Influence of Hydrogen Plasma on the Surface Structure of Beryllium
Skakov M. Batyrbekov E. Sokolov I. Miniyazov A. Tulenbergenov T. Sapataev Y. Orazgaliyev N. Bukina O. Zhanbolatova G. Kozhakhmetov Y.
September 2022MDPI
Materials
2022#15Issue 18
This paper presents the research results of hydrogen plasma effect on the surface structure of the TGP-56 beryllium. In the linear simulator, the operating conditions of the first wall of ITER are simulated. Beryllium was irradiated with hydrogen plasma at surface temperatures of ~360 °C, ~800 °C, and ~1200 °C, depending on its location in the ITER chamber; with a different number of pulses with a duration of each pulse of 500 s. Samples of irradiated beryllium were subjected to a set of material studies. Experimental data were obtained on the change in the structure of the surface and edges of the beryllium samples after the plasma effect. It was found that at normal (2 MW/m2) and increased (4.7 MW/m2) heat fluxes on the first wall of the ITER, the edges and beryllium surface have good resistance to erosion. Under critical conditions close to the melting point, beryllium strongly erodes and evaporates. It has been established that this material has a high resource resistance to hydrogen plasma effect in the ITER under operating conditions.
beryllium , erosion , hydrogen , ITER , plasma
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National Nuclear Center of the Republic of Kazakhstan, Kurchatov, 071100, Kazakhstan
Institute of Atomic Energy Branch of National Nuclear Center of the Republic of Kazakhstan, Kurchatov, 071100, Kazakhstan
The Department of Applied Physics and Heat Power Engineering, Shakarim University, Semey, 071412, Kazakhstan
National Nuclear Center of the Republic of Kazakhstan
Institute of Atomic Energy Branch of National Nuclear Center of the Republic of Kazakhstan
The Department of Applied Physics and Heat Power Engineering
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