Technical Design Report Super Fragment Separator

DRAFT
Figure 2.4.7: Upper figures: Calculated phase space in the dispersive focal plane PF2 for a beam of 40 mm
mrad and three different momenta of ∆p/p = ±2.5 % with (blue distributions) and without (red distributions)
correction of image aberrations. Lower figurel: Corresponding phase space in the achromatic focal plane
PF4.
Main-Separator
The Main-Separator consists of four dipole stages with focusing elements in front and behind each
dipole magnet system. The 29-degree dipole magnets are divided in 3 parts to facilitate the production
of the iron-dominated superconducting magnets. The ion-optical design of the
Main-Separator closely follows the concept applied for the Pre-Separator. However, the radiation
level in this part of the Super-FRS is about two orders of magnitude lower because the primary
beam and the non-desired fragments are deposited in the Pre-Separator. The Main-Separator has
also four focal planes to accommodate an achromatic system with a degrader station in the central
focal plane. The Main-Separator has three experimental branches to different experimental areas.
The characteristic features are outlined for the example of the High-Energy-Branch. This branch
has the advantage of a symmetrical geometry and therefore, the potential for the highest ion-optical
resolution and transmission. The most relevant ion-optical properties can be deduced from the
first-order ion-optical matrix elements presented in Table 2.4.3.
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