A HYBRID WARM-COLD SYNCHROTRON FOR THE MUON COLLIDER

Al Garren

July 28, 2011

ParametersFAST RAMPING MUON SYNCHROTRON LATTICE

Injection/Extraction Momenta (GeV/c) 375/750Circumference (m) 6288Number of superperiods 8Superperiod length (m) 786Superconducting magnet field (T) 7.995Ramped magnetic field min (T) -1.8Ramped magnetic field max (T) 1.8Quadrupole gradient min (T/m} 18.5Quadrupole gradient max (T/m} 37Cell length - normal and straight (m) 65.5Cell length - dispersion suppressor (m) 49.125Cell 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 NEquivalent number of normal dipoles 554.667 Cell magnet structure, superconducting S, ramped R, quads F,D: F SRRS SRRS D D SRRS SRRS FAlternate cell structure: F RSSR RSSR D D RSSR RSSR FQuadrupole length (m) 1.6Superconducting magnet length (m) 2.6568Ramped magnet length (m) 3.9732Dispersion suppressor cells: 3/4 length and 2/3 bend angle of nomal cellsHi-Lo energy separation of closed orbits (cm) 2.08Hi-Lo energy pathlength difference per superperiod (cm) 0.1019Bend angle of cold dipole at 562.5 GeV/c (rad) 0.011327858

General Properties• FODO lattice similar to FNAL Main Ring• Fixed field dipoles 8T interleaved with ramped dipoles at -

1.8 to 1.8T • Ramped quadruples• Beam injected at 375 GeV, extracted at 750 GeV• Circumference ~2 pi km• 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 49.125m (3/4Xstandard with 2/3X standard bends)• ‘Empty’ cells with no bends

Arc Cell

Straight Cell

Short Cell

Insertion

Superperiod

Orbit Offsets