Final cooling for a high-energy high-luminosity lepton collider

Journal Article · 10 July 2017 · Journal of Instrumentation

DOI: https://doi.org/10.1088/1748-0221/12/07/T07003 · OSTI ID:1244524

Neuffer, David ^[1]; Sayed, Hisham ^[2]; Acosta, J. ^[3]; Hart, T. ^[3]; Summers, Don ^[3]

---

1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)
3. Univ. of Mississippi, Oxford, MS (United States)

Here, a high-energy muon collider requires a 'final cooling' system that reduces transverse emittance by a factor of ~ 10, while allowing the longitudinal emittance to 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.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1244524
• Alternate ID(s): OSTI ID: 22656284
• Report Number(s): FERMILAB-PUB--15-524-AD-APC; arXiv:1612.08960; 1507168
• Journal Information: Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 07 Vol. 12; ISSN 1748-0221
• Publisher: Institute of Physics (IOP)Copyright Statement
• Country of Publication: United States
• Language: English