The detection of single electrons using a Microgas gas amplification and a MediPix2 CMOS pixel readout

A. Forniani, M. Campbell, M.A. Chefdeville, P. Colas, A.P. Colijn, H. van der Graaf, Y. Giomataris, E.H.M. Heijne, P. Kluit, X. Llopart, Jurriaan Schmitz, J. Timmermans, J. Timmermans, J.L. Visschers

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    4 Citations (Scopus)


    By placing a Micromegas gas gain grid on top of a CMOS pixel readout circuit (MediPix2), we developed a device which acts as a pixel-segmented direct anode in gas-filled detectors. With a He/Isobutane 80/20 mixture (capable of achieving gas gain factors up to 20×103) and employing a drift length of 15 mm, signals from radioactive sources and cosmic radiation were measured. Single primary electrons originating from the passage of cosmic muons through the gas volume were detected with an efficiency higher than 90%.
    Original languageUndefined
    Article number10.1016/j.nima.2005.03.029
    Pages (from-to)270-273
    Number of pages4
    JournalNuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
    Issue number1-2
    Publication statusPublished - 7 Apr 2005


    • Pixel
    • Pixel segmented anode
    • EWI-15498
    • METIS-224510
    • IR-67704
    • MediPix2

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