Publication:
Investigation of the behaviours of cathode spot current density on plasma parameters in low-current vacuum arc

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0

Issued Date

2024-01-01

Resource Type

Article

ISSN

00332097

eISSN

24499544

DOI

10.15199/48.2024.09.39

Scopus ID

2-s2.0-85202534171

Journal Title

Przeglad Elektrotechniczny

Issue

9

Start Page

202

End Page

205

Rights Holder(s)

SCOPUS

Bibliographic Citation

Przeglad Elektrotechniczny No.9 (2024) , 202-205

Suggested Citation

Chanjira P., Jaikhang W. Investigation of the behaviours of cathode spot current density on plasma parameters in low-current vacuum arc. Przeglad Elektrotechniczny No.9 (2024) , 202-205. 205. doi:10.15199/48.2024.09.39 Retrieved from: https://hdl.handle.net/20.500.14740/20511

Title

Investigation of the behaviours of cathode spot current density on plasma parameters in low-current vacuum arc

Author(s)

Chanjira P.
 Jaikhang W.

Author's Affiliation

Chiang Rai Rajabhat University
 Srinakharinwirot University

Corresponding Author(s)

Chanjira P.

Other Contributor(s)

Srinakharinwirot University

Abstract

In order to investigate current density affecting plasma parameters, the cathode spot model is performed. The cathode spot model assumes that the collisionless ion sheath and the singly ionized collisional plasmas are directly connected. It was found that current density increases with decreasing arc current. The dependent variables, cathode temperature, electron current fraction, plasma temperature, sheath voltage, plasma density and cathode electric field increased in accordance with the increase in current. Alternatively, the cathode spot radius is inversely dependent on current density. These plasma parameters are related to T-F emission and thermionic emission process. This cathode spot model of the present analysis which is used to investigate the cathode spot parameter in low-current vacuum arc may be valid for volatile materials.

Keyword(s)

Engineering

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URI

https://hdl.handle.net/20.500.14740/20511

Collections

Scopus: Year 2024

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