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Herfurth, F.

Paper Title Page
MOP019 The HITRAP Decelerator Project at GSI - Status and Commissioning Report 100
  • L.A. Dahl, W. Barth, P. Gerhard, F. Herfurth, M. Kaiser, O.K. Kester, H.J. Kluge, S. Koszudowski, C. Kozhuharov, G. Maero, W. Quint, A. Sokolov, T. Stöhlker, W. Vinzenz, G. Vorobjev, D.F.A. Winters
    GSI, Darmstadt
  • B. Hofmann, J. Pfister, U. Ratzinger, A.C. Sauer, A. Schempp
    IAP, Frankfurt am Main

For injection into the ion trap facility HITRAP, the GSI accelerator complex has the unique possibility to provide beams of highly stripped ions and even bare nuclei up to Uranium at an energy of 4 MeV/u. The HITRAP facility consists of linear 108 MHz-structures of IH- and RFQ-type to decelerate the beams further down to 6 keV/u for capturing in a large penning trap for cooling purpose. The installation is completed except of the RFQ-tank. During commissioning periods in 2007 64Ni28+ and 20Ne10+ beam was used to investigate the beam optics from the experimental storage ring extraction to the HITRAP double-drift-buncher system. In 2008 the IH-structure decelerator and the downstream matching section was examined with 197Au79+ beam. Comprehensive beam diagnostics were installed: Faraday cups, tubular and short capacitive pick ups, SEM grids, YAG scintillation screens, a single shot pepperpot emittance meter, and a diamond detector for bunch shape measurements. Results of the extensive measurements are presented.

TUP074 Commissioning of the HITRAP Decelerator Using a Single-Shot Pepper Pot Emittance Meter 564
  • J. Pfister, R. Nörenberg, U. Ratzinger
    IAP, Frankfurt am Main
  • W. Barth, L.A. Dahl, P. Forck, F. Herfurth, O.K. Kester, T. Stöhlker
    GSI, Darmstadt

Funding: Work supported by BMBF under contract 06FY160I.
The Heavy highly charged Ion TRAP (HITRAP) project at GSI is in the commissioning phase. Highly charged ions up to U92+ provided by the GSI accelerator facility will be decelerated and subsequently injected into a large Penning trap for cooling to the MeV/u energy level. A combination of an IH- and an RFQ-structure decelerates the ions from 4 MeV/u down to 6 keV/u. In front of the decelerator a double drift-buncher-system is provided for phase focusing and a final de-buncher integrated in the RFQ-tank reduces the energy spread in order to improve the efficiency for beam capture in the cooler trap*. This contribution concentrates on the beam dynamics simulations and corresponding measurements in the commissioning beam times up to the position of the entrance to the RFQ. Single-shot emittance measurements at higher energies using the GSI pepper pot device and construction of a new device using Micro-Channel Plate technology for low energies as well as profile measurements are presented.

*HITRAP webpage of AP division at GSI, http://www.gsi.de/forschung/ap/projects/hitrap/index_e.html