Formation of a hot plasma filament during the focusing of imploding cylindrical corona

We present the results of the theoretical studies of the plasma heating in the flows which converge toward the axis of cylindrical cavity. We show tha t as a result of the shock wave reflection from the axis, the narrow hot fi lament is formed. This phenomenon is important for the interpretation of th e dynamic processes in the electric discharges used for X-ray generation. W e notice that the plasma parameters which can be of interest for inertial c onfinement fusion (ICF) can be reached in such the processes.