| 摘要 |
PROBLEM TO BE SOLVED: To suppress reduction in shield factor due to magnetization in magnetic shield having a multilayer structure.SOLUTION: A magnetic shield device 10 includes: a shield part having a first cylinder constructed of a magnetic material and a second cylinder disposed in a hollow of the first cylinder and constructed of the magnetic material; and a first demagnetization part which demagnetizes the first cylinder; and a second demagnetization part which demagnetizes the second cylinder. |
