1. Institute of Plasma Physics of NSC KIPT, 61108 Kharkov, Ukraine
2. V.N. Karazin Kharkiv National University, 61022 Kharkov, Ukraine
3. National Technical University “Kharkov Polytechnic Institute”, 61002 Kharkov, Ukraine
4. Kharkov Medical Academy of Post-Graduate Education, 61022 Kharkov, Ukraine