O.S. Erkovich - Associate Professor, Bauman Moscow State Technical University. E-mail: fn@bmstu.ru P.A. Ivliev - Post-graduate Student, Bauman Moscow State Technical University. E-mail: ivliev-pavel@mail.ru

P.A. Ivliev - Post-graduate Student, Department of Physics, Bauman Moscow State Technical University E-mail: ivliev-pavel@mail.ru

F.I. Zhukov1, A.V. Kudryavtsev2

1,2 MIREA – Russian Technological University (Moscow, Russia)
1 zhukovfe@gmail.com, 2 kudryavcev_a@mirea.ru