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

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dc.contributor.authorDeslandes, Aen_AU
dc.contributor.authorGuenette, MCen_AU
dc.contributor.authorCorr, CSen_AU
dc.contributor.authorKaratchevtseva, Ien_AU
dc.contributor.authorThomsen, Len_AU
dc.contributor.authorLumpkin, GRen_AU
dc.contributor.authorRiley, DPen_AU
dc.date.accessioned2016-07-05T23:57:03Zen_AU
dc.date.available2016-07-05T23:57:03Zen_AU
dc.date.issued2014-04-01en_AU
dc.date.statistics2016-07-06en_AU
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. © 2014, IAEA Vienna.en_AU
dc.identifier.articlenumber73003en_AU
dc.identifier.citationDeslandes, A., Guenette, M. C., Corr, C. S., Karatchevtseva, I., Thomsen, L., Lumpkin, G. R., & Riley, D. P. (2014). Deuterium retention and near-surface modification of ion-irradiated diamond exposed to fusion-relevant plasma. Nuclear Fusion, 54(7), 073003. doi:10.1088/0029-5515/54/7/073003en_AU
dc.identifier.govdoc6798en_AU
dc.identifier.issn0029-5515en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitleNuclear Fusionen_AU
dc.identifier.urihttp://dx.doi.org/10.1088/0029-5515/54/7/073003en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/7145en_AU
dc.identifier.volume54en_AU
dc.language.isoenen_AU
dc.publisherIOP Scienceen_AU
dc.subjectChemical vapor depositionen_AU
dc.subjectCarbon ionsen_AU
dc.subjectPlasmaen_AU
dc.subjectDeuteriumen_AU
dc.subjectRaman spectroscopyen_AU
dc.subjectElasticityen_AU
dc.subjectFine structureen_AU
dc.titleDeuterium retention and near-surface modification of ion-irradiated diamond exposed to fusion-relevant plasmaen_AU
dc.typeJournal Articleen_AU
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