Author: Sieber, T.
Paper Title Page
THPME100 The Mechanical Design of the BPM Inter-tank Section for P-linac at FAIR 3474
 
  • M.H. Almalki, R. M. Brodhage, P. Forck, W. Kaufmann, O.K. Kester, P. Kowina, T. Sieber
    GSI, Darmstadt, Germany
  • M.H. Almalki, R. M. Brodhage, O.K. Kester
    IAP, Frankfurt am Main, Germany
  • M.H. Almalki
    KACST, Riyadh, Kingdom of Saudi Arabia
  • J. Balaguer
    CEA/IRFU, Gif-sur-Yvette, France
  • P. Girardot, C.S. Simon
    CEA/DSM/IRFU, France
  
  At the planned Proton LINAC at the FAIR facility, four-fold button Beam Position Monitor (BPM) will be installed at 14 locations along the 30 m long FAIR p-LINAC. The LINAC comprises of crossbar H-mode (CH) cavity to accelerate a 70 mA proton beam up to 70 MeV at frequency of 325 MHz. At four locations, the BPMs will be an integral part of the inter-tank section between the CCH and CH cavities within an evacuated housing. As the BPM centre is only 48 mm apart from the upstream cavity boundary, the rf-background at the BPM position, generated by the cavity must be evaluated. In this paper the mechanical design of the BPM for the inter-tank section is presented and the rf-noise at the BPM location is discussed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME100  
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THPME102 Beam-based Tests of Intercepting Transverse Profile Diagnostics for FAIR 3480
 
  • P. Forck, C.A. Andre, C. Dorn, R. Haseitl, S. Lederer, A. Lieberwirth, S. Löchner, A. Reiter, M. Schwickert, T. Sieber, B. Walasek-Höhne, M. Witthaus
    GSI, Darmstadt, Germany
  • W. Ensinger, S. Lederer, A. Lieberwirth
    TU Darmstadt, Darmstadt, Germany
  
  Funding: Partly funded by German Ministry of Science (BMBF), contract number 05P12RDRBJ.
The FAIR facility will serve as a versatile accelerator for ions of energies between 100 MeV/u and 29 GeV/u with an intensity variation over more than 6 orders of magnitude. In the transport lines the transverse profile determination will be based mainly on intersecting methods: Scintillations screens, SEM-Grids, Multi-Wire-Proportional Chambers and possibly Optical Transition Radiation screens. The devices are tested at the existing SIS18 at GSI where ions are ex-tracted either in a fast mode (about 1 mus) or resonant mode within about typically 0.3 s. The imaging properties of scintillation screens of different materials (ceramics, phosphor screens and single crystals) with ion beams with energies above 300 MeV/u were investigated. Over intensities 105 to 109 particles per pulse the light yield for the screens is linear with respect to the ion intensity. Moreover, the radiation resistance of the screens was tested. The applicability of optical transition radiation for beams of velocities below 90%c was investigated systematically with heavy ions. The experimental results are compared to wire-based methods obtained with SEM-Grids and MWPCs. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME102  
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