Abstract
The influence of neutron irradiation up to fluences of 4 × 10 22 n/m 2 on the parameters and criteria determining the calculation process of the maximum magnetic induction values B m is discussed. As parameters the critical data of NbTi, Nb 3Sn and the resistivity of copper and aluminium are considered. As criteria, the criteria for full stability and that for coil protection under the influence of radiation damage are discussed. Up to a fluence of about 4 × 10 22 n/m 2 the influence of the resistivity increase of the stabilizing material is dominant. If the coils are not oversized, considerable reductions of the maximum magnetic field values are the consequence. B m is calculated analytically for three toroidal coil systems, taking into consideration the radiation induced changes. The calculations are based on two relations taking into account the superconducting parameters and the mechanical properties of the coil winding.
Published Version
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