2016_Imaging for Physicists

Example Specifications

Shielding

Passive and active

Homogeneity (ppm)

0.2 (40 cm DSV)

Field stability (ppm/hr)

<0.1

Cooling

Liquid helium only

Magnet specifications for Siemens Avanto 1.5 T

Boil-off (l/hr)

0

Helium refill Shim plates

10 years 16 x 15

Active shim

3 linear terms (20 coils) 5 2 nd order (32 coils)

Mass (tonnes)

5.5

Radial (x,y) 5 Gauss

2.5

Axial (z) 5 Gauss

4.0

Minimum area (m 2 )

<30