Unraveling the plasma-material interface with real time diagnosis of dynamic boron conditioning in extreme tokamak plasmas
Autor: | Bruce E. Koel, Jean Paul Allain, C.H. Skinner, Robert Kaita, Stephan Irle, F. Bedoya, Predrag S Krstic, F. Javier Dominguez-Gutiérrez |
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Rok vydání: | 2017 |
Předmět: |
inorganic chemicals
Nuclear and High Energy Physics Materials science Tokamak technology industry and agriculture Analytical chemistry chemistry.chemical_element Plasma Condensed Matter Physics 01 natural sciences Oxygen 010305 fluids & plasmas law.invention chemistry Deuterium X-ray photoelectron spectroscopy law 0103 physical sciences lipids (amino acids peptides and proteins) Graphite Atomic physics 010306 general physics Boron Carbon |
Zdroj: | Nuclear Fusion. 57:086050 |
ISSN: | 1741-4326 0029-5515 |
DOI: | 10.1088/1741-4326/aa7b17 |
Popis: | We present a study of the role of boron and oxygen in the chemistry of deuterium retention in boronized ATJ graphite irradiated by the extreme environment of a tokamak deuterium plasma. The experimental results were obtained by the first XPS measurements inside the plasma chamber of the National Spherical Torus Experiment Upgrade, between the plasma exposures. The subtle interplay of boron, carbon, oxygen and deuterium chemistry is explained by reactive molecular dynamics simulations, verified by quantum–classical molecular dynamics and successfully compared to the measured data. The calculations deciphered the roles of oxygen and boron for the deuterium retention and predict deuterium uptake into a boronized carbon surface close in value to that previously predicted for a lithiated and oxidized carbon surface. |
Databáze: | OpenAIRE |
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