I. A. Vdovichenko  Ph.D. (Phys.-Math.), Associate Professor,

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

E-mail: physics@nntu.ru

G. S. Malyshev  Post-graduate Student,

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

E-mail: gr1g0r@yandex.ru

N. A. Novoselova  Ph.D. (Eng.), Associate Professor,

Nizhny Novgorod State Technical University n.a. R.E. Alekseev

G. I. Shishkov  Ph.D. (Eng.), Professor,

Nizhny Novgorod State Technical University n.a. R.E. Alekseev