An integrated micromegas UV-photon detector

Joost Melai, Alexey Lyashenko, Amos Breskin, Harry van der Graaf, Jan Timmermans, Jan Visschers, Cora Salm, Jurriaan Schmitz

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    2 Citations (Scopus)
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    Preliminary results of a photon detector combining a Micromegas-like multiplier coated with a UV-sensitive CsI photocathode are described. The multiplier is made in a CMOS compatible InGrid technology, which allows to postprocess it directly on the surface of an imaging IC. This method is aimed at building light-sensitive imaging detectors where all elements are monolithically integrated. We show that the CsI photocathode deposited in the InGrid mesh does not alter the device performance. Maximum gains of 6000 were reached in a single-grid element operated in Ar/CH4, with a 2% ion backflow fraction returning to the photocathode.
    Original languageEnglish
    Pages (from-to)194-197
    Number of pages4
    JournalNuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
    Publication statusPublished - 8 Jul 2010


    • SC-RID: Radiation Imaging detectors
    • CsI photocathode
    • Gaseous radiation detector
    • CMOS post-processing
    • UV photon detection


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