On the magnetic polarizability tensor of US coinage

John L Davidson; Omar A Abdel-Rehim; Peipei Hu; Liam A Marsh; Michael D O’Toole; Anthony J Peyton

doi:10.1088/1361-6501/aa9cf2

On the magnetic polarizability tensor of US coinage

John L Davidson, Omar A Abdel-Rehim, Peipei Hu, Liam A Marsh, Michael D O’Toole, Anthony J Peyton

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Abstract

The magnetic dipole polarizability tensor of a metallic object gives unique information about the size, shape and electromagnetic properties of the object. In this paper, we present a novel method of coin characterization based on the spectroscopic response of the absolute tensor. The experimental measurements are validated using a combination of tests with a small set of bespoke coin surrogates and simulated data. The method is applied to an uncirculated set of US coins. Measured and simulated spectroscopic tensor responses of the coins show significant differences between different coin denominations. The presented results are encouraging as they strongly demonstrate the ability to characterize coins using an absolute tensor approach.

Original language	Undefined
Pages (from-to)	035501
Number of pages	1
Journal	Measurement Science and Technology
Volume	29
Issue number	3
Early online date	13 Feb 2018
DOIs	https://doi.org/10.1088/1361-6501/aa9cf2
Publication status	Published - 1 Mar 2018

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10.1088/1361-6501/aa9cf2

JohnDavidsonTensorsOfCoinsManuscript-20-11-17Accepted author manuscript, 2.45 MB

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AU - Davidson, John L

AU - Abdel-Rehim, Omar A

AU - Hu, Peipei

AU - Marsh, Liam A

AU - O’Toole, Michael D

AU - Peyton, Anthony J

PY - 2018/3/1

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N2 - The magnetic dipole polarizability tensor of a metallic object gives unique information about the size, shape and electromagnetic properties of the object. In this paper, we present a novel method of coin characterization based on the spectroscopic response of the absolute tensor. The experimental measurements are validated using a combination of tests with a small set of bespoke coin surrogates and simulated data. The method is applied to an uncirculated set of US coins. Measured and simulated spectroscopic tensor responses of the coins show significant differences between different coin denominations. The presented results are encouraging as they strongly demonstrate the ability to characterize coins using an absolute tensor approach.

AB - The magnetic dipole polarizability tensor of a metallic object gives unique information about the size, shape and electromagnetic properties of the object. In this paper, we present a novel method of coin characterization based on the spectroscopic response of the absolute tensor. The experimental measurements are validated using a combination of tests with a small set of bespoke coin surrogates and simulated data. The method is applied to an uncirculated set of US coins. Measured and simulated spectroscopic tensor responses of the coins show significant differences between different coin denominations. The presented results are encouraging as they strongly demonstrate the ability to characterize coins using an absolute tensor approach.

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On the magnetic polarizability tensor of US coinage

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Electromagnetic Sensing Group

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On the magnetic polarizability tensor of US coinage

Abstract

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Electromagnetic Sensing Group

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