Title :
Measurement of thermoelectric effects in a thermal converter using a NbN/TiN/NbN Josephson junction array
Author :
Sasaki, Hitoshi ; Yamamori, Hirotake ; Fujiki, Hiroyuki ; Takahashi, Kunihiko ; Shoji, Akira
Author_Institution :
Nat. Inst. of Adv. Ind. Sci. & Technol., Ibaraki, Japan
fDate :
4/1/2003 12:00:00 AM
Abstract :
The AC-DC transfer difference due to thermoelectric effects in a thermal converter was evaluated using a NbN/TiN/NbN Josephson junction array as an ultra-stable fast-reversed DC (FRDC) source. The Josephson junction array was connected in parallel with a conventional semiconductor FRDC current source, as an "add-on" voltage-stabilizer for the input of the thermal converter. The AC-DC difference due to thermoelectric effects was evaluated with a standard measurement (type-A) uncertainty of the order of 0.01 μV/V, four-times better than that with the conventional semiconductor FRDC source.
Keywords :
AC-DC power convertors; niobium compounds; superconductor-insulator-superconductor devices; thermoelectric conversion; thermoelectric devices; thermoelectricity; titanium compounds; transfer standards; type II superconductors; voltage measurement; voltage regulators; AC-DC transfer difference; NbN-TiN-NbN; NbN/TiN/NbN Josephson junction array; add-on voltage-stabilizer; parallel semiconductor FRDC current source; thermal converter; thermoelectric effects measurement; type-A standard measurement uncertainty; ultra-stable fast-reversed DC source; Analog-digital conversion; Josephson junctions; Measurement standards; Microwave antenna arrays; Microwave frequencies; NIST; Niobium; Thermoelectricity; Tin; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2003.810720
