Abstract
A preliminary lattice design of a muon collider ring with the center-of-mass (CM) energy of 6 TeV is presented. The ring circumference is 6.3 km, and the beta function at collision point is β* = 1 cm in each plane. The ring linear optics, a local non-linear chromaticity compensation in the Interaction Region (IR), additional IR non-linear correction knobs, and the effects of non-linear fringe field are discussed. Magnet specifications are based on the maximum pole-tip field of 20 T in dipoles and 15 T in quadrupoles. Careful compensation of the non-linear chromatic and amplitude dependent effects provides a sufficiently large dynamic aperture for the momentum range of up to ± 0.5% without considering magnet errors.
Highlights
A muon collider is one of the potential candidates for a future energy frontier colliding machine
The requirements are arising from a short muon lifetime and relatively large values of transverse emittance and momentum spread that can be realistically achieved with ionization cooling
They come from the limitations on the maximum magnetic fields as well as the necessity to protect superconducting (SC) magnets and collider detectors from muon decay products
Summary
A muon collider is one of the potential candidates for a future energy frontier colliding machine. The requirements are arising from a short muon lifetime and relatively large values of transverse emittance and momentum spread that can be realistically achieved with ionization cooling They come from the limitations on the maximum magnetic fields as well as the necessity to protect superconducting (SC) magnets and collider detectors from muon decay products. For a 6 TeV muon collider ring, achieving a short circumference and strong focusing in the IR requires rather high magnetic field. In this design, we chose the circumference of ≈6.3 km (approximately the size of the Tevatron) and the maximum pole-tip field of 20 T in dipoles and 15 T in quadrupoles. At each end of the IR there is a dispersion suppressor FODO section followed by a ~40 m of non-dispersive
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