Samuel Lukeš
(Institute of Plasma Physics of CAS, Prague, Czech Republic)
COMPASS Upgrade will be a new tokamak-type device in Prague that is used to maintain plasma reaching extreme temperatures of several keV using magnetic fields of several teslas. Tokamaks (and other devices) aim to enable the possibility of clean, globally available and almost inexhaustible nuclear fusion energy. However, there are many obstacles in the way. This work focuses on erosion of the reactor's tungsten heat shield under the flux of energetic plasma particles and subsequent contamination of plasma by the shield material.
Simulations were performed with the 3D Monte Carlo erosion & particle tracking code ERO2.0 assuming preliminary plasma background data from the fluid code SOLPS-ITER. Although the results show tungsten concentration values safely below 1e16 (the limit for fusion reactor operation), with a lack of reliable input data, the work further addresses the sensitivity to the input data and the possibilities for further tungsten concentration reduction. It is worth noting that even 1 mm of geometry adjustments can reduce the tungsten concentration by a factor of 2, which can be vital for a reactor.
Samuel Lukeš
(Institute of Plasma Physics of CAS, Prague, Czech Republic)
Christoph Baumann
(Institute of Fusion Energy and Nuclear Waste Management, FZJ, Wilhelm-Johnen-Straße, 52428 Jülich, Germany)
David Tskhakaya
(Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 2525/1a, 182 00 Prague 8, Czech Republic)
Fabien Jaulmes
(Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 2525/1a, 182 00 Prague 8, Czech Republic)
Henri Kumpulainen
(Institute of Fusion Energy and Nuclear Waste Management, FZJ, Wilhelm-Johnen-Straße, 52428 Jülich, Germany)
Irina Borodkina
(Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 2525/1a, 182 00 Prague 8, Czech Republic)
Jan Horacek
(Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 2525/1a, 182 00 Prague 8, Czech Republic)
Jiri Malinak
(Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 2525/1a, 182 00 Prague 8, Czech Republic)
Juri Romazanov
(Institute of Fusion Energy and Nuclear Waste Management, FZJ, Wilhelm-Johnen-Straße, 52428 Jülich, Germany)
Oleg Shyshkin
(Institute of Fusion Energy and Nuclear Waste Management, FZJ, Wilhelm-Johnen-Straße, 52428 Jülich, Germany)
Renaud Dejarnac
(Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 2525/1a, 182 00 Prague 8, Czech Republic)
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