1. V.N.Karazin Kharkiv National University, Svobody sq. 4, 61022 Kharkiv, Ukraine
2. National Fusion Research Institute, Plasma Technology Research Center, 37 Dongjangsan-ro, Gunsan-si, Jeollabuk-do, 54004 Gunsan, South Korea
3. Karlsruhe Institute of Technology, IHM and IHE, 76131 Karlsruhe, Germany