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Instability of the arc from the cathode material
http://hdl.handle.net/10458/00010477
http://hdl.handle.net/10458/00010477dfc1161d-7b27-4cb4-ae77-f9a9a73e0b16
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
本文 (447.9 kB)
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| Item type | 会議発表論文 / Conference Paper(1) | |||||
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| 公開日 | 2023-02-02 | |||||
| タイトル | ||||||
| タイトル | Instability of the arc from the cathode material | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Vacuum Arc | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Cathode Spot | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Instability | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Plasma | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
| 資源タイプ | conference paper | |||||
| 著者 |
湯地, 敏史
× 湯地, 敏史× Thongtesta, N.× Wadkhian, T.× Mungkung, Narong× Phungraeng, N.× Poonthong, W.× Songruk, A.× Arunrungrusmi, Somchai |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The purpose of this research was to analyze instability phenomena in vacuum arc for silver cathode, characterized by noise on the current trace prior to the actual current chopping. The analyzed instability phenomena were derived from cathode spot model, cathode spot region is recognized as the collision less space charge sheath connected with singly ionized collision plasma. A cathode input voltage eff V You can find out by using the principles of heat transfer. But the current arc I, The temperature change of cathode to anode ΔTc,ΔTa and the voltage input to the arc Va Is used to measure the voltage drop across the cathode e ff V Determinate eff V =Va*( a ΔTc/ΔTa+ΔT ) The 8 dependent variables, cathode spot radius, current density, cathode electric field, electron current fraction, sheath voltage, plasma density, electron temperature of plasma and cathode surface temperature are solved by using 8 equations with two unknown parameters. Two unknown parameters, cathode input power and ion current fraction on anode surface, are eliminated by using experimental data. The instability phenomena are proposed that a current level below that no real solution exists is unstable current and this current corresponds to the point at which a vacuum arc turns into unstable. Minimum arc current having real solutions is restricted by cathode electric field equation. It was found that when the arc current is lower than 16.2 A there is no real solution and that is defined the instability. The physical explanation of instability is considered that the electrons returning to the sheath region from the plasma one dominates over positive ions. Consequently, the stable ion sheath criterion does not satisfy. | |||||
| 言語 | en | |||||
| 書誌情報 |
en : 7th International Conference on INTERNATIONAL CONFERENCE ON SCIENCE, TECHNOLOGY AND EDUCATION ICSTE 2022 p. 22-25, 発行日 2022-09 |
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| 出版者 | ||||||
| 出版者 | International Conference on Science, Technology and Education | |||||
| 言語 | en | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
