Straight injection of an intense uranium beam into the GSI High Current RFQ

A dedicated high current uranium ion source and LEBT will be built at the GSI High Current Injector (HSI), to fulfil the intensity requirements for FAIR (Facility forAntiproton and Ion Research at Darmstadt). This new injection line will be integrated into the existingcomplex which already comprises two branches. The new LEBT is designed as a straight injection linewithout dipole magnet, i.e. without dispersive charge stateseparation. All uranium charge states, coming from theion source, are transported to the heavy ion high current GSI-HSI-RFQ. Only the design charge state U4+ is accelerated to the final RFQ energy. The new LEBT design is based on beam emittance and current measurements behind the existing ion source. Beam dynamics simulations have been performed with thecodes TRACE-3D (envelopes), DYNAMION,BEAMPATH and TRACK (multiparticle). The recentlayout of the LEBT, as well as the results of beam dynamics studies are presented

Virtual charge state separator as an advanced tool coupling measurements and simulations

A new low energy beam transport for a multicharge uranium beam will be built at the GSI High Current Injector (HSI). All uranium charge states coming from the new ion source will be injected into GSI heavy ion high current HSI Radio Frequency Quadrupole (RFQ), but only the design ions U^{4+} will be accelerated to the final RFQ energy. A detailed knowledge about injected beam current and emittance for pure design U^{4+} ions is necessary for a proper beam line design commissioning and operation, while measurements are possible only for a full beam including all charge states. Detailed measurements of the beam current and emittance are performed behind the first quadrupole triplet of the beam line. A dedicated algorithm, based on a combination of measurements and the results of advanced beam dynamics simulations, provides for an extraction of beam current and emittance values for only the U^{4+} component of the beam. The proposed methods and obtained results are presented