Author: Groening, L.
Paper Title Page
TUPWA007 Method and Results of Systematic Beam Matching to a Periodic DTL 1733
 
  • L. Groening, W.A. Barth, P. Forck, I. Hofmann, S.G. Yaramyshev
    GSI, Darmstadt, Germany
  • D. Jeon
    IBS, Daejeon, Republic of Korea
 
  Systematic investigations on high current 3d-beam matching to a periodic Alvarez-type DTL are reported. Twiss parameters at the entrance of a matching section to the periodic structure were concluded from transverse and longitudinal measurements. Periodic solutions in 3d were calculated including space charge using the measured rms emittances. The matching was performed by rms beam size tracking and employing a numerical routine to set the matching section, which comprises five quadrupoles and two bunchers. Matching allowed for significant emittance growth reduction and for verification of non-linear beam dynamics effects along the DTL.  
 
TUPWA019 Comparison of Tracking Simulation with Experiment on the GSI UNILAC 1763
 
  • X. Yin
    IHEP, Beijing, People's Republic of China
  • W.A. Barth, W.B. Bayer, L. Groening, I. Hofmann, S.G. Richter, S.G. Yaramyshev
    GSI, Darmstadt, Germany
  • A. Franchi
    CERN, Geneva, Switzerland
  • A.C. Sauer
    IAP, Frankfurt am Main, Germany
 
  In the European framework “High Intensity Pulsed Proton Injector” (HIPPI), the 3D linac code comparison and benchmarking program with experiment have been initialed. PARMILA and HALODYN are involved in this work. Both of these codes have been developed and used for linac design and beam dynamics studies. In this paper, we compare the simulation results with experiment results which was carried out on the UNILAC Alvarez DTL. And discuss physics aspects of the different linac design and beam dynamics simulation codes.  
 
TUPWO009 Decoupling Capabilities Study of the Emittance Transfer Section 1895
 
  • C. Xiao, O.K. Kester
    IAP, Frankfurt am Main, Germany
  • L. Groening, O.K. Kester, M.T. Maier
    GSI, Darmstadt, Germany
 
  Flat beams are those which feature unequal emittances in the horizontal and vertical phase space. The present paper is on the planning of the experimental proof of principle. Detailed simulations of the experiment, initially based on linear matrix transformations, are performed. The remarkable flexibility of the set-up w.r.t. to decoupling is addressed, as it can provide an one-knob tool to set the horizontal and vertical emittance partitioning. It was found that the decoupling capability of the set-up is remarkably flexible and the impact and discussion of this finding is treated in a dedicated section  
 
THPWO008 Status of the 70 MeV FAIR Proton Injector 3773
 
  • G. Clemente, W.A. Barth, R. Bereznov, P. Forck, L. Groening, R. Hollinger, M. Kaiser, A. Krämer, F. Maimone, C. Mühle, J. Pfister, G. Schreiber, J. Trüller, W. Vinzenz, C. Will
    GSI, Darmstadt, Germany
  • R. M. Brodhage, B. Koubek, H. Podlech, U. Ratzinger, A. Schempp, R. Tiede
    IAP, Frankfurt am Main, Germany
  • N. Chauvin, O. Delferrière
    CEA/IRFU, Gif-sur-Yvette, France
  • B. Launé, J. Lesrel
    IPN, Orsay, France
  • C.S. Simon, O. Tuske
    CEA/DSM/IRFU, France
 
  Funding: BMBF
The FAIR project requires a dedicated proton injector for the creation of high intensity secondary antiproton beams. This machine will be the first high intensity linear accelerator based on CH-DTL. The status of the project, with particular emphasis on the construction of the first RF prototype is presented.
 
 
THPWO009 Beam Dynamics Error and Loss Investigation of the FAIR Proton Injector 3776
 
  • G. Clemente, W.A. Barth, P. Forck, L. Groening, R. Hollinger, M. Kaiser, J. Pfister, W. Vinzenz, S.G. Yaramyshev, C. Zhang
    GSI, Darmstadt, Germany
  • R. M. Brodhage, B. Koubek, H. Podlech, U. Ratzinger, A. Schempp, R. Tiede
    IAP, Frankfurt am Main, Germany
  • N. Chauvin, C.S. Simon, O. Tuske
    CEA/DSM/IRFU, France
  • O. Delferrière
    CEA/IRFU, Gif-sur-Yvette, France
  • B. Launé, J. Lesrel
    IPN, Orsay, France
 
  The FAIR Proton Linac is a 70mA, 70 MeV. 325 MHz linear accelerator based on CH cavities. The focusing scheme is provided by an asynchronous KONUS lattice period. Random misalignment and rotation errors of the quadrupoles, together with phase and RF settings of the power source plays a major role in beam losses. Those effects are investigated and the beam dynamics results, including several source of errors, are presented and discussed.  
 
THPWO010 Charge Stripping Tests of High Current Uranium Ion Beams with Methane and Hydrogen Gas Strippers and Carbon Foils at the GSI UNILAC 3779
 
  • B. Schlitt, W.A. Barth, G. Clemente, L. Groening, M. Kaiser, B. Lommel, M.T. Maier, S. Mickat, J. Steiner, H. Vormann
    GSI, Darmstadt, Germany
 
  At the GSI UNILAC, a nitrogen gas stripper is routinely used for stripping of heavy ion beams at 1.4 MeV/u. Different approaches to optimize the stripping efficiency as well as different options to increase the ion charge states for delivery to SIS18 are being investigated. The existing gas stripper was operated with methane and hydrogen gas for stripping of high current uranium ion beams. The results as well as the limitations of these tests will be presented and will be compared to standard nitrogen operation of the gas stripper. In addition, newest results using differently prepared carbon stripping foils for the same ion beams will be reported.