Magnetic flux shielding for the precision muon g-2 storage ring superconducting inflector

A muon g-2 experiment (E821) at the AGS requires knowledge of the magnetic field over muon orbits at the level of 0.1 ppm. The superconducting inflector involves a double cosine theta winding; this design approximately cancels its fringe field. Nevertheless its residual field would effect the homoge...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1994-07, Vol.30 (4), p.1766-1769
Main Authors: Danby, G.T., Meng, W., Sampson, W.B., Woodle, K.
Format: Article
Language:English
Subjects:
Cyclic accelerators and storage rings
Exact sciences and technology
Experimental methods and instrumentation for elementary-particle and nuclear physics
Iron
Laboratories
Magnetic fields
Magnetic flux
Magnetic shielding
Material storage
Mesons
Nuclear physics
Orbits
Physics
Storage rings
Superconducting magnets
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Summary:A muon g-2 experiment (E821) at the AGS requires knowledge of the magnetic field over muon orbits at the level of 0.1 ppm. The superconducting inflector involves a double cosine theta winding; this design approximately cancels its fringe field. Nevertheless its residual field would effect the homogeneity of the storage ring magnetic field. A method of using a superconducting sheet surrounding the inflector to further reduce the fringe field was proposed by one of the authors, W. Meng. An experimental program to explore this technique is described. Part of the test results are presented.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.305599