NB3SN accelerator magnet technology R&D at Fermilab

Accelerator magnets based on Nb3Sn supercondutor are being developed at Fermilab. Six nearly identical 1-m long dipole models and several mirror configurations were built and tested demonstrating magnet performance parameters and their reproducibility. The technology scale up program has started by building and testing long dipole coils. The results of this work are reported in the paper.