Fig. 1. Schematic diagram of different electrode structures in WSA anode

Fig. 2. Signal transmission model of readout circuit and waveform diagram

Fig. 3. Effects of integral capacitance and shaping orders on quasi-Gaussian pulse peak

Fig. 4. Effects of shaping time${\tau }_i$ and shaping order n on peak phase of quasi-Gaussian pulse output in readout circuit

Fig. 5. Detector image distortion caused by unequal gain of three readout circuits

Fig. 6. Detector image distortion under conditions of gain of two channels of readout circuit is equal, and gain of the third channel is not equal to the other two channels

Fig. 7. Schematic diagram of charge injection

Fig. 8. Schematic diagram of gain calibration scheme of detector readout circuit

Fig. 9. Decoded diagram of electron cloud centroid coordinates at different locations after gain calibration compensation of readout circuit

Fig. 10. Distorted image when gain of detector readout circuit is not equal

Fig. 11. Normal image after gain compensation