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Time evolution of fields in strontium ferrite permanent magnets

机译:锶铁氧体永磁体中磁场的时间演变

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Field strengths for strontium ferrite permanent magnets built for the FermilabRecycler and 8 GeV transfer line have been measured for the past 4 years. The ferrite magnetization exhibits a time dependence parameterized by M1/M2=-9 x 10-4 x log (t1/t2) as determined from measurements of a gradient magnet. This parameterization has been checked against several other styles of permanent dipoles, and quadrupole magnets with good agreement.

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