The IH-7-gap resonators of the Munich Accelerator for Fission Fragments (MAFF) LINAC

The LINAC of the new Munich Accelerator for Fission Fragments (MAFF), which is currently under construction at the new high flux reactor FRM II, will deliver intense beams of neutron-rich fission fragments in order to produce new super-heavy elements with long half-times and to study r-process nuclei. The overall length of the LINAC is restricted to approximately 20 m. To reach energies at the Coulomb Barrier with such a short LINAC very effective acceleration is mandatory. To obtain the proposed final energies in the range of 3.7 MeV/u to 5.9 MeV/u, the ions are charge bred to A/q < 6.3 before acceleration and IH-structures with high shunt impedances and high effective accelerating fields are used for all LINAC components. The general concept of the LINAC and the IH-7-gap structures used to achieve the high flexibility in the end energies in particular is presented