Technical Design Report Super Fragment Separator

DRAFT
Main-Separator to the high-energy experimental area
The High-Energy Branch allows experiments with fast secondary beams up to Bρmax of 20 Tm. It
combines the in-flight separator with an efficient reaction setup, see Figure 2.4.1 and Figure 2.4.10.
The compact design will overcome the problem of low transmission of the present FRS to the
experimental areas (in the SIS18 Target Hall) caused by long transport lines and beam-line magnets
designed only for primary beams with small emittances.
Figure 2.4.10: Ion optical layout of the High-Energy-Branch of the Main-Separator. Shown are the envelopes
of a 40 π mm mrad beam in x direction (upper half), y direction (lower half) and the dispersion for a
2.5 % momentum deviation (dashed line). The main optical properties are given in Table 2.4.3.
Main-Separator to the storage rings
Of special importance is the Ring Branch which consists of a storage-cooler ring system. Fragment
pulses as short as 50 ns are injected into the Collector Ring (CR) at rigidities of up to 13 Tm. The
main task of the CR is to efficiently collect and stochastically pre-cool the hot fragment beams.
Figure 2.4.11: Ion optical layout of the Ring-Branch of the Main-Separator. Shown are the envelopes of a 40
π mm mrad beam in x direction (upper half), y direction (lower half) and the dispersion for a 2.5 % momentum
deviation (dashed line).
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