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Journal of instrumentation, 2021-05, Vol.16 (5), p.P05004
Ort / Verlag
Bristol: IOP Publishing
Erscheinungsjahr
2021
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
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/CH
4
and
Ar/CH
4
. 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.