Temperature dependence performances of fully integrated DC SQUID magnetometers

Author

Granata, Carmine ; Monaco, Antonia ; Di Russo, C. ; Lissitski, Mikhail P. ; Russo, Cosmo Di

Author_Institution

Ist. di Cibernetica E. Caianiello, Consiglio Nazionale delle Ricerche, Pozzuoli, Italy

Volume

13

Issue

4

fYear

2003

Firstpage

3829

Lastpage

3832

Abstract

Temperature dependence of the main characteristics of integrated dc superconducting quantum interference device magnetometers based on niobium technology including an additional positive feedback circuit is reported. Temperatures above 4.2 K have been considered. A nonlinear temperature dependence of the spectral density of the field noise has been observed. The reported measurements show a slow increasing of the field noise up to temperatures of about 5 K, giving a considerable tolerance of the working temperature of niobium magnetometers in some innovative multichannel systems for magnetoencephalography.

Keywords

SQUID magnetometers; biomedical equipment; circuit feedback; frequency locked loops; magnetic noise; magnetoencephalography; superconducting device noise; 4.2 to 5 K; DC SQUID magnetometers; field noise; fully integrated magnetometers; magnetoencephalography; multichannel systems; mutual inductance; nonlinear temperature dependence; positive feedback circuit; readout electronics; spectral density; Feedback circuits; Integrated circuit technology; Interference; Magnetic field measurement; Niobium; Noise measurement; SQUID magnetometers; Superconducting device noise; Superconducting devices; Temperature dependence;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.816204

Filename

1255494