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- ПубликацияТолько метаданныеObservation of the Shape Isomer States in Fission Fragments from (γ, f) Reactions(2023) Kamanin, D. V.; Pyatkov, Y. V.; Solodov, A. N.; Strekalovsky, A. O.; Пятков, Юрий Васильевич
- ПубликацияОткрытый доступAzimuthal Scanning of the Atmosphere in the Muon Flux(2023) Timakov, S. S.; Petrukhin, A. A.; Тимаков, Станислав Сергеевич; Петрухин, Анатолий Афанасьевич
- ПубликацияОткрытый доступMaterial transport from marker tiles in the JET divertor(2023) Likonen, J.; Coad, J. P.; Alves, E.; Catarino, N.; Krat, S.; Крат, Степан АндреевичFor each of the three JET ILW campaigns a few special marker tiles were placed in the divertor. Amongst the W-coated CFC tiles are tiles coated with a в€ј3 Вµm layer of Mo with a в€ј4 Вµm topcoat of W and tiles with just a в€ј4 Вµm layer of Mo to measure erosion and re-deposition. During ILW1 just one Mo marker tile was included in the inner divertor band of Tiles 3. After ILW1 the Mo marker was removed for analysis and inter alia two W-coated Tiles 4 to check for re-deposited Mo. About 7% of the Mo removed from the Tile 3 Mo marker was found on band 4 tiles. A fresh Mo marker Tile 3 was inserted in for ILW2+3 plus a Mo marker Tile 4 for ILW2 (after which it was removed for analysis). Tile 4 removed after ILW3 was measured for Mo re-deposition. The Mo deposition pattern on Tile 4 with a regular W topcoat was quite different to that after ILW1, with much more Mo located towards the corner of the divertor.
- ПубликацияТолько метаданныеMEPhIST-0 integrated control and data acquisition system(2023) Efimov, N.; Podolyako, F.; Prishvitsyn, A.; Krat, S.; Ефимов, Никита Евгеньевич; Подоляко, Федор Сергеевич; Пришвицын, Александр Сергеевич; Крат, Степан Андреевич
- ПубликацияОткрытый доступEffects of helium (He) bubbles and annealing on the structural evolution and migration behavior of silver (Ag) implanted into polycrystalline SiC at 350 °C(2023) Mtsi, S. Z.; Sohatsky, A.; Abdalla, Z.A.Y.; Njoroge, E. G.; Skuratov, V. A.; Скуратов, Владимир АлексеевичThe effects of helium (He) bubbles and annealing on the structural evolution and the migration of silver (Ag) implanted into polycrystalline silicon carbide were investigated. Ag ions of 360 keV were implanted into polycrystalline SiC to a fluence of 2 Г— 10 16 cmв€’2 at 350 В°C (Ag-SiC). Some of the implanted samples were then implanted with He ions of 17 keV to a fluence of 1 Г— 1017 cmв€’2 also at 350 В°C (Ag + He-SiC). The Ag-SiC and Ag + He-SiC samples were then annealed at 1100 В°C for 5 h. The as-implanted and annealed samples were characterized by Raman spectroscopy, scanning electron microscopy (SEM) and atomic force microscopy (AFM), Rutherford backscattering spectrometry (RBS) and transmission electron microscopy (TEM). Implantation of Ag resulted in the accumulation of defects in SiC without amorphization. Co-implantation of He resulted in the formation of elongated and tiny He bubbles accompanied by the formation of blisters and holes on the surface. Annealing at 1100 В°C resulted in some recovery of the SiC crystal structure, indicating that some defects were annealed out in both Ag-SiC and Ag + He-SiC. This was accompanied by the appearance of more holes on the annealed Ag + He-SiC surface and bigger cavities in the co-implanted SiC layer. Some limited migration of implanted Ag accompanied by the formation of Ag precipitates was observed in the as-implanted Ag + He-SiC sample. No migration of Ag was observed in the annealed Ag-SiC samples while migration of Ag towards the surface accompanied by loss was observed in the annealed Ag + He-SiC sample. The migration of Ag in the annealed Ag + He-SiC was also accompanied by the formation of big Ag precipitates trapped in the cavities. Hence, He bubbles assisted the migration of Ag while cavities trapped the Ag in the Ag + He-SiC samples.