物理学报2012，Vol.61Issue(21)：343-349,7.
碳纳米管冷阴极脉冲发射特性及仿真模型研究
Study of pulsed field emission characteristics and simulation models of carbon nanotube cold cathodes
摘要
Abstract
For the application requirement of a carbon nanotube clod cathode (CNCC) used in the microwave and millimeter wave electric vacuum radiation source devices, pulsed field emission characteristics of CNCC are experimentally investigated by a 2 μs/20 kV high-voltage modulator in this paper. The pulsed field emission currents for different distances between anode and cathode and those of CNCC after the pulsed high-tension arc has occurred many times are studied. A maximal emission current of 16 mA is tested for CNCC with a 4 mm diameter emission disk, and the emission current density is achieved to be 127 mA/cm2. Based on the experimental results, the field emission simulation model of CNCC is established by PIC simulation software. Simulation results show that this simulation model is suited for describing the experimental results and laying the foundation for the development of CNCC electron optical system and radiation source devices.关键词
碳纳米管/冷阴极/场致发射/仿真模型Key words
carbon nanotubes cold cathode field emission simulation model分类
信息技术与安全科学引用本文复制引用
袁学松,张宇,孙利民,黎晓云,邓少芝,许宁生,鄢扬..碳纳米管冷阴极脉冲发射特性及仿真模型研究[J].物理学报,2012,61(21):343-349,7.基金项目
国家自然科学基金,(批准号： U1134006, 61101041)和中山大学光电材料与技术国家重点实验室开放课题,(批准号： KF2010-ZD-06)资助的课题. （批准号： U1134006, 61101041）
