Final Cooling for a High-Energy High-Luminosity Lepton Collider

A high-energy muon collider scenario require a "final cooling" system that reduces transverse emittance by a factor of ~10 while allowing longitudinal emittance increase. The baseline approach has low-energy transverse cooling within high-field solenoids, with strong longitudinal heating....

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Bibliographic Details
Published in:arXiv.org 2016-12
Main Authors: Neuffer, David, Sayed, Hisham, Hart, Terry, Summers, Don
Format: Article
Language:English
Subjects:
Coalescing
Cooling
Emittance
Heat exchange
Heating
Leptons
Luminosity
Quadrupoles
Slicing
Solenoids
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Summary:A high-energy muon collider scenario require a "final cooling" system that reduces transverse emittance by a factor of ~10 while allowing longitudinal emittance increase. The baseline approach has low-energy transverse cooling within high-field solenoids, with strong longitudinal heating. This approach and its recent simulation are discussed. Alternative approaches which more explicitly include emittance exchange are also presented. Round-to-flat beam transform, transverse slicing, and longitudinal bunch coalescence are possible components of an alternative approach. Wedge-based emittance exchange could provide much of the required transverse cooling with longitudinal heating. Li-lens and quadrupole focusing systems could also provide much of the required final cooling.
ISSN:2331-8422
DOI:10.48550/arxiv.1612.08960