Author: Walasek-Hoehne, B.     [Walasek-Höhne, B.]
Paper Title Page
MOPF13 Transverse Beam Profiling for FAIR 232
  • M. Schwickert, C.A. Andre, F. Becker, P. Forck, T. Giacomini, E. Gütlich, T. Hoffmann, A. Lieberwirth, S. Löchner, A. Reiter, B. Voss, B. Walasek-Höhne, M. Witthaus
    GSI, Darmstadt, Germany
  The FAIR facility will provide intense primary beams of protons and heavy ions, or secondary beams of antiproton and rare isotopes. The operation includes fixed-target experiments or subsequent facilities of independent storage rings and experiment beam lines. The particle beams greatly differ in ion species, intensity, time structure, spot size and stopping power. Therefore, transverse beam profile measurements require a careful choice of detector type for each location in order to cope with the large dynamic range and operational demands. This contribution presents the actual status of FAIR detector developments for intercepting devices (SEM-Grids, Multi-Wire Proportional Chambers, Scintillating Screens) as well as non-intercepting Beam Induced Fluorescence Monitors and Ionization Profile Monitors. Recently, promising results were obtained with slow extracted heavy ion beams in measurements of optical transmission radiation emitted from thin metal foils. The boundaries for the application area are described and basic detector parameters are summarized.  
TUPF21 Response of Scintillating Screens to Fast and Slow Extracted Ion Beams 553
  • A. Lieberwirth, W. Ensinger
    TU Darmstadt, Darmstadt, Germany
  • P. Forck, B. Walasek-Höhne
    GSI, Darmstadt, Germany
  Funding: Funded by German Ministry of Science (BMBF), contract number 05P12RDRBJ
For the FAIR project, imaging properties of inorganic scintillators for high energetic heavy ion beams were studied. In order to investigate the characteristics of scintillation response and transverse beam profile, several experiments were conducted with slow (200 ms) and fast (1 μs) extracted 350 MeV/u Uranium beams from SIS18. The extracted particle number was varied between 105 and 109 particles per pulse for the irradiation of seven different scintillators: YAG:Ce-crystals with different qualities, pure and Cr-doped alumina as well as two phosphors P43 and P46. Additionally radiation resistance tests for all phosphor screens and the Cr-doped alumina screen were performed by irradiating with more than 700 pulses with 109 ions each. Linear response in scintillation light output as well as realistic statistical moments over the large range of ion intensities are presented for each material. Only minor changing in target response was observed after 45 minutes of permanent irradiation.
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