Tesla/volt calibration method for integrated planar SQUID gradiometers

Author

Bruno, A.C.

Author_Institution

Dept. de Fisica, Pontificia Univ. Catolica do Rio de Janeiro, Brazil

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

2760

Lastpage

2763

Abstract

A calibration method for integrated planar SQUID gradiometers is proposed based on a spatial Fourier technique and on the fact that each gradiometer design has its own theoretical spatial transfer function. The calibration consists in scanning the gradiometer over a known input field source and measuring the output voltage values. The measured transfer function is the result of the division of the Fourier transform of the output signal by the Fourier transform of the input signal. The calibration factor is obtained by fitting the measured transfer function with the theoretical one. The experimental procedure was simulated and calibration factors with imprecision of about 0.2% are expected in actual measurements.

Keywords

Fourier transforms; SQUID magnetometers; calibration; transfer functions; Fourier transform; calibration factor; input field source; output voltage values; planar SQUID gradiometers; spatial Fourier technique; spatial transfer function; tesla/volt calibration method; Calibration; Coils; Frequency; Position measurement; SQUIDs; Sampling methods; Signal generators; Transfer functions; Voltage measurement; Wires;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621809

Filename

621809