Detection of low-energy charged particles by channel electron multipliers. (1st November 2022)

• Record Type: Journal Article
• Authors: Newson, D.M.; Shipman, M.; Brawley, S.J.; Kadokura, R.; Babij, T.J.; Cooke, D.; Leslie, D.E.; Laricchia, G.
• Is Part Of: Journal of instrumentation. Volume 17:Number 11(2022)
• Publication Date: 2022-11-01
• Subjects: Analysis and statistical methods -- Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc) -- Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc) -- Electron multipliers (vacuum); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/17/11/P11026
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: Experimental determinations of the detection efficiency for positrons impacting a channel electron multiplier with incident energies between 0–1400 eV are presented. A log-normal dependence with energy is established and used to compute the positron-to-positronium detection efficiency ratio as a function of positronium energy, as required for determining quantities involving the ratio of positron and positronium rates. A log-normal energy-dependence is also observed in results of previous work with electrons, protons and ions.