Particle-in-cell simulations of Langmuir probes at COMPASS tokamak.

0481895 - ÚFP 2018 RIV FR eng C - Conference Paper (international conference)
Podolník, Aleš - Komm, Michael - Adámek, Jiří - Háček, Pavel - Krbec, Jaroslav - Dejarnac, Renaud - Pánek, Radomír - Gunn, J. P.
Particle-in-cell simulations of Langmuir probes at COMPASS tokamak.
EPS 2017: 44th European Physical Society Conference on Plasma Physics. Vol. 41F. Mulhouse: European Physical Society, 2017 - (Fajardo, M.; Westerhof, E.; Riconda, C.; Melzer, A.; Bret, A.; Dromey, B.), č. článku P1.110. Europhysics Conference Abstracts (ECA). ISBN 979-10-96389-07.
[EPS 2017 Conference on Plasma Physics/44./. Belfast (IE), 26.06.2017-30.06.2017]
R&D Projects: GA ČR(CZ) GA16-14228S; GA MŠMT(CZ) 8D15001; GA MŠMT(CZ) LM2015045
Institutional support: RVO:61389021
Keywords : tokamak * COMPOSS * Langmuir probes
OECD category: Fluids and plasma physics (including surface physics)

Langmuir probes are amongst the most versatile tools for plasma diagnostics for both magnetized and unmagnetized plasmas. Analysis of I–V characteristics measured by the probe can in principle yield values of electron temperature Te, floating potential Vfl and electron density ne as well as electron energy distribution function. However, correct values of these quantities
can be determined only when all the instrumental effects on measured data are addressed. For magnetized plasma in the scrape-off layer of tokamak discharges, the prevalent influence is the sheath expansion due to presence of strong magnetic field. This effect is taken into account by introduction of fourth parameter to fit of the I–V curve [1].
Permanent Link: http://hdl.handle.net/11104/0277353