[其它]87 STUDY OF CHARACTERISTICS OF WIRE ARRAY COMPRESSION IN R-Z AND R-PHI GEOMETRIES

STUDY OF CHARACTERISTICS OF WIRE ARRAY COMPRESSION IN R-Z AND R-PHI GEOMETRIES ]f6,4[  
I.V.Glazyrin, N.G.Karlykhanov, A.N.Slesareva A#gy[.Bb  
Russian Federal Nuclear Center - VNIITF, juQ?k xOB  
P.O.Box 245, Snezhinsk, Chelyabinsk Region, Russia AG|:mQO  
Abstract )BZ6QO`5n  
Influence of different types of instabilities on dynamics of wire array compression in r-z and r-phi geometry is analyzed by numerical simulation: (1) overheating instability at the initial stage of wire explosion leads to non-uniform density; (2) RM instability connected with shock wave interaction with core-corona interface results in more non-uniform wire explosion; (3) a sequence of hydrodynamics instabilities (RT, RM, Kelvin-Helmholtz) with magnetic field existence developing in plasma shell in r-phi case forms a pipe-type structures in plasma; (4) MHD RT instability in r-z geometry plays the main role in decreasing X-ray radiation. Evolution of compression of wire array has been studied with radiation 2D MHD code. Results of numerical simulation have been compared with experimental data obtained on generators ANGARA (TRINITI, Russia). jxZ_-1  
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