Charge protection characterisation and drift time resolution improvement for GridPix

W.J.C. Koppert, M. Fransen, N. van Bakel, H. van der Graaf, F. Hartjes, J. Timmermans, J. Visser, R. Kluit, V. Gromov, F. Zappon, V.M. Blanco Carballo, Jurriaan Schmitz, Y. Bilevych, Y. Bilevych

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)


    A GridPix detector is a gaseous detector capable of detecting single primary electrons from ionising particles. Such a detector consists of a pixel chip as active anode covered with a thin layer of silicon rich silicon nitride (SiRN) for protection against discharges. A layer of 8 JlIl1 SiRN, and according recent tests even 4 JlIl1, is sufficient to protect against discharges. The effect of the thickness of the SiRN layer on the operation of a detector has been determined. Time walk effects due to pixel electronics response time and gas gain statistics cause errors in drift time measurements thereby worsening the resolution in the drift direction. Simulations and measurements have been performed to determine how much time walk can be compensated for. GridPix detectors are high resolution low mass detectors that measures track segments in 3D. Very recently we performed first tests in a 250 Me V proton beam, in order to investigate the application of GridPix in Proton therapy and results are promising.
    Original languageUndefined
    Title of host publicationIEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
    Place of PublicationUSA
    Number of pages4
    ISBN (Print)978-1-4673-0118-3
    Publication statusPublished - 23 Oct 2011
    EventIEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011 - Valencia, Spain
    Duration: 23 Oct 201129 Oct 2011

    Publication series

    ISSN (Print)1082-3654


    ConferenceIEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
    Abbreviated titleNSS/MIC
    Internet address


    • Time walk
    • EWI-22601
    • MPGD
    • METIS-293212
    • Proton Therapy
    • TPC
    • IR-82339
    • GridPix

    Cite this