Low temperature irradiations of Nb3Sn with 14- MeV neutrons

High energy neutron irradiations have been performed on Nb3Sn superconductors to assess their behavior in a fusion reactor environment. Irradiations were performed at 4.2 K and property measurements were made without warming the samples. The critical current Icincreased with irradiation to a level about 50% above the unirradiated value at the highest fluences reached in our experiments. These results are compared with the results of other low temperature irradiations of Nb3Sn.