Fig. 1. Cylinder cavity model of photoelectrons emitted from top surface

Fig. 2. Electric field waveforms in different section

Fig. 3. Distribution of electrons at several times

Fig. 4. Waveform of emitting current and absorbing current

Fig. 5. Distribution of electric field in plane of z=22.5 cm and on line of z=22.5 cm，y=0 (t=24 ns)

Fig. 6. Waveform of electric field at point of x=7.4 cm, y=0, z=2.3 cm

Fig. 7. Distribution of magnetic field in plane of z=0.1 cm and on line of z =0.1 cm，y=0，t=24 ns

Fig. 8. Distribution of magnetic field in plane of y=0 and on line of y=0，x=7.4 cm，t=24 ns

Fig. 9. Waveform of magnetic field at point of x=7.4 cm, y=0, z=0.1 cm

Fig. 10. Simulation results for different X-ray fluences of 10，100，1000 J/m²

Fig. 10. [in Chinese]