A mu mu collider capture solenoid system for pions from a tilted target

In order to generate muon beams for a muon collider, pions produced in a target must be captured before they can go through phase rotation and decay into muons. A 20 T solenoid with a clear bore of 150 mm can capture particles with a transverse momentum of 225 MeV/c or less. As captured particles leave the capture solenoid, the induction is decreased to 5 T while the beam pipe diameter increases to 300 mm. Phase rotation and decay of the pions will occur at 5 T. The capture solenoid and the solenoids just downstream from the capture solenoid are subject to high heat loads (up to 2.4 MW). The conventional inner solenoid of the 20 T hybrid magnet system and the water cooled absorber will absorb most of the beam power from the protons thus protecting the superconducting solenoid system from heating. Tilting the target and the incoming beam about 150 milliradians with respect to the solenoid axis appears to increase the net pion capture by about sixty percent. This paper describes approaches for capturing muons from a tilted target while getting rid of the spent proton beam