Formation of double shell during implosion of plasma metal puff Z-pinches

D. L. Shmelev, A. S. Zhigalin, S. A. Chaikovsky, V. I. Oreshkin, A. G. Rousskikh

Research output: Contribution to journalArticlepeer-review

Abstract

This work presents the results of experimental and theoretical research of impact of tailored density profile and application of external axial magnetic field on initial spatial distribution of the plasma density in the plasma metal puff Z-pinch and on its implosion dynamics. It has been discovered that upon implosion of the plasma metal puff Z-pinch some stripes interpreted as the system of two coaxial shells appear on the optical images. With the help of numerical simulation, the formation of the plasma liner consisting of a mixture of carbon and bismuth ions and formed by the expansion of the plasma jet of the arc burning on the bismuth electrode has been considered in this work. It has been shown that the lightweight carbon ions facilitate formation of the density distribution smoothly decreasing with the increase in radius, that, in turn, leads to suppression of the Rayleigh-Taylor instability in the current sheath upon further implosion. It has also been demonstrated that availability of the two types of ions in plasma considerably different in mass leads to formation (in the compression phase) of a double shell with externally located heavy ions. It has also been revealed that the application of the external axial magnetic field leads to reduction in the plasma metal puff Z-pinch initial diameter.

Original languageEnglish
Article number092708
JournalPhysics of Plasmas
Volume27
Issue number9
DOIs
Publication statusPublished - 1 Sep 2020

ASJC Scopus subject areas

  • Condensed Matter Physics

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