Fig. 1. Screenshot of program interface

Fig. 2. Flow chart of program

Fig. 3. Diagram of pulse signal waveform and integration interval selection

Fig. 4. Charge integral spectrum

Fig. 5. Charge integral spectrum and fitting analysis

Fig. 6. Post-pulse test and analysis

Fig. 7. Leading-edge time analysis and goodness of fitting

Fig. 8. Physical drawing and schematic diagram of testing device

Fig. 9. Comparison of measurement results for PMT by oscilloscope and QDC

Fig. 10. Post-pulse time and charge distribution

Fig. 11. Dark noise and post-pulse waveform

Fig. 12. Relationship between post-pulse rate and threshold

Fig. 13. Leading-edge time distribution

Fig. 14. Baseline deduction discussion