  ANKA is a 2.5 GeV synchrotron radiation storage ring under construction at
the Forschungszentrum Karlsruhe in Germany. The injector system will consist of
a pre-injector with an end energy of 20 to 50 MeV and a 0.5 GeV booster
synchrotron. In the following three different concepts for designing the
booster synchrotron are compared.
