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>A review of the ablative stabilization of the Rayleighndash;Taylor instability in regimes relevant to inertial confinement fusion
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A review of the ablative stabilization of the Rayleighndash;Taylor instability in regimes relevant to inertial confinement fusion
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机译：A review of the ablative stabilization of the Rayleighndash;Taylor instability in regimes relevant to inertial confinement fusion
It has been recognized for many years that the most significant limitation of inertial confinement fusion (ICF) is the Rayleighndash;Taylor (RT) instability. It limits the distance an ablatively driven shell can be moved to several times its initial thickness. Fortunately material flow through the unstable region at velocityvAreduces the growth rate to sqrt;kg/1+kLminus;bgr;kvAwith bgr; from 2ndash;3. In recent years experiments using both xhyphen;ray drive and smoothed laser drive to accelerate foils have confirmed the communityrsquo;s understanding of the ablative RT instability in planar geometry. The growth of small initial modulations on the foils is measured for growth factors up to 60 for direct drive and 80 for indirect drive. For xhyphen;ray drive large stabilization is evident. After some growth, the instability enters the nonlinear phase when mode coupling and saturation are also seen and compare well with modeling. Normalized growth rates for direct drive are measured to be higher, but strategies for reduction by raising the isentrope are being investigated. For direct drive, high spatial frequencies are imprinted from the laser beam and amplified by the RT instability. Modeling shows an understanding of this lsquo;lsquo;laser imprinting.rsquo;rsquo;
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