Ion beam micro analysis of deposits at tokamak divertor surfaces

P. Petersson; H. Bergsåker; G. Possnert; J. P. Coad; Seppo Koivuranta; Jari Likonen

doi:10.1016/j.nimb.2010.02.025

Ion beam micro analysis of deposits at tokamak divertor surfaces

P. Petersson (Corresponding Author), H. Bergsåker, G. Possnert, J. P. Coad, Seppo Koivuranta, Jari Likonen

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

9 Citations (Scopus)

Abstract

Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions ²D(³He,p)⁴He and ⁹Be(³He_,p_n)¹¹B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.

Original language	English
Pages (from-to)	1838-1841
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume	268
Issue number	11-12
DOIs	https://doi.org/10.1016/j.nimb.2010.02.025
Publication status	Published - 2010
MoE publication type	A1 Journal article-refereed

Keywords

Beryllium
Deuterium
Micro-beam
Nuclear reaction analysis

UN SDGs

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

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10.1016/j.nimb.2010.02.025

Cite this

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title = "Ion beam micro analysis of deposits at tokamak divertor surfaces",

abstract = "Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions 2D(3He,p)4He and 9Be(3He,pn)11B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.",

keywords = "Beryllium, Deuterium, Micro-beam, Nuclear reaction analysis",

author = "P. Petersson and H. Bergs{\aa}ker and G. Possnert and Coad, {J. P.} and Seppo Koivuranta and Jari Likonen",

year = "2010",

doi = "10.1016/j.nimb.2010.02.025",

language = "English",

volume = "268",

pages = "1838--1841",

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

issn = "0168-583X",

publisher = "Elsevier B.V.",

number = "11-12",

}

Ion beam micro analysis of deposits at tokamak divertor surfaces. / Petersson, P. (Corresponding Author); Bergsåker, H.; Possnert, G. et al.
In: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, Vol. 268, No. 11-12, 2010, p. 1838-1841.

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

TY - JOUR

T1 - Ion beam micro analysis of deposits at tokamak divertor surfaces

AU - Petersson, P.

AU - Bergsåker, H.

AU - Possnert, G.

AU - Coad, J. P.

AU - Koivuranta, Seppo

AU - Likonen, Jari

PY - 2010

Y1 - 2010

N2 - Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions 2D(3He,p)4He and 9Be(3He,pn)11B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.

AB - Cross sections of deposited layers in the Joint European Torus (JET) were analysed using the nuclear micro analysis at the Tandem Laboratory, Uppsala University. For deuterium and beryllium the nuclear reactions 2D(3He,p)4He and 9Be(3He,pn)11B were exploited for analysis. Typically the analyses have been made with 10 μm spatial resolution and a sensitivity of better than one atomic percent for beryllium or deuterium in carbon matrix. Comparing several different surface treatment techniques shows that polishing the sample surface give very good optical surface information but that some amount of deuterium and beryllium probably is removed. For good quantitative results the measurement can either be done on a rough surface or the top of the polished surface can be cut off.

KW - Beryllium

KW - Deuterium

KW - Micro-beam

KW - Nuclear reaction analysis

U2 - 10.1016/j.nimb.2010.02.025

DO - 10.1016/j.nimb.2010.02.025

M3 - Article

SN - 0168-583X

VL - 268

SP - 1838

EP - 1841

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

IS - 11-12

ER -

Ion beam micro analysis of deposits at tokamak divertor surfaces

Abstract

Keywords

UN SDGs

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