Evolution of MHD Instabilities in Plasma Imploding Under Magnetic Field

Author

Osin, D. ; Kroupp, Eyal ; Starobinets, A. ; Rosenzweig, G. ; Alumot, D. ; Maron, Y. ; Fisher, A. ; Yu, E. ; Giuliani, J.L. ; Deeney, C.

Author_Institution

Weizmann Inst. of Sci., Rehovot, Israel

Volume

39

Issue

11

fYear

2011

Firstpage

2392

Lastpage

2393

Abstract

Two-dimensional 3-ns-gated visible images, recorded at different times during the implosion of plasma under azimuthal magnetic field (Z-pinch), revealed ringlike instabilities followed by the development of axially and azimuthally nonuniform structures in the imploding plasma. Remarkably, the evolution in time of all structures was found to be highly repeatable in different shots, which should allow, through 3-D magnetohydrodynamics modeling, for systematically studying the development in time of these complex phenomena and correlating them with the initial plasma parameters. The data are also used to infer the time-dependent outer plasma radius and plasma radial velocities.

Keywords

Z pinch; plasma diagnostics; plasma instability; plasma magnetohydrodynamics; plasma simulation; 2D visible images; 3D magnetohydrodynamics modeling; Z-pinch; axially nonuniform structures; azimuthal magnetic field; azimuthally nonuniform structures; plasma MHD instability evolution; plasma implosion; ringlike instabilities; time dependent outer plasma radius; time dependent plasma radial velocities; Arrays; Charge coupled devices; Magnetic resonance imaging; Magnetohydrodynamics; Plasma measurements; Plasmas; $Z$-pinch; Plasma implosion; visible imaging;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2011.2159019

Filename

5937053