Plasma flow focusing on the symmetry axis for plasma a heating

Heat of a dense plasma at collision of plasma flows at symmetry axis falling in vacuum from the cylindrical surface (reversed cylindrical corona) is analyzed. It is shown theoretically that plasma fiber with temperature essentially higher than the temperature of the environment plasma is being formed at the axis. The effect may manifest itself in axial discharges used to generate short-wave X-ray emission. Attention is given to the possibility to apply this effect to heat plasma up to thermonuclear temperatures