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Description
A future 10 TeV muon collider holds significant promise, enabling precise, percent-level measurements of Standard Model Properties. However, we must first produce, accelerate, and collide muons before they decay. The process begins by accelerating a proton beam and colliding it with a target, producing a “basketball-sized” cloud of muons. In the next step, known as cooling, this muon cloud is compressed into a ~25 µm bunch before being further accelerated. Cooling focuses on reducing the size and distribution of a particle beam otherwise known as emittance.
The last stage of this cooling, known as final 4D cooling, focuses on reducing the emittance in the transverse directions while allowing the emittance in the longitudinal direction to increase. Previous studies have implemented final 4D cooling by using absorbers within extremely strong focusing lattices, but simulations of these systems have demonstrated that they cannot reach target design goals with existing magnet technology.
Previously, we developed and simulated an alternative approach for the final 4D cooling channel based on thick wedges. This channel achieves a lower transverse and longitudinal emittance than the best design previously published. However, magnets for focusing, beam transport, and bending were not studied and were assumed ideal. This work demonstrates that a drift channel can be designed to reach the desired beam optics in a final 4D cooling system with thick wedges.
