Title :
Towards a cheaper, simpler quantized Hall resistance standard
Author_Institution :
Inst. for Nat. Meas. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
We have produced and characterised devices suitable for accurate quantum Hall resistor (QHR) measurements at fields below 8 T, and temperatures of 1.2-1.5 K. We have made accurate comparisons of QHR devices with wirewound resistors using commercially available room-temperature dc current-comparator bridges. These two results imply that it is possible to assemble an accurate, but relatively cheap and simple to operate, QHR standard.
Keywords :
bridge circuits; current comparators; electric resistance measurement; measurement standards; quantum Hall effect; resistors; 1.2 to 1.5 K; 7.5 T; DC current-comparator bridges; accurate comparisons; accurate quantum Hall resistor measurements; commercial bridges; simpler quantized Hall resistance standard; uncertainty; wirewound resistors; Cryogenics; Current measurement; Electrical resistance measurement; Laboratories; Measurement standards; Resistors; Standards development; Superconducting magnets; Temperature; Tin;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.699939
