Title :
Cryogenic current comparator designed for current dependence measurement of 1 /spl Omega/ resistor up to 1 A and for superconducting current measurement
Author :
Nakanishi, M. ; Kinoshita, J.
Author_Institution :
NMIJ, Nat. Inst. of Adv. Ind. Sci. & Technol., Ibaraki, Japan
Abstract :
We developed a cryogenic current comparator, to which currents of up to 1 A can be supplied. It was designed to be used for a resistance ratio bridge to measure current dependence of a 1 /spl Omega/ resistor from 50 mA to 1 A by comparing it to a 100 /spl Omega/ resistor with small power coefficiency. It was also designed to be inserted in a superconducting coil to measure superconducting current.
Keywords :
SQUIDs; bridge circuits; current comparators; electric current measurement; resistors; superconducting coils; 1 ohm; 100 ohm; 50 mA to 1 A; SQUID; cryogenic current comparators; precision current measurement; resistance ratio bridge; resistor current dependence measurement; resistor power coefficiency; superconducting coil inserted comparator; superconducting current measurement; Bridge circuits; Cryogenics; Current measurement; Electrical resistance measurement; Equations; Resistors; SQUIDs; Superconducting coils; Virtual manufacturing; Voltage measurement;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034858
