Investigation of the Evolution of Be, Ni, Mo, and W Dust Grains in Fusion Plasma
Bastykova N.K. Golyatina R.I. Kodanova S.K. Ramazanov T.S. Maiorov S.A.
January 2021Pleiades journals
Plasma Physics Reports
2021#47Issue 192 - 95 pp.
Abstract: In this work, evolution of dust grains from different materials used in fusion energy installations was studied and a model was constructed that describes the generation of dust. The model accounts for the thermochemical, electrical, and other properties of the materials of the fusion reactor wall. It was shown that the dominant process that leads to the decrease in dust grain mass is the thermal evaporation, which is determined by the saturated vapor pressure at thermal equilibrium temperature. Estimates of the lifetime of dust grains from different materials were obtained depending on plasma parameters. The findings of this work can be useful for estimates of the length of penetration of dust grains into the reactor. The difference in the dynamics of particles from light and heavy elements was shown. Out of the four elements under study (Be, Ni, Mo, and W), nickel grains demonstrate the highest penetrating ability due to their long lifetime and moderate weight.
dust grain , dust lifetime , edge plasma , fusion reactor
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Institute of Experimental and Theoretical Physics, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, 119991, Russian Federation
Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412, Russian Federation
Institute of Experimental and Theoretical Physics
Prokhorov General Physics Institute of the Russian Academy of Sciences
Joint Institute for High Temperatures
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