An imaging system of pulse-dilation framing camera with a larger drift area is proposed, the magnetic field is calculated and the electronic trajectories is traced, the influence of larger drift area on spatial performance is analyzed, the lager detection area and high spatial resolution of framing camera with larger drift area is discussed. The research results show that the better spatial performance of framing camera with larger drift area is feasibility. When the accelerating energy is 2 keV, the sub-picoseconds pulse-dilation framing camera with Φ90 mm of detection area and 423 μm of spatial resolution is achieved, the femtoseconds ones with Φ40 mm of detection area and 448 μm of spatial resolution is obtained. This work provides a theoretical possibility for achieving higher spatial performance of sub-picoseconds/femtoseconds framing camera with larger drift area.

提出了一种具有较大漂移面积的脉冲膨胀框架摄像机成像系统，计算了磁场并跟踪了电子轨迹，分析了较大漂移面积对空间性能的影响，探测面积较大，空间分辨率高。讨论了具有较大漂移区域的取景照相机。研究结果表明，具有较大漂移面积的取景器具有更好的空间性能是可行的。当加速能量为2 keV时，实现了检测面积为Φ90mm，空间分辨率为423μm的亚皮秒脉冲扩张式成帧相机，检测面积为Φ40mm，空间分辨率为448μm的飞秒。