Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade
For the first time, material analysis techniques have been applied to study the effect of ion cyclotron wall conditioning (ICWC) on probe surfaces in a metal-wall machine. ICWC is a technique envisaged to contribute to the removal of fuel and impurities from the first wall of ITER. The objective of...
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doaj-4fa89fcafe7f4c6b9649d9af2e5c30802020-11-25T00:31:54ZengElsevierNuclear Materials and Energy2352-17912017-08-0112733735Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgradeA. Garcia-Carrasco0P. Petersson1T. Schwarz-Selinger2T. Wauters3D. Douai4V. Bobkov5R. Cavazzana6K. Krieger7A. Lyssoivan8S. Möller9M. Spolaore10V. Rohde11M. Rubel12Department of Fusion Plasma Physics, Royal Institute of Technology (KTH), 100 44 Stockholm, SwedenDepartment of Fusion Plasma Physics, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden; Corresponding author.Max-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, D-85748 Garching, GermanyLaboratory for Plasma Physics, ERM/KMS, 1000 Brussels, BelgiumCEA, IRFM, F-13108St-Paul-Lez-Durance, FranceMax-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, D-85748 Garching, GermanyConsorzio RFX (CNR, ENEA, INFN, Universit di Padova, Acciaierie Venete Spa) Corso Stati Uniti 4, 35127 Padova, ItalyMax-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, D-85748 Garching, GermanyLaboratory for Plasma Physics, ERM/KMS, 1000 Brussels, BelgiumInstitute of Energy and Climate Research Plasma Physics, Forschungszentrum Jülich GmbH, 52425 Julich, GermanyConsorzio RFX (CNR, ENEA, INFN, Universit di Padova, Acciaierie Venete Spa) Corso Stati Uniti 4, 35127 Padova, ItalyMax-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, D-85748 Garching, GermanyDepartment of Fusion Plasma Physics, Royal Institute of Technology (KTH), 100 44 Stockholm, SwedenFor the first time, material analysis techniques have been applied to study the effect of ion cyclotron wall conditioning (ICWC) on probe surfaces in a metal-wall machine. ICWC is a technique envisaged to contribute to the removal of fuel and impurities from the first wall of ITER. The objective of this work was to assess impurity migration under ICWC operation. Tungsten probes were exposed in ASDEX Upgrade to discharges in helium. After wall conditioning, the probes were covered with a co-deposited layer containing D, B, C, N, O and relatively high amount of He. The concentration ratio He/C+B was 0.7. The formation of the co-deposited layer indicates that a fraction of the impurities desorbed from the wall under ICWC operation are transported by plasma and deposited away from their original location. Keywords: ICWC, Erosion-deposition, Fuel removal, Ion beam analysis, ASDEX Upgradehttp://www.sciencedirect.com/science/article/pii/S2352179116302058 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. Garcia-Carrasco P. Petersson T. Schwarz-Selinger T. Wauters D. Douai V. Bobkov R. Cavazzana K. Krieger A. Lyssoivan S. Möller M. Spolaore V. Rohde M. Rubel |
spellingShingle |
A. Garcia-Carrasco P. Petersson T. Schwarz-Selinger T. Wauters D. Douai V. Bobkov R. Cavazzana K. Krieger A. Lyssoivan S. Möller M. Spolaore V. Rohde M. Rubel Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade Nuclear Materials and Energy |
author_facet |
A. Garcia-Carrasco P. Petersson T. Schwarz-Selinger T. Wauters D. Douai V. Bobkov R. Cavazzana K. Krieger A. Lyssoivan S. Möller M. Spolaore V. Rohde M. Rubel |
author_sort |
A. Garcia-Carrasco |
title |
Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade |
title_short |
Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade |
title_full |
Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade |
title_fullStr |
Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade |
title_full_unstemmed |
Investigation of probe surfaces after ion cyclotron wall conditioning in ASDEX upgrade |
title_sort |
investigation of probe surfaces after ion cyclotron wall conditioning in asdex upgrade |
publisher |
Elsevier |
series |
Nuclear Materials and Energy |
issn |
2352-1791 |
publishDate |
2017-08-01 |
description |
For the first time, material analysis techniques have been applied to study the effect of ion cyclotron wall conditioning (ICWC) on probe surfaces in a metal-wall machine. ICWC is a technique envisaged to contribute to the removal of fuel and impurities from the first wall of ITER. The objective of this work was to assess impurity migration under ICWC operation. Tungsten probes were exposed in ASDEX Upgrade to discharges in helium. After wall conditioning, the probes were covered with a co-deposited layer containing D, B, C, N, O and relatively high amount of He. The concentration ratio He/C+B was 0.7. The formation of the co-deposited layer indicates that a fraction of the impurities desorbed from the wall under ICWC operation are transported by plasma and deposited away from their original location. Keywords: ICWC, Erosion-deposition, Fuel removal, Ion beam analysis, ASDEX Upgrade |
url |
http://www.sciencedirect.com/science/article/pii/S2352179116302058 |
work_keys_str_mv |
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