A.N. Petrov – Post-graduate Student,
Peter The Great St. Petersburg Polytechnic University
E-mail: alexey-np@yandex.ru
V.V. Lebedev – Ph.D.(Phys.-Math.), Junior Research Scientist,
Ioffe Physical-Technical Institute (St Petersburg)
E-mail: vladimir_l@mail.ru
A.V. Shamray – Dr.Sc.(Phys.-Math.), Leading Research Scientist,
Peter The Great St. Petersburg Polytechnic University;
Main Research Scientist, Head of Department,
Ioffe Physical-Technical Institute (St Petersburg)
E-mail: achamrai@mail.ioffe.ru