  The compression and stability of plasma targets for the plasma jet-induced
magneto-inertial fusion (PJMIF) have been investigated via large scale
simulations using the FronTier code capable of explicit tracking of material
interfaces. In the PJMIF concept, a plasma liner, formed by the merger of a
large number of radial, highly supersonic plasma jets, implodes on a magnetized
plasma target and compresses it to conditions of the fusion ignition. A
multi-stage computational approach for simulations of the liner-target
interaction and the compression of plasma targets has been developed to
minimize computing time. Simulations revealed important features of the target
compression process, including instability and disintegration of targets. The
non-uniformity of the leading edge of the liner, caused by plasma jets as well
as oblique shock waves between them, leads to instabilities during the target
compression. By using front tracking, the evolution of targets has been studied
in 3-dimensional simulations. Optimization studies of target compression with
different number of jets have also been performed.
