Design of carbon nanotube cold cathode electro-optical system with mesh grid structure
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摘要: 基于碳纳米管冷阴极实验测试结果，采用三维粒子模拟软件对大面积碳纳米管冷阴极的场致发射特性进行了仿真，研究了栅网结构不同尺寸对碳纳米管冷阴极场致发射特性及电子注通过率的影响，并在此基础上设计出面积压缩比为18，输出电流密度为14.9 A/cm2的带状注电子枪。为进一步研制碳纳米管冷阴极电子光学系统和相关微波、毫米波电真空辐射源器件提供了技术基础。Abstract: Carbon nanotube (CNT) which has excellent field emission characteristics can be an ideal cathode material for the field emission devices. Based on experimental test results, the field emission properties of large area carbon nanotube cold cathode are investigated using the three dimensional PIC simulation software. The impact on field emission characteristic and the pass rate of electron beam with different dimensions of planar mesh grid structure are studied. On this basis of optimized mesh grid structure, a sheet beam electron gun with carbon nanotube cold cathode is designed, whose compression ratio of area is 18 and the output current density is 14.9 A/cm2.
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Key words:
- carbon nanotube /
- electron gun /
- cold cathode /
- sheet beam
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