| Paper | Title | Page |
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| WEPTY029 | Measurements of Strontium Ferrite Hybrid Permanent Magnet Quadrupoles after Removal for the Fermilab NOvA Upgrade in 2012 | 3331 |
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Funding: Fermi National Accelerator Laboratory During the 2012 NOvA upgrade forty strontium ferrite hybrid permanent magnet quadrupoles from the injection, extraction and electron cooling regions of the Recycler accelerator, which had been measured in 2000 and subsequently installed in the tunnel, were replaced. The basic design of the quadrupoles * and expected decay rate ** are described in design documents. Nine of these magnets, of varying strength were measured in 2014. Measurements were made with a modified rotating coil in a fashion similar to their initial pre-installation measurements in 2000. The 2014 measurements are compared to the 2000 measurements and the expected decay. Many of these quadrupoles, as well as other strontium ferrite hybrid permanent magnets are still in operation in the Recycler and tranfer line, so understanding the rate at which the strength changes is significant to the future operation of the Recycler. * Hybrid Permanent Quadrupoles for the. 8 GeV Transfer Line at Fermilab. (S.M. Pruss et al.) ** Time Evolution of Fields in Strontium Ferrite Permanent Magnets (J. T. Volk et al.) |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY029 | |
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