Počet záznamů: 1  

Characterisation of electron cyclotron wall conditioning plasma in ASDEX Upgrade

  1. 1.
    SYSNO ASEP0572767
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevCharacterisation of electron cyclotron wall conditioning plasma in ASDEX Upgrade
    Tvůrce(i) Wauters, T. (FR)
    Buermans, J. (BE)
    Cavalier, Jordan (UFP-V) RID, ORCID
    Huett, E. (CH)
    Ragona, R. (DK)
    Svoboda, Jakub (UFP-V)
    Bobkov, V. (DE)
    Griener, M. (DE)
    Jacobsen, A. S. (DK)
    Kallenbach, A. (DE)
    Likonen, J. (FI)
    Loarer, T. (FR)
    Lunt, T. (DE)
    Nielsen, S.K. (DK)
    Pitts, R.A. (FR)
    Ricci, D. (IT)
    Rohde, V. (DE)
    Stober, J. (DE)
    Schneider, P. (DE)
    Usoltseva, M. (RU)
    Celkový počet autorů20
    Číslo článku066018
    Zdroj.dok.Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
    Roč. 63, č. 6 (2023)
    Poč.str.11 s.
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovaecrh ; ecwc ; iter ; wall conditioning
    Vědní obor RIVBL - Fyzika plazmatu a výboje v plynech
    Obor OECDFluids and plasma physics (including surface physics)
    CEP9D22001 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
    Způsob publikováníOpen access
    Institucionální podporaUFP-V - RVO:61389021
    UT WOS000970782800001
    EID SCOPUS85152926922
    DOI10.1088/1741-4326/acc674
    AnotaceElectron cyclotron wall condition (ECWC) discharges are characterised in ASDEX Upgrade with full tungsten plasma facing components and X2 polarised waves launched from the equatorial ports, relevant to ECWC conditions in ITER Pre-Fusion Power Operation phase 1. The characterisation of the deuterium plasmas is based on experimental inputs such as electron density measurements, in-vessel pressure measurements, poloidal field maps obtained from the measured coil currents, as well as advanced tomographic methods on camera images filtered at the hydrogen Balmer lines. TOMATOR-1D simulations and collective Thomson scattering radiometer spectra complement the findings. The cold, high density and partially ionized toroidal plasmas show significant levels of stray radiation. The measured radiation includes waves at half of the gyrotron frequency suggesting the occurrence of parametric decay instabilities at 2nd harmonic upper hybrid resonance that locates at the low field side of the resonance. A displacement of the plasma emission along the resonance layer is observed at higher discharge power in discharges with a vertical poloidal magnetic field only. By optimizing the poloidal field pattern, along with the location of the electron cyclotron heating (ECH) resonance, the strongest surface interaction regions for the charged particles can be controlled. Directing plasma flux to inner wall surfaces, and same for the inner divertor apron, is found less effective in ASDEX Upgrade due to magnetic mirror effects and outward convective flows. Modeling however predicts the presence of an intense and uniform flux of low energy atoms produced at the ECH absorption layer that may be effective for conditioning the high field side surfaces after use of the disruption mitigation system.
    PracovištěÚstav fyziky plazmatu
    KontaktVladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
    Rok sběru2024
    Elektronická adresahttps://iopscience.iop.org/article/10.1088/1741-4326/acc674
Počet záznamů: 1  

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