Establishment of Josephson array voltage standard system at KSRI

Author

Kim, K.T. ; Kim, I.S. ; Cho, Y.M. ; Lee, R.D. ; Park, J.C.

Author_Institution

Korea Stand. Res. Inst., Taejon, South Korea

fYear

1990

fDate

11-14 June 1990

Firstpage

100

Lastpage

101

Abstract

A Josephson array voltage standard system that is used to maintain the national standard of voltage in Korea according to the CIPM recommendation is described. The standard, which consists of a microwave source, electronics, and a cryogenic unit was constructed using a 2076-junction array. Measurement shows that the mean value of EMF of the primary standard cell group differs from the expected value by 9.8 p.p.m. if the new Josephson constant, K/sub J-90/ =483597.9 GHz/V, is used to calculate the array voltage. The difference originates mainly from the use of a different value of K/sub J/, and the resultant change of EMF of the cells is less than 0.6 p.p.m. in ten years.<>

Keywords

Josephson effect; measurement standards; superconducting junction devices; voltage measurement; 2076-junction array; CIPM; EMF; Josephson array voltage standard; Josephson constant; Korea; cryogenic; microwave source; national standard; primary standard cell; superconducting junction; Bars; Calibration; Detectors; Error correction; Insulation; Microwave antenna arrays; NIST; Switches; Uncertainty; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on

Conference_Location

Ottawa, Ontario, Canada

Type

conf

DOI

10.1109/CPEM.1990.109942

Filename

109942