Challenges in measuring the longitudinal field profile of a magnet by a vibrating wire

Pasquale Arpaia, Domenico Caiazza, Carlo Petrone, Stephan Russenschuck

Abstract

A vibrating wire is used to measure the longitudinal profile of the magnetic flux density in the aperture of a non-periodical structure such as a quadrupole accelerator magnet. Limitations in terms of measurement repeatability and uncertainty are observed. The possible causes are investigated by experimental characterization of the measurement system. Uncertainty sources are identified and particular cases are reported in which the mathematical assumptions are no longer valid. The challenges are discussed and measures are proposed to improve the metrological performance.

Keywords

magnetic measurement, accelerator magnets, vibrating wire, longitudinal field profile

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IMEKO-TC4-2014-511.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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