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Deuterium retention and near-surface modification of ion-irradiated diamond exposed to fusion-relevant plasma

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

Description

Chemical vapour deposited diamond was irradiated with 5 MeV carbon ions to simulate the damage caused by collision cascades from neutron irradiation in a fusion environment. Ion-irradiated samples were then exposed to a deuterium plasma in MAGPIE with ion flux of ∼1.3 × 1021 ions m -2 s-1. Raman and near edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to characterize the degree of disorder and sp2-bonding induced by the ion irradiation. The signals of sp2-bonded and...[Show more]

dc.contributor.authorDeslandes, Alec
dc.contributor.authorGuenette, Mathew C
dc.contributor.authorCorr, Cormac
dc.contributor.authorKaratchevtseva, I
dc.contributor.authorThomsen, Lars
dc.contributor.authorLumpkin, Gregory R.
dc.contributor.authorRiley, Daniel
dc.date.accessioned2015-12-08T22:33:50Z
dc.identifier.issn0029-5515
dc.identifier.urihttp://hdl.handle.net/1885/34829
dc.description.abstractChemical vapour deposited diamond was irradiated with 5 MeV carbon ions to simulate the damage caused by collision cascades from neutron irradiation in a fusion environment. Ion-irradiated samples were then exposed to a deuterium plasma in MAGPIE with ion flux of ∼1.3 × 1021 ions m -2 s-1. Raman and near edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to characterize the degree of disorder and sp2-bonding induced by the ion irradiation. The signals of sp2-bonded and disordered carbon were observed to decrease after exposure to the deuterium plasma, although sharp Raman peaks indicative of vacancy and interstitial defects induced by the MeV ions were less affected. Recovery of a diamond-like surface after plasma exposure was evident in the NEXAFS spectra. Elastic recoil detection analysis showed that the ion-damaged diamond retained more deuterium than diamond exposed only to deuterium plasma. For the case of unirradiated samples, diamond retained more deuterium than graphite. However, for the case of the ion-irradiated samples, diamond exhibited less deuterium retention than graphite.
dc.publisherIOP Publishing
dc.sourceNuclear Fusion
dc.titleDeuterium retention and near-surface modification of ion-irradiated diamond exposed to fusion-relevant plasma
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume54
dc.date.issued2014
local.identifier.absfor020204 - Plasma Physics; Fusion Plasmas; Electrical Discharges
local.identifier.ariespublicationu4860843xPUB117
local.type.statusPublished Version
local.contributor.affiliationDeslandes, Alec, ANSTO
local.contributor.affiliationGuenette, Mathew C, ANSTO
local.contributor.affiliationCorr, Cormac, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKaratchevtseva, I, ANSTO
local.contributor.affiliationThomsen, Lars, Australian Synchrotron
local.contributor.affiliationLumpkin, Gregory R., ANSTO
local.contributor.affiliationRiley, Daniel, Australian Nuclear Science and Technology Organisation
local.description.embargo2037-12-31
local.bibliographicCitation.issue7
local.bibliographicCitation.startpage9
local.identifier.doi10.1088/0029-5515/54/7/073003
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2015-12-08T09:38:44Z
local.identifier.scopusID2-s2.0-84899442158
local.identifier.thomsonID000338344200009
CollectionsANU Research Publications

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