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A hexagon pitch carbon nanotube (CNT) array vertical to
the normal gate of cold cathode field emission displayer (FED) is
simulated by solving the Laplace equation. The calculated results
show that the normal gate causes the electric field around the CNT
tops to be concentrated and emission electron beam become a column.
The field enhancement factor and the emission current intensity step
up greatly compared with those of diode structure. Emission current
density increases rapidly with the decrease of normal-gate aperture.
The gate voltage exerts a critical influence on the emission
current. 相似文献
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虽然物理实验内容和实验装置近年来做过一些改进,但与现代科学技术的迅速发展不相适应,不能调动学生做实验的积极性,不能有效地培养学生的实践能力和创新能力.中国计量学院物理实验中心采用分层次分模块自主灵活实验教学,能够拓展学生的实验技术水平和提高科研能力.在此改革机制下.学生的学习兴趣有了很大的提升,竞赛水平进步明显,创新思... 相似文献
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