Single-electron avalanche distributions in gaseous multipliers affect their efficient detection and that of single UV-photons. In this work, we investigated the shape of single-photo-electron spectra in single- and double-stage Resistive Plate WELL (RPWELL) detector configurations, operated in Ne/CH4 and Ar/CH4. Discharge-free operation was reached over a broad dynamic range, with charge gains of \numrange[range-phrase = -]{e4}{e6}. Compared to the usual exponential ones, the observed Polya-like charge spectra pave the way towards higher single-electrons detection efficiencies. The latter were evaluated here, using experimental data combined with numerical simulations. The effects of the gas mixtures, electric field configuration and detector geometry on the Polya spectra and their related "θ" parameter are presented.
Cite
@article{arxiv.2101.01534,
title = {Single Electron Spectra in RPWELL-based detectors},
author = {Purba Bhattacharya and Andrea Tesi and Dan Shaked-Renous and Luca Moleri and Amos Breskin and Shikma Bressler},
journal= {arXiv preprint arXiv:2101.01534},
year = {2021}
}