  Physics goals of a Muon Collider (MC) can only be reached with appropriate
design of the ring, interaction region (IR), high-field superconducting
magnets, machine -detector interface (MDI) and detector. Results of the most
recent realistic simulation studies are presented for a 1.5-TeV MC. It is shown
that appropriately designed IR and MDI with sophisticated shielding in the
detector have a potential to substantially suppress the background rates in the
MC detector. The main characteristics of backgrounds are studied.
