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Open Access Publications from the University of California

Fast neutron Damage Studies on NdFeB Materials


Many materials and electronics need to be tested for the radiation environment expected at linear colliders (LC) since both accelerator and detectors will be subjected to large fluences of hadrons, leptons and gamma’s over the life of the facility. While the linacs will be superconducting, there are still many uses for NdFeB in the damping rings, injection and extraction lines and final focus. Our understanding of the situation for rare earth, permanent magnet materials was presented at the Particle Accelerator Conference 2003. Our first measurements of fast neutron, stepped doses at the UC Davis McClellan Nuclear Reactor Center (UCD MNRC) were presented at the European Particle Accelerator Conference 2004. We have extended the doses, included other manufacturer’s samples, and measured induced radioactivities which are discussed in detail.

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