Stability tests of permanent magnets built with strontium ferrite

Glass, H.; Brown, Bruce; Foster, G. W.; Fowler, W.B.; Gustafson, R.; Jackson, G.; Ostiguy, J.‐F.; Volk, J.

doi:10.1109/pac.1997.753174

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…4, are likely to be a consequence of manufacturing errors caused by material density variations (which would affect magnitude of remanent flux density and not magnetization direction), deviations in the angle of orientations, misalignment in magnetizing fixture, etc. Albeit that these localized effects could also result from thermal influences, which may be a contributory factor in this case, which have been reported in hard ferrites [4]. This paper has illustrated possible measurement errors in the Hall-effect voltage (Fig.…”

Section: Discussionsupporting

confidence: 60%

Sinusoidal behavior of a di-pole magnetization for position sensing applications

Paulides¹,

Lomonova²,

Vandenput³

et al. 2006

INTERMAG 2006 - IEEE International Magnetics Conference

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Position sensing is needed in a large variety of applications, where more specifically Hall-effect position sensors, due to their simplicity and versatility, are elegant solutions. This paper describes a reverse engineering approach to investigate the mismatch in measured Hall-effect voltage of a dipole permanent magnet ring. Using several magnetization patterns, the position signal is reproduced, and it is concluded that by substitution of these patterns, the measured voltage can be recreated.

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Section: Discussionsupporting

confidence: 60%

Sinusoidal behavior of a di-pole magnetization for position sensing applications

Paulides¹,

Lomonova²,

Vandenput³

et al. 2006

INTERMAG 2006 - IEEE International Magnetics Conference

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“…Each has different quadrupole and sextupole fields (see table 1). The basic design consists of precision 2011 JINST 6 T08003 The variation of the magnetic field of Strontium ferrite with temperature [4] was carefully measured by freezing the magnet to 0 C then heating the magnet to 40 • C and allowing it to cool. During this process the magnetic field was continually measured with a Morgan (rotating) coil.…”

Section: Design Criterionmentioning

confidence: 99%

Experiences with permanent magnets at the Fermilab recycler ring

Volk

2011

J. Inst.

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In order to achieve higher luminosities in Run II a separate anti proton storage ring was built in the Main Injector tunnel. To reduce both construction and operations costs permanent magnets were used. This paper discusses the design criterion and specifications, including temperature dependence, longitudinal uniformity, and adjusting of the higher harmonics of the magnets. The design tolerances for a storage ring are more stringent than for a single pass beam line. The difference between the measured and ideal central field for each magnet was held to better than one part in 10 3 . The temperature stability for all magnets was set to better than 1 part in 10 4 per degree Celsius. Higher order harmonics relative to the central field were set to less than 1 part in 10 4 . This was done for all 484 permanent magnet that were built.

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Optics and field error compensation in the FNAL permanent magnet 8.9 GeV/c proton transfer line

Johnstone

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)

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Stability tests of permanent magnets built with strontium ferrite

Cited by 8 publications

References 4 publications

Sinusoidal behavior of a di-pole magnetization for position sensing applications

Sinusoidal behavior of a di-pole magnetization for position sensing applications

Experiences with permanent magnets at the Fermilab recycler ring

Optics and field error compensation in the FNAL permanent magnet 8.9 GeV/c proton transfer line

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