Fig. 1. Model and imaging performance of magnetic focusing pulse-dilation framing image converter tube. (a) Model; (b) magnetic field distribution of on-axis; (c) three-dimensional electron trajectory; (d) projection of electron trajectory on YZ plane; (e) diffuse spot of object point imaging of on-axis; (f) normalization of Gaussian fitting

Fig. 2. Calculation process of spatial resolution using Rayleigh criterion. (a) Imaging distribution of adjacent object point of on-axis; (b) calculation of spatial resolution

Fig. 3. Imaging of different emission areas. (a) Imaging of the emission area with 1 mm radius; (b) imaging of points under the magnetic field of area with 1 mm radius; (c) imaging of the emission area with 5 mm radius; (d) imaging of points under the magnetic field of area with 5 mm radius

Fig. 4. Analysis of optimal magnetic field. (a) Maximum magnetic fields of on-axis of different imaging areas; (b) comparison of spatial resolution under different magnetic fields