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Neutrino Factory/Muon Collider Document 502-v1

Muon Acceleration in a ‘Dogbone’ RLA – Beam Dynamics Issues

Document #:
NFMCC-doc-502-v1
Document type:
Technical Note
Submitted by:
Liz Buckley-Geer
Updated by:
Liz Buckley-Geer
Document Created:
12 Oct 2006, 14:24
Contents Revised:
12 Oct 2006, 14:24
Metadata Revised:
12 Oct 2006, 14:24
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Abstract:
conceptual design of an RLA based muon accelerator complex is presented. The scheme involves three superconducting linacs (200 MHz): a single pass linear Pre-accelerator followed by a pair of multi-pass ‘Dogbone’ recirculating linacs (RLA). In the presented scenario, acceleration starts after ionization cooling at 273 MeV/c and proceeds to 12.6 GeV, where the beam may be injected into an FFAG ring for further acceleration. The Pre-accelerator captures a large muon phase space coming from the cooling channel. It accelerates muons to relativistic energies, while adiabatically decreasing the phase-space volume, so that effective acceleration in recirculating linacs is possible. The ‘Dogbone’ RLAs further compress and shape-up the longitudinal and transverse phase-spaces, while increasing the energy. The proposed ‘Dogbone’ RLA configuration facilitates simultaneous acceleration of both muon charge species through the requirement of mirror symmetric optics of the return ‘droplette’ arcs.
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