Spectroscopic study of plasma-facing graphite tiles modified by electron and proton irradiation

Jin Jung Kweon, Kyu Won Lee, Jun Kue Park, Gi Wan Jeon, Cheol Eui Lee, S. J. Noh, H. S. Kim

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Abstract

We have carried out Raman, electron spin resonance (ESR), and X-ray photoemission (XPS) spectroscopy measurements on the graphite tiles modified by electron and proton irradiation. While increase in local order was observed in the electron-irradiated sample, structural disorder and amorphization were revealed in the proton-irradiated sample, with much reduced electrical conductivity. Besides, a narrow ESR peak attributed to localized spins, closely associated with C-OH bonds as identified by the XPS measurements, was detected in the proton-irradiated sample.

Original languageEnglish
Pages (from-to)145-147
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume274
DOIs
Publication statusPublished - 2012 Mar 1

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Keywords

  • Carbon-based plasma-facing material
  • Electron irradiation
  • Graphite tile
  • Proton irradiation
  • Spectroscopy

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

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