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Ionization cooling in the muon collider

Technical Report ·
DOI:https://doi.org/10.2172/419071· OSTI ID:419071
The muon beams in a high luminosity muon collider are produced with a very large emittance. The process of ionization cooling offers a method for reducing the 6-dimensional normalized emittance of the beam by a factor of {approx} 10{sup 6}. A simple analytic theory has been developed that demonstrates the dependence of the net cooling on various experimental parameters. The simple theory has been checked and realistic arrangements have been examined using Monte Carlo simulations. Transverse cooling of the initial beam can be achieved using passive Li absorbers in a FOFO lattice. The last factor of 10 in transverse cooling probably requires the use of current-carrying Li lenses. Efficient longitudinal cooling requires the use of wedge shaped absorbers in a dispersive section of the beam line. An example, multi-stage cooling scenario has been developed that meets the requirements of the muon collider. Preliminary designs have been made of solenoids for use in the FOFO lattice and of solenoids and dipoles for use in the emittance exchange sections. Detailed simulation work, farther optimization, and preparations for experimental demonstrations of critical components are currently in progress.
Research Organization:
Brookhaven National Lab., Upton, NY (United States); Fermi National Accelerator Lab., Batavia, IL (United States); Lawrence Berkeley Lab., CA (United States)
Sponsoring Organization:
USDOE Office of Energy Research, Washington, DC (United States)
DOE Contract Number:
AC02-76CH00016; AC02-76CH03000; AC03-76SF00098
OSTI ID:
419071
Report Number(s):
BNL--63615; CAP--153-MUON-96R; ON: DE97001953
Country of Publication:
United States
Language:
English

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