Yu.E. Korchagin1, K.D. Titov2, O.N. Titova3

1-3 Voronezh State University (Voronezh, Russia)

2 MESC of the Air Force Academy named after Professor N.E. Zhukovsky and Yu.A. Gagarin (Voronezh, Russia)

1 korchagin@phys.vsu.ru; 2 titovkd@gmail.com; 3 onzavalishina@mail.ru