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Drumm, P.

Paper Title Page
TPPP018 Progress on the MICE Liquid Absorber Cooling and Cryogenic Distribution System 1601
 
  • M.A. Green
    LBNL, Berkeley, California
  • E. Baynham, T.W. Bradshaw, P. Drumm, Y. Ivanyushenkov
    CCLRC/RAL, Chilton, Didcot, Oxon
  • M.A.C. Cummings
    Northern Illinois University, DeKalb, Illinois
  • S. Ishimoto
    KEK, Ibaraki
  • W. Lau, 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 made on the design of the liquid hydrogen absorber for the international Muon Ionization Cooling Experiment (MICE). The absorber consists of a 21-liter vessel that contains liquid hydrogen (1.5 kg) or liquid helium (2.63 kg). The cryogen vessel is within the warm bore of the superconducting focusing magnet for the MICE. The purpose of the magnet is to provide a low beam beta region within the absorber. For safety reasons, the vacuum vessel for the hydrogen absorber is separated from the vacuum vessel for the superconducting magnet and the vacuum that surrounds the RF cavities or the detector. The absorber has two 300 mm-diameter thin aluminum windows. The vacuum vessel around the absorber has a pair of thin aluminum windows that separate the absorber vacuum space from adjacent vacuum spaces. Because the muon beam in MICE is of low intensity, there is no beam heating in the absorber. As a result, the absorber can be cooled using a single 4 K cooler. This report describes progress on the MICE liquid absorber and its cryogenic cooling system.

 
ROAA004 MICE: The International Muon Ionisation Cooling Experiment 398
 
  • P. Drumm
    CCLRC/RAL, Chilton, Didcot, Oxon
  
  Muon storage rings have been proposed for use as sources of intense high-energy neutrino beams and as the basis for multi-TeV lepton-antilepton colliding beam facilities. To optimise the performance of such facilities is likely to require the phase-space compression (cooling) of the muon beam prior to acceleration and storage. The short muon-lifetime makes it impossible to employ traditional techniques to cool the beam while maintaining the muon-beam intensity. Ionisation cooling, a process in which the muon beam is passed through a series of liquid hydrogen absorbers followed by accelerating RF-cavities, is the technique proposed to cool the muon beam. The international Muon Ionisation Cooling Experiment (MICE) collaboration has been formed to carry out a muon-cooling demonstration experiment, and its proposal to Rutherford Appleton Laboratory has been approved. The MICE cooling channel, the instrumentation and the implementation at the Rutherford Appleton Laboratory is described together with the predicted performance of the channel and the measurements that will be made.  
RPPT067 A High-Power Target Experiment 3745
 
  • H.G. Kirk, S.A. Kahn, H. Ludewig, R. Palmer, V. Samulyak, N. Simos, T. Tsang
    BNL, Upton, Long Island, New York
  • J.R.J. Bennett
    CCLRC/RAL/ASTeC, Chilton, Didcot, Oxon
  • T.W. Bradshaw, P. Drumm, T.R. Edgecock, Y. Ivanyushenkov
    CCLRC/RAL, Chilton, Didcot, Oxon
  • I. Efthymiopoulos, A. Fabich, H. Haseroth, F. Haug, J. Lettry
    CERN, Geneva
  • T.A. Gabriel, V.B. Graves, J.R. Haines, P.T. Spampinato
    ORNL, Oak Ridge, Tennessee
  • Y. Hayato, K. Yoshimura
    KEK, Ibaraki
  • K.T. McDonald
    PU, Princeton, New Jersey
  
  Funding: U.S. Department of Energy.

We describe an experiment designed as a proof-of-principle test for a target system capable of converting a 4 MW proton beam into a high-intensity muon beam suitable for incorporation into either a neutrino factory complex or a muon collider. The target system is based on exposing a free mercury jet to an intense proton beam in the presence of a high strength solenoidal field.