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1.	Bergsåker, Henric, et al. (author) Studies of mobile dust in scrape-off layer plasmas using silica aerogel collectors 2011 In: Journal of Nuclear Materials. - : Elsevier BV. - 0022-3115 .- 1873-4820. ; 415:1, s. S1089-S1093 Journal article (peer-reviewed)abstract Dust capture with ultralow density silica aerogel collectors is a new method, which allows time resolved in situ capture of dust particles in the scrape-off layers of fusion devices, without substantially damaging the particles. Particle composition and morphology, particle flux densities and particle velocity distributions can be determined through appropriate analysis of the aerogel surfaces after exposure. The method has been applied in comparative studies of intrinsic dust in the TEXTOR tokamak and in the Extrap T2R reversed field pinch. The analysis methods have been mainly optical microscopy and SEM. The method is shown to be applicable in both devices and the results are tentatively compared between the two plasma devices, which are very different in terms of edge plasma conditions, time scale, geometry and wall materials.
2.	Sahle, Wubeshet (author) Electron microscopy studies of tungsten oxides in the range WO₃ - WO₂˔₇₂ : phase relations, defect structures, structural transformations and electrical conductivity 1983 Doctoral thesis (other academic/artistic)abstract The article reviews recent studies of structural variations in the W-O system in the composition range of WO3-WO2.72. Several types of defect structures have been observed in high resolution electron microscopy studies and defect models have been proposed. The structural transformations in the solid state have also been investigated and mechanisms for the processes occurring upon reduction and oxidation have been suggested. The electrical conductivities of structurally well characterized crystals have been measured.

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Type of publication: journal article (1); doctoral thesis (1)

Type of content: other academic/artistic (1); peer-reviewed (1)

Author/Editor: Sahle, Wubeshet (2); Bergsåker, Henric (1); Ratynskaia, Svetlana (1); Litnovsky, A. (1); Ogata, Douglas (1)

University: Royal Institute of Technology (1); Stockholm University (1)

Language: English (2)

Research subject (UKÄ/SCB): Natural sciences (2)

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