Abstract
In this paper, experiments were conducted on the thermal effect of an electron beam on beryllium of the TGP-56 grade in vacuum, at the values of the surface temperature of beryllium ∼360, ∼800 and ∼1200 °C with the number of pulses 10 and 100 with the same pulse duration – 500 s. A complex of material research such as microanalysis, x-ray diffraction analysis, determination of microhardness was conducted. The experimental data on changes in mechanical properties and melting conditions of beryllium at the boundary between gaps of the plates of the ITER first wall as a result of heat loads were obtained. It was found that in the normal operation mode of ITER (2.0–4.7 MW) the edges of beryllium have good resistance to spraying. Under critical conditions, closer to the melting point, beryllium is strongly sprayed.
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