A Complete Scheme of Ionization Cooling for a Muon Collider

TL;DR

This paper presents a comprehensive ionization cooling scheme for muon beams tailored for three muon collider designs, detailing the process from initial production to final transverse cooling with simulation results.

Contribution

It introduces a complete, step-by-step ionization cooling scheme for muon colliders, including innovative emittance exchange and high-field solenoid cooling techniques.

Findings

Emittance exchange cooling effectively reduces longitudinal emittance.

High Tc superconductor solenoids achieve final transverse cooling.

Preliminary simulations validate each cooling stage.

Abstract

A complete scheme for production and cooling a muon beam for three specified muon colliders is presented. Parameters for these muon colliders are given. The scheme starts with the front end of a proposed neutrino factory that yields bunch trains of both muon signs. Emittance exchange cooling in slow helical lattices reduces the longitudinal emittance until it becomes possible to merge the trains into single bunches, one of each sign. Further cooling in all dimensions is applied to the single bunches in further slow helical lattices. Final transverse cooling to the required parameters is achieved in 50 T solenoids using high Tc superconductor at 4 K. Preliminary simulations of each element are presented.