Recent results from the study of emittance evolution in MICE

TL;DR

The MICE experiment has measured how muon beam emittance changes due to ionization energy loss in different absorbers, providing valuable data for muon cooling techniques essential for future particle accelerators.

Contribution

This paper reports recent experimental measurements of muon emittance evolution in ionization cooling setups, including data from lithium-hydride and liquid hydrogen absorbers.

Findings

Measured emittance reduction in muon beams with various initial conditions

Compared effects of different absorber materials on emittance evolution

Presented latest data and analysis status from 2016-2017 experiments

Abstract

The Muon Ionization Cooling Experiment (MICE) has measured the evolution of emittance due to ionization energy loss. Muons were focused onto an absorber using a large aperture solenoid. Lithium-hydride and liquid hydrogen- absorbers have been studied. Diagnostic devices were placed upstream and downstream of the focus, enabling the phase- space coordinates of individual muons to be reconstructed. By observing the properties of ensembles of muons, the change in beam emittance was measured. Data taken during 2016 and 2017 are currently under study to evaluate the change in emittance due to the absorber for muon beams with various initial emittance, momenta, and settings of the magnetic lattice. The current status and the most recent results of these analyses will be presented.