Determination of deuterium depth profiles in fusion-relevant wall materials by nanosecond LIBS

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Suchonova, Maria Veis, Pavel Karhunen, Juuso Paris, Peeter Pribula, Marek Piip, Kaarel Laan, Matti Porosnicu, Corneliu Lungu, Christian Hakola, Antti 2017-08-03T12:10:02Z 2017-08-03T12:10:02Z 2017-08
dc.identifier.citation Suchonova , M , Veis , P , Karhunen , J , Paris , P , Pribula , M , Piip , K , Laan , M , Porosnicu , C , Lungu , C & Hakola , A 2016 , ' Determination of deuterium depth profiles in fusion-relevant wall materials by nanosecond LIBS ' Nuclear Materials and Energy . DOI: 10.1016/j.nme.2017.05.013 en
dc.identifier.issn 2352-1791
dc.identifier.other PURE UUID: a59cebb2-019f-490b-8048-ff471ead0a67
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE FILEURL:
dc.description.abstract The ablation and fuel-retention characteristics of aluminum-tungsten (AlW) and beryllium-tungsten (BeW) samples have been determined using Laser Induced Breakdown Spectroscopy (LIBS) and compared to results obtained using Secondary Ion Mass Spectrometry (SIMS). The measurements have been made both at vacuum (of the order of 10-4 Pa) and at 50Pa of argon to especially enhance the intensities of the spectral lines of H and D. For reliable evaluation of the ablation rate of the samples the electron density ne and temperature Te of the LIBS plasma have been determined with the help of selected of spectral lines of Be, Al, and W. The electron density ne has been obtained from Stark broadening lines of Al I (308.7nm and 394.4nm) and Be II (457.3nm) and Te from the Saha-Boltzmann plot using W I and W II spectral lines having a higher value of the energy of upper states in order to prevent the influence of self-absorption on the results. The results indicate similar ablation characteristics between AlW (AlWD) and BeW(BeWD) samples but the inclusion of deuterium in the coating increases the ablation rate by a factor of 10 for both sample types. Concerning fuel retention more than one order of magnitude less D is retained in the AlWD sample than in BeWD. In the presence of background argon, the H and D lines were stronger and more easily distinguishable. This is a positive sign considering the real application in ITER where LIBS measurements are foreseen to be done during maintenance breaks. However the higher pressure gave a better signal, it is still far from the measurement conditions planned for ITER which need to be tested separately. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Nuclear Materials and Energy en
dc.rights openAccess en
dc.subject.other 114 Physical sciences en
dc.title Determination of deuterium depth profiles in fusion-relevant wall materials by nanosecond LIBS en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Comenius University
dc.contributor.department Department of Applied Physics
dc.contributor.department University of Tartu
dc.contributor.department National Institute for Laser, Plasma and Radiation Physics
dc.subject.keyword Aluminum
dc.subject.keyword Beryllium
dc.subject.keyword LIBS
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201708036376
dc.identifier.doi 10.1016/j.nme.2017.05.013
dc.type.version proof

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