A UV sensitive integrated micromegas with timepix readout

Joost Melai, Amos Breskin, Marco Cortesi, Yevgen Bilevych, Martin Fransen, Harry van der Graaf, Jan Visschers, Victor Blanco Carballo, Cora Salm, Jurriaan Schmitz

    Research output: Contribution to journalArticleAcademicpeer-review

    5 Citations (Scopus)


    This article presents a detector system consisting of three components, a CMOS imaging array, a gaseous-detector structure with a Micromegas layout, and a UV-photon sensitive CsI reflective photocathode. All three elements have been monolithically integrated using simple post-processing steps. The Micromegas structure and the CMOS imaging chip are not impacted by the CsI deposition. The detector operated reliably in He/isobutene mixtures and attained charge gains with single photons up to a level of 6x104. The Timepix CMOS array permitted high resolution imaging of single UV-photons. The system has an MTF50 of 0.4lp/pixel which corresponds to approximately 7lp/mm.
    Original languageEnglish
    Pages (from-to)133-137
    Number of pages5
    JournalNuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
    Publication statusPublished - 6 Jul 2010


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


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