SINAPSE: A lightweight deep learning framework for accurate and explainable neutron-$γ$ discrimination
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866910280961753088 |
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| author | Carreau, Thomas Matta, Adrien Syrett, Owen Mauss, Benoît Etasse, David Lenain, Cyril Morfouace, Pierre Taieb, Julien Regnier, David Copp, Patrick Devlin, Matthew Surault, Charlène Surbrook, Jason |
| author_facet | Carreau, Thomas Matta, Adrien Syrett, Owen Mauss, Benoît Etasse, David Lenain, Cyril Morfouace, Pierre Taieb, Julien Regnier, David Copp, Patrick Devlin, Matthew Surault, Charlène Surbrook, Jason |
| contents | Traditionally, neutron-$γ$ discrimination in organic scintillators relies on techniques such as time-of-flight (ToF) selection and pulse-shape discrimination (PSD). However, particle identification through graphical cuts remains challenging in the low-charge regime due to poor signal-to-noise ratios (SNR). In this work, we propose SINAPSE, a lightweight deep learning framework for accurate and explainable neutron-$γ$ discrimination in the low-charge regime. The framework employs a dual-branch architecture that combines a 1-dimensional convolutional autoencoder for waveform denoising with a classifier for particle identification. Random augmentations are applied to high-SNR waveforms to simulate low-charge conditions, enabling robust extrapolation into regimes where conventional PSD labels are unreliable. We show that SINAPSE achieves superior denoising performance compared to conventional digital signal processing techniques, and outputs well-calibrated probabilities, consistent with traditional graphical cuts. Finally, we apply SHAP (SHapley Additive exPlanations) values to show that model decisions are driven by physically meaningful pulse-shape features, confirming consistency with established PSD principles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_13627 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | SINAPSE: A lightweight deep learning framework for accurate and explainable neutron-$γ$ discrimination Carreau, Thomas Matta, Adrien Syrett, Owen Mauss, Benoît Etasse, David Lenain, Cyril Morfouace, Pierre Taieb, Julien Regnier, David Copp, Patrick Devlin, Matthew Surault, Charlène Surbrook, Jason Instrumentation and Detectors Data Analysis, Statistics and Probability Traditionally, neutron-$γ$ discrimination in organic scintillators relies on techniques such as time-of-flight (ToF) selection and pulse-shape discrimination (PSD). However, particle identification through graphical cuts remains challenging in the low-charge regime due to poor signal-to-noise ratios (SNR). In this work, we propose SINAPSE, a lightweight deep learning framework for accurate and explainable neutron-$γ$ discrimination in the low-charge regime. The framework employs a dual-branch architecture that combines a 1-dimensional convolutional autoencoder for waveform denoising with a classifier for particle identification. Random augmentations are applied to high-SNR waveforms to simulate low-charge conditions, enabling robust extrapolation into regimes where conventional PSD labels are unreliable. We show that SINAPSE achieves superior denoising performance compared to conventional digital signal processing techniques, and outputs well-calibrated probabilities, consistent with traditional graphical cuts. Finally, we apply SHAP (SHapley Additive exPlanations) values to show that model decisions are driven by physically meaningful pulse-shape features, confirming consistency with established PSD principles. |
| title | SINAPSE: A lightweight deep learning framework for accurate and explainable neutron-$γ$ discrimination |
| topic | Instrumentation and Detectors Data Analysis, Statistics and Probability |
| url | https://arxiv.org/abs/2605.13627 |