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@article{1822922,
author = {Jílek, Zvonimír and Čaloud, Jakub and Zikán, Petr and Obrusník, Adam and Trunec, David},
article_number = {3},
doi = {http://dx.doi.org/10.1088/1361-6595/ac3342},
keywords = {emissive probe; PIC/MC simulation; probe temperature},
language = {eng},
issn = {0963-0252},
journal = {Plasma Sources Science and Technology},
title = {PIC/MC calculation of current--voltage characteristic of emissive probe},
url = {https://iopscience.iop.org/article/10.1088/1361-6595/ac3342},
volume = {31},
year = {2022}
}
TY - JOUR
ID - 1822922
AU - Jílek, Zvonimír - Čaloud, Jakub - Zikán, Petr - Obrusník, Adam - Trunec, David
PY - 2022
TI - PIC/MC calculation of current--voltage characteristic of emissive probe
JF - Plasma Sources Science and Technology
VL - 31
IS - 3
SP - 1-10
EP - 1-10
PB - IOP Publishing
SN - 09630252
KW - emissive probe
KW - PIC/MC simulation
KW - probe temperature
UR - https://iopscience.iop.org/article/10.1088/1361-6595/ac3342
N2 - Two numerical models were used to study the functioning of emissive (electron-emitting) probe -- PIC/MC model and thermal model. The PIC/MC model was used for the calculation of I - V characteristics of emissive probe. The calculations were focused on the determination of floating probe potential, which increases with increasing probe temperature. It was found that the floating potential can reach the value of plasma potential, even it can be higher than the plasma potential. The dependence of floating potential on probe temperature is linear in the vicinity of plasma potential, the slope of this dependence changes when the floating potential equals the plasma potential. The potential profiles near the probe were also calculated and it was found that the space charge effects can be neglected for plasma parameters studied (electron density 1014 - 1016 m-3, electron temperature 2500 - 40000 K, probe temperature up to 2 500 K). The thermal model was used for the calculation of the dependence of probe temperature and potential profiles on DC current passing through the probe (and heating the probe). The thermal model was based on heat equation, which was solved using the finite element method. Finally, the results from both above-mentioned models were combined together to obtain the dependencies of floating potential on probe heating DC current.
ER -
JÍLEK, Zvonimír, Jakub ČALOUD, Petr ZIKÁN, Adam OBRUSNÍK a David TRUNEC. PIC/MC calculation of current--voltage characteristic of emissive probe. \textit{Plasma Sources Science and Technology}. IOP Publishing, 2022, roč.~31, č.~3, s.~1-10. ISSN~0963-0252. Dostupné z: https://dx.doi.org/10.1088/1361-6595/ac3342.
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