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Effect of a magnetic field on the growth rate of the Rayleigh–Taylor instability of a laser-accelerated thin ablative surface

Published online by Cambridge University Press:  01 March 2004

N. RUDRAIAH ,
B.S. KRISHNAMURTHY ,
A.S. JALAJA  and
TARA DESAI
N. RUDRAIAH
Affiliation:
National Research Institute for Applied Mathematics, Jayanagar, Bangalore, India University Grants Commission-Center for Advanced Studies in Fluid Mechanics, Department of Mathematics, Bangalore University, Bangalore, India.
B.S. KRISHNAMURTHY
Affiliation:
National Research Institute for Applied Mathematics, Jayanagar, Bangalore, India University Grants Commission-Center for Advanced Studies in Fluid Mechanics, Department of Mathematics, Bangalore University, Bangalore, India.
A.S. JALAJA
Affiliation:
National Research Institute for Applied Mathematics, Jayanagar, Bangalore, India University Grants Commission-Center for Advanced Studies in Fluid Mechanics, Department of Mathematics, Bangalore University, Bangalore, India.
TARA DESAI
Affiliation:
National Research Institute for Applied Mathematics, Jayanagar, Bangalore, India University Grants Commission-Center for Advanced Studies in Fluid Mechanics, Department of Mathematics, Bangalore University, Bangalore, India.
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Abstract

The Rayleigh–Taylor instability (RTI) of a laser-accelerated ablative surface of a thin plasma layer in an inertial fusion energy (IFE) target with incompressible electrically conducting plasma in the presence of a transverse magnetic field is investigated using linear stability analysis. A simple theory based on Stokes-lubrication approximation is proposed. It is shown that the effect of a transverse magnetic field is to reduce the growth rate of RTI considerably over the value it would have in the absence of a magnetic field. This is useful in the extraction of IFE efficiently.

Keywords

Ablative surfaceInertial fusion energyLaser accelerationRayleigh–Taylor instability
Type
Research Article
Information
Laser and Particle Beams , Volume 22 , Issue 1 , March 2004 , pp. 29 - 33
Copyright
2004 Cambridge University Press

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