D.V. Kondakov – Leading Engineer,
Peter The Great St. Petersburg Polytechnic University
E-mail: dmitrii.kondakov@spbstu.ru
A.P. Lavrov – Dr.Sc.(Phys.-Math.), Senior Research Scientist, Professor,
Higher School of Applied Physics and Space Technologies, Peter The Great St. Petersburg Polytechnic University E-mail: lavrov@ice.spbstu.ru