Počet záznamů: 1

Interpretation of fast measurements of plasma potential, temperature and density in SOL of ASDEX Upgrade

  1. 1.
    0348681 - UFP-V 2011 RIV AT eng J - Článek v odborném periodiku
    Horáček, Jan - Adámek, Jiří - Müller, H. W. - Seidl, J. - Nielsen, A.H. - Rohde, V. - Mehlmann, F. - Ionita, C. - Havlíčková, Eva
    Interpretation of fast measurements of plasma potential, temperature and density in SOL of ASDEX Upgrade.
    Nuclear Fusion. Roč. 50, č. 10 (2010), s. 105001-105001 ISSN 0029-5515
    Grant CEP: GA AV ČR KJB100430901; GA ČR GA202/09/1467; GA MŠk 7G09042
    Výzkumný záměr: CEZ:AV0Z20430508
    Klíčová slova: Ball-pen probe * Langmuir probe * tokamak * plasma * SOL * turbulence * blob * interchange instability * ASDEX Upgrade
    Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
    Impakt faktor: 3.303, rok: 2010
    http://iopscience.iop.org/0029-5515/50/10/105001

    This paper focuses on interpretation of fast (1μs) and local (2–4 mm) measurements of plasma density, potential and electron temperature in the edge plasma of tokamak ASDEX Upgrade. Steady-state radial profiles demonstrate the credibility of the ball-pen probe. We demonstrate that floating potential fluctuations measured by a Langmuir probe are dominated by plasma electron temperature rather than potential. Spatial and temporal scales are found consistent with expectations based on interchange-driven turbulence. Conditionally averaged signals found for both potential and density are also consistent; however, those for temperature show an unexpected ~4mm wide decrease by 10% at the very centre of a blob. In the wall shadow, temperature measured by the swept Langmuir probe yields values ~10 eV, whilst the ball-pen temperature gradient is more steep and credible, dropping down to ~1 eV.
    Trvalý link: http://hdl.handle.net/11104/0189132