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Progression of Magnet Descriptions for Improved MICE Beamline Performance

Explore the evolution of magnet descriptions for the MICE beamline, including the implementation of COSY-style fringe fields, full apertures in muon quads, and comprehensive magnetic maps. Compare Laplace with COSY-style fringe fields for enhanced performance.

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Progression of Magnet Descriptions for Improved MICE Beamline Performance

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  1. MICE Beamline Performance with New Magnet Descriptions Tom Roberts Illinois Institute of Technology March 30, 2004

  2. Progression of Magnet Descriptions • JAN04 was designed using block fields, except for the DecaySolenoid which used the coil field (no iron) • In the New York Meeting I applied a simple Laplace solution for the fringe fields of B1 and B2; since then I have implemented COSY-style fringe fields for bends and quads • Full “rounded +” apertures in the muon quads Q4-Q9 (Q1-Q3 have circular apertures) • Good magnetic map of the DecaySolenoid, including its iron • Good magnetic map of the upstream and downstream magnetic shields

  3. Comparison of Laplace to COSY-style fringe fields All computations have the same integral By dz.

  4. Decay Solenoid Magnetic Map Even without the Iron, the fringe field extends only ~20-30 cm along the axis (r and z scales are quite different)

  5. Downstream Magnetic Shield (r and z scales are different)

  6. Effects of the Improved Descriptions Factor is from the good-mu+ rate.

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