Space-time structure of the magnetic field of a laser plasma and methods for its enhancement outside the plasma

A considerable enhancement (more than three orders of magnitude) of the magnetic field outside a laser plasma under a large-scale nonuniformity of the experimental configuration has been observed. Some fundamental peculiarities, which indicate the active role of the target in magnetic field generation, have been established. For example, the target topology, the ratio of its dimensions, the conductivity in contact with a plasma ''ionization aureole'' were found to be important factors, that can determine the structure of magnetic field of the laser plasma.