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Emittance Reduction in MICE Flip Mode

Abstract

Low emittance muon beams are central to the development of facilities such as a Neutrino Factory or a Muon Collider. The international Muon Ionization Cooling Experiment (MICE) was designed to demonstrate and study the cooling of muon beams. Several million individual muon tracks have been recorded passing through a liquid hydrogen or a lithium hydride absorber. Beam sampling routines were employed to account for imperfections in beam matching at the entrance into the cooling channel and enable an improvement of the cooling performance. A study of the change in normalized transverse emittance in a flipped polarity magnetic field configuration is presented and the characteristics of the cooling effect are discussed.

Paper

Published in: forthcoming
arXiv: forthcoming
RAL Preprint: forthcoming
DOI: forthcoming

BibTex: forthcoming
References: forthcoming
Source: forthcoming

Figures

Figure 1

Neutrino 2020 Poster

Neutrino 2020 Poster

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Figure 2

MICE cooling apparatus and magnetic field model

MICE apparatus

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Figure 3

Transverse phase space plots example

Phase space up- and downstream example

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Figure 4

Optics matching using rejection sampling

Optics (beta) matching example

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Figure 5

Normalised transverse emittance change for beams sampled from a 6mm-140MeV/c parent ensemble (LiH, No absorber, Full LH2, Empty LH2)

Preliminary emittance reduction results

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Canonical angular momentum growth across the absorber

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Updated by Lord, Tom 7 months ago · 8 revisions