Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade

Felix Reimold, Matthias Bernert, Arne Kallenbach, Steffen Pozel, Marco Wischmeier, A. Scarabosio, D. Coster, Leena Aho-Mantila, ASDEX Upgrade Team

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

    Abstract

    Detached divertor operation in H-Mode is essential for future fusion reactors to be able to handle the occuring power fluxes into the divertor and to avoid major material erosion of the divertor targets. Complete detachment is characterized by a substantial reduction of plasma pressure along a fieldline from midplane to target across the whole Scrape-Off Layer.

    Complete detachment has only been observed at the inner target in the boronized full-tungsten wall tokamak ASDEX Upgrade so far. Recently, stable H-Mode operation with a completely detached plasma at both divertor targets has been achieved by significant nitrogen seeding. The pressure loss along the field line exceeded a factor of ten and the power flux was effectively reduced to negligible levels at both targets simultaneously. Tungsten sputtering at the targets is strongly reduced during detached plasma operation.

    This contribution will highlight the experimental results and show the accessible operational space for nitrogen induced detachment in H-Mode. Accompanying SOLPS-modeling of the detachment process will be presented.
    Original languageEnglish
    Title of host publicationDPG-Frühjahrstagung Jena 2013
    ChapterP: Fachverband Plasmaphysik
    Publication statusPublished - 2013
    EventDPG-Frühjahrstagung Jena 2013 - Jena, Germany
    Duration: 25 Feb 20131 Mar 2013

    Conference

    ConferenceDPG-Frühjahrstagung Jena 2013
    CountryGermany
    CityJena
    Period25/02/131/03/13

    Fingerprint

    detachment
    tungsten
    nitrogen
    plasma pressure
    fusion reactors
    inoculation
    erosion
    sputtering

    Cite this

    Reimold, F., Bernert, M., Kallenbach, A., Pozel, S., Wischmeier, M., Scarabosio, A., ... ASDEX Upgrade Team (2013). Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade. In DPG-Frühjahrstagung Jena 2013 [P6.3]
    Reimold, Felix ; Bernert, Matthias ; Kallenbach, Arne ; Pozel, Steffen ; Wischmeier, Marco ; Scarabosio, A. ; Coster, D. ; Aho-Mantila, Leena ; ASDEX Upgrade Team. / Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade. DPG-Frühjahrstagung Jena 2013. 2013.
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    title = "Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade",
    abstract = "Detached divertor operation in H-Mode is essential for future fusion reactors to be able to handle the occuring power fluxes into the divertor and to avoid major material erosion of the divertor targets. Complete detachment is characterized by a substantial reduction of plasma pressure along a fieldline from midplane to target across the whole Scrape-Off Layer.Complete detachment has only been observed at the inner target in the boronized full-tungsten wall tokamak ASDEX Upgrade so far. Recently, stable H-Mode operation with a completely detached plasma at both divertor targets has been achieved by significant nitrogen seeding. The pressure loss along the field line exceeded a factor of ten and the power flux was effectively reduced to negligible levels at both targets simultaneously. Tungsten sputtering at the targets is strongly reduced during detached plasma operation.This contribution will highlight the experimental results and show the accessible operational space for nitrogen induced detachment in H-Mode. Accompanying SOLPS-modeling of the detachment process will be presented.",
    author = "Felix Reimold and Matthias Bernert and Arne Kallenbach and Steffen Pozel and Marco Wischmeier and A. Scarabosio and D. Coster and Leena Aho-Mantila and {ASDEX Upgrade Team}",
    note = "CA2: TK202 SDA: ENE",
    year = "2013",
    language = "English",
    booktitle = "DPG-Fr{\"u}hjahrstagung Jena 2013",

    }

    Reimold, F, Bernert, M, Kallenbach, A, Pozel, S, Wischmeier, M, Scarabosio, A, Coster, D, Aho-Mantila, L & ASDEX Upgrade Team 2013, Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade. in DPG-Frühjahrstagung Jena 2013., P6.3, DPG-Frühjahrstagung Jena 2013, Jena, Germany, 25/02/13.

    Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade. / Reimold, Felix; Bernert, Matthias; Kallenbach, Arne; Pozel, Steffen; Wischmeier, Marco; Scarabosio, A.; Coster, D.; Aho-Mantila, Leena; ASDEX Upgrade Team.

    DPG-Frühjahrstagung Jena 2013. 2013. P6.3.

    Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

    TY - CHAP

    T1 - Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade

    AU - Reimold, Felix

    AU - Bernert, Matthias

    AU - Kallenbach, Arne

    AU - Pozel, Steffen

    AU - Wischmeier, Marco

    AU - Scarabosio, A.

    AU - Coster, D.

    AU - Aho-Mantila, Leena

    AU - ASDEX Upgrade Team

    N1 - CA2: TK202 SDA: ENE

    PY - 2013

    Y1 - 2013

    N2 - Detached divertor operation in H-Mode is essential for future fusion reactors to be able to handle the occuring power fluxes into the divertor and to avoid major material erosion of the divertor targets. Complete detachment is characterized by a substantial reduction of plasma pressure along a fieldline from midplane to target across the whole Scrape-Off Layer.Complete detachment has only been observed at the inner target in the boronized full-tungsten wall tokamak ASDEX Upgrade so far. Recently, stable H-Mode operation with a completely detached plasma at both divertor targets has been achieved by significant nitrogen seeding. The pressure loss along the field line exceeded a factor of ten and the power flux was effectively reduced to negligible levels at both targets simultaneously. Tungsten sputtering at the targets is strongly reduced during detached plasma operation.This contribution will highlight the experimental results and show the accessible operational space for nitrogen induced detachment in H-Mode. Accompanying SOLPS-modeling of the detachment process will be presented.

    AB - Detached divertor operation in H-Mode is essential for future fusion reactors to be able to handle the occuring power fluxes into the divertor and to avoid major material erosion of the divertor targets. Complete detachment is characterized by a substantial reduction of plasma pressure along a fieldline from midplane to target across the whole Scrape-Off Layer.Complete detachment has only been observed at the inner target in the boronized full-tungsten wall tokamak ASDEX Upgrade so far. Recently, stable H-Mode operation with a completely detached plasma at both divertor targets has been achieved by significant nitrogen seeding. The pressure loss along the field line exceeded a factor of ten and the power flux was effectively reduced to negligible levels at both targets simultaneously. Tungsten sputtering at the targets is strongly reduced during detached plasma operation.This contribution will highlight the experimental results and show the accessible operational space for nitrogen induced detachment in H-Mode. Accompanying SOLPS-modeling of the detachment process will be presented.

    M3 - Conference abstract in proceedings

    BT - DPG-Frühjahrstagung Jena 2013

    ER -

    Reimold F, Bernert M, Kallenbach A, Pozel S, Wischmeier M, Scarabosio A et al. Experimental Results and SOLPS-Modeling of H-Mode Detachment in full-tungsten ASDEX Upgrade. In DPG-Frühjahrstagung Jena 2013. 2013. P6.3