Ion irradiated graphite exposed to fusion-relevant deuterium plasma

Alec Deslandes; Mathew C Guenette; Cormac Corr; I Karatchevtseva; Lars Thomsen; Mihail Ionescu; Gregory R. Lumpkin; Daniel Riley

doi:10.1016/j.nimb.2014.06.027

Ion irradiated graphite exposed to fusion-relevant deuterium plasma

Alec Deslandes, Mathew C Guenette, Cormac Corr, I Karatchevtseva, Lars Thomsen, Mihail Ionescu, Gregory R. Lumpkin, Daniel Riley

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

Abstract

Graphite samples were irradiated with 5 MeV carbon ions to simulate the damage caused by collision cascades from neutron irradiation in a fusion environment. The ion irradiated graphite samples were then exposed to a deuterium plasma in the linear plasma device, MAGPIE, for a total ion fluence of âˆ¼1 Ã— 1024 ions m-2. Raman and near edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to characterize modifications to the graphitic structure. Ion irradiation was observed to decrease the graphitic content and induce disorder in the graphite. Subsequent plasma exposure decreased the graphitic content further. Structural and surface chemistry changes were observed to be greatest for the sample irradiated with the greatest fluence of MeV ions. D retention was measured using elastic recoil detection analysis and showed that ion irradiation increased the amount of retained deuterium in graphite by a factor of four.

Original language	English
Pages (from-to)	21-26
Journal	Nuclear Instruments and Methods in Physics Research: Section B
Volume	340
DOIs	https://doi.org/10.1016/j.nimb.2014.06.027
Publication status	Published - 2014

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title = "Ion irradiated graphite exposed to fusion-relevant deuterium plasma",

abstract = "Graphite samples were irradiated with 5 MeV carbon ions to simulate the damage caused by collision cascades from neutron irradiation in a fusion environment. The ion irradiated graphite samples were then exposed to a deuterium plasma in the linear plasma device, MAGPIE, for a total ion fluence of {\^a}ˆ¼1 {\~A}— 1024 ions m-2. Raman and near edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to characterize modifications to the graphitic structure. Ion irradiation was observed to decrease the graphitic content and induce disorder in the graphite. Subsequent plasma exposure decreased the graphitic content further. Structural and surface chemistry changes were observed to be greatest for the sample irradiated with the greatest fluence of MeV ions. D retention was measured using elastic recoil detection analysis and showed that ion irradiation increased the amount of retained deuterium in graphite by a factor of four.",

author = "Alec Deslandes and Guenette, {Mathew C} and Cormac Corr and I Karatchevtseva and Lars Thomsen and Mihail Ionescu and Lumpkin, {Gregory R.} and Daniel Riley",

year = "2014",

doi = "10.1016/j.nimb.2014.06.027",

language = "English",

volume = "340",

pages = "21--26",

journal = "Nuclear Instruments and Methods in Physics Research: Section B",

publisher = "Elsevier",

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TY - JOUR

T1 - Ion irradiated graphite exposed to fusion-relevant deuterium plasma

AU - Deslandes, Alec

AU - Guenette, Mathew C

AU - Corr, Cormac

AU - Karatchevtseva, I

AU - Thomsen, Lars

AU - Ionescu, Mihail

AU - Lumpkin, Gregory R.

AU - Riley, Daniel

PY - 2014

Y1 - 2014

N2 - Graphite samples were irradiated with 5 MeV carbon ions to simulate the damage caused by collision cascades from neutron irradiation in a fusion environment. The ion irradiated graphite samples were then exposed to a deuterium plasma in the linear plasma device, MAGPIE, for a total ion fluence of âˆ¼1 Ã— 1024 ions m-2. Raman and near edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to characterize modifications to the graphitic structure. Ion irradiation was observed to decrease the graphitic content and induce disorder in the graphite. Subsequent plasma exposure decreased the graphitic content further. Structural and surface chemistry changes were observed to be greatest for the sample irradiated with the greatest fluence of MeV ions. D retention was measured using elastic recoil detection analysis and showed that ion irradiation increased the amount of retained deuterium in graphite by a factor of four.

AB - Graphite samples were irradiated with 5 MeV carbon ions to simulate the damage caused by collision cascades from neutron irradiation in a fusion environment. The ion irradiated graphite samples were then exposed to a deuterium plasma in the linear plasma device, MAGPIE, for a total ion fluence of âˆ¼1 Ã— 1024 ions m-2. Raman and near edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to characterize modifications to the graphitic structure. Ion irradiation was observed to decrease the graphitic content and induce disorder in the graphite. Subsequent plasma exposure decreased the graphitic content further. Structural and surface chemistry changes were observed to be greatest for the sample irradiated with the greatest fluence of MeV ions. D retention was measured using elastic recoil detection analysis and showed that ion irradiation increased the amount of retained deuterium in graphite by a factor of four.

U2 - 10.1016/j.nimb.2014.06.027

DO - 10.1016/j.nimb.2014.06.027

M3 - Article

VL - 340

SP - 21

EP - 26

JO - Nuclear Instruments and Methods in Physics Research: Section B

JF - Nuclear Instruments and Methods in Physics Research: Section B

ER -

Ion irradiated graphite exposed to fusion-relevant deuterium plasma

Abstract

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