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Stability of plasma liner implosion

Published online by Cambridge University Press:  07 March 2001

I.V. GLAZYRIN ,
O.V. DIYANKOV ,
N.G. KARLYKHANOV ,
S.V. KOSHELEV ,
I.V. KRASNOGOROV ,
A.N. SLESAREVA  and
M.S. TIMAKOVA
I.V. GLAZYRIN
Affiliation:
Russian Federal Nuclear Center—VNIITF, P.O. Box 245, Snezhinsk, Chelyabinsk Region, Russia
O.V. DIYANKOV
Affiliation:
Russian Federal Nuclear Center—VNIITF, P.O. Box 245, Snezhinsk, Chelyabinsk Region, Russia
N.G. KARLYKHANOV
Affiliation:
Russian Federal Nuclear Center—VNIITF, P.O. Box 245, Snezhinsk, Chelyabinsk Region, Russia
S.V. KOSHELEV
Affiliation:
Russian Federal Nuclear Center—VNIITF, P.O. Box 245, Snezhinsk, Chelyabinsk Region, Russia
I.V. KRASNOGOROV
Affiliation:
Russian Federal Nuclear Center—VNIITF, P.O. Box 245, Snezhinsk, Chelyabinsk Region, Russia
A.N. SLESAREVA
Affiliation:
Russian Federal Nuclear Center—VNIITF, P.O. Box 245, Snezhinsk, Chelyabinsk Region, Russia
M.S. TIMAKOVA
Affiliation:
Russian Federal Nuclear Center—VNIITF, P.O. Box 245, Snezhinsk, Chelyabinsk Region, Russia
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Abstract

A computational analysis is performed to investigate the suppression mechanism of magnetohydrodynamic (MHD) instability. Three different techniques have been considered which allow us to reduce the total growth of the instability: 1. doublecascades liner; 2. linear rotation and 3. externally generated axial magnetic field. Double gas-puff with specifically structured density: massive inner shell and light outer one for a given current shape makes it possible to suppress significantly the MHD instability evolution. Possible mechanism of the instability dumping has been proposed. The load design is being analyzed for the case of liner rotation with initial angular velocity. Different values of the velocities have been considered. The using of an external magnetic field allows us to suppress the instability when the field reaches the specified shape and optimal value. The estimation of the fraction of magnetic energy and energy of rotation in the full energy of the liner is done. The influence of axial field on MHD instability growth is analyzed.

Type
ZABABAKHIN SPECIAL PAPERS
Information
Laser and Particle Beams , Volume 18 , Issue 2 , April 2000 , pp. 261 - 267
Copyright
© 2000 Cambridge University Press

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