V.I. Parfenov1, A.A. Kalininsky2, Kaung Myat San3, A.V. Terekhov4

1,2 Voronezh State University (Voronezh, Russia)

3,4 National Research University “MPEI” (Moscow, Russia)

1 vip@phys.vsu.ru, 2 kalininskii-a-98@mail.ru, 3 KaunMyat@mpei.ru, 4 aleksandr-terekhov@ya.ru