Superconducting quantum interference magnetometer for large multichannel systems with low crosstalk level (Articolo in rivista)

Type
Label
  • Superconducting quantum interference magnetometer for large multichannel systems with low crosstalk level (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Vettoliere A. , Granata C. , Ruggiero B. and Russo M. (2009)
    Superconducting quantum interference magnetometer for large multichannel systems with low crosstalk level
    in International journal of modern physics b
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Vettoliere A. , Granata C. , Ruggiero B. and Russo M. (literal)
Pagina inizio
  • 5759 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 23 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Cibernetica \"E. Caianiello\" (literal)
Titolo
  • Superconducting quantum interference magnetometer for large multichannel systems with low crosstalk level (literal)
Abstract
  • Magnetometers based on Superconducting Quantum Interference Device (SQUID) are widely employed in high sensitivity magnetometry. In particular, new multichannel sys- tems for biomagnetic applications require many sensors which are very close to each other giving the crosstalk disturbance between the neighboring channel. Here, we present ex- perimental results about a fully integrated dc-SQUID magnetometer, based on niobium technology, having a suitable design which allows to reduce crosstalk due to both the feedback coil and wires. The crosstalk level measurements relative to a particular arrangement of sensors are reported. In such configuration, four magnetometers are placed over a square board 30 mm in side with a distance between their sensor centers of 14 mm. The measurements have been performed in a 4 He cryostat at T = 4.2 K in a flux-locked loop configuration using a readout electronics with a direct coupled scheme. The experimental data have shown a substantial reduction of crosstalk among neighboring sensors with respect to a traditional feedback coil. Furthermore, the field noise measurements have ensured that the new pickup and feedback coils design does not introduce any noise level degradation. (literal)
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