SQUIDs – Highly sensitive magnetic sensors

Superconducting Quantum Interference Devices (SQUIDs) are the world's most sensitive detectors of magnetic signals. Besides their use in the laboratory, they have a rich application potential in areas such as geophysics, biomagnetism and nondestructive testing of materials. A programme for the...

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Bibliographic Details
Published in:Current science (Bangalore) 1999-09, Vol.77 (6), p.759-769
Main Authors: Janawadkar, M. P., Baskaran, R., Saha, Rita, Gireesan, K., Nagendran, R., Vaidhyanathan, L. S., Jayapandian, J., Radhakrishnan, T. S.
Format: Article
Language:English
Subjects:
Direct current
Electric current
Electric potential
GENERAL ARTICLES
Josephson junctions
Magnetic fields
Magnetic flux
Narrative devices
Sensors
Signal noise
Squid
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Summary:Superconducting Quantum Interference Devices (SQUIDs) are the world's most sensitive detectors of magnetic signals. Besides their use in the laboratory, they have a rich application potential in areas such as geophysics, biomagnetism and nondestructive testing of materials. A programme for the indigenous development of SQUID devices has been undertaken at the Indira Gandhi Centre for Atomic Research, Kalpakkam; high quality Josephson junctions, SQUID devices and large arrays of Josephson junctions have been successfully fabricated as a result of this effort. With the development of a low field SQUID magnetometer, the programme is poised to promote the indigenous development of SQUID based instruments for many applications. (Examples include ndt for ship plates.)
ISSN:0011-3891