| 大电流稳定发射铁电阴极的模拟与实验研究 |
| |
| 引用本文： | 张庆辉,郑曙昕,唐传祥,李泉凤.大电流稳定发射铁电阴极的模拟与实验研究[J].中国物理 C,2006,30(1):71-74. |
| |
| 作者姓名： | 张庆辉 郑曙昕 唐传祥 李泉凤 |
| |
| 作者单位： | 清华大学工程物理系,北京100084 |
| |
| 摘 要： | 讨论了铁电阴极的发射机理, 借助MAFIA对不同电极结构的铁电阴极表面电场分布进行了模拟计算. 计算中发现, 发射面电极结构对铁电阴极表面三界点处的场增强效应影响很大,特别是具有孤岛电极结构的铁电阴极具有更大的三界点场强,从而获得更大和更稳定的发射电流. 通过对电极结构及其工艺的改进,使用PLZT铁电阴极在实验中得到了大于100A的电流.
|
| 关 键 词： | 铁电阴极 孤岛电极 快极化反转 表面等离子体 |
| 收稿时间： | 2005-03-09 |
| 修稿时间： | 2005-03-09 |
Simulation and Experimental Investigations of an Efficient and Stable Ferroelectric Cathode |
| |
| ZHANG Qing-Hui,ZHENG Shu-Xin,TANG Chuan-Xiang,LI Quan-Feng,LI Wen-Jun.Simulation and Experimental Investigations of an Efficient and Stable Ferroelectric Cathode[J].High Energy Physics and Nuclear Physics,2006,30(1):71-74. |
| |
| Authors: | ZHANG Qing-Hui ZHENG Shu-Xin TANG Chuan-Xiang LI Quan-Feng LI Wen-Jun |
| |
| Institution: | Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
| |
| Abstract: | The mechanism of electron emission from ferroelectric cathode is introduced. Distribution of the applied static field in ferroelectric cathodes is simulated by MAFIA codes. It is shown that the structure of front electrode can obviously influence the static field at the triple-point of ferroelectric cathode. A ferroelectric cathode with isolated electrodes can attain stronger multiplicative field at the triple-point, which may be helpful in getting efficient and stable electron emission. In the recent experiments, we have already got stable electron emission over 100A from a PLZTS/65/35 cathode with isolated electrodes. |
| |
| Keywords: | words ferroelectric cathode isolated electrode polarization reversal surface plasma |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《中国物理 C》浏览原始摘要信息 |
| 点击此处可从《中国物理 C》下载免费的PDF全文 |
|
