Development of a HTS SQUID gradiometer system for the measurement of very weak magnetic field in an unshielded environment
비자기차폐환경에서 미세 자기장 측정을 위한 고온초전도 gradiometer 시스템의 개발
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Kim, In-Seon
(Korea Research Institiute of Standards and Science) ;
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Kim, Jin-Mok
(Korea Research Institiute of Standards and Science) ;
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Park, Yong-Ki
(Korea Research Institiute of Standards and Science)
- Published : 2000.08.16
Abstract
We have developed a YBCO SQUID gradiometer system for the measurement of a very weak magnetic field in an unshielded environment. The system consists of a SQUID gradiometer sensor, low noise pre-amp, and FLL(fluxlocked loop) control electronics. The gradiometer sensors have been fabricated on STO bicrystal substrates, and exhibit a magnetic noise of 300 fT/
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