HYBRID WARM-COLD SYNCHROTRON FOR THE MUON COLLIDER Al Garren July 28, 2011

8 PERIOD RING Parameters FAST RAMPING MUON SYNCHROTRON LATTICE Injection/Extraction Momenta (GeV/c)375/750 Circumference (m)6288 Number of superperiods8 Superperiod length (m)786 Superconducting magnet field (T)7.995 Ramped magnetic field min (T)-1.8 Ramped magnetic field max (T)1.8 Quadrupole gradient min (T/m}18.5 Quadrupole gradient max (T/m}37 Cell length - normal and straight (m)65.5 Cell length - dispersion suppressor (m) Cell length - standard and straight (m) Superperiod structure: normal N, straight S, suppressor D D D S S S D D N N N N N N Equivalent number of normal dipoles Cell magnet structure, superconducting S, ramped R, quads F,D: F SRRS SRRS D D SRRS SRRS F Alternate cell structure: F RSSR RSSR D D RSSR RSSR F Quadrupole length (m)1.6 Superconducting magnet length (m) Ramped magnet length (m) Dispersion suppressor cells: 3/4 length and 2/3 bend angle of nomal cells Hi-Lo energy separation of closed orbits (cm)2.08 Hi-Lo energy pathlength difference per superperiod (cm) Bend angle of cold dipole at GeV/c (rad)

8 PERIOD RING General Properties FODO lattice similar to FNAL Main Ring Fixed field dipoles 8T interleaved with ramped dipoles at to 1.8T Ramped quadruples Beam injected at 375 GeV, extracted at 750 GeV Circumference 6288 m 8 superperiods Superperiod contains 3 cell types: standard, short, empty Standard 65.5m, 4 fixed-field and 4 ramped-field dipoles per half-cell Short m (3/4Xstandard with 2/3X standard bends) Straight cells with no bends 65.5 m

Straight Cell

Short Cell

Dispersion Suppressor

Insertion

Superperiod

Orbit Offsets