1. The prepulse phenomena in the discharge process of accelerator are analyzed in this paper.

2. The prepulse will result in forming plasma, and further affect the diode performance. To remove or reduce this effect, a crowbar tube with cold cathode was adopted in the accelerator.

3. Prepulse inhibition phenomena suggest that the principle of time priority encoding and time weighting encoding is followed in brain information processing.

4. The splitting was still observed when the prepulse alone was defocused.

5. With prepulse and double-target-coupling techniques, saturation X-ray laser output will be achieved.

6. The pulse generation unit is divided into a prepulse generation unit and a post pulse generation unit.

7. The configuration and simulation model of water pulse forming line switch with prepulse suppression ground plane (PPS) were introduced in this paper.