Initial damage processes for diamond film exposure to hydrogen plasma

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dc.contributor.authorDeslandes, Aen_AU
dc.contributor.authorGuenette, MCen_AU
dc.contributor.authorSamuell, CMen_AU
dc.contributor.authorKaratchevtseva, Ien_AU
dc.contributor.authorIonescu, Men_AU
dc.contributor.authorCohen, DDen_AU
dc.contributor.authorBlackwell, Ben_AU
dc.contributor.authorCorr, CSen_AU
dc.contributor.authorRiley, DPen_AU
dc.date.accessioned2014-04-23T06:54:48Zen_AU
dc.date.available2014-04-23T06:54:48Zen_AU
dc.date.issued2013-12-01en_AU
dc.date.statistics2014-04-23en_AU
dc.description.abstractDiamond is considered to be a possible alternative to other carbon based materials as a plasma facing material in nuclear fusion devices due to its high thermal conductivity and resistance to chemical erosion. In this work CVD diamond films were exposed to hydrogen plasma in the MAGnetized Plasma Interaction Experiment (MAGPIE): a linear plasma device at the Australian National University which simulates plasma conditions relevant to nuclear fusion. Various negative sample stage biases of magnitude less than 500 V were applied to control the energies of impinging ions. Characterisation results from SEM, Raman spectroscopy and ERDA are presented. No measureable quantity of hydrogen retention was observed, this is either due to no incorporation of hydrogen into the diamond structure or due to initial incorporation as a hydrocarbon followed by subsequent etching back into the plasma. A model is presented for the initial stages of diamond erosion in fusion relevant hydrogen plasma that involves chemical erosion of non-diamond material from the surface by hydrogen radicals and damage to the subsurface region from energetic hydrogen ions. These results show that the initial damage processes in this plasma regime are comparable to previous studies of the fundamental processes as reported for less extreme plasma such as in the development of diamond films. © 2013, Elsevier Ltd.en_AU
dc.identifier.citationDeslandes, A., Guenette, M. C., Samuell, C. M., Karatchevtseva, I., Ionescu, M., Cohen, D. D., Blackwell, B., Corr, C., & Riley, D. P. (2013). Initial damage processes for diamond film exposure to hydrogen plasma. Fusion Engineering & Design, 88(12), 3101-3107. doi:10.1616/j.fusengdes.2013.08.010en_AU
dc.identifier.govdoc5482en_AU
dc.identifier.issn0920-3796en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitleFusion Engineering & Designen_AU
dc.identifier.pagination3101-3107en_AU
dc.identifier.urihttps://doi.org/10.1016/j.fusengdes.2013.08.010en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5476en_AU
dc.identifier.volume88en_AU
dc.language.isoenen_AU
dc.publisherElsevier Scienceen_AU
dc.subjectFilmsen_AU
dc.subjectHydrogenen_AU
dc.subjectPlasmaen_AU
dc.subjectDiamondsen_AU
dc.subjectCarbonen_AU
dc.subjectRaman spectroscopyen_AU
dc.titleInitial damage processes for diamond film exposure to hydrogen plasmaen_AU
dc.typeJournal Articleen_AU
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