Thermal Desorption Spectroscopy of Deformed and Undeformed Tungsten after Exposure to a High-Intensity Plasma Flow

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Abstract

As a result of the exposure of tungsten to a high-intensity plasma flow, it is established that the exposure of recrystallized and plastically deformed samples leads to fundamentally different mechanisms of confinement of plasma particles and associated deformation of the surface. The surface of the exposed deformed samples contains micrometer-sized ruptured blisters: an indication of the formation of subsurface bubbles on a grid of dislocations forming during deformation. Desorption spectra of both types of sample are decomposed into three peaks, corresponding to the detachment of plasma–gas particles from dislocations, deuterium-vacancy clusters, and pores. Plastic deformation, which leads to an increase in the dislocation density, does not change the position of the three peaks in the desorption spectra but increases their amplitude in comparison with the recrystallized material.

Details

Original languageEnglish
Pages (from-to)163-169
Number of pages7
JournalJournal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
Volume12
Issue number1
DOIs
Publication statusPublished - 2 Apr 2018

Keywords

  • Thermal Desorption Spectroscopy, Tungsten, plasma, Dislocations, plasma confinement

ID: 4540695