Author: Vossberg, M.
Paper Title Page
MOPOPA16 UNILAC Heavy Ion Beam Operation at FAIR Intensities 102
 
  • W.A. Barth, M. Miski-Oglu, U. Scheeler, H. Vormann, M. Vossberg, S. Yaramyshev
    GSI, Darmstadt, Germany
  • M. Miski-Oglu
    HIM, Mainz, Germany
 
  The GSI-UNILAC as well as the heavy ion synchrotron SIS18 will serve as a high current heavy ion injector for the FAIR synchrotron SIS100. In the context of an advanced machine investigation program acceleration and transport of space charge dominated argon beam inside entire UNILAC have been explored. The conducted high current argon beam measurements throughout the UNILAC-poststripper and transferline to SIS18 show a transversal emittance growth of only 35% for the design current of 7 emA (40Ar10+). By horizontal collimation of the UNILAC beam emittance, the space charge limit could be reached at slightly lower pulse currents, but accordingly longer injection times. Further improvements in brilliance can be expected from the planned upgrade measures, in particular on the high-current injector linac.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOPA16  
About • Received ※ 19 August 2022 — Revised ※ 22 August 2022 — Accepted ※ 26 August 2022 — Issue date ※ 01 September 2022
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MOPOPA18 High Intensity Heavy Ion Beam Optimization at GSI UNILAC 110
 
  • H. Vormann, W.A. Barth, M. Miski-Oglu, U. Scheeler, M. Vossberg, S. Yaramyshev
    GSI, Darmstadt, Germany
 
  To improve the UNILAC’s performance for the upcoming use as heavy ion injector for the FAIR accelerator chain, dedicated beam investigations have been carried out. In particular measurements with Bismuth and Uranium beams require the highest accelerating voltages and powers of the rf cavities, the rf transmitters and the magnet power converters. After four years without Uranium operation (resp. with Uranium, but restricted cavity voltages), the UNILAC has now been operated again with a performance close to that of former years. Several upgrade measures will improve the UNILAC capability. In combination with the prototype pulsed gas stripper with hydrogen gas, beam intensities not far below the FAIR requirements can already now be expected.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MOPOPA18  
About • Received ※ 24 August 2022 — Revised ※ 26 August 2022 — Accepted ※ 28 August 2022 — Issue date ※ 01 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)