Abstract
It is shown that the development of instabilities in a Z-pinch plasma formed by loading a relatively thick Al wire (an initial diameter of 120 µm and a maximum discharge current of 2–3 MA) is slowed down due to the high plasma density in the wire corona. A cylindrically symmetric, regular, and stable corona surrounding the wire contains a helical formation with a dense, cold, and magnetized plasma. X-ray pulses with a photon energy of several keV and an FWHM duration of 10–20 ns are generated by a few imploded neck structures in the pinch phase of the corona evolution (70–100 ns after the current onset). The main part of X radiation emitted by individual bright spots in the photon energy range 1.5–2.4 keV (up to 40 J at a peak power of 4 GW) consists of the continuum and the bound-bound transition radiation from H-and He-like Al ions. A possible scenario for the axial magnetic field evolution during an X-ray pulse is outlined.
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Translated from Fizika Plazmy, Vol. 28, No. 4, 2002, pp. 329–336.
Original Russian Text Copyright © 2002 by Kubeš, Renner, Krouský, Kravárik, Bakshaev, Blinov, Chernenko, Gordeev, Dan’ko, Korolev, Shashkov.
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Kubeš, P., Kravárik, J., Renner, O. et al. Dynamics of an Al wire corona of a megaampere Z-pinch. Plasma Phys. Rep. 28, 296–302 (2002). https://doi.org/10.1134/1.1469170
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DOI: https://doi.org/10.1134/1.1469170