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Tungsten nano-fuzz surface degradation under ion beam

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dc.contributor.authorSinelnikov, D.
dc.contributor.authorKurnaev, V.
dc.contributor.authorKolodko, D.
dc.contributor.authorSolovev, N.
dc.contributor.authorКолодко, Добрыня Вячеславич
dc.contributor.authorСинельников, Дмитрий Николаевич
dc.date.accessioned2024-11-28T08:21:57Z
dc.date.available2024-11-28T08:21:57Z
dc.date.issued2015
dc.description.abstractTungsten is the main candidate for plasma facing material in the divertor zone of a thermonuclear reactor due to high melting temperature, high thermal conductivity and low sputtering erosion yield. However, its surface can be modified by "fuzz" nanostructure, which can form in linear simulators and tokamaks [1] under helium irradiation fluence as high as ~1025m-2and sample temperature in the range of 1000-2000 K. Such structure significantly changes the plasma-wall interaction balance, which results in higher probability of unipolar arc ignition. In the case of arcing, erosion yield sharply increases, especially if arcing takes place on a fuzzy surface [2]. Tungsten fuzz is also characterized by high pre-breakdown current intensity, which could indicate the initial stage of unipolar arc ignition [3]. Prebreakdown currents are usually initiated by field emission due to amplification of electric field on sharp cathode relief. So, an investigation of emission properties dependence on surface relief during fuzz formation and destruction seems to be important for the prediction of unipolar arcing.
dc.identifier.citationTungsten nano-fuzz surface degradation under ion beam [Text.]/ Sinelnikov D. [и др.] // Взаимодействие ионов с поверхностью «ВИП – 2015»: труды XXII Международной конференции Том 2. - 2015. - С. 82-85
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/23329
dc.publisherНИЯУ МИФИ
dc.subjectКонференции НИЯУ МИФИ
dc.titleTungsten nano-fuzz surface degradation under ion beam
dc.typeArticle
dspace.entity.typePublication
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2015_Взаимодействие ионов с поверхностью (ВИП)