Helium and Deuterium Retention in Plastically Deformed Tungsten under High-Flux Plasma Irradiation

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  • PbPU - Peter the Great St.Petersburg Polytechnic University

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Abstract

The retention of helium and deuterium in tungsten irradiated with a high-intensity plasma flux (~1024 m−2 s−1) using either helium or deuterium ions is studied. Irradiation is carried out at a temperature of 480 K. Recrystallized and plastically deformed samples are used to detect the effect of the initial microstructure on plasma confinement and release. Thermal-desorption spectroscopy is performed to reveal the stages of release and for quantitative determination of the retention integral for both types of samples. A comparison of the recrystallized and plastically deformed samples is performed to determine the effect of plastic deformation (expressed in a high dislocation density and dislocation networks) on the confinement and release of plasma components. It is demonstrated that plastic deformation causes a significant decrease in helium retention, and, conversely, an increase in the capture of deuterium.

Details

Original languageEnglish
Pages (from-to)1254–1259
Number of pages6
JournalJournal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
Volume14
Issue number6
DOIs
Publication statusPublished - 28 Dec 2020

Keywords

  • dislocations, plasma confinement, tungsten, hydrogen, helium, thermal-desorption spectroscopy

ID: 7009519