A 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.
This is a PDF document
URL http://www-mucool.fnal.gov/mcnotes/public/pdf/muc0343/muc0343.pdf
Posted by S. Alex Bogacz