Studies at Test-Bench with Plasma-Beam Installation

To this date, extensive evidences are available for hydrogen isotopes’ interaction with tungsten. However a number of aspects still remain insufficiently studied or unsearched.

With spraying, migration and reprecipitation of materials, occurrence of various films on its surface increase. Impact of foreign coating to hydrogen-material interaction remains fragmentarily studied. Moreover, formation of carbon films and availability of carbide phase compounds significantly influence all recycling processes: fuel component capture, their accumulation, retention and back gas release.

Laboratory of material testing, National Nuclear Center RK, carries out an investigation into effect of carbon films and carbide phase compounds to hydrogen isotope permeability through tungsten under ion irradiation in fusion reactor.

The experiments are carried out at simulation test-bench with plasma-beam installation. Elaboration of a collector unit at the test-bench is an important mission. The function of the collector unit is a leak-tight separation of two chambers by the studied sample of membrane made of tungsten foil. The idea of the collector unit was to align deuterium saturation chamber and high-vacuum chamber through the membrane for mass-spectrometry analysis.