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NEXAFS spectroscopy of CVD diamond films exposed to fusion relevant hydrogen plasma

Guenette, Mathew C; Deslandes, Alec; Samuell, Cameron; Tadich, Anton; Thomsen, Lars; Cowie, Bruce C. C.; Corr, Cormac; Riley, Daniel

Description

A series of CVD diamond films have been exposed to hydrogen plasma in the linear magnetized plasma device, MAGPIE, with various applied sample stage biases between 0 V (no applied bias) to - 500 V. The plasma-induced damage to the surface structure of the diamond films has been investigated by Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy in both the Auger electron yield (AEY) and total fluorescence yield (TFY) modes. The key diamond NEXAFS spectral features (diamond core...[Show more]

dc.contributor.authorGuenette, Mathew C
dc.contributor.authorDeslandes, Alec
dc.contributor.authorSamuell, Cameron
dc.contributor.authorTadich, Anton
dc.contributor.authorThomsen, Lars
dc.contributor.authorCowie, Bruce C. C.
dc.contributor.authorCorr, Cormac
dc.contributor.authorRiley, Daniel
dc.date.accessioned2015-12-13T22:18:20Z
dc.identifier.issn0925-9635
dc.identifier.urihttp://hdl.handle.net/1885/71591
dc.description.abstractA series of CVD diamond films have been exposed to hydrogen plasma in the linear magnetized plasma device, MAGPIE, with various applied sample stage biases between 0 V (no applied bias) to - 500 V. The plasma-induced damage to the surface structure of the diamond films has been investigated by Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy in both the Auger electron yield (AEY) and total fluorescence yield (TFY) modes. The key diamond NEXAFS spectral features (diamond core exciton and second absolute band gap) are found to be diminished following plasma exposure as measured in the surface sensitive, AEY spectra, whilst these features remain unchanged relative to an unexposed diamond reference film as measured using the bulk sensitive, TFY spectra. These results, in conjunction with SRIM simulations, show definitively that the damage to the surface of the diamond films is restricted to the scale of the penetration depth of the H ions and no damage is induced at greater depths. The power and sensitivity of NEXAFS spectroscopy in assessing damage to the surface of diamond from fusion-relevant plasma-surface interactions are demonstrated.
dc.publisherElsevier
dc.sourceDiamond and Related Materials
dc.subjectKeywords: Keywords; Near-edge X-ray absorption fine structure spectroscopies; Nuclear fusion; Plasma damage; Plasma-induced damage; Plasma-surface interactions; Total fluorescence yields; XANES; Diamonds; Plasma interactions; Surface structure; X ray absorption nea Keywords; Nuclear fusion; Plasma damage; Surface structure; XANES
dc.titleNEXAFS spectroscopy of CVD diamond films exposed to fusion relevant hydrogen plasma
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume34
dc.date.issued2013
local.identifier.absfor020204 - Plasma Physics; Fusion Plasmas; Electrical Discharges
local.identifier.ariespublicationf5625xPUB2786
local.type.statusPublished Version
local.contributor.affiliationGuenette, Mathew C, ANSTO
local.contributor.affiliationDeslandes, Alec, ANSTO
local.contributor.affiliationSamuell, Cameron, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTadich, Anton, Australian Synchrotron
local.contributor.affiliationThomsen, Lars, Australian Synchrotron
local.contributor.affiliationCowie, Bruce C. C., Australian Synchrotron
local.contributor.affiliationCorr, Cormac, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationRiley, Daniel, Australian Nuclear Science and Technology Organisation
local.description.embargo2037-12-31
local.bibliographicCitation.startpage45
local.bibliographicCitation.lastpage49
local.identifier.doi10.1016/j.diamond.2013.02.003
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-02-24T09:02:26Z
local.identifier.scopusID2-s2.0-84874905707
local.identifier.thomsonID000317795400008
CollectionsANU Research Publications

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