Single-electron spectra in RPWELL-based detectors. (4th May 2021)

• Record Type: Journal Article
• Authors: Bhattacharya, P.; Tesi, A.; Shaked-Renous, D.; Moleri, L.; Breskin, A.; Bressler, S.
• Is Part Of: Journal of instrumentation. Volume 16:Number 5(2021)
• Publication Date: 2021-05-04
• Subjects: Charge transport and multiplication in gas -- Electron multipliers (gas) -- Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc) -- Photon detectors for UV, visible and IR photons (gas) (gas-photocathodes, solid-photocathodes); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/16/05/P05004
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: Single-electron spectra are the key ingredient in the efficient detection of single UV-photons. In this work, we investigated the shape of single-photoelectron 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 [range-phrase = -]e4e6. Compared to the usual exponential ones, the observed Polya-like charge spectra pave the way towards higher single-electron detection efficiencies. The latter was 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.