Muon collider interaction region design
  Design of a muon collider interaction region (IR) presents a number of challenges arising from low {\beta} * < 1 cm, correspondingly large beta-function values and beam sizes at IR magnets, as well as the necessity to protect superconducting magnets and collider detectors from muon decay products. As a consequence, the designs of the IR optics, magnets and machine-detector interface are strongly interlaced and iterative. A consistent solution for the 1.5 TeV c.o.m. muon collider IR is presented. It can provide an average luminosity of 1034 cm-2s-1 with an adequate protection of magnet and detector components. 
Y. I. Alexahin, E. Gianfelice-Wendt, V. V. Kashikhin, N. V. Mokhov, A.   V. Zlobin (Fermilab), V. Y. Alexakhin (Dubna, JINR)
physics.acc-ph