The mechanism of creation of hollow macroscopic periodic channel formed on a surface and in a volume of a MDS-structure during experiments with a high-current vacuum-tube diode at collapse conditions in anode is studied. It is shown that the reason for the appearance of such a trajectory can be the interaction of a magnetically charged particle with paramagnetic and diamagnetic surface layers of the MDS-structure. Particles with magnetic charge can be formed during the shock action of a high- current electron beam and the subsequent self-compression of the frozen magnetic field of the beam. It is shown that the great specific energy release, dQ tot /dl!"10 6 GeV/cm , spent on the formation of this channel can be due to the processes of nuclear synthesis which are occuring with participation of MDS-structure surface nuclei stimulated by magnetically charged particles. It is shown that these particles have small mass (much less then 10-22 gram) and are, most likely, light magnetic monopoles as proposed