Progress in Superconductivity
- Volume 8 Issue 1
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- Pages.33-39
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- 2006
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- 1229-4764(pISSN)
Noise Characteristics of 64-channel 2nd-order DROS Gradiometer System inside a Poorly Magnetically-shielded Room
저성능 자기차폐실에서 64채널 DROS 2차 미분계 시스템의 잡음 특성
- Kim, J.M. (Bio-signal Research Center, Korea Research Institute of Standards and Science) ;
- Lee, Y.H. (Bio-signal Research Center, Korea Research Institute of Standards and Science) ;
- Yu, K.K. (Bio-signal Research Center, Korea Research Institute of Standards and Science) ;
- Kim, K. (Bio-signal Research Center, Korea Research Institute of Standards and Science) ;
- Kwon, H. (Bio-signal Research Center, Korea Research Institute of Standards and Science) ;
- Park, Y.K. (Bio-signal Research Center, Korea Research Institute of Standards and Science) ;
- Sasada, Ichiro (Department of Applied Science for Electronics and Materials, Kyushu University)
- Published : 2006.10.31
Abstract
We have developed a second-order double relaxation oscillation SQUID(DROS) gradiometer with a baseline of 35 mm, and constructed a poorly magnetically-shielded room(MSR) with an aluminum layer and permalloy layers for magnetocardiography(MCG). The 2nd-order DROS gradiometer has a noise level of 20