P.N. Zakharov - Ph. D. (Phys.-Math.), Associate Professor, Faculty of Physics, Lomonosov Moscow State University. E-mail: zakharov1@mail.ru A.F. Korolev - Ph. D. (Phys.-Math.), Associate Professor, Faculty of Physics, Lomonosov Moscow State University. E-mail: korolev_phys@mail.ru A.A. Potapov - Dr. Sc. (Eng.), Ph. D. (Phys.-Math.), Leading Research Scientist, Faculty of Physics, Lomonosov Moscow State University. E-mail: al_ptv@mail.ru A.V. Turchaninov - Senior Research Scientist, Faculty of Physics, Lomonosov Moscow State University. E-mail: aturmail54@mail.ru

A.A. Potapov1

1  Lomonosov Moscow State University (Moscow, Russia)