Validation of the ultrastable low-noise current amplifier as travelling standard for small direct currents

被引：32

作者：

Drung, D. ^{[1
]}

Krause, C. ^{[2
]}

Giblin, S. P. ^{[3
]}

Djordjevic, S. ^{[4
]}

Piquemal, F. ^{[4
]}

Seron, O. ^{[4
]}

Rengnez, F. ^{[4
]}

Goetz, M. ^{[2
]}

Pesel, E. ^{[2
]}

Scherer, H. ^{[2
]}

机构：

[1] Phys Tech Bundesanstalt, D-10587 Berlin, Germany

[2] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

[3] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[4] Lab Natl Metrol & Essais LNE, F-78197 Trappes, France

来源：

METROLOGIA | 2015年 / 52卷 / 06期

关键词：

amplifiers; calibration; electric current measurement; measurement units and standards; resistance measurement; superconducting devices; AMPERE;

D O I：

10.1088/0026-1394/52/6/756

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An interlaboratory comparison of small-current generation and measurement capability is presented with the ultrastable low-noise current amplifier (ULCA) acting as travelling standard. Various measurements at direct currents between 0.16 nA and 13 nA were performed to verify the degree of agreement between the three national metrology institutes involved in the study. Consistency well within one part per million (ppm) was found. Due to harsh environmental conditions during shipment, the ULCA's transfer accuracy had been limited to about +/- 0.4 ppm. Supplemental measurements performed at PTB indicate that further improvements in accuracy are possible. Relative uncertainties of 0.1 ppm are achieved by applying on-site calibration of the ULCA with a suitable cryogenic current comparator.

引用

页码：756 / 763

页数：8