Title :
Single-Chip 10-V Programmable Josephson Voltage Standard System Based on a Refrigerator and Its Precision Evaluation
Author :
Yamada, Takahiro ; Urano, Chiharu ; Nishinaka, Hidefumi ; Murayama, Yasushi ; Iwasa, Akio ; Yamamori, Hirotake ; Sasaki, Hitoshi ; Shoji, Akira ; Nakamura, Yasuhiro
Author_Institution :
Nanoelectron. Res. Inst., Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba, Japan
Abstract :
We precisely evaluated a single-chip 10-V programmable Josephson voltage standard (PJVS) system based on a closed-cycle refrigerator by directly comparing it with a conventional Josephson voltage standard system. The PJVS chip fabricated using NbN/TiNx/NbN junction technology was used. The result of the measurement showed a good agreement with a combined standard uncertainty of 3.1 parts in 1010 at 10 V.
Keywords :
niobium compounds; refrigerators; superconductor-insulator-superconductor devices; titanium compounds; Josephson junctions; NbN-TiNx-NbN; PJVS chip; closed-cycle refrigerator; single-chip programmable Josephson voltage standard system; voltage 10 V; Cryogenic electronics; Josephson junctions (JJs); uncertainty; voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2009.2033939
