噺紫社鯵

Magnetic Shield Facilities

When you install various fine tuning analyzer, which controls electric beam without any protection to the interference of magnetic field, it may cause a change of color, malfunction, or distortion.

Cases	Install environment	Description	ETC
Color changes and malfunction	TV monitor near railroad side	no color changes or changes when a train passes and color changes when a train does not pass	300mG
	TV monitor, computer inside of train station	color changes or unstable data transmission during departure or arrival of train	300mG
	E-beam and SEM facilities in E-beam room	Influence of rapid magnetism such as .	2mG
Distortion	TV monitor near power cable	consistent distortion	5mG
	TV monitor near electric products	consistent distortion
	0.5T below permanent MRI	visual distortion by intermittent direct magnetic field in vehicles and elevator
Body effect	over 1.5T superconductivity MRI	Pace-maker holder is under influence of exposed magnetic field	5G

The solution of magnetic shield

Changing the route of magnetic field with the magnetic material of high permeability and low coercive force prevents the intrusion and release of unnecessary magnetism.

∈ Effect of shield

∈ properties of magnetic shield

Magnetic field
Classify

Material Properties

first magnetic
permeability
(B₄₀)

reserved
magnetic
energy
(Hc)

レз/Н

Effect of shield

Hout/Hin

dB

Low Magnetic Shield

20,000

0.057

2 ×10^-2

87.5 ×10³

98.8

High Magnetic Shield

15,000

0.17

50 ×10^-6

5 ×10³

97.5

Vastness Shield

20,000

0.0057

3 ×10^-6

92.1 ×10³

99.2