Rayleigh-Taylor instabilities in inertial-confinement fusion targets

This paper reports calculations of the growth of Rayleigh-Taylor instabilities (1) in the ablator-pusher region such as may be caused by irregularities in an electron beam, and (2) in the pusher fuel interface, a problem common to all inertial confinement fusion targets. For the first case, it is found that shallow density gradients and scattering of the beam by the target, both stabilize the shorter wavelength instabilities, which would otherwise grow the most rapidly. In the second case, it is found that moderately short wavelength instabilities may not degrade the target performance as much as has previously been supposed. (auth.)