Title :
Cryogenic current comparator for QHR determination at NML
Author :
Small, G.W. ; Leslie, K.E. ; Ricketts, B.W. ; Coogan, P.C.
Author_Institution :
Div. of Appl. Phys., CSIRO, Lindfield, NSW, Australia
fDate :
June 27 1994-July 1 1994
Abstract :
A cryogenic current comparator is being developed at NML to give high accuracy comparisons of room temperature resistors and quantized Hall resistances. The comparator incorporates novel developments in the method of calibrating auxiliary currents and in the method of construction of the superconducting shielding around the comparator windings.<>
Keywords :
calibration; comparators (circuits); electric resistance measurement; low-temperature techniques; quantum Hall effect; resistors; windings; NML; auxiliary currents; calibration; comparator windings; cryogenic current comparator; quantized Hall resistances; room temperature resistors; superconducting shielding; Bridge circuits; Calibration; Cryogenics; Current measurement; Detectors; Electrical resistance measurement; Laboratories; Resistors; SQUIDs; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333256
