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Information × Registration Number 0220U100344, 0119U101375 , R & D reports Title Damage and modification effects in prospective materials of nuclear and thermonuclear power engineering under the influence of powerful plasma loads. popup.stage_title Head Makhlai Vadym O., Кандидат фізико-математичних наук Registration Date 15-01-2020 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2   An experimental investigation of erosion processes on castellated tungsten surfaces has been performed within the powerful quasi-stationary plasma accelerator QSPA Kh-50 with conditions that simulated a failure of the edge localized mode (ELM) control in ITER. Intense overheating of the castellated edge, which interacted with the plasma first, was observed alongside the formation of an excrescence of shifted material during the first few tens of plasma pulses. The maximum number of ejected particles was registered after the plasma pulses, i.e. during the cooling process. Nevertheless, the amount of particles ejected during the plasma exposure increased with the plasma pulse number. The splashing of droplets and ejection of dust was suppressed on flat surfaces of castellated monoblocks, whereas the edges were identified as the main source of ejected particles. In this work, we have investigated the evolution of the hardness of tungsten under successive thermal shock pulses induced under plasma exposure at quasi-stationary plasma accelerator QSPA-Kh50. It is shown that multiple microcracks appear after the 50th cycle which correlates with the reduction of the hardness corresponding to the massive grain growth. Product Description popup.authors Yeliseev Dmytro V. Yeromin Valerii P. Aksenov Mykola Mykolayovych Alentiev Serhiy Fedorovych Basargin Valerii O. Byrka Oleh V. Boyko Oleksandr M. Vasilenko Ruslan L. Voycenia Volodymyr S. Volkova Yuliia Ye. Garkusha Igor Ye. Garkusha Natalia M. Herashchenko Stanislav S. Zhurkina Raisa I. Kalchenko Oleksandr Sergiyovych Kozhenkov Yurii Fedorovych Kulyk Mykola V. Ladygina Maryna S. Lebediev Sergiy I. Maznichenko Myhaylo Ye. Marchenko Hanna K. Makhlai Vadym O. Merenkova Tetiana M. Myronova Liudmyla M. Panasko Tamara O. Petrov Yuriy V. Seleznova Nataliia Ye. Skoryna Olena V. Solyakov Dmytro G. Staltsov Valerii V. Tkachenko Lidiya K. Trehub Svitlana V. Chebotarev Volodymyr V. Shevchuk Pavlo B. Yakovleva Vitaliya V. popup.nrat_date 2020-04-02 Close