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Gallardo, J. C.

Paper Title Page
THPMS086 Plasma Lens for US Based Super Neutrino Beam at Either FNAL or BNL 3184
  • A. Hershcovitch, M. Diwan, J. C. Gallardo, B. M. Johnson, H. G. Kirk, W.-T. Weng
    BNL, Upton, Long Island, New York
  • E. Garate, A. van Drie
    University of California IIrvine, Irvine, California
  • S. A. Kahn
    Muons, Inc, Batavia
  • N. Rostoker
    UCI, Irvine, California
  Funding: Work supported under Contract No. DE-AC02-98CH1-886 with the US Department of Energy

Plasma lens concept is examined as an alternative to focusing horns and solenoids for a neutrino beam facility. The concept is based on a combined high-current lens/target configuration. Current is fed at an electrode located downstream from the beginning of the target where pion capturing is needed. Some of the current flows through the target, while the rest is carried by plasma outside the target. A second plasma lens section, with an additional current feed, follows the target. Plasma of this section is immersed in a solenoidal magnetic field to facilitate its current profile shaping to optimize pion capture. Simulation of the second section alone yielded a 10% higher neutrino production than the horn system. Plasma lenses have additional advantages: larger axial currents, high signal purity: minimal neutrino background in anti-neutrino runs. Lens medium consists of plasma, consequently, particle absorption and scattering is negligible. Withstanding high mechanical and thermal stresses is not an issue. Results of capturing and focusing obtained for various plasma lens configurations will be presented.

THPMS090 A Complete Scheme of Ionization Cooling for a Muon Collider 3193
  • R. B. Palmer, J. S. Berg, R. C. Fernow, J. C. Gallardo, H. G. Kirk
    BNL, Upton, Long Island, New York
  • Y. Alexahin, D. V. Neuffer
    Fermilab, Batavia, Illinois
  • S. A. Kahn
    Muons, Inc, Batavia
  • D. J. Summers
    UMiss, University, Mississippi
  Funding: Work Supported by the United States Department of Energy, Contract No. DE-AC02-98CH10886.

We propose a complete scheme for cooling a muon beam for a muon collider. We first outline the parameters required for a multi-TeV muon collider. The cooling scheme starts with the front end of the Study 2a proposed Neutrino Factory. This yields bunch trains of both muon signs. Emittance exchange cooling in upward climbing helical lattices then reduces the longitudinal emittance until it becomes possible to combine the trains into single bunches, one of each sign. Further cooling is now possible in emittance exchange cooling rings. Final cooling to the required parameters is achieved in 50 T solenoids that use high temperature superconductor. Preliminary simulations of each element will be presented.