A.B. Odobesco - Research Scientist, V.A. Kotel-nikov Institute of Radio Engineering and Electronics of RAS (Moscow) E-mail: arty@cplire.ru I.B. Boborov - Research Scientist,, Physical Department, Lomonosov Moscow State University I.A. Burenkov - Research Scientist, Physical Department, Lomonosov Moscow State University E.A. Ruben - Research Scientist, Physical Department, Lomonosov Moscow State University S.S. Straupe - Senior Research Scientist, Physical Department, Lomonosov Moscow State University S.P. Kulik - Research Scientist, Head of Laboratory, Physical Department, Lomonosov Moscow State University