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 journalArticleScientificpeer-review

7 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,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.
Original languageEnglish
Pages (from-to)1838-1841
Number of pages4
JournalNuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
Volume268
Issue number11-12
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint

Microanalysis
microanalysis
Ion beams
Beryllium
Deposits
Deuterium
beryllium
ion beams
deposits
deuterium
Joint European Torus
Nuclear reactions
surface treatment
Polishing
polishing
nuclear reactions
Surface treatment
cut-off
spatial resolution
Carbon

Keywords

  • Beryllium
  • Deuterium
  • Micro-beam
  • Nuclear reaction analysis

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.",
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language = "English",
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Ion beam micro analysis of deposits at tokamak divertor surfaces. / Petersson, P. (Corresponding Author); Bergsåker, H.; Possnert, G.; Coad, J. P.; Koivuranta, Seppo; Likonen, Jari.

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 journalArticleScientificpeer-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

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

SN - 0168-583X

IS - 11-12

ER -