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MATERIALS-09 Dielectric strength of ion irradiated polyimide and epoxy/fiber composites

By T. Seidl, W. Ensinger, E. Floch, A. Golubev, R. Lopez, E. Mustafin, A. Plotnikov, A. Smolyakov, D. Tommasini, C. Trautmann and Technische Universität Darmstadt

Abstract

During long-term operation of the new FAIR facility, parts of the superconducting magnets will be exposed to high radiation levels, cryogenic temperatures, and dynamic mechanical loads (Lorentzian forces during pulsed operation). Depending on the position of the different components, the radiation due to beam losses consists of a cocktail of gammas, neutrons, protons, and heavier particles [1]. Although the number of heavy fragments of the initial projectiles is small compared to neutrons, protons, or light fragments (e.g. α particles), their large energy deposition can induce extensive damage at rather low fluences (dose calculations show that the contribution of heavy ions to the total accumulated dose can reach 80% [2]). In the MeV to GeV energy regime, beam-induced radiation damage strongly depends on the specific sensitivit

Year: 2010
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