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Demonstration of cooling by the Muon Ionization Cooling Experiment

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Title: Demonstration of cooling by the Muon Ionization Cooling Experiment
Authors: MICE collaboration
Item Type: Journal Article
Abstract: The use of accelerated beams of electrons, protons or ions has furthered the development of nearly every scientific discipline. However, high-energy muon beams of equivalent quality have not yet been delivered. Muon beams can be created through the decay of pions produced by the interaction of a proton beam with a target. Such 'tertiary' beams have much lower brightness than those created by accelerating electrons, protons or ions. High-brightness muon beams comparable to those produced by state-of-the-art electron, proton and ion accelerators could facilitate the study of lepton-antilepton collisions at extremely high energies and provide well characterized neutrino beams1-6. Such muon beams could be realized using ionization cooling, which has been proposed to increase muon-beam brightness7,8. Here we report the realization of ionization cooling, which was confirmed by the observation of an increased number of low-amplitude muons after passage of the muon beam through an absorber, as well as an increase in the corresponding phase-space density. The simulated performance of the ionization cooling system is consistent with the measured data, validating designs of the ionization cooling channel in which the cooling process is repeated to produce a substantial cooling effect9-11. The results presented here are an important step towards achieving the muon-beam quality required to search for phenomena at energy scales beyond the reach of the Large Hadron Collider at a facility of equivalent or reduced footprint6.
Issue Date: 5-Feb-2020
Date of Acceptance: 13-Dec-2019
URI: http://hdl.handle.net/10044/1/76825
DOI: 10.1038/s41586-020-1958-9
ISSN: 0028-0836
Publisher: Nature Research
Start Page: 53
End Page: 59
Journal / Book Title: Nature
Volume: 578
Issue: 7793
Copyright Statement: © 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Sponsor/Funder: Particle Physics and Astronomy Research Council (PPARC)
Particle Physics and Astronomy Research Council (PPARC)
Particle Physics and Astronomy Research Council (PPARC)
The Royal Society
Commission of the European Communities
Council for the Central Laboratory of the Research Councils' (CCLRC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Commission of the European Communities
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Imperial College Trust
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Funder's Grant Number: PP/B500882/1
PP/B500890/1
PPA/V/S/2002/00452
NC/JP/16367
RII3-CT-2003-506395
MICE-UK 1/05
PP/E000509/1
PP/E003192/1
212372
ST/H000992/1
ST/H001735/1 MICE/UKNF
ST/H000992/2
ST/J002097/1 MICE/UKNF
ST/K001604/1
PR1200SB
ST/L006359/1
PHHE_P52636
PR120056
ST/N003357/1
ST/P001203/1
Keywords: MICE collaboration
General Science & Technology
Publication Status: Published
Conference Place: England
Open Access location: https://www.nature.com/articles/s41586-020-1958-9
Appears in Collections:Physics
High Energy Physics
Faculty of Natural Sciences