Study of magnetic fields and current in the Z pinch at stagnation
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Authors
Ivanov, Vladimir V.
Anderson, Andrew A.
Papp, Dóra
Astanovitskiy, A. L.
Nalajala, Vidya
Dmitriev, Oleg
Issue Date
2015
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Article
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Abstract
The structure of magnetic fields in wire-array Z pinches at stagnation was studied using a Faraday rotation diagnostic at the wavelength of 266 nm. The electron plasma density and the Faraday rotation angle in plasma were calculated from images of the three-channel polarimeter. The magnetic field was reconstructed with Abel transform, and the current was estimated using a simple model. Several shots with wire-array Z pinches at 0.5-1.5 MA were analyzed. The strength of the magnetic field measured in plasma of the stagnated pinch was in the range of 1-2 MG. The magnetic field and current profile in plasma near the neck on the pinch were reconstructed, and the size of the current-carrying plasma was estimated. It was found that current flowed in the large-size trailing plasma near the dense neck. Measurements of the magnetic field near the bulge on the pinch also showed current in trailing plasma. A distribution of current in the large-size trailing plasma can prevent the formation of multi-MG fields in the Z pinch. (C) 2015 AIP Publishing LLC.
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Ivanov, V. V., Anderson, A. A., Papp, D., Astanovitskiy, A. L., Nalajala, V., & Dmitriev, O. (2015). Study of magnetic fields and current in the Z pinch at stagnation. Physics of Plasmas, 22(9), 092710. doi:10.1063/1.4931079
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In Copyright (All Rights Reserved)
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1070-664X