CRYOGENIC CURRENT COMPARATOR FOR THE MEASUREMENT OF ELECTRICAL RESISTANCE IN THE RANGE OF 10 kΩ} TO 1 GΩ}

Published

October 29, 2010

Author(s)

Felipe Hernandez-Marquez, Randolph Elmquist, Benjamin Rodriguez

Abstract

The development of measurement systems of electrical resistance based on the principle of current comparison in the late 1960s [1] has provided some of the best ways to achieve very low measurement uncertainties in the range of 1 Ω to 10 kΩ. Examples of this principle are seen in the commercial versions of current comparator resistance bridges operating at room temperature. Superconducting materials and their application as magnetic shields and in the development of low temperature instrumentation have allowed the development of cryogenic current comparators (CCC) that have greatly surpassed the measurement capabilities of current comparators operated at room temperature [2, 3]. This paper presents a new CCC, developed in a collaboration between the National Institute of Standards and Technolgy (NIST) of the USA, the National Measurement Institute (NMI) of Australia, the Instituto Nacional de Tecnología Industrial (INTI) of Argentina and the Centro Nacional de Metrología (CENAM) of Mexico. The CCC we describe is designed to measure resistance values in the range of 10 kΩ to 1 GΩ [4].

Proceedings Title

Simposio de Metrología 2010

Conference Dates

October 27-29, 2010

Conference Location

Queretaro, MX

Pub Type

Conferences

Keywords

Electrical Resistance, quantum Hall effect, cryogenic current comparator

Citation

Hernandez-Marquez, F. , Elmquist, R. and Rodriguez, B. (2010), CRYOGENIC CURRENT COMPARATOR FOR THE MEASUREMENT OF ELECTRICAL RESISTANCE IN THE RANGE OF 10 k{Ω} TO 1 G{Ω}, Simposio de Metrología 2010, Queretaro, MX (Accessed December 1, 2024)