Construction and Operation of a 40-channel SQUID System for Neuromagnetic Measurements
40-채널 SQUID 시스템의 제작 및 뇌자도 측정
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Lee, Yong-Ho
(Korea Research Institute of Standards and Science) ;
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Kim, Jin-Mok
(Korea Research Institute of Standards and Science) ;
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Kwon, Hyuk-Chan
(Korea Research Institute of Standards and Science) ;
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Lee, Sang-Kil
(Korea Research Institute of Standards and Science) ;
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Lim, Cheong-Moo
(Korea Research Institute of Standards and Science) ;
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Park, Yong-Ki
(Korea Research Institute of Standards and Science) ;
- Park, Jong-Chul (Korea Research Institute of Standards and Science)
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이용호
(한국표준과학연구원) ;
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김진목
(한국표준과학연구원) ;
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권혁찬
(한국표준과학연구원) ;
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이상길
(한국표준과학연구원) ;
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임청무
(한국표준과학연구원) ;
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박용기
(한국표준과학연구원) ;
- 박종철 (한국표준과학연구원)
- Published : 1999.08.18
Abstract
We developed a 40-channel superconducting quantum interference device (SQUID) system for neuromagnetic measurements. The main features of the system are use of double relaxation oscillation SQUID (DROS), and planar gradiometer for measuring tangential field components. The DROSS with high flux-to-voltage transfers enabled direct readout of the SQUID output by room-temperature electronics and simple flux-locked loop circuits could be used for SQUID operation. The pickup coil is an integrated first-order planar gradiometer with a baseline of 40 mm. The average noise of the 40 channels is around 1.2 fT/cm/
Keywords