Technical Design Report Super Fragment Separator

DRAFT
Figure 2.4.114: Layout of the beam catchers positioned behind each 11° dipole magnet of the Super-FRS.
A more detailed view of the plug and beam catchers is given in Figure 2.4.115. Pillow seals will be
used at the entrance of the dipole magnet and behind the beam catcher where the aperture is small.
Radiation shielding is provided by the iron plug inside the vacuum chamber or by surrounding
concrete shielding. The beam catcher and a position sensitive detector are mounted moveable on a
rail and the corresponding motors are located on top of the plug.
Figure 2.4.115: Scheme of the technical layout of the beam catcher. Cut through the beam catcher and the
preceding dipole magnet.
For maintenance the beam catcher must be removed first into a shielding bottle and carried to a safe
deposit. As the dose rate with an iron bottle of 30 cm thickness at the critical regions reaches up to
10 µSv/h on the outside, it must be kept in an area with controlled access. A modification or
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