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Browse Journals & Magazines > Magnetics, IEEE Transactions ...> Volume:25 Issue:2 Help

Studies of time dependence of fields in Tevatron superconducting dipole magnets

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6 Author(s)
Hanft, R.W. ; Fermi Nat. Accel. Lab., Batavia, IL, USA ; Brown, B.C. ; Herrup, D.A. ; Lamm, M.J.
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The time variation in the magnetic field of a model Tevatron dipole magnet at constant excitation current has been studied. Variations in symmetry allowed harmonic components over long time ranges show a log t behavior indicative of `flux creep'. Both short-time-range and long-time-range behavior depend on the excitation history. Similar effects are seen in the remnant fields present in full-scale Tevatron dipoles following current ramping. Both magnitudes and time dependences are observed to depend on details such as ramp rate, flattop duration, and number of ramps. In a few magnets, variations are also seen in symmetry-disallowed harmonics

Published in:
Magnetics, IEEE Transactions on  (Volume:25 ,  Issue: 2 )

Date of Publication: Mar 1989

Page(s):
1647 - 1651
ISSN :
0018-9464
INSPEC Accession Number:
3410418
Digital Object Identifier :
10.1109/20.92616
Date of Current Version :
06 August 2002
Issue Date :
Mar 1989
Sponsored by :
IEEE Magnetics Society

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