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