A. I. Saifutdinov, N. P. Germanov, A. R. Sorokina, A. A. Saifutdinova
{"title":"Numerical Analysis of the Influence of Evaporation of the High- and Low-Melting-Point Anode Materials on Parameters of a Microarc Discharge","authors":"A. I. Saifutdinov, N. P. Germanov, A. R. Sorokina, A. A. Saifutdinova","doi":"10.1134/S1063780X23601104","DOIUrl":null,"url":null,"abstract":"<p>We present the results of numerical studies of the influence of evaporation of anode material on the main characteristics of an arc discharge. Calculations were carried out for an arc discharge in helium as a buffer gas with high-melting-point (using graphite as an example) and low-melting-point (using copper as an example) anodes. The dependences of the main arc-discharge parameters on current density are presented. It is demonstrated that intense evaporation of particles of the anode material into the discharge gap occurs upon reaching the melting point of the anode surface. As a result, the plasma-forming ion is replaced, i.e., the carbon ion in the case of the graphite anode or a copper ion in the case of the copper anode becomes dominant. In the process, a jump in the potential is observed in the dependence of voltage on current density (the volt–ampere characteristic, VAC). Distribution of the main plasma parameters along the discharge gap is presented for different points in the VAC.</p>","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2023-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasma Physics Reports","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063780X23601104","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, FLUIDS & PLASMAS","Score":null,"Total":0}
引用次数: 0
Abstract
We present the results of numerical studies of the influence of evaporation of anode material on the main characteristics of an arc discharge. Calculations were carried out for an arc discharge in helium as a buffer gas with high-melting-point (using graphite as an example) and low-melting-point (using copper as an example) anodes. The dependences of the main arc-discharge parameters on current density are presented. It is demonstrated that intense evaporation of particles of the anode material into the discharge gap occurs upon reaching the melting point of the anode surface. As a result, the plasma-forming ion is replaced, i.e., the carbon ion in the case of the graphite anode or a copper ion in the case of the copper anode becomes dominant. In the process, a jump in the potential is observed in the dependence of voltage on current density (the volt–ampere characteristic, VAC). Distribution of the main plasma parameters along the discharge gap is presented for different points in the VAC.
期刊介绍:
Plasma Physics Reports is a peer reviewed journal devoted to plasma physics. The journal covers the following topics: high-temperature plasma physics related to the problem of controlled nuclear fusion based on magnetic and inertial confinement; physics of cosmic plasma, including magnetosphere plasma, sun and stellar plasma, etc.; gas discharge plasma and plasma generated by laser and particle beams. The journal also publishes papers on such related topics as plasma electronics, generation of radiation in plasma, and plasma diagnostics. As well as other original communications, the journal publishes topical reviews and conference proceedings.