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

doi:10.1016/j.nimb.2011.12.014

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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 language	English
Pages (from-to)	145-147
Number of pages	3
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	274
DOIs	https://doi.org/10.1016/j.nimb.2011.12.014
Publication status	Published - 2012 Mar 1

Keywords

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

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nimb.2011.12.014

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Spectroscopic study of plasma-facing graphite tiles modified by electron and proton irradiation. / Kweon, Jin Jung; Lee, Kyu Won; Park, Jun Kue; Jeon, Gi Wan; Lee, Cheol Eui; Noh, S. J.; Kim, H. S.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 274, 01.03.2012, p. 145-147.

Research output: Contribution to journal › Article › peer-review

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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.",

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AU - Kweon, Jin Jung

AU - Lee, Kyu Won

AU - Park, Jun Kue

AU - Jeon, Gi Wan

AU - Lee, Cheol Eui

AU - Noh, S. J.

AU - Kim, H. S.

PY - 2012/3/1

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N2 - 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.

AB - 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.

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KW - Proton irradiation

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