China. Acta Metrologica Sinica, 2020, 41(3): 290-295.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2020.03.04 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2020/V41/I3/290

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