  We use analytic and numerical methods to analyze the dynamics of vortices
following the quench of a Type-II superconductor under the application of an
external magnetic field. In three dimensions, in the absence of a field, the
spacing between vortices scales with time t with an exponent phi=0.414 +/-
0.01, In a thin sheet of superconductor, the scaling exponent is phi=0.294 +/-
0.01. When an external magnetic field h is applied, the vortices are confined
with respect to the length scale of the Abrikosov lattice, leading to a
crossover between the power-law scaling length scale and the lattice length
scale. From this we suggest a one-parameter scaling of dr/dt with h and r that
is consistent with numerical data.

Superconductivity