injection septum is used to inject the beam of the linear accelerator UNILAC into the ring accelerator SIS18. This is a so-called "multiturn injection", meaning, that the ring is not filled in one but in many [...] Helmholtzzentrum für Schwerionenforschung GmbH This is possible by special ion-optical settings of the SIS18. Through the septum, the already orbiting beam flies through a hollow anode construction, while the [...] there, 80 kV / cm can be used. © Foto: GSI Helmholtzzentrum für Schwerionenforschung GmbH Also in the SIS100 there will be an electrostatic extraction septum. Due to the increased bending stiffness of the