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Evaluation of a high-performance magnetically shielded room for biomagnetic measurement

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5 Author(s)
Harakawa, K. ; Superconducting Sensor Lab., Inzai, Japan ; Kajiwara, G. ; Kazami, K. ; Ogata, H.
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A spherical magnetically shielded room called COSMOS and a method for measuring the shielding factor of well-shielded rooms have been developed. A dc-superconducting quantum interference device is used to detect faint magnetic fields, and the detected signals are averaged to increase the signal-to-noise ratio. The measured magnetic shielding factor for COSMOS is 420000 at 1 Hz

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Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 6 )