Title :
Current dependence measurement of 1 Ω standard resistors using a cryogenic current source with linear output
Author :
Nakanishi, Masakazu ; Kinoshita, Joji ; Sakamoto, Yasuhiko ; Endo, Tadashi
Author_Institution :
Div. of Metrol. Fundamentals, Electrotech. Lab., Ibaraki, Japan
fDate :
4/1/2001 12:00:00 AM
Abstract :
We have developed a cryogenic current source with linear output up to 1 A, by combining a 1 mA current source with a cryogenic current comparator operating as a current amplifier. This source was used, along with a 1 V Josephson potentiometer, to determine the current dependence of two types of 1 Ω resistors
Keywords :
calibration; current comparators; electric resistance measurement; low-temperature techniques; measurement standards; measurement uncertainty; resistors; 1 ohm; Josephson junction array voltage standard; Josephson potentiometer; SQUID; calibration; cryogenic current comparator; cryogenic current source; current amplifier; current dependence measurement; linear output; relative uncertainty; resistance standard; standard resistors; Coils; Cryogenics; Current measurement; Fluctuations; Magnetic flux; Measurement standards; Potentiometers; Resistors; SQUIDs; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
