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Page |
| WEC05 |
Design Studies for a New Heavy Ion Injector Linac for FAIR |
191 |
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- B. Schlitt, W.A. Barth, G. Clemente, W. Vinzenz
GSI, Darmstadt, Germany
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As the GSI UNILAC started operation in 1975, it will be more than 40 years old when the commissioning of the future Facility for Antiproton and Ion Research (FAIR) at GSI will start. To assure reliable operation for FAIR and to provide beams for a variety of experiments, three separate linacs are proposed: 1.) A new superconducting cw heavy-ion linac behind the upgraded high charge state injector HLI shall provide ion beams with high duty cycle and adjustable energy in the MeV/u region for the super-heavy element program as well as for further UNILAC experiments. 2.) A dedicated 70 MeV proton linac will serve as injector for the FAIR pbar physics program. 3.) To deliver high-intensity heavy-ion beams for FAIR, the existing post-stripper linac should be replaced by a new high energy linac with short beam pulses, low pulse repetition rate, and fixed end energy. Conceptual design studies for the latter machine using 108 MHz IH-type drift tube structures will be presented, including a proposal to increase the ion charge states for synchrotron injection as well as a linac beam energy upgrade using 325 MHz CH structures.
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Slides WEC05 [6.013 MB]
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| THB05 |
The HITRAP Decelerator and Beam Instrumentation |
217 |
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- F. Herfurth, Z. Andjelkovic, W.A. Barth, K. Brantjes, G. Clemente, L.A. Dahl, S. Fedotova, P. Gerhard, M. Kaiser, O.K. Kester, H.J. Kluge, C. Kozhuharov, M.T. Maier, D. Neidherr, W. Quint, A. Reiter, T. Stöhlker, G. Vorobjev, S.G. Yaramyshev
GSI, Darmstadt, Germany
- U. Ratzinger, A. Schempp
IAP, Frankfurt am Main, Germany
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A linear decelerator is being commissioned for heavy, highly-charged ions (HCI) at GSI in Darmstadt/Germany. HCI with only one or few electrons are interesting systems for many different experiments as for instance precision tests of the theory of quantum electrodynamics (QED). In order to transform heavy HCI produced at 400 MeV/u to stored and cooled HCI at low energy the linear decelerator facility HITRAP has been setup behind the experimental storage ring (ESR). The ions are decelerated in the ESR from 400 to 4 MeV/u, cooled and extracted. The ions are then matched to an IH-structure using a double drift buncher, decelerated from 4 to 0.5 MeV/u in the IH, and then down to 6 keV/u in a 4-rod RFQ. To detect and analyze the weak and sparse ion bunches a new type of energy analyzing detector has been developed along with improvements to other “standard” beam instrumentation. One million highly charged ions have been decelerated with the IH from 400 MeV/u to about 0.5 MeV/u per cycle. The RFQ has shown in off-line tests to decelerate ions, however, the measured acceptance does not fit the ion beam from the IH. This requires a refined design, which is underway.
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Slides THB05 [2.925 MB]
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