High-heat flux tests of fusion materials with stationary plasma in the PLM device

Budaev, V.P.; Fedorovich, S. D.; Дедов, А. В.; Martynenko, Yuri; Frick, Peter; Karpov, A. V.; Oost, G. Van; Lyublinsky, I. E.; Vertkov, А.V.; Lukashevsky, M. V.; Gubkin, M. K.; Marchenkov, A. Yu.; Sviridov, E. V.; Grashin, S.A.; Лубенченко, А. В.; Lazukin, A. V.; Слива, А. П.; Rogozin, K. A.; Zakletsky, Z A

doi:10.1016/j.fusengdes.2020.111694

Cited by 11 publications

(11 citation statements)

References 23 publications

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“…Figures 1 and 2. The structures demonstrate a hierarchical granularity over scales of~0.5-500 microns [20,21]. This granularity is similar to the structure of hydrocarbon deposits such as cauliflower-like previously observed in tokamaks and plasma devices [3,5] under specific high-temperature plasma [26] impact.…”

Section: Experimental Samplessupporting

confidence: 78%

“…Chemical reactions of lithium with impurities in the plasma and on the surface of the vessel led to mixing of materials and a plasma-induced structure. In previous study [21], the post-mortem high-resolution scanning electron microscopy analysis of lithium deposits from the T-10 tokamak and subsequently irradiated with steady-state plasma in PLM device revealed that the surface of all examined samples are strictly irregular with porous and roughen irregular surface, the hierarchical granularity of the structure in the range of scales 0.5-500 μm was observed [20,21]. The hierarchical structure of deposits within scales from hundreds of nanometers to tens of micrometers of the samples treated in PLM was drastically changed [21].…”

Section: Discussionmentioning

confidence: 90%

“…The experimental conditions and samples from the T-10 tokamak and PLM plasma device are described in [20,21]. The deposited specimens as thick layers of~0.5-2 mm thickness of irregular shape are collected on in-vessel components of the T-10 tokamak.…”

Section: Experimental Samplesmentioning

confidence: 99%

“…Porous and roughen irregular surface of lithium deposits were detected by the post-mortem scanning electron microscopy (SEM) (see details in [20,21]) supposing the interaction of lithium with carbon and oxygen impurities in the plasma and on the vessel surface.…”

Section: Experimental Samplesmentioning

confidence: 99%

“…Lithium specimens from the T-10 tokamak were subsequently irradiated with plasma in PLM linear plasma device [24,25]. The samples were irradiated with helium plasma of discharge duration up to 200 min with plasma parameters identical to edge plasma in a tokamak (see details of these experiments in [20,21]).…”

Section: Experimental Samplesmentioning

confidence: 99%

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Spectroscopic characterization of composite lithium materials irradiated with high-temperature plasma

Budaev

Fedorovich

Лубенченко

et al. 2020

Heliyon

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High-temperature plasma irradiation of materials leads to significant modification of surface structure, growth of deposited composite films and surface layers with induced self-similar granularity on the scale from macroscales to nanoscale due to strong plasma-surface interaction. The aim of this study was to characterize lithium materials irradiated with high-temperature plasma in the T-10 tokamak and PLM device. The reactivity of lithium leads to reactions with impurities in the plasma and on the vessel. Post-mortem analyses by the X-ray photoemission spectroscopy and X-ray analysis have been used to identify deposits composition and morphology. Lithium carbonate composites have been detected by analysis demonstrating materials mixing and evidence of plasmainduced structure. New structures with the high specific surface area of hierarchical granular are registered. The reference industrial powder of lithium carbonate irradiated with steady-state plasma in the PLM device has acquired a new similar structure demonstrating universal influence of plasma on the structure of irradiated materials.

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