Long-term erosion and deposition studies of the main graphite limiter in TEXTOR

A. Kreter, A. Kirschner, P. Wienhold, Jari Likonen, M. Mayer, V. Philipps, U. Samm, G. Sergienko

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.
    Original languageEnglish
    Pages (from-to)35-39
    JournalPhysica Scripta
    VolumeT128
    DOIs
    Publication statusPublished - 2007
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Limiter
    Graphite
    tiles
    Erosion
    Tile
    erosion
    graphite
    markers
    Incidence
    incidence
    Profilometry
    Angle
    secondary ion mass spectrometry
    dilution
    fluence
    Plasma
    Magnetic Field
    Modeling
    magnetic fields
    ions

    Keywords

    • JET
    • plasma
    • fusion energy
    • fusion reactors
    • ITER
    • plasma toroidal confinement
    • divertor tiles

    Cite this

    Kreter, A., Kirschner, A., Wienhold, P., Likonen, J., Mayer, M., Philipps, V., ... Sergienko, G. (2007). Long-term erosion and deposition studies of the main graphite limiter in TEXTOR. Physica Scripta, T128, 35-39. https://doi.org/10.1088/0031-8949/2007/T128/007
    Kreter, A. ; Kirschner, A. ; Wienhold, P. ; Likonen, Jari ; Mayer, M. ; Philipps, V. ; Samm, U. ; Sergienko, G. / Long-term erosion and deposition studies of the main graphite limiter in TEXTOR. In: Physica Scripta. 2007 ; Vol. T128. pp. 35-39.
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    title = "Long-term erosion and deposition studies of the main graphite limiter in TEXTOR",
    abstract = "Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.",
    keywords = "JET, plasma, fusion energy, fusion reactors, ITER, plasma toroidal confinement, divertor tiles",
    author = "A. Kreter and A. Kirschner and P. Wienhold and Jari Likonen and M. Mayer and V. Philipps and U. Samm and G. Sergienko",
    year = "2007",
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    Kreter, A, Kirschner, A, Wienhold, P, Likonen, J, Mayer, M, Philipps, V, Samm, U & Sergienko, G 2007, 'Long-term erosion and deposition studies of the main graphite limiter in TEXTOR', Physica Scripta, vol. T128, pp. 35-39. https://doi.org/10.1088/0031-8949/2007/T128/007

    Long-term erosion and deposition studies of the main graphite limiter in TEXTOR. / Kreter, A.; Kirschner, A.; Wienhold, P.; Likonen, Jari; Mayer, M.; Philipps, V.; Samm, U.; Sergienko, G.

    In: Physica Scripta, Vol. T128, 2007, p. 35-39.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Long-term erosion and deposition studies of the main graphite limiter in TEXTOR

    AU - Kreter, A.

    AU - Kirschner, A.

    AU - Wienhold, P.

    AU - Likonen, Jari

    AU - Mayer, M.

    AU - Philipps, V.

    AU - Samm, U.

    AU - Sergienko, G.

    PY - 2007

    Y1 - 2007

    N2 - Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.

    AB - Erosion and deposition behaviour of the TEXTOR main toroidal belt limiter ALT-II has been studied for two generations of limiter tiles with different surface shapes. Two specially prepared tiles with marker holes were subsequently exposed during experimental campaigns with a total plasma duration of >7000 s and a surface averaged background ion fluence exceeding 2×1025 m−2. The tile surface relief was measured by optical profilometry and SIMS before and after the exposure. The highest surface erosion of >10 μm on both tiles was observed in regions with an angle of incidence of the magnetic field α of gsim1°, whereas in the regions with α~0.1° both net-erosion and net-deposition were observed depending on the tile shaping. The marker holes were always deposition dominated. Modelling by the ERO code explains qualitatively the surface erosion and deposition behaviour in terms of background flux dilution for shallow angles of incidence.

    KW - JET

    KW - plasma

    KW - fusion energy

    KW - fusion reactors

    KW - ITER

    KW - plasma toroidal confinement

    KW - divertor tiles

    U2 - 10.1088/0031-8949/2007/T128/007

    DO - 10.1088/0031-8949/2007/T128/007

    M3 - Article

    VL - T128

    SP - 35

    EP - 39

    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

    ER -