Fig. 1. On site photo (a) and schematic diagram(b) of experimental setup

Fig. 2. Waveforms of neutron and γ signals (color online)

Fig. 3. Flow chart of discrimination algorithm

Fig. 4. Histogram of PSD at different trigger levels (a) -4 mV, (b) -8 mV, (c) -12 mV

Fig. 5. PSD histogram of -8 mV trigger levels at different energy levels (a) 2 500 keV, (b) 5 000 keV

Fig. 6. Schematic diagram of data processing for wavelet scattering network

Fig. 7. Comparison of signals before and after preprocessing (color online)

Fig. 8. Schematic diagram of data processing flow for CNN

Fig. 9. Comparison of accuracy and loss between MNv4 and KAN algorithms (a) Loss curves, (b) Accuracy curves

Fig. 10. Confusion matrix of test results (a) MNv4: Test set 1, (b) KAN: Test set 1, (c) MNv4: Test set 2, (d) KAN: Test set 2

Fig. 11. Schematic diagram of FOM for n/γ discrimination

Fig. 12. PSD histograms of different discrimination methods (a) Charge comparison method, (b) MNv4, (c) KAN

Fig. 13. Waveform signals at 0.1 noise level (color online)

Fig. 14. Waveform signals at (-6, -4] mV triggring level