A.A. Ignatiev, M.N. Kulikov, A.A. Maslennikova, A.V. Prozorkevich

E.A. Kostyurina - Student at MIPT, Engineer at Kotel-nikov IREE of RAS (Moscow) E-mail: kostyurina@hitech.cplire.ru K.V. Kalashnikov - Ph.D. (Phys.-Math.), Research Scientist, Kotel-nikov IREE of RAS (Moscow) L.V. Filippenko - Ph.D. (Phys.-Math.), Senior Research Scientist, Kotel-nikov IREE of RAS (Moscow) V.P. Koshelets - Dr.Sc. (Phys.-Math.), Professor, Head of Laboratory, Kotel-nikov IREE of RAS (Moscow)