Time evolution of fields in strontium ferrite permanent magnets

Time evolution of fields in strontium ferrite permanent magnets

Field strengths for strontium ferrite permanent magnets built for the Fermilab Recycler and the 8 GeV transfer line have been measured for the past 4 years. The ferrite magnetization exhibits a time dependence parameterized by M1/M/sub 2/ = -9 /spl times/ 10/sup -4/ /spl times/ log (t/sub 1//t/sub 2...

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Bibliographische Detailangaben
Hauptverfasser: Volk, J.T., Brown, B.C., Foster, G.W., Fowler, W., Glass, H.D., Jackson, G.P.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Apertures
Ferrites
Glass
Magnetic field measurement
Magnetization
Magnetosphere
Permanent magnets
Production
Strontium
Time measurement
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Beschreibung
Zusammenfassung:Field strengths for strontium ferrite permanent magnets built for the Fermilab Recycler and the 8 GeV transfer line have been measured for the past 4 years. The ferrite magnetization exhibits a time dependence parameterized by M1/M/sub 2/ = -9 /spl times/ 10/sup -4/ /spl times/ log (t/sub 1//t/sub 2/) 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.
DOI:10.1109/PAC.2001.988062