I.V. Govorun - Ph.D. (Eng.), Research Scientist, Krasnoyarsk Scientific Center of the Siberian Branch of the RAS (Krasnoyarsk) E-mail: govorun-ilya@mail.ru A.A. Leksikov - Dr.Sc. (Eng.), Leading Research Scientist, Kirensky Institute of Physics of the Siberian Branch of the RAS (Krasnoyarsk)