R&D and Engineering Studies for the SIS100 Extraction System

Due to the large magnetic rigidity of the SIS100 beam, the maximum achievable septum angle and the distance of the deflected beam to the edge of the circulating beam is rather small (3 mrad and 11mm). On the other hand, the extracted beam has to bypass the next quadrupole magnet with an angle of 3 1/3 deg. In fact, this large total deflection angle can be realized with three magnetic septa. Since the gap between two neighbouring s.c. quadrupole units is quite short, the integration of the resonance sextupole magnet, three magnetic septa and the internal beam dump in such a cell is challenging.