Title :
Progress on flux measurement with Josephson system at NIM
Author :
Zengmin Wang ; Yuan Gao ; Honghui Li
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
Abstract :
A new record of magnetic flux measurement of 1 Wb with the type A uncertainty of less than 1 ppm was presented, which is an improvement over the result that was achieved with our previous magnetic flux measurement circuit with Josephson system. The flux difference measured between the rectangular pulse synthesized with the Josephson system and the flux under test (around 1 Wb) is less than 4 mWb, which significantly reduces the impact of the flux meter reading error on the measurement results.
Keywords :
Josephson effect; fluxmeters; magnetic flux; magnetic variables measurement; measurement errors; measurement uncertainty; Josephson system; NIM; flux meter reading error; magnetic flux measurement circuit; measurement error; measurement uncertainty; rectangular pulse synthesis; Coils; Current measurement; Inductance; Inductance measurement; Magnetic flux; Measurement uncertainty; Pulse measurements; Flux measurement; Josephson voltage standard; Mutual inductance;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898455
