High-energy gamma-ray spectroscopy is crucial for studying and advancing the application of high-energy photons in areas like strong-field physics, high-energy-density science, and laboratory astrophysics. However, high-energy gamma-ray spectroscopy in the multi-MeV to GeV range faces significant challenges in precise spectral reconstruction. This study presents a machine learning-based inversion approach that combines a spectrometer design with advanced deconvolution algorithms. We develop a gamma-ray spectrometer optimized through Monte Carlo simulations for maximum positron yield and minimal noise. A two-stage neural network framework is proposed based on the structure of the spectrometer: a denoising autoencoder suppresses statistical noise in measured positron spectra, while a U-Net architecture solves the ill-posed inverse problem to reconstruct incident gamma spectra. This approach establishes a new methodology for gamma-ray diagnostics in strong-field QED experiments and high-energy photon sources.
@article{arxiv.2512.01612,
title = {Neural network-based deconvolution for GeV-Scale Gamma-Ray Spectroscopy},
author = {Zhuofan Zhang and Mingxuan Wei and Kyle Fleck and Jun Liu and Xinjian Tan and Gianluca Sarri and Wenchao Yan},
journal= {arXiv preprint arXiv:2512.01612},
year = {2026}
}