A.S. Smygacheva - Post-graduate Student, National Research Center «Kurchatov Institute». E-mail: sasmyga@mail.ru V.N. Korchuganov - Dr.Sc. (Phys.-Math.), National Research Center «Kurchatov Institute». E-mail: vnkorchuganov@mail.ru

D.D. Kulminskiy - Junior Research Scientist, Saratov branch of Kotelnikov IRE RAS. E-mail: kulminskydd@gmail.com A.S. Karavaev - Ph.D. (Phys.-Math.), Associate Professor, Saratov National Research State University named N.G. Chernyshevsky V.I. Ponomarenko - Dr.Sc. (Phys. Math.), Leading Research Scientist, Saratov branch of Kotelnikov IRE RAS M.D. Prokhorov - Dr.Sc. (Phys. Math.), Head of Laboratory, Saratov branch of Kotelnikov IRE RAS