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Ensinger, W.

Paper Title Page
THO2C04 Radiation Hardness of Insulating Components for the New Heavy-ion Accelerator Facility 667
  • T. Seidl, W. Ensinger
    Technical University Darmstadt, Darmstadt
  • E. Floch, E. Mustafin, A.B. Plotnikov, D. Severin, C. Trautmann
    GSI, Darmstadt
  • A. Golubev, A. Smolyakov
    ITEP, Moscow
  • R. Lopez, D. Tommasini
    CERN, Geneva

The planned International Facility for Antiproton and Ion Research (FAIR) will consist of a superconducting double-ring synchrotron offering ion beams of intensity increased by a factor of 100-1000 compared to the existing GSI accelerators. Assuming typical beam losses of a few percent, materials close to the beam tube will be exposed to secondary radiation of neutrons, protons, and heavier particles, limiting the lifetime and reliable function of various device components. The present study investigates the radiation hardness of insulating components with focus on polyimide as electrical insulation and “G11”-type glass fiber reinforced plastics (GFRP) as support structure in the superconducting SIS magnets. Dedicated irradiation experiments were performed with different projectiles such as 21 and 800 MeV protons (ITEP, Russia) and various heavy ions of MeV-GeV energy (GSI, Germany). Degradation tests of irradiated materials include structural changes performed by IR spectroscopy, breakdown voltage and thermal conductivity measurements. Special attention is given to effects induced by heavy ions (e.g., Ta, Au) because they are known to create extensive damage at rather low doses.


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