Experimental study of the rotation characteristics of magnetically driven vacuum-arc cathode spots
文献类型：期刊论文
| 作者 | Liu, YuXi1; Geng JY(耿金越)3; Wang, HaiXing1; Yan, Hao2; Liu, XuHui2; Sun, SuRong1; Liu, Aowei1; Wu, Tao1 |
| 刊名 | PHYSICAL REVIEW E
 |
| 出版日期 | 2025-07-30 |
| 卷号 | 112期号:1页码:15 |
| ISSN号 | 2470-0045 |
| DOI | 10.1103/cnft-5pyh |
| 通讯作者 | Geng, Jin-Yue(gengjy@imech.ac.cn) ; Wang, Hai-Xing(whx@buaa.edu.cn) |
| 英文摘要 | Achieving uniform, stable, and reliable erosion of electrode materials is crucial for enhancing the performance and lifespan of vacuum-arc devices. This study investigates the rotation and erosion characteristics of cathode spots on Cu and Ti cathodes with various applied magnetic fields. The results indicate that with the discharge current changes, cathode spots evolve from a single spot to multiple spots and then back to a single spot. Without an applied magnetic field, Ti cathode spots exhibit a large-scale random walk, while Cu cathode spots show a concentrated distribution. With an applied magnetic field, cathode spots of both materials undergo directional rotation. The velocity of the Ti cathode spots is higher than that of Cu, and spot velocity increases with the increase of magnetic flux density. When the radial magnetic field is enhanced to 70 mT, the rotational velocity of the cathode spots actually decreases with the increase of the peak current. The increase of applied magnetic field leads to a significant decrease in the total erosion rate and macroparticle loss, accompanied by an increase in the average ion charge state. The application of an applied magnetic field can effectively regulate the rotation of cathode spots, allowing both Cu and Ti cathode spots to rotate for more than one full circle. Scanning electron microscopy observations indicate that the dimensions of the erosion craters on the cathode surfaces are significantly reduced, leading to a substantial improvement in the uniformity of erosion. |
| 分类号 | 二类/Q1 |
| WOS关键词 | FELDBOGENTHEORIE BEI KALTEN ; CURRENT-DENSITY ; DYNAMICS ; MOTION ; ELEMENTS |
| 资助项目 | National Natural Science Foundation of China[12175011] ; National Natural Science Foundation of China[11702021] ; National Natural Science Foundation of China[12275019] ; Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology[LabASP-2022-07] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001541483800001 |
| 资助机构 | National Natural Science Foundation of China ; Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology |
| 其他责任者 | 耿金越，Wang HaiXing |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/102223]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China; 2.Beijing Inst Control Engn, Beijing 100094, Peoples R China 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liu, YuXi,Geng JY,Wang, HaiXing,et al. Experimental study of the rotation characteristics of magnetically driven vacuum-arc cathode spots[J]. PHYSICAL REVIEW E,2025,112(1):15. |
| APA | Liu, YuXi.,耿金越.,Wang, HaiXing.,Yan, Hao.,Liu, XuHui.,...&Wu, Tao.(2025).Experimental study of the rotation characteristics of magnetically driven vacuum-arc cathode spots.PHYSICAL REVIEW E,112(1),15. |
| MLA | Liu, YuXi,et al."Experimental study of the rotation characteristics of magnetically driven vacuum-arc cathode spots".PHYSICAL REVIEW E 112.1(2025):15. |
入库方式： OAI收割
来源：力学研究所
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