| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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New Method for 3D Transient Eddy Current Field Calculation and Its Application in Magneto-Acoustic Tomography |
| Yuan-Yuan Li1,2, Guo-Qiang Liu1,2**, Hui-Xia1**, Li-Li Hu1 |
1Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190
2University of Chinese Academy of Sciences, Beijing 100190
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| Cite this article: |
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Yuan-Yuan Li, Guo-Qiang Liu, Hui-Xia et al 2017 Chin. Phys. Lett. 34 117201 |
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Abstract A new method of 3D transient eddy current field calculation is proposed. The Maxwell equations with time component elimination (METCE) are derived under the assumption of magnetic quasi static approximation, especially for the sample of low conductivity. Based on METCE, we deduce a more efficient reconstruction algorithm of a 3D transient eddy current field. The computational burden is greatly reduced through the new algorithm, and the computational efficiency is improved. This new algorithm decompounds the space-time variables into two individual variables. The idea is to solve the spatial vector component firstly, and then multiply it by the corresponded time component. The iterative methods based on METCE are introduced to recover the distribution of conductivity in magneto-acoustic tomography. The reconstructed images of conductivity are consistent with the original distribution, which validate the new method.
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Received: 03 May 2017
Published: 25 October 2017
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| PACS: |
72.55.+s
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(Magnetoacoustic effects)
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43.35.Rw
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(Magnetoacoustic effect; oscillations and resonance)
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41.20.Cv
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(Electrostatics; Poisson and Laplace equations, boundary-value problems)
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87.57.nf
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(Reconstruction)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 51137004, 61427806 and 51577184, and the Equipment Development Project of Chinese Academy of Sciences under Grant No YZ201507. |
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