Study of the stability of Z-pinch implosions with different initial density profiles

A. G. Rousskikh, A. S. Zhigalin, V. I. Oreshkin, N. A. Labetskaya, S. A. Chaikovsky, A. V. Batrakov, G. Yu Yushkov, R. B. Baksht

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16 Citations (Scopus)

Abstract

Stability of metal-puff Z pinches was studied experimentally. Experiments were carried out on a facility producing a load current up to 450 kA with a rise time of 450ns. In a metal-puff Z pinch, the plasma shell is produced due to evaporation of the electrode material during the operation of a vacuum arc. In the experiment to be reported, a single-shell and a shell-on-jet pinch load with magnesium electrodes were used. Two-dimensional, 3 ns gated, visible-light images were taken at different times during the implosion. When the shell was formed from a collimated plasma flow with small radial divergence, Rayleigh-Taylor (RT) instability typical of gas-puff implosions was recorded. The RT instability was completely suppressed in a mode where the initial density distribution of the shell approached a tailored density profile [A. L. Velikovich et al., Phys. Rev. Lett. 77, 853 (1996)].

Original languageEnglish
Article number052701
JournalPhysics of Plasmas
Volume21
Issue number5
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Condensed Matter Physics

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