A.V. Sidorenko - Dr.Sc. (Eng.), Professor, Department of Physics and Aerocosmic technologies, Belarusian State University (Minsk). E-mail: sidorenkoa@yandex.ru
M.V. Zhalkovsky - Post-graduate Student, Belarusian State University
Z.A. Makarova - Student, Belarusian State University
N.A. Soloduho - Magistrant, Belarusian State University