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Comparison of a Multichip 10-V Programmable Josephson Voltage Standard System With a Superconductor–Insulator–Superconductor-Based Conventional System

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8 Author(s)
Yamada, T. ; Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba ; Murayama, Y. ; Yamamori, H. ; Sasaki, H.
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We developed a 10-V dc programmable Josephson voltage standard (PJVS) using a multichip technique. The PJVS was based on NbN/TiNx/NbN junctions and operated using a 10-K compact cryocooler. We carried out an indirect comparison with a superconductor-insulator-superconductor-based conventional Josephson voltage standard (JVS) by measuring the voltage of a 10-V zener diode reference standard. The combined standard uncertainty of the comparison was u c = 0.03 muV(k = 1), and the relative combined standard uncertainty was 3 times10-9.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:58 ,  Issue: 4 )