Technical Design Report Super Fragment Separator

DRAFT
The double ring synchrotrons, parts of the beam transfer lines and the Super-FRS include about
930 superconducting (sc) magnets working at an operation temperature of about 4.4 K. The
required temperature for the superconducting coils is achieved either by forced flow cooling with
liquid helium or by using liquid helium baths. Figure 2.4.148 gives an overviev of the site.
Synchrotrons
Storage Rings
Figure 2.4.148: Overview of the FAIR site.
Liquid helium will be generated by two refrigerators with a cooling power of 34 kW at 4.4 K. It is
distributed via vacuum insulated transfer lines to the feedboxes of the different helium users (e.g.
synchrotrons, beam line, Super-FRS), which are located all over the site. Table 2.4.33 gives a list of
the subprojects using superconducting magnets.
Additional helium cooling is required for the current leads, which connect the warm resistive
power cables with the superconducting bus bars at 4 K. About 60 current leads will be installed for
different nominal currents.
Table 2.4.33: Subprojects with cryogenic sections.
High Energy
Beam Transfer
Super Fragment
Separator
Subproject Numbers of sc magnets
SIS 100 430
SIS 300 277
HEBT 36
Super-FRS 185
MTF 10*
*) The sc magnets that will be tested in the magnet test facility (MTF) belong to the subprojects listed above in the
table.
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