Počet záznamů: 1  

First simultaneous measurements of Reynolds stress with ball-pen and Langmuir probes

  1. 1. 0476139 - UFP-V 2018 RIV US eng J - Článek v odborném periodiku
    Grover, Ondřej - Adámek, Jiří - Seidl, Jakub - Devitre, A. - Šos, Miroslav - Vondráček, Petr - Bílková, Petra - Hron, Martin
    First simultaneous measurements of Reynolds stress with ball-pen and Langmuir probes.
    Review of Scientific Instruments. Roč. 88, č. 6 (2017), č. článku 063501. ISSN 0034-6748
    Grant CEP: GA ČR(CZ) GA15-10723S; GA ČR(CZ) GA16-25074S; GA MŠk(CZ) LM2015045
    Institucionální podpora: RVO:61389021
    Klíčová slova: COMPASS tokamak * Electric field effects * Electric fields * Langmuir probes * Magnetoplasma * Ball-pen probes
    Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
    Obor OECD: 2.11 Other engineering and technologies
    Impakt faktor: 1.428, rok: 2017
    http://aip.scitation.org/doi/full/10.1063/1.4984240

    A new multi-pin probe head was installed and tested at the COMPASS tokamak. The probe head consists of several ball-pen and Langmuir probes in similar geometric configurations, which enables fast, simultaneous measurements of the radial and poloidal electric field components from differences of plasma or floating potentials using appropriately positioned ball-pen or Langmuir probes, respectively. The fast measurements of the radial electric field are compared with other methods
    of measuring selected frequency components of the radial electric field. The radial profiles of the Reynolds stress calculated from correlations of electric field fluctuations obtained by either probe type are compared along with their spectral composition. Lower Reynolds stress values are found for Langmuir probes in comparison to ball-pen probes due to negative contributions from higher frequency fluctuations possibly associated with electron temperature fluctuations.
    Trvalý link: http://hdl.handle.net/11104/0272671