Title :
Evaluation of a high-performance magnetically shielded room for biomagnetic measurement
Author :
Harakawa, Ken-ichi ; Kajiwara, Gyo ; Kazami, Kunio ; Ogata, Hisanao ; Kado, Hisashi
Author_Institution :
Superconducting Sensor Lab., Inzai, Japan
fDate :
11/1/1996 12:00:00 AM
Abstract :
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
Keywords :
SQUID magnetometers; biomagnetism; biomedical measurement; magnetic shielding; magnetic variables measurement; COSMOS; DC-superconducting quantum interference device; biomagnetic measurement; faint magnetic fields; magnetically shielded room; shielding factor; signal-to-noise ratio; Aluminum; Biomagnetics; Laboratories; Magnetic field measurement; Magnetic materials; Magnetic shielding; SQUIDs; Superconducting coils; Superconducting magnets; Superconducting materials;
Journal_Title :
Magnetics, IEEE Transactions on
