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应用于惯性约束核聚变和非扫描式激光雷达等的条纹变像管要求具有较大的探测面积,条纹变像管的探测面积越大,其时间畸变就越大,从而影响条纹相机的探测精度,且会导致荧光屏上成像畸变.本文计算了条纹变像管内部的电场分布,并追踪电子运行轨迹,对条纹变像管的时间畸变进行了分析.结果表明:造成条纹变像管时间畸变较大的区域是阴极到偏转板前的部分;其主要影响因素是阴极曲率半径,且阴极曲率半径存在一个最佳值使得条纹变像管的时间畸变最小,大于该最佳值,条纹变像管会产生正的时间畸变,反之,条纹变像管会产生负的时间畸变;时间畸变的绝对值随着光电子从阴极发射的初始高度的增大而增大;光电子初始能量对条纹变像管的时间畸变的影响很小.同时,模拟了不同阴极曲率半径下由于时间畸变不同导致的动态扫描狭缝像的弯曲情况,时间畸变越小,狭缝像弯曲程度越小.
Fringe tubes used in inertial confinement fusion and non-scanning laser radar require a large detection area. The larger the detection area of the striped tube, the greater the time distortion, which affects the detection accuracy of the stripe camera , And will cause the imaging distortion on the screen.This paper calculates the electric field distribution inside the striped tube and traces the trajectory of the electron and analyzes the time distortion of the striped tube.Results show that the time distortion of the striped tube is The large area is the cathode to the front of the deflection plate; its main influence factor is the radius of curvature of the cathode, and there is an optimum value for the radius of curvature of the cathode such that the time distortion of the tube becomes the minimum. Above this optimum, The positive transition of the photoelectron increases with the increase of the initial height of the photoelectron emission from the cathode; the initial energy of the photoelectron has a significant effect on the time of the bar change tube The effect of distortion is very small.At the same time, the bending of dynamic scanning slit image caused by different time distortion under different cathode curvature radii is simulated, the time distortion Small, slit-like smaller degree of bending.