ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The influence of fast neutron irradiation on critical current Ic and its strain dependence in a bronze processed fine multifilamentary Nb3Sn superconducting composite has been investigated. The neutron irradiation has been performed in a fission reactor at the reactor ambient temperature ((approximately-equal-to)355 K) up to the neutron fluence φt=3.6×1019 n/cm2 (E〉0.1 MeV). The effects of annealing after irradiation have also been investigated. From the measurement of Ic at various magnetic fields, the scaling law for the change in dose has been found to be held in a certain range of neutron dose. The strain sensitivity of Ic under common ratio of applied magnetic field to bulk upper critical field B@B|c2 is affected slightly by irradiation up to φt=1.5×1019 n/cm2 but remarkably by annealing after irradiation to 3.6×1019 n/cm2. The strain scaling law has been found to be the specimen irradiated to 1.5×1019 n/cm2 and also to the one annealed (723 K, 2 h) after 3.6×1019 n/cm2 irradiation. The exponent value for B*c2 in pinning force density vs B@B|c2 relation deviated from unity which is applied for many types of Nb3Sn conductors.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.340159
