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采用经典公式、平均场理论和脉冲展宽模型研究时间展宽分幅管的物理和技术时间分辨率。分析电子初能、阴极偏置、阴极脉冲斜率和漂移距离等参数对时间分辨率的影响。讨论时间分辨处于皮秒级和亚皮秒级时物理和技术时间分辨所起的作用,并探讨实现亚皮秒级时间分辨的可能性。研究结果表明:物理和技术时间分辨相互制约,当像管时间分辨处于5 ps量级时,技术时间分辨决定像管时间分辨;当像管时间分辨提升到亚皮秒量级时,物理和技术时间分辨处于同量级,像管时间分辨由两者共同决定。
The classical formulas, mean field theory and pulse broadening model are used to study the physical and technical time resolution of time spread widening tubes. The effects of parameters such as initial electron potential, cathode bias, cathodic pulse slope and drift distance on time resolution were analyzed. Discusses time-resolved physical and temporal resolution of time at picosecond and sub-picosecond levels and explores the possibility of sub-picosecond temporal resolution. The results show that the time and resolution of physics and technology are mutually restricted, and the time resolution of image tube determines the image tube time resolution when the image tube time resolution is in the order of 5 ps. When the image tube time resolution is increased to the subpicosecond order, the physics and technology Time-resolved in the same order of magnitude, such as the time-resolved by both the decision.