Fig. 1. Schematic diagram of CCD dynamic range measurement

Fig. 2. Energy-gray curve of the CCD

Fig. 3. Schematic diagram of multi-beam laser bunching test

Fig. 4. Image of multi-beam laser bunching and energy concentration distribution

Fig. 5. Time profiles of four laser beams

Fig. 6. “Zero synchronization difference” image of two beams reaching the target

Fig. 7. Image captured by the streak camera and the relation between gain coefficient and intensity gray

Fig. 8. Relation between slit width and relative intensity gray

Fig. 9. Dynamic evolution images of the focal spot

Fig. 10. Pulse time profiles at each point of the beam’s focal spot