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Search: WFRF:(van der Graaf H) > (2005-2009)

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1.
  • Campbell, M, et al. (author)
  • Detection of single electrons by means of a Micromegas-covered Medipix2 pixel CMOS readout circuit
  • 2005
  • In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 540:2-3, s. 295-304
  • Journal article (peer-reviewed)abstract
    • A small drift chamber was read out by means of a MediPix2 readout chip as a direct anode. A Micromegas foil was placed above the chip, and electron multiplication occurred in the gap. With a He/isobutane 80/20 mixture, gas multiplication factors up to tens of thousands were achieved, resulting in an efficiency for detecting single electrons of better than 90%. We recorded many frames containing 2D images with tracks from cosmic muons. Along these tracks, electron clusters were observed, as well as δ-rays.
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