Magnets

Superconducting Magnets/Muon Colliders

Paper Title Page
MPPT057 Design of a Magnet System for a Muon Cooling Ring 3366
 
  • S.A. Kahn, H.G. Kirk
    BNL, Upton, Long Island, New York
  • D. Cline, A.A. Garren
    UCLA, Los Angeles, California
  • F.E. Mills
    Fermilab, Batavia, Illinois
  
  Funding: This work was performed with the support of the U.S. DOE under Contract No. DE-AC02-98CH10886.

A hydrogen gas filled muon cooling ring appears to be a promising approach to reducing the emittance of a muon beam for use in a neutrino factory or a muon collider. A small muon cooling ring is being studied to test the feasibility of cooling by this method. This paper describes the magnet system to circulate the muons. The magnet design is optimized to produce a large dynamic aperture to contain the muon beam with minimum losses. Muons are tracked through the field to verify the design.

 
MPPT058 Progress on the Focus Coils for the MICE Channel 3417
 
  • M.A. Green
    LBNL, Berkeley, California
  • Y. Ivanyushenkov
    CCLRC/RAL, Chilton, Didcot, Oxon
  • W. Lau, R. Senanayake, S.Q. Yang
    OXFORDphysics, Oxford, Oxon
  
  Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC03-76SF00098.

This report describes the progress on the magnet part of the absorber focus coil module for the international Muon Ionization Cooling Experiment (MICE). MICE consists of two cells of a SFOFO cooling channel that is similar to that studied in the level 2 study of a neutrino factory. The MICE absorber focus coil module consists of a pair of superconducting solenoids, mounted on an aluminum mandrel. The coil package that is in its own vacuum vessel surrounds an absorber, which does the ionization cooling of the muons. Either a liquid or solid absorber is within a separate vacuum vessel that is within the warm bore of the superconducting magnet. The superconducting focus coils may either be run in the solenoid mode (with the two coils at the same polarity) or in the flip mode (with the coil at opposite polarity causing the field direction to flip within the magnet bore). The superconducting coils will be cooled using a pair of small 4 K coolers. This report discusses the progress on the MICE focusing magnets, the magnet cooling system and the magnet current supply system.

 
MPPT059 Progress on the Coupling Coil for the MICE Channel 3468
 
  • M.A. Green, D. Li, S.P. Virostek, M.S. Zisman
    LBNL, Berkeley, California
  • Y. Ivanyushenkov
    CCLRC/RAL, Chilton, Didcot, Oxon
  • W. Lau, A. E. White, H. Witte, S.Q. Yang
    OXFORDphysics, Oxford, Oxon
  
  Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC03-76SF00098.

This report describes the progress on the coupling coil module for the international Muon Ionization Cooling Experiment (MICE). MICE consists of two cells of a SFOFO cooling channel that is similar to that studied in the level 2 study of a neutrino factory. The MICE RF coupling coil module consists of a superconducting solenoid, mounted around four cells of conventional 201.25 MHz closed RF cavities. This report discusses the progress that has been made on the superconducting coupling coil that is around the center of the RF coupling module. This report also describes the process one would use to cool the coupling coil using a single small 4 K cooler. The coupling magnet power system and quench protections system is also described.