Author: Kester, O.K.
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MOPOY016 HSI RFQ Upgrade for the UNILAC Injection to FAIR 877
  • C. Zhang, L. Groening, O.K. Kester, S. Mickat, H. Vormann
    GSI, Darmstadt, Germany
  • M. Baschke, H. Podlech, U. Ratzinger, R. Tiede
    IAP, Frankfurt am Main, Germany
  As an 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 20 emA, U4+ beams at the RFQ entrance. Since only 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 better beam performance compared to the previous design. This paper will focus on the performed study with respect to beam dynamics.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY016  
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MOPOY020 Prototype Design of a Newly Revised CW RFQ for the High Charge State Injector at GSI 889
SUPSS044   use link to see paper's listing under its alternate paper code  
  • D. Koser, H. Podlech
    IAP, Frankfurt am Main, Germany
  • P. Gerhard, L. Groening, O.K. Kester
    GSI, Darmstadt, Germany
  Within the scope of the FAIR project (Facility for Antiproton and Ion Research) at GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany, the front end of the existing High Charge State Injector (HLI) is planned to be upgraded for cw operation. The required newly revised 4-Rod RFQ structure is currently being designed at the Institute for Applied Physics (IAP) of the Goethe University of Frankfurt. It will be operated with a 100 kW power amplifier at 108 MHz. At first instance a dedicated 4-stem prototype, which is based on the RFQ design for MYRRHA* and FRANZ**, is planned to be manufactured in order to validate the simulated RF performance, thermal behavior and mechanical characteristics in continuous operation. The RF simulations as well as basic thermal simulations are done using CST Studio Suite. In order to prevent oscillations of the electrodes mechanical eigenmodes are analyzed using ANSYS Multiphysics. In addition the ANSYS software allows more sophisticated simulations regarding the cooling capability by considering fluid dynamics in water cooling channels, thus providing a more detailed thermal analysis.
*C. Zhang, H. Podlech, New Reference Design of the European ADS RFQ Accelerator For MYRRHA, IPAC2014
**M. Heilmann et al., A Coupled RFQ-IH Cavity for the Neutron Source FRANZ, IPAC2013
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY020  
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WEOBA03 High Brilliance Uranium Beams for FAIR 2052
  • W.A. Barth, A. Adonin, Ch.E. Düllmann, M. Heilmann, R. Hollinger, E. Jäger, O.K. Kester, J. Khuyagbaatar, J. Krier, E. Plechov, P. Scharrer, W. Vinzenz, H. Vormann, A. Yakushev, S. Yaramyshev
    GSI, Darmstadt, Germany
  • Ch.E. Düllmann, J. Khuyagbaatar, P. Scharrer, A. Yakushev
    HIM, Mainz, Germany
  • Ch.E. Düllmann
    Johannes Gutenberg University Mainz, Institut of Nuclear Chemistry, Mainz, Germany
  • P. Scharrer
    Mainz University, Mainz, Germany
  The 40 years old GSI-UNILAC (Universal Linear Accelerator) as well as the heavy ion synchrotron SIS18 will serve as a high current heavy ion injector for the new FAIR (Facility for Antiproton and Ion Research) synchrotron SIS100. Due to an advanced machine investigation program in combination with the ongoing UNILAC upgrade program, a new uranium beam intensity record (10 emA, U29+) at very high beam brilliance was achieved recently in a machine experiment campaign. This is an important step paving the way to fulfill the FAIR heavy ion high intensity beam requirements. Results of high current uranium beam measurements applying a newly developed pulsed hydrogen gas stripper (at 1.4 MeV/u) will be presented in detail.  
slides icon Slides WEOBA03 [2.281 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEOBA03  
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