1. State Research Center of the Russian Federation Troitsk Institute for Innovation and Fusion Research, ul. Pushkovykh, vladenie 12, Troitsk, Moscow, 142190, Russia
2. A. A. Bochvar High Technology Research Institute of Inorganic Materials ul. Rogova, 5a, Moscow, 123098, Russia
3. Efremov Scientific Research Institute of Electrophysical Apparatus, Doroga na Metallostroy 3 bld., Metallostroy, Saint-Petersburg, 196641, Russia
4. Institution “Project Center ITER,” Akademika Kurchatova pl., 1, Moscow, 123182, Russia