  We perform SU(3) Lattice Gauge Theory simulations of the deconfinement
transition attempting to mimic conditions encountered in heavy ion collisions.
Specifically, we perform a sudden temperature quench across the deconfinement
temperature, and follow the response of the system in successive simulation
sweeps under spatial lattice expansion and temperature fall-off. In
measurements of the Polyakov loop and structure functions a robust strong
signal of global instability response is observed through the exponential
growth of low momentum modes. Development of these long range modes isotropizes
the system which reaches thermalization shortly afterwards, and enters a stage
of quasi-equilibrium expansion and cooling till its return to the confinement
phase. The time scale characterizing full growth of the long range modes is
largely unaffected by the conditions of spatial expansion and temperature
variation in the system, and is much shorter than the scale set by the interval
to return to the confinement phase. The wide separation of these two scales is
such that it naturally results in isotropization times well inside 1 fm/c.
