INTERFACIAL FLUID INSTABILITIES IN LASER-IRRADIATED TARGETS
Manoranjan Khan
Departments of Instrumentation Science & Center for Plasma Studies Jadavpur University, Kolkata, India
Abstract. In inertial confinement fusion (ICF) experiment ablatively driven shocks is an important
phenomena for studding equation of state of solids. The interface between two fluids
becomes unstable when driven by impulsively acting force, e.g., gravity. In the former case
it is called Richtmyer-Meshkov (RM) instability and Rayleigh-Taylor (RT) instability in
the latter case. In the nonlinear stage the fluid interface is found to develop structures
having finger like shapes. The structure resembles a bubble (spike) according as lighter
(heavier) fluid pushes in to heavier (lighter) fluid. The dynamics of interfacial instabilities
have been studied for several cases. It has shown that the instability can be mitigated under
certain condition applicable in Inertial Confinement Fusion as well as astrophysical
experiment on intense lasers.
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