Experiments on the Sandia National Laboratories Saturn pulsed power machine
have produced high-velocity Z-pinch plasma implosions of krypton gas puffs
from a circular nozzle, We use the three-dimensional (3-D), time-dependent
MACH3 magnetohydrodynamics code to simulate these experiments. Generally,
the quality of Z-pinch implosions is degraded by hydromagnetic Rayleigh-Tay
lor instabilities, The images displayed in this paper illustrate the growth
in time of this instability in three spatial dimensions from a modest (and
realistic) initial 3-D perturbation.