Influence of irradiation with low-energy helium ions on graphite and tungsten for fusion applications

H. S. Kim, S. J. Noh, J. J. Kweon, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Plasma-facing components (PFCs) in fusion devices are exposed to an irradiation environment of high particle flux. Among various candidate materials for PFCs, graphite is used as a first-wall material of the Korea Superconducting Tokamak Advanced Research (KSTAR) and tungsten is being strongly considered as a divertor material of the international thermonuclear experimental reactor (ITER). In this experiment, graphite and tungsten targets were irradiated by using low-energy helium ions, and the irradiation's influence on each target was studied with particular emphasis on the surface change. Changes in the surface morphology were observed by using scanning electron microscopy (SEM); induced disorders in the structure were investigated by using X-ray diffraction (XRD), Raman spectroscopy, and electron spin resonance (ESR) measurements.

Original languageEnglish
Pages (from-to)1422-1426
Number of pages5
JournalJournal of the Korean Physical Society
Volume63
Issue number7
DOIs
Publication statusPublished - 2013 Oct

Keywords

  • Graphite
  • Helium ion
  • Plasma-facing material
  • Tungsten

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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