Theoretical and experimental study of Eddy current and dynamic deformation of conducting plate

At plasma disruption of a Tokamak Fusion Reactor eddy current is induced in metalic structures (first wall, divertor plate, blanket vessel and shielding structure) surrounding plasmas. The eddy current causes a transient electromagnetic force in the structures due to an interaction with magnetic fie...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1985-11, Vol.21 (6), p.2265-2268
Main Authors: Minato, A., Someya, K., Miya, K., Tone, T.
Format: Article
Language:English
Subjects:
Eddy currents
Electromagnetic forces
Electromagnetic transients
Fusion reactors
Geometry
Magnetic shielding
Plasmas
Strain measurement
Stress
Tokamaks
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Summary:At plasma disruption of a Tokamak Fusion Reactor eddy current is induced in metalic structures (first wall, divertor plate, blanket vessel and shielding structure) surrounding plasmas. The eddy current causes a transient electromagnetic force in the structures due to an interaction with magnetic field. The magnitude of dynamic deformation depends on a time constant of the eddy current and geometry of the structures as well as boundary conditions. Electromagnetic stress caused by the dynamic deformation is a critical factor to lifetime of the structures. Thus, the electromagnetic stress should be estimated as accurately as possible in order to assure the integrity of the structures. In this study experimant has been performed to simulate the dynamic magnetomechanical behavior of the structures with use of the transient electromagnetic force. The eddy current and the deflection of a conducting plate(cantilever) obtained by the experiment have been compared with numerical results to verify the agreement between the numerical analysis and the measured strain.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1985.1064194