| 金属表面形貌对真空击穿阈值的影响 |
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| 作者姓名： | 胡祥刚 宋玮 向导 朱晓欣 李小泽 谭维兵 张立刚 沈志远 程攀伦 宁齐 梁旭 |
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| 作者单位： | 1.Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China;2.School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China,1.Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China;2.School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China,Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China,Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China,Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China,Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China,Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China,Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China,Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China and Key Laboratory of High Power Microwave Technology,Northwest Institute of Nuclear Technology,Xi’an Shannxi 710024,China |
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| 摘 要： | 探索提高真空击穿阈值的方法,对脉冲功率技术的发展和应用具有重要意义。在金属表面电子发射理论分析的基础上,采用有限元法计算电极表面电场随二极管电压的变化规律,设计实验系统,并开展实验研究。实验对比钛合金TC4阴极在不同表面粗糙度下真空击穿阈值,实验表明,当阴极表面粗糙度(轮廓最大高度Rz)分别为26.13 m,10.41 m,6.75 m,1.12 m,0.13 m时,击穿阈值分别为306 kV/cm,345 kV/cm,358 kV/cm,392 kV/cm,428 kV/cm。当Rz由26.13 m减小至0.13 m时,击穿阈值提高39%。金属表面击穿阈值随Rz减小而提高,减小金属表面的Rz,是提高真空击穿阈值的有效方法。
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| 关 键 词： | 场致爆炸电子发射 表面粗糙度 真空击穿阈值 |
| 收稿时间： | 2017-11-15 |
| 修稿时间： | 2018-09-25 |
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