Muon colliders offer a unique path to multi-TeV, high luminosity lepton collisions. Muon collisions with a center-of-mass energy of 10 TeV or above would offer significant discovery potential where the constituent collision energies exceed those of the LHC program by an order of magnitude. Significant progress on the fundamental R&D and design concepts for such a machine has led to a new international effort to assemble a conceptual design within the next few years. This effort will assess the viability of such a machine as a successor to the LHC program. The remaining challenges and the R&D required to deliver a complete machine description will be described.

Mark Palmer Bio:
Mark Palmer is currently Director of the Accelerator Facilities Division in the Advanced Technology Research Office at Brookhaven National Laboratory. Previously, he headed the U.S. Muon Accelerator Program (MAP), which carried out research to develop muon accelerator technologies for future neutrino beam and lepton collider facilities. He was also part of the International Linear Collider design team and helped lead the CESR Test Accelerator research program at Cornell University. Mark received his doctorate in physics from Princeton University. Through the course of his career, he has conducted research in gravitational, high energy and accelerator physics.