c SQUIDs, being developed in mid 1990s, were used for magnetocardiography and nondestructive evaluation. Recently, SQUID-based low-field nuclear magnetic resonance technology is under development. In this paper, we review the past progress and recent activity of SQUID applications in Korea, with focus on biomagnetic measurements." />
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Development and Applications of SQUIDs in Korea

Yong-Ho LEE
Hyukchan KWON
Jin-Mok KIM
Kiwoong KIM
Kwon-Kyu YU
In-Seon KIM
Chan-Seok KANG
Seong-Joo LEE
Seong-Min HWANG
Yong-Ki PARK

Publication
IEICE TRANSACTIONS on Electronics   Vol.E96-C    No.3    pp.307-312
Publication Date: 2013/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E96.C.307
Print ISSN: 0916-8516
Type of Manuscript: Special Section INVITED PAPER (Special Section on SQUID & its Applications)
Category: 
Keyword: 
SQUID,  magnetocardiography,  magnetoencephalography,  low-field nuclear magnetic resonance,  

Full Text: FreePDF(2.9MB)
Summary: 
As sensitive magnetic sensors, magnetometers based on superconducting quantum interference devices can be used for the detection of weak magnetic fields. These signals can be generated by diverse origins, for example, brain electric activity, myocardium electric activity, and nuclear precession of hydrogen protons. In addition, weak current induced in the low-temperature detectors, for example, transition-edge sensors can be detected using SQUIDs. And, change of magnetic flux quantum generated in a superconducting ring can be detected by SQUID, which can be used for realization of mechanical force. Thus, SQUIDs are key elements in precision metrology. In Korea, development of low-temperature SQUIDs based on Nb-Josephson junctions was started in late 1980s, and Nb-based SQUIDs have been used mainly for biomagnetic measurements; magnetocardiography and magnetoencephalography. High-Tc SQUIDs, being developed in mid 1990s, were used for magnetocardiography and nondestructive evaluation. Recently, SQUID-based low-field nuclear magnetic resonance technology is under development. In this paper, we review the past progress and recent activity of SQUID applications in Korea, with focus on biomagnetic measurements.