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Adhesive force distributions for tungsten dust deposited on bulk tungsten and beryllium-coated tungsten surfaces
Comprehensive measurements of the adhesive force for tungsten dust adhered to tungsten surfaces have been performed with the electrostatic detachment method. Monodisperse spherical dust has been deposited with gas dynamics techniques or with gravity mimicking adhesion as it naturally occurs in tokamaks. The adhesive force is confirmed to follow the log-normal distribution and empirical correlations are proposed for the size-dependence of its mean and standard deviation. Systematic differences are observed between the two deposition methods and attributed to plastic deformation during sticking impacts. The presence of thin beryllium coatings on tungsten surfaces is demonstrated to barely affect adhesion.
Adhesive force distributions for tungsten dust deposited on bulk tungsten and beryllium-coated tungsten surfaces
Comprehensive measurements of the adhesive force for tungsten dust adhered to tungsten surfaces have been performed with the electrostatic detachment method. Monodisperse spherical dust has been deposited with gas dynamics techniques or with gravity mimicking adhesion as it naturally occurs in tokamaks. The adhesive force is confirmed to follow the log-normal distribution and empirical correlations are proposed for the size-dependence of its mean and standard deviation. Systematic differences are observed between the two deposition methods and attributed to plastic deformation during sticking impacts. The presence of thin beryllium coatings on tungsten surfaces is demonstrated to barely affect adhesion.
Adhesive force distributions for tungsten dust deposited on bulk tungsten and beryllium-coated tungsten surfaces
P. Tolias (author) / G. Riva (author) / M. De Angeli (author) / S. Ratynskaia (author) / G. Daminelli (author) / C.P. Lungu (author) / C. Porosnicu (author)
2018
Article (Journal)
Electronic Resource
Unknown
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