Technical Design Report Super Fragment Separator

∆B/B
0.0
DRAFT
Figure 2.4.46: Average field gradient distribution along the border of an elliptical aperture of ± 0.19 m ×
±0.10 m (colour code: black full line indicates gradient g = 5.6 T/m, red dashed line g = 7.7 T/m, green
dashed line g = 8.7 T/m).
Harmonic amplitude, 10 -4 rel. units
90
80
70
60
50
40
30
20
10
0
0.1 R [m]
0.2
6
10
14
0 2 4 6 8 10
Average field gradient, T/m
Figure 2.4.47: Field harmonics along a circle of 190 mm radius in the quadrupole magnets.
Figure 2.4.48 shows a 3D view of the quadrupole magnet and the main coils. 3D calculations
indicate that the effective length of the magnet is approximately 76 mm longer than the iron yoke
length for a 800 mm long magnet and 72 mm longer for a 1200 mm long magnet. To correct the
field integral distribution end chamfers were added using the geometry shown in Figure 2.4.49.
47