The Frankfurt Funneling Experiment
Funneling is a technique to multiply beam currents of rf-accelerators in several stages at low energies to prevent problems with space charge. The Frankfurt Funneling Experiment is a prototype of such a stage. Two beams are accelerated in a Two-Beam RFQ and combined to one beam axis with a funneling deflector. The last part of the RFQ electrodes of our Two-Beam RFQ has been replaced to achieve a 3d focus of both beams at the beam crossing point behind the RFQ in the center of the deflector. A new designed multi cell funneling deflector and first results of the new experimental set-up will be presented.
SIMULATIONS ON A BEAM TRANSPORT SYSTEM FOR THE FRANKFURT
The goal of the Frankfurt Funneling Experiment is to multiply beam currents by merging two low energy ion beams. Our setup consists of two ion sources, a two beam RFQ accelerator, a multi cell deflector and a beam diagnostics. Current work is the design of a new beam transport between RFQ accelerator and deflector and first simulations will be presented.
The Frankfurt funneling experiment
Funneling is a procedure to multiply beam currents at low energies which is necessary for the proposed new high current accelerator facilities like HIDIF or ESS. Funneling can be done by several stages. The beams of several LEBT's are merged in multiple stages to any kind of energy and beam current by funneling. The main goal is to keep the emittance nearly unchanged. The Frankfurt funneling experiment consists of two ion sources, a two-beam RFQ accelerator, two different funneling deflectors and a beam diagnostic equipment system. The whole set-up is scaled in He/sup +/ instead of Bi/sup +/ of the first funneling stage of a HIIF driver. The progress of our experiment and the results of the simulations will be presented.