| 碳纤维阴极的电子发射机制 |
| |
| 引用本文： | 刘列,李立民,文建春,万红.碳纤维阴极的电子发射机制[J].强激光与粒子束,2005,17(8):1205-1209. |
| |
| 作者姓名： | 刘列 李立民 文建春 万红 |
| |
| 作者单位： | 国防科学技术大学,光电科学与工程学院,湖南,长沙,410073;国防科学技术大学,光电科学与工程学院,湖南,长沙,410073;国防科学技术大学,光电科学与工程学院,湖南,长沙,410073;国防科学技术大学,光电科学与工程学院,湖南,长沙,410073 |
| |
| 基金项目： | Supported by National High-Tech Research and Development Programme |
| |
| 摘 要： | 建立了金属阴极和碳纤维阴极的电子发射机制模型，发射后的阴极和碳纤维阴极的微观照片证实了模型的正确性。实验结果与分析表明：一种优化的阴极应该具备多种电子发射机制，整个阴极的电子发射更均匀，碳纤维阴极的电子发射不仅具有尖端的场发射，而且伴随着侧向的表面闪络(随纹)。此外和金属阴极相比较，处理后碳纤维阴极具有较慢的等离子体膨胀速度(≤1 cm/μs)并使该实验用微波源具有较宽的微波脉冲输出(≥200 ns)。
|
| 关 键 词： | 碳纤维阴极 电子发射机制 微波脉 |
| 文章编号： | 1001-4322(2005)08-1205-05 |
| 收稿时间： | 2005-01-21 |
| 修稿时间： | 2005-07-25 |
Electron emission mechanism of carbon fiber cathode |
| |
| LIU Lie,LI Li-min,WEN Jian-chun,WAN Hong.Electron emission mechanism of carbon fiber cathode[J].High Power Laser and Particle Beams,2005,17(8):1205-1209. |
| |
| Authors: | LIU Lie LI Li-min WEN Jian-chun WAN Hong |
| |
| Institution: | College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China |
| |
| Abstract: | Models of electron emission mechanism are established concerning metal and carbon fiber cathodes. Correctness of the electron emission mechanism was proved according to micro-photos and electron scanning photos of cathodes respectively. The experimental results and analysis show that the surface flashover induces the electron emission of carbon fiber cathode and there are electron emission phenomena from the top of the carbon and also from its side surface. In addition, compared with the ease of the stainless steel cathode, the plasma expansion velocity for the carbon fiber cathode is slower and the pulse duration of output microwave can be widened by using the carbon fiber cathode. |
| |
| Keywords: | Carbon fiber cathode Electron emission mechanism Microwave pulse duration |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《强激光与粒子束》浏览原始摘要信息 |
| 点击此处可从《强激光与粒子束》下载免费的PDF全文 |
|
