  In this White Paper for the Snowmass 2021 Process, we propose the
establishment of a magnet Leading-Edge technology And Feasibility-directed
Program (LEAF Program) to achieve readiness for a future collider decision on
the timescale of the next decade.
  The LEAF Program would rely on, and be synergetic with, generic R&D efforts
presently covered - in the US - by the Magnet Development Program (MDP), the
Conductor Procurement and R&D (CPRD) Program and other activities in the Office
of HEP supported by Early Career Awards (ECA) or Lab Directed R&D (LDRD) funds.
Where possible, ties to synergetic efforts in other Offices of DOE or NSF are
highlighted and suggested as wider Collaborative efforts on the National scale.
International efforts are also mentioned as potential partners in the LEAF
Program.
  We envision the LEAF Program to concentrate on demonstrating the feasibility
of magnets for muon colliders as well as next generation high energy hadron
colliders, pursuing, where necessary and warranted by the nature of the
application, the transition from R&D models to long models/prototypes. The LEAF
Program will naturally drive accelerator-quality and experiment-interface
design considerations. LEAF will also concentrate, where necessary, on cost
reduction and/or industrialization steps.
