E.O. Popov - Ph.D. (Phys.-Math.), Associate Professor, Senior Research Scientist, A.F. Ioffe Physical Technical Institute (Moscow). E-mail: e.popov@mail.ioffe.ru A.G. Kolosko - Associate Professor, Senior Research Scientist, A.F. Ioffe Physical Technical Institute (Moscow). E-mail: agkolosko@mail.ru S.V. Filippov - Post-graduate Student, A.F. Ioffe Physical Technical Institute (Moscow). E-mail: f_s_v@mail.ru, filippov@kafedrapik.ru P.A. Romanov - Post-graduate Student, A.F. Ioffe Physical Technical Institute (Moscow). E-mail: pashtinho@mail.ru I.L. Fedichkin - Engineer, A.F. Ioffe Physical Technical Institute (Moscow). E-mail: if@spectromass.ru