Fig. 1. Cross section of the transition section vacuum chamber of R34OQKicker

Fig. 2. Distribution of shower electrons and photons outside the vacuum chamber

Fig. 3. Two scintillator beam loss monitors in the BEPCII tunnel

Fig. 4. Output of two beam loss monitors for different numbers of bunches running in BEPCII

Fig. 5. Output of two beam loss monitors for injection in BEPCII

Fig. 6. Schematic diagram of the calibration system for the scintillator beam loss monitor

Fig. 7. Comparison of output amplitudes of scintillator beam loss monitors at the same control voltage

Fig. 8. Control voltage corresponding to the output signal of 129 mV for the scintillator beam loss monitor under the same optical input condition

Fig. 9. Comparison of output amplitudes of detectors 21 and 23 during BEPCII running

Fig. 10. Impact of different sampling start points on the integration result