作　　者： ; ; (蔡厚智）; (雷云飞）; (张又文）; (李仕潭）; (刘进元）;

机构地区： 教育部

出　　处： 《深圳大学学报（理工版）》 2015年第2期178-182,共5页

摘　　要： 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 3 D-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.

关 键 词： 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

领　　域： [电子电信] [理学] [理学]