  The scope of the proposal outlined in this white paper is the development and
demonstration of the technology needed for next generation of Nb_3Sn
accelerator magnets in the 12-14 T range. The main goal is to cut magnet
cold-mass cost by a factor 2 or higher with respect to the Nb_3Sn magnets
produced by the US Accelerator Upgrade Project (AUP) for the High-Luminosity
Large Hadron Collider (HL-LHC). This goal will be achieved by significant
reduction of labor hours, higher operating point, and improved performance
uniformity. A key factor will be automation that will be achieved through
industry involvement and benefitting from the experience gained in US national
laboratories through the production of the AUP magnets. This partnership will
enable the development of a technology that will be easily transferable to
industry for mid- and large-scale production of Nb_3Sn accelerator magnets in
the 12-14 T range. This step is essential to enable next generation of
colliders such as the FNAL-proposed Muon Collider, FCC and other HEP hadron
colliders.
  This is a Directed R&D where direction is given by the field range and
industry involvement for high-automation and industry-ready technology. The
plan includes ten milestones, to be achieved in 6-8 years at the cost of 5-7
$M/year.
