Guang-Hui Hao, Ze-Peng Li, Yu-Juan Gao, Ya-Kun Zhou. Effect of surface topography on emission properties of hot-cathode [J]. Acta Physica Sinica, 2019, 68(3): 037901-1
- Acta Physica Sinica
- Vol. 68, Issue 3, 037901-1 (2019)
Fig. 1. Production process of thermal cathode preparation.热阴极制备工艺流程图
Fig. 2. Surface microtopography of cathode with periodic stripe structure: (a) Unidirectionalstripe structure; (b) orthogonal bidirectional stripe structure.周期性条纹结构阴极的表面显微形貌 (a)单向条纹结构; (b)正交双向条纹结构
Fig. 3. Diagram of water-cooled vacuum diode and cathode performance testing system. Symbol 1, 2, 3 and 4 are cathode, glass shell, anode and cooling water connector, respectively.水冷真空二极管结构及阴极性能测试系统示意图(1为阴极, 2为玻壳, 3为阳极, 4为冷却水接口)
Fig. 4. Current density character of cathode sample 1 and 2 with different working temperature.不同工作温度条件下阴极样品1和样品2发射电流密度特性
Fig. 5. Current density character of cathode sample 3 and 4 with different working temperature.不同工作温度条件下阴极样品3和样品4的发射电流密度特性
Fig. 6. Current density character of cathode sample 4 with polar distance 0.1 mm.极间距为0.1 mm时阴极样品4的发射电流密度特性
Fig. 7. Current density character of cathode sample 5 and 6 with different working temperature.不同工作温度条件下阴极样品5和样品6发射电流密度特性
Fig. 8. Emulation model of electron emission performance of cathode with array 3 × 3.3 × 3阵列结构的阴极电子发射性能仿真模型
Fig. 9. Spatial distribution of electrons of longitudinal sections of cathode with array 3 × 3: (a) Cross section of top of tip; (b) cross section of clearance of tips.3 × 3阵列结构的阴极纵向截面处电子的空间分布 (a)微尖尖端位置截面; (b)微尖间隙位置截面
Fig. 10. Electronic distribution of lateral interface that far from the cathode surface about
距阴极表面微尖顶端
位置处横向截面中的电子分布
Fig. 11. Ideal structural model of cathode surface with array 4 × 4.4 × 4阵列结构阴极表面理想结构模型
Fig. 12. Potential distribution of cathode at the tapered micro-tip array structure.锥形微尖阵列结构中阴极电势分布
Fig. 13. Effect of r /h value of micro-tip structure on emission current density of cathode.
微尖结构r /h 值对阴极发射电流密度的影响
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Table 1. Type of cathode and surface structure parameters.
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Table 2. Zero field emission current density of cathode sample 2, 3 and 4.
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