Magnetsystem

Magnet type

Permanent magnet in anti-eddycurrent   design

Magnet structure

Super opened (Ctype)

with vertical magneticfield

Magnetic material

NdFeB

Magnetic fieldstrength

0.3T ± 5%

Magnet weight

≤ 13 t

Opening angle

> 300°

Shimming

Passive shimming

Hamogeneity

<5 ppm at 40cm DSV(VRMS)

<2 ppm at 20cm DSV(FWHH)

Long term fieldstability

<0.1% for 6months

Magnet temperature

Fixed at 28°C byMHTCS   (magnet heating and temperature controlsub-system)

Magnetic shielding

Not necessary because of thefringe field   is very low

The distance from 5 gauss lineto the   center of magnet

x direction: <2.2 m

y direction:<1.6 m

z direction:<1.65 m

Patient space

400 ± 20 mm