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Study of magnetic fields and current in the Z pinch at stagnation
AuthorIvanov, Vladimir V.
Anderson, Andrew A.
Astanovitskiy, A. L.
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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.
|Journal Title||Physics of Plasmas|
|Rights||In Copyright (All Rights Reserved)|
|Rights Holder||AIP Publishing LLC.; This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Phys. Plasmas 22, 092710 (2015); https://doi.org/10.1063/1.4931079 Submitted: 04 July 2015 . Accepted: 03 September 2015 . Published Online: 22 September 2015 and may be found at https://doi.org/10.1063/1.4931079.|