| 摘要 |
PROBLEM TO BE SOLVED: To form a magnetic shield space where air is freely distributed at a low cost without using a magnetic shielding body and to set the magnetic field of the magnetic shield space to be minimum at all times. SOLUTION: A coil 2 is wound around the entire magnetic shield space 1, the magnetic shield space is installed so that the axis of the coil is coaxial with the direction of an external magnetic field, a current is made to flow to the coil, and the magnetic field which cancels the external magnetic field is generated. Thus, the space of a low magnetic field is formed inside the magnetic shield space. COPYRIGHT: (C)2005,JPO&NCIPI
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