Informace o publikaci

PIC/MC calculation of current--voltage characteristic of emissive probe

Autoři

JÍLEK Zvonimír ČALOUD Jakub ZIKÁN Petr OBRUSNÍK Adam TRUNEC David

Rok publikování 2022
Druh Článek v odborném periodiku
Časopis / Zdroj Plasma Sources Science and Technology
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://iopscience.iop.org/article/10.1088/1361-6595/ac3342
Doi http://dx.doi.org/10.1088/1361-6595/ac3342
Klíčová slova emissive probe; PIC/MC simulation; probe temperature
Popis 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.

Používáte starou verzi internetového prohlížeče. Doporučujeme aktualizovat Váš prohlížeč na nejnovější verzi.

Další info