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http://dx.doi.org/10.9766/KIMST.2014.17.5.585

A Study on Intial Susceptibility for the Prediction of Vertical Magnetization in Flash D Demagnetization  

Kim, Young-Hak (Department of Electrical Engineering, Pukyong National University)
Doh, Jaewon (Maritime R&D Lab., LIG Nex1 Co., Ltd.)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.17, no.5, 2014 , pp. 585-590 More about this Journal
Abstract
A permanent vertical magnetization should be obtained to counteract induced vertical magnetization due to the earth's background field during the Flash D demagnetization process. A vertical susceptibility is needed to calculate a extra-permanent magnetization, which is needed to control the permanent vertical magnetization in stage 2 of Flash D demagnetization and added to the final vertical permanent magnetization. Two susceptibilities were found in this paper. One is obtained from the extra-magnetization. The other is obtained by magnetic field measurement from the scaled physical vessel when the vessel is excited by vertical magnetic field. The initial susceptibility by the extra-magnetization was 0.101~0.109 and the one from the measured magnetic field was 0.122. Two susceptibilities have a good agreement each other. From this paper, it is found that the susceptibility is able to appllied to calculate the extr-magnetization.
Keywords
Flash D Demagnetization; Vertical Initial Susceptibility; Vertical Permanent Magnetization; Earth Magnetic Field; Physical Scaled Model;
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