A conceptual scheme of the Muon Collider (SOURCE: https://muoncollider.web.cern.ch/)
Muon colliders have great potential for high-energy physics: they can offer collisions of point-like particles since muons can be accelerated in a ring without limitation from synchrotron radiation. The main technical challenge arises from the short muon lifetime at rest and the difficulty of producing large numbers of muons in bunches, requiring the development of innovative technologies.
The International Muon Collider (MC) Study aims to establish whether a muon collider is feasible and, if so, to develop the concept and technology to a level that allows committing to its construction. A proposal to limit the impact on the site of the high neutrino flux has been already developed and discussed.
One of the projects PPD focuses on is the design of the 'Machine Detector Interface', the critical region where the accelerator meets the detector. Indeed, the detector will need to be shielded against the intense flux of muon-decay products from the incoming beams but without compromising too much its physics performance capability.