Here we present the thermal neutron counter from the ELI Gamma Above Neutron Threshold setup at the Extreme Light Infrastructure - Nuclear Physics. We describe the mechanical design of the setup, the properties of the 3He gas counters, and the hardware data-acquisition electronics and software digital signal processing. The performance of the complete detector array is demonstrated via Geant4 and MCNP simulations, and measurements with typical neutron sources. The analysis procedure for experimental measurements are outlined with a in-beam test experiment with an α beam to measure the 13C(α,n0)16O cross-section branching ratios.
@article{arxiv.2510.00042,
title = {ELIGANT-TN -- ELI Gamma Above Neutron Threshold: The Thermal Neutron setup},
author = {P. -A. Söderström and D. L. Balabanski and M. Cuciuc and D. M. Filipescu and I. Gheorghe and A. Kuşoğlu and C. Matei and D. Testov and S. Aogaki and H. T. Aslani and L. Capponi and D. Choudhury and G. Ciocan and T. Glodariu and M. Krzysiek and V. Lelasseux and R. Roy and R. F. Andrei and M. Brezeanu and R. Corbu and A. Dhal and D. Iancu and D. Kahl and S. Ioannidis and K. KeunHwan and G. Lorusso and B. Mauyey and T. Petruse and G. V. Turturică},
journal= {arXiv preprint arXiv:2510.00042},
year = {2025}
}