ERO modeling of Cr sputtering in the linear plasma device PSI-2

A. Eksaeva, D. Borodin, A. Kreter, D. Nishijima, A. Pospieszczyk, T. Schlummer, S. Ertmer, A. Terra, B. Unterberg, A. Kirschner, J. Romazanov, S. Brezinsek, M. Rasinski, S. Henderson, M. O'Mullane, H. Summers, M. Bluteau, E. Marenkov

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations

Abstract

The prediction of the first wall deterioration and possible plasma contamination by impurities is a high priority task for ITER. 3D Monte-Carlo code ERO is a tool for modeling of eroded impurity transport and spectroscopy in plasma devices useful for experiment interpretation. Chromium (Cr) is a fusion-relevant reactor wall element (e.g. component of RAFM steels expected for use in DEMO). Linear plasma devices including PSI-2 are effective tools for investigations of plasma-surface interaction effects, allowing continuous plasma operation and good control over irradiation parameters. Experiments on Cr sputtering were conducted at PSI-2. In these experiments the Cr erosion was measured by three techniques: mass loss of the sample, quartz micro-balance of deposited impurities at a distance from it and optical emission spectroscopy. Experiments were modeled with the 3D Monte-Carlo code ERO, previously validated by application to similar experiments with tungsten (W). The simulations are demonstrated to reproduce the main experimental outcomes proving the quality of the sputtering data used. A significant focuses of the paper is the usage and validation of atomic data (resent metastableresolved dataset from ADAS) for interpretation of Cr spectroscopy. Initial population of quasimetastable state was fitted by matching the modeling with the experimental line intensity profiles.

Original languageEnglish
Article number014051
JournalPhysica Scripta
Volume2017
Issue numberT170
DOIs
StatePublished - 1 Dec 2017
Externally publishedYes
Event16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017 - Neuss/Dusseldorf, Germany
Duration: 16 May 201719 May 2017

Bibliographical note

Publisher Copyright:
© 2017 Forschungszentrum Jülich.

Funding

The work is supported by the EUROfusion WP PFC. 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. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work is also supported by the US Department of Energy Grant No. DE-FG02-07ER54912. The work is supported by the EUROfusion WP PFC.

FundersFunder number
Euratom research and training programme 2014–2018
U.S. Department of EnergyDE-FG02-07ER54912
Horizon 2020 Framework Programme
H2020 Euratom633053

    Keywords

    • Chromium
    • Erosion
    • PSI-2
    • Physical sputtering
    • Spectroscopy

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