Darmstadt 2016 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 2: RF, Resonators and Applications I
AKBP 2.4: Vortrag
Montag, 14. März 2016, 14:45–15:00, S1/05 24
New Design of the HSI RFQ for UNILAC Upgrade — •Chuan Zhang1, Lars Groening1, Sascha Mickat1, Hartmut Vormann1, Markus Baschke2, Holger Podlech2, Ulrich Ratzinger2, and Rudolf Tiede2 — 1GSI Helmholtz Center for Heavy Ion Research, Planckstr. 1, Darmstadt, Germany — 2Institute for Applied Physics, Goethe-University, Frankfurt a.M., Germany
As the main injector to the future FAIR facility, the UNILAC accelerator is required to deliver ion beams with high intensities as well as good beam quality. The electrodes of the current HSI RFQ are exhausted and the current RFQ itself is assigned to be one bottle-neck for improving the brilliance performance of the whole linac. Based on the so-called NFSP (New Four-Section Procedure) method, a new RFQ electrode design has been developed and optimized for 20emA, U4+ beams at the RFQ-eintrance. Since just the electrodes will be replaced, the RFQ length has been kept unchanged. Even with a lowered inter-vane voltage, the new RFQ design has achieved higher transmission efficiency and much better brilliance, compared to previous designs.