I.P. Kamalova - Student, Moscow Institute of Physics and Technology (State University), Engineer, PJSC «Radiofizika» (Moscow). E-mail: iren.kamalova@gmail.com M.V. Eisymont - Ph. D. (Eng.), Deputy Head of Department, PJSC «Radiofizika» (Moscow), Associate Professor, Moscow Institute of Physics and Technology (State University). E-mail: asymont@mail.ru