Technical Design Report Super Fragment Separator

DRAFT
To fulfill the required field quality over the whole range of operation from 0.15 to 1.6 T air slots
were introduced in the pole shoes. Their location is listed in Table 2.4.12. The air slots are not
symmetrical with respect to the magnet center.
Table 2.4.12: Coordinates of the air slots corners.
air slot left side air slot right side
x [m] y [m] x [m] y [m ]
4.195 0.185 4.465 0.185
4.195 0.195 4.465 0.195
4.245 0.195 4.515 0.195
The coils have a dimension of 40 mm × 40 mm and their position is given by the coil center coordinates,
which are:
left side coil: xl = 3.615 m, yl = 0.17 m
right side coil: xr = 5.100 m, yr = 0.17 m
The maximum current density in the coil is 104 A/mm 2 .
Figure 2.4.37 illustrates the field properties of the magnet for different B-values. Especially for
low B-field values - but also for very high B-field values - the design has to be further improved to
fulfill the field specifications. In principle the field quality may be improved by:
• introducing a gap between the yoke and the pole (Purcell filter);
• correcting coils on the pole surface.
The maximum field in the coil area is 1.9 T. The load line for the magnet is shown in Figure 2.4.38
and Table 2.4.13.
Figure 2.4.37: Field distributions in the cross section of the Energy Buncher dipole magnet.
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