Deposition of 13C tracer in the JET MkII-HD divertor

Jari Likonen, Antti Hakola, Seppo Koivuranta, Markus Airila, J.P. Coad, A. Widdowson, J. Strachan, M. Rubel, S. Brezinsek, S. Grünhagen, M. Stamp, JET- EFDA contributors

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)

    Abstract

    Migration of 13C has been investigated at JET by injecting 13C-labelled methane at the outer divertor base at the end of the 2009 campaign. The 13C deposition profiles on carbon fibre composite divertor tiles were measured by secondary ion mass spectrometry and Rutherford backscattering techniques. 13C was mainly deposited near the puffing location on the outer divertor base tiles. High amounts of 13C were also found at the outer vertical target: at the bottom of the lower and at the top of the upper plates. Thirty-three percent of puffed 13CH4 was instantly pumped out by the divertor cryopump, which is close to the pump duct entrance. Global 13C transport in the torus was modelled by the EDGE2D/EIRENE and DIVIMP codes, and local 13C migration in the vicinity of the injection location by the ERO code. The DIVIMP and EDGE2D simulations show strong prompt deposition of 13C directly adjacent to the injection point as well as in the far scrape-off layer (SOL) along both the inner and outer divertor targets. In addition, the measured 13C deposition along the outer divertor wall tiles is qualitatively reproduced. However, EDGE2D and DIVIMP do not predict any deposition along the divertor surfaces facing the private plasma on the inner floor tile and inboard of the outer strike point on tile 5. The ERO calculations also indicate that most of the deposition occurs close to the injection location on the vertical face of the LBSRP tile and the horizontal part of tile 6
    Original languageEnglish
    Article number014004
    Number of pages8
    JournalPhysica Scripta
    Issue numberT145
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    tiles
    Tile
    tracers
    Injection
    injection
    Migration
    Vertical
    Target
    Carbon Fiber
    Backscattering
    fiber composites
    Methane
    Mass Spectrometry
    carbon fibers
    ducts
    entrances
    secondary ion mass spectrometry
    Percent
    Pump
    backscattering

    Cite this

    Likonen, Jari ; Hakola, Antti ; Koivuranta, Seppo ; Airila, Markus ; Coad, J.P. ; Widdowson, A. ; Strachan, J. ; Rubel, M. ; Brezinsek, S. ; Grünhagen, S. ; Stamp, M. ; contributors, JET- EFDA. / Deposition of 13C tracer in the JET MkII-HD divertor. In: Physica Scripta. 2011 ; No. T145.
    @article{49ee55b2780a4eff867a81870a798cae,
    title = "Deposition of 13C tracer in the JET MkII-HD divertor",
    abstract = "Migration of 13C has been investigated at JET by injecting 13C-labelled methane at the outer divertor base at the end of the 2009 campaign. The 13C deposition profiles on carbon fibre composite divertor tiles were measured by secondary ion mass spectrometry and Rutherford backscattering techniques. 13C was mainly deposited near the puffing location on the outer divertor base tiles. High amounts of 13C were also found at the outer vertical target: at the bottom of the lower and at the top of the upper plates. Thirty-three percent of puffed 13CH4 was instantly pumped out by the divertor cryopump, which is close to the pump duct entrance. Global 13C transport in the torus was modelled by the EDGE2D/EIRENE and DIVIMP codes, and local 13C migration in the vicinity of the injection location by the ERO code. The DIVIMP and EDGE2D simulations show strong prompt deposition of 13C directly adjacent to the injection point as well as in the far scrape-off layer (SOL) along both the inner and outer divertor targets. In addition, the measured 13C deposition along the outer divertor wall tiles is qualitatively reproduced. However, EDGE2D and DIVIMP do not predict any deposition along the divertor surfaces facing the private plasma on the inner floor tile and inboard of the outer strike point on tile 5. The ERO calculations also indicate that most of the deposition occurs close to the injection location on the vertical face of the LBSRP tile and the horizontal part of tile 6",
    author = "Jari Likonen and Antti Hakola and Seppo Koivuranta and Markus Airila and J.P. Coad and A. Widdowson and J. Strachan and M. Rubel and S. Brezinsek and S. Gr{\"u}nhagen and M. Stamp and contributors, {JET- EFDA}",
    year = "2011",
    doi = "10.1088/0031-8949/2011/T145/014004",
    language = "English",
    journal = "Physica Scripta",
    issn = "0031-8949",
    publisher = "Institute of Physics IOP",
    number = "T145",

    }

    Likonen, J, Hakola, A, Koivuranta, S, Airila, M, Coad, JP, Widdowson, A, Strachan, J, Rubel, M, Brezinsek, S, Grünhagen, S, Stamp, M & contributors, JETEFDA 2011, 'Deposition of 13C tracer in the JET MkII-HD divertor', Physica Scripta, no. T145, 014004. https://doi.org/10.1088/0031-8949/2011/T145/014004

    Deposition of 13C tracer in the JET MkII-HD divertor. / Likonen, Jari; Hakola, Antti; Koivuranta, Seppo; Airila, Markus; Coad, J.P.; Widdowson, A.; Strachan, J.; Rubel, M.; Brezinsek, S.; Grünhagen, S.; Stamp, M.; contributors, JET- EFDA.

    In: Physica Scripta, No. T145, 014004, 2011.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Deposition of 13C tracer in the JET MkII-HD divertor

    AU - Likonen, Jari

    AU - Hakola, Antti

    AU - Koivuranta, Seppo

    AU - Airila, Markus

    AU - Coad, J.P.

    AU - Widdowson, A.

    AU - Strachan, J.

    AU - Rubel, M.

    AU - Brezinsek, S.

    AU - Grünhagen, S.

    AU - Stamp, M.

    AU - contributors, JET- EFDA

    PY - 2011

    Y1 - 2011

    N2 - Migration of 13C has been investigated at JET by injecting 13C-labelled methane at the outer divertor base at the end of the 2009 campaign. The 13C deposition profiles on carbon fibre composite divertor tiles were measured by secondary ion mass spectrometry and Rutherford backscattering techniques. 13C was mainly deposited near the puffing location on the outer divertor base tiles. High amounts of 13C were also found at the outer vertical target: at the bottom of the lower and at the top of the upper plates. Thirty-three percent of puffed 13CH4 was instantly pumped out by the divertor cryopump, which is close to the pump duct entrance. Global 13C transport in the torus was modelled by the EDGE2D/EIRENE and DIVIMP codes, and local 13C migration in the vicinity of the injection location by the ERO code. The DIVIMP and EDGE2D simulations show strong prompt deposition of 13C directly adjacent to the injection point as well as in the far scrape-off layer (SOL) along both the inner and outer divertor targets. In addition, the measured 13C deposition along the outer divertor wall tiles is qualitatively reproduced. However, EDGE2D and DIVIMP do not predict any deposition along the divertor surfaces facing the private plasma on the inner floor tile and inboard of the outer strike point on tile 5. The ERO calculations also indicate that most of the deposition occurs close to the injection location on the vertical face of the LBSRP tile and the horizontal part of tile 6

    AB - Migration of 13C has been investigated at JET by injecting 13C-labelled methane at the outer divertor base at the end of the 2009 campaign. The 13C deposition profiles on carbon fibre composite divertor tiles were measured by secondary ion mass spectrometry and Rutherford backscattering techniques. 13C was mainly deposited near the puffing location on the outer divertor base tiles. High amounts of 13C were also found at the outer vertical target: at the bottom of the lower and at the top of the upper plates. Thirty-three percent of puffed 13CH4 was instantly pumped out by the divertor cryopump, which is close to the pump duct entrance. Global 13C transport in the torus was modelled by the EDGE2D/EIRENE and DIVIMP codes, and local 13C migration in the vicinity of the injection location by the ERO code. The DIVIMP and EDGE2D simulations show strong prompt deposition of 13C directly adjacent to the injection point as well as in the far scrape-off layer (SOL) along both the inner and outer divertor targets. In addition, the measured 13C deposition along the outer divertor wall tiles is qualitatively reproduced. However, EDGE2D and DIVIMP do not predict any deposition along the divertor surfaces facing the private plasma on the inner floor tile and inboard of the outer strike point on tile 5. The ERO calculations also indicate that most of the deposition occurs close to the injection location on the vertical face of the LBSRP tile and the horizontal part of tile 6

    U2 - 10.1088/0031-8949/2011/T145/014004

    DO - 10.1088/0031-8949/2011/T145/014004

    M3 - Article

    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

    IS - T145

    M1 - 014004

    ER -