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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00125185" target="_blank" >RIV/00216224:14310/22:00125185 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-6595/ac3342" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6595/ac3342</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6595/ac3342" target="_blank" >10.1088/1361-6595/ac3342</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plasma Sources Science and Technology

ISSN

0963-0252

e-ISSN

1361-6595

Volume of the periodical

31

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000771195000001

EID of the result in the Scopus database

2-s2.0-85127616112