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MICE Beamline Performance with New Magnet Descriptions

MICE Beamline Performance with New Magnet Descriptions. Tom Roberts Illinois Institute of Technology March 30, 2004. Progression of Magnet Descriptions. JAN04 was designed using block fields, except for the DecaySolenoid which used the coil field (no iron)

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MICE Beamline Performance with New Magnet Descriptions

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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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