Avalanche photodiode arrays enable large-area measurements of medium-energy electrons

Keiichi Ogasawara, Stefano Livi, Maher A. Dayeh, Frederic Allegrini, Mihir I. Desai, David J. McComas

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We demonstrate the performance of a large-area avalanche photodiode array as a medium-energy electron detector. This avalanche photodiode array is composed of eight pixels with 1.2 cm2 of total active area. The energy resolution (Δ E/E) is as low as 4.5% in full width at half maximum for 25-keV electrons, and the linearity is excellent. Monte Carlo modeling by Geant4 shows that the detection efficiency of this device is appropriate for the detection of electrons ranging from <5 to > 200 keV. This new device can be coupled with magnetic deflectors, electrostatic analyzers, and other physics instruments requiring position-sensitive or large-area solutions for the detection of electrons in this energy range.

Original languageEnglish (US)
Article number5204743
Pages (from-to)2533-2537
Number of pages5
JournalIEEE Transactions on Nuclear Science
Issue number4
StatePublished - Aug 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering


  • Avalanche photodiodes
  • Electron detectors
  • Solid-state detectors
  • Space instrumentation


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