# Design and expected performance of the MICE demonstration of ionization cooling

## TL;DR

The MICE experiment aims to demonstrate ionization cooling of muon beams, a crucial technique for future neutrino factories and muon colliders, by showing how muon beam emittance can be effectively reduced.

## Contribution

This paper presents the design and predicted performance of the revised MICE ionization cooling demonstration experiment.

## Key findings

- Design of the cooling channel described
- Predicted reduction in muon beam emittance
- Feasibility of demonstrating ionization cooling confirmed

## Abstract

Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams necessary to elucidate the physics of flavour at a neutrino factory and to provide lepton-antilepton collisions at energies of up to several TeV at a muon collider. The international Muon Ionization Cooling Experiment (MICE) aims to demonstrate ionization cooling, the technique by which it is proposed to reduce the phase-space volume occupied by the muon beam at such facilities. In an ionization-cooling channel, the muon beam passes through a material in which it loses energy. The energy lost is then replaced using RF cavities. The combined effect of energy loss and re-acceleration is to reduce the transverse emittance of the beam (transverse cooling). A major revision of the scope of the project was carried out over the summer of 2014. The revised experiment can deliver a demonstration of ionization cooling. The design of the cooling demonstration experiment will be described together with its predicted cooling performance.