短磁聚焦分幅变像管空间分辨率的模拟与测试
白雁力1,2, 龙井华3,蔡厚智1,雷云飞1,张又文1,李仕潭1,刘进元1

1)深圳大学光电子器件与系统教育部重点实验室,广东省光电子器件与系统教育部重点实验室,深圳 518060; 2)桂林电子科技大学教学实践部,广西桂林 541004; 3)深圳大学物理科学与技术学院,深圳 518060

超快诊断技术; 分幅变像管; 短磁聚焦; 空间分辨率; 微通道板; 洛伦兹软件

Simulated and measured spatial resolution of framing converter using short magnetic focusing
Bai Yanli1, 2, Long Jinghua3, Cai Houzhi1, Lei Yunfei1, Zhang Youwen1, Li Shitan1, and Liu Jinyuan1

Bai Yanli1, 2, Long Jinghua3, Cai Houzhi1, Lei Yunfei1, Zhang Youwen1, Li Shitan1, and Liu Jinyuan11)Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, Key Laboratory of Optoeleetronic Devices and Systems of Guangdong Province, Shenzhen University, Shenzhen 518060, P.R.China2)Department of Education Practice, Guilin University of Electronic Technology, Guilin 541004, Guangxi Province, P.R.China3)College of Physics Science and Technology, Shenzhen University, Shenzhen 518060, P.R.China

ultrafast diagnostic technique; framing converter; short magnetic focusing; spatial resolution; micro channel plate; Lorenz 3D-EM

DOI: 10.3724/SP.J.1249.2015.02178

备注

模拟和设计短磁聚焦分幅变像管,研究变像管空间分辨特性及其影响因素.采用洛伦兹软件Lorentz 3D-EM建立变像管模型,通过分析变像管磁场和模拟电子成像,估算变像管阴极中心空间分辨率为～16.61 lp/mm(阴极电压-3.0 kV). 模拟阴极上不同离轴点、变像管不同成像倍率和不同阴极电压3种情况对变像管空间分辨率的影响. 通过设计变像管,构建实验平台,测试变像管空间分辨率,在阴极电压为-3.0 kV时,测试结果为 ～13 lp/mm.

The characteristic and influencing factors of spatial resolution of a framing converter with short magnetic focusing were studied. The model of the framing converter was built by Lorenz 3D-EM software. The calculated spatial resolution is about 16.61 lp/mm(cathode voltage at -3.0 kV)by analyzed magnetic field and simulated electron imaging. The influencing factors of spatial resolution were also simulated, which are on different off-axis points of cathode, with different imaging magnification and at different cathode voltages. The spatial resolution was measured through designing experimental system and the result is about 13 lp/mm when cathode voltage at -3.0 kV.

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