The Danish Josephson array voltage calibration system

Author

Holtoug, J.U. ; Mygind, J.

Author_Institution

Danish Inst. of Fundamental Metrol., Lyngby, Denmark

fYear

1990

fDate

11-14 June 1990

Firstpage

114

Lastpage

115

Abstract

The Danish system for calibration of DC voltages up to 10 V is described. Emphasis is on the design and verification of the Josephson array setup and the certified scheme based on Zener references for dissemination of traceability to industry. To correct for offset and linear drift, three null measurements and two array voltage reversals are used in the calibration procedure. The uncorrected thermal voltages and drift originating mainly from the switch box are estimated to be about 1 nV. Calibration of the 10-V terminals is done by means of a high-linearity voltmeter. The nonlinearity of the voltmeter is the major source of error in the method.<>

Keywords

Josephson effect; calibration; measurement errors; measurement standards; superconducting junction devices; voltage measurement; 10 V; DC voltages; Danish Josephson array; array voltage reversals; error; linear drift; nonlinearity; null measurements; offset; thermal voltages; traceability; voltage calibration; voltmeter; Calibration; Design for manufacture; Frequency conversion; Josephson junctions; Metrology; Microwave oscillators; NIST; Stability; Voltage; Voltage-controlled oscillators;

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.1990.109949

Filename

109949