Dynamics of an Al Wire Corona of a Megaampere Z-pinch

Kubes, P.; Kravárik, J.; Renner, O.; Krouský, E.; Bakshaev, Yu. L.; Blinov, P. I.; Chernenko, A. S.; Gordeev, E. M.; Dan’ko, S. A.; Korolev, V. D.; Shashkov, A. Yu.
April 2002
Plasma Physics Reports;Apr2002, Vol. 28 Issue 4, p296
Academic Journal
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 120μm 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. © 2002 MAIK “Nauka / Interperiodica”.


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