Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines

Mitja Kelemen; Anze Zaloznik; Primoz Vavpetic; Matic Pecovnik; Primoz Pelicon; Antti Hakola; Aki Lahtinen; Juuso Karhunen; Kaarel Piip; Peeter Paris; Matti Laan; Karl Krieger; Martin Oberkofler; Hennie van der Meiden; Sabina Markelj; ASDEX Upgrade Team

doi:10.1016/j.nimb.2017.01.072

Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines

Mitja Kelemen, Anze Zaloznik, Primoz Vavpetic, Matic Pecovnik, Primoz Pelicon, Antti Hakola, Aki Lahtinen, Juuso Karhunen, Kaarel Piip, Peeter Paris, Matti Laan, Karl Krieger, Martin Oberkofler, Hennie van der Meiden, Sabina Markelj, ASDEX Upgrade Team

Research output: Contribution to journal › Article › Scientific › peer-review

6 Citations (Scopus)

Abstract

Micro nuclear reaction analysis (micro-NRA) exploiting the nuclear reaction D(3He,p)4He was used for post-mortem analyses of special marker samples, exposed to deuterium plasma inside ASDEX Upgrade (AUG) tokamak and to the deuterium plasma jet in the Pilot-PSI linear plasma gun. Lateral concentration profiles of deuterium and erosion/deposition profiles of the marker materials were obtained by a combination of micro-NRA and particle induced X-ray emission by 3He beam (3HIXE). In the case of AUG samples, where 25nm thick W marker layers had been deposited on unpolished and polished graphite substrates, the effect of surface roughness on local erosion and deposition was also investigated. The lateral distribution of W concentration showed that erosion is much more distinct in the case of polished samples and the resulting surface shows a "leopard" skin pattern of W accumulated on carbon aggregates left on the surface from polishing. The Pilot-PSI samples indicated preferential accumulation of deuterium a few mm off from the centre of the region affected by the plasma beam. This is connected with the largest surface modifications while the thick deposited layers at the centre do not favour deuterium retention per se. The results were cross correlated with those obtained using laser-induced breakdown spectroscopy (LIBS). With its quantitative abilities, micro-NRA provided essential calibration data for in situ LIBS operation, as well as for complementary post mortem Secondary Ion Mass Spectroscopy (SIMS).

Original language	English
Pages (from-to)	179-184
Journal	Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume	404
DOIs	https://doi.org/10.1016/j.nimb.2017.01.072
Publication status	Published - 1 Aug 2017
MoE publication type	A1 Journal article-refereed

Keywords

focused ion beams
deuterium
3He
nuclear reaction analysis
3HIXE
Deuterium
He

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nimb.2017.01.072

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Kelemen, M., Zaloznik, A., Vavpetic, P., Pecovnik, M., Pelicon, P., Hakola, A., Lahtinen, A., Karhunen, J., Piip, K., Paris, P., Laan, M., Krieger, K., Oberkofler, M., van der Meiden, H., Markelj, S., & ASDEX Upgrade Team (2017). Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines. Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 404, 179-184. https://doi.org/10.1016/j.nimb.2017.01.072

@article{114d51766edc4bb9a139f17de0ffca0e,

title = "Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines",

abstract = "Micro nuclear reaction analysis (micro-NRA) exploiting the nuclear reaction D(3He,p)4He was used for post-mortem analyses of special marker samples, exposed to deuterium plasma inside ASDEX Upgrade (AUG) tokamak and to the deuterium plasma jet in the Pilot-PSI linear plasma gun. Lateral concentration profiles of deuterium and erosion/deposition profiles of the marker materials were obtained by a combination of micro-NRA and particle induced X-ray emission by 3He beam (3HIXE). In the case of AUG samples, where 25nm thick W marker layers had been deposited on unpolished and polished graphite substrates, the effect of surface roughness on local erosion and deposition was also investigated. The lateral distribution of W concentration showed that erosion is much more distinct in the case of polished samples and the resulting surface shows a {"}leopard{"} skin pattern of W accumulated on carbon aggregates left on the surface from polishing. The Pilot-PSI samples indicated preferential accumulation of deuterium a few mm off from the centre of the region affected by the plasma beam. This is connected with the largest surface modifications while the thick deposited layers at the centre do not favour deuterium retention per se. The results were cross correlated with those obtained using laser-induced breakdown spectroscopy (LIBS). With its quantitative abilities, micro-NRA provided essential calibration data for in situ LIBS operation, as well as for complementary post mortem Secondary Ion Mass Spectroscopy (SIMS).",

keywords = "focused ion beams, deuterium, 3He, nuclear reaction analysis, 3HIXE, Deuterium, He",

author = "Mitja Kelemen and Anze Zaloznik and Primoz Vavpetic and Matic Pecovnik and Primoz Pelicon and Antti Hakola and Aki Lahtinen and Juuso Karhunen and Kaarel Piip and Peeter Paris and Matti Laan and Karl Krieger and Martin Oberkofler and {van der Meiden}, Hennie and Sabina Markelj and {ASDEX Upgrade Team}",

note = "Funding Information: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. Work was performed under EUROfusion WP PFC. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Publisher Copyright: {\textcopyright} 2017 Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2017",

month = aug,

day = "1",

doi = "10.1016/j.nimb.2017.01.072",

language = "English",

volume = "404",

pages = "179--184",

journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier B.V.",

}

Kelemen, M, Zaloznik, A, Vavpetic, P, Pecovnik, M, Pelicon, P, Hakola, A, Lahtinen, A, Karhunen, J, Piip, K, Paris, P, Laan, M, Krieger, K, Oberkofler, M, van der Meiden, H, Markelj, S & ASDEX Upgrade Team 2017, 'Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines', Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, vol. 404, pp. 179-184. https://doi.org/10.1016/j.nimb.2017.01.072

Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines. / Kelemen, Mitja; Zaloznik, Anze; Vavpetic, Primoz et al.
In: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, Vol. 404, 01.08.2017, p. 179-184.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines

AU - Kelemen, Mitja

AU - Zaloznik, Anze

AU - Vavpetic, Primoz

AU - Pecovnik, Matic

AU - Pelicon, Primoz

AU - Hakola, Antti

AU - Lahtinen, Aki

AU - Karhunen, Juuso

AU - Piip, Kaarel

AU - Paris, Peeter

AU - Laan, Matti

AU - Krieger, Karl

AU - Oberkofler, Martin

AU - van der Meiden, Hennie

AU - Markelj, Sabina

AU - ASDEX Upgrade Team

N1 - Funding Information: This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. Work was performed under EUROfusion WP PFC. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Publisher Copyright: © 2017 Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Micro nuclear reaction analysis (micro-NRA) exploiting the nuclear reaction D(3He,p)4He was used for post-mortem analyses of special marker samples, exposed to deuterium plasma inside ASDEX Upgrade (AUG) tokamak and to the deuterium plasma jet in the Pilot-PSI linear plasma gun. Lateral concentration profiles of deuterium and erosion/deposition profiles of the marker materials were obtained by a combination of micro-NRA and particle induced X-ray emission by 3He beam (3HIXE). In the case of AUG samples, where 25nm thick W marker layers had been deposited on unpolished and polished graphite substrates, the effect of surface roughness on local erosion and deposition was also investigated. The lateral distribution of W concentration showed that erosion is much more distinct in the case of polished samples and the resulting surface shows a "leopard" skin pattern of W accumulated on carbon aggregates left on the surface from polishing. The Pilot-PSI samples indicated preferential accumulation of deuterium a few mm off from the centre of the region affected by the plasma beam. This is connected with the largest surface modifications while the thick deposited layers at the centre do not favour deuterium retention per se. The results were cross correlated with those obtained using laser-induced breakdown spectroscopy (LIBS). With its quantitative abilities, micro-NRA provided essential calibration data for in situ LIBS operation, as well as for complementary post mortem Secondary Ion Mass Spectroscopy (SIMS).

AB - Micro nuclear reaction analysis (micro-NRA) exploiting the nuclear reaction D(3He,p)4He was used for post-mortem analyses of special marker samples, exposed to deuterium plasma inside ASDEX Upgrade (AUG) tokamak and to the deuterium plasma jet in the Pilot-PSI linear plasma gun. Lateral concentration profiles of deuterium and erosion/deposition profiles of the marker materials were obtained by a combination of micro-NRA and particle induced X-ray emission by 3He beam (3HIXE). In the case of AUG samples, where 25nm thick W marker layers had been deposited on unpolished and polished graphite substrates, the effect of surface roughness on local erosion and deposition was also investigated. The lateral distribution of W concentration showed that erosion is much more distinct in the case of polished samples and the resulting surface shows a "leopard" skin pattern of W accumulated on carbon aggregates left on the surface from polishing. The Pilot-PSI samples indicated preferential accumulation of deuterium a few mm off from the centre of the region affected by the plasma beam. This is connected with the largest surface modifications while the thick deposited layers at the centre do not favour deuterium retention per se. The results were cross correlated with those obtained using laser-induced breakdown spectroscopy (LIBS). With its quantitative abilities, micro-NRA provided essential calibration data for in situ LIBS operation, as well as for complementary post mortem Secondary Ion Mass Spectroscopy (SIMS).

KW - focused ion beams

KW - deuterium

KW - 3He

KW - nuclear reaction analysis

KW - 3HIXE

KW - Deuterium

KW - He

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U2 - 10.1016/j.nimb.2017.01.072

DO - 10.1016/j.nimb.2017.01.072

M3 - Article

SN - 0168-583X

VL - 404

SP - 179

EP - 184

JO - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

ER -

Micro-NRA and micro-3HIXE with 3He microbeam on samples exposed in ASDEX Upgrade and Pilot-PSI machines

Abstract

Keywords

UN SDGs

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