17–22 May 2026
C.I.D
Europe/Zurich timezone

A Charge-Agnostic Design for 6D Muon Ionization Cooling

WEP1346
20 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC1.A09: Muon Accelerators, Neutrino Factories, Muon Colliders Poster session

Speaker

Caroline Riggall (University of Tennessee at Knoxville)

Description

A muon collider presents a compelling path forward for high-energy physics, offering both energy reach and precision. A notable challenge in realizing the target luminosities for a muon collider is in the development of a sufficiently fast cooling scheme – one capable of several orders of magnitude in emittance reduction with minimal decay losses. Ionization cooling is presently considered the only scheme to fit this criterion. Traditional ionization cooling channels are characterized by a solenoid-based lattice for beam focusing and a low-Z absorbing material wherein the beam deposits energy via ionization. Dipole fields are used to generate dispersion such that higher-momentum muons pass through more absorbing material, enabling 6D cooling by leveraging emittance exchange. The problem with this approach is the charge-specificity of the dispersion function, necessitating separate channels for each sign of muon. Here, the Helical FOFO Snake (HFOFO) is presented as an alternative approach to 6D cooling that agnostically treats both signs of muon, resulting in a single initial cooling channel. Recent work in reviving and optimizing the HFOFO design for integration with current muon collider plans is discussed.

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Author

Caroline Riggall (University of Tennessee at Knoxville)

Co-authors

David Neuffer (Fermi National Accelerator Laboratory) Diktys Stratakis (Fermi National Accelerator Laboratory) Katsuya Yonehara (Fermi National Accelerator Laboratory) Lawrence Lee (University of Tennessee at Knoxville) Rithika Ganesan (University of Tennessee at Knoxville) Tova Holmes (University of Tennessee at Knoxville)

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