Experimental study of the influence of the CdZnTe substrate thickness on the response of infrared HgCdTe photodetectors under proton irradiation

Thibault Pichon*, Olivier Boulade, Salima Mouzali, Patrick Mulet, Simone De Camillis, Charbel Koumeir, Jean Louis Santailler, Giacomo Badano, Olivier Gravrand, Olivier Limousin

*Corresponding author for this work

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

    1 Citation (Scopus)

    Abstract

    Experimental study of the influence of the CdZnTe substrate thickness on the response of IR detectors under irradiation has been performed. Two detectors, with different substrate thickness 800 μm and 50 μm, were submitted to low flux 62 MeV proton irradiation.Images acquired under irradiation were analyzed. Whereas the detector with 800 μm substrate thickness has shown background signal increase under irradiation, the detector with the substrate partially removed has not shown any background signal elevation. The elevation of the background signal under irradiation in the detector with intact substrate is attributed to the large extension of one transient event as reveal by the derivation of one transient event. The results of the irradiation campaign are further compared to simulations. This comparison shows very good agreement and highlights the role of emission of low energy photons inside the substrate which are in turn detected by the light sensitive layer.

    Original languageEnglish
    Title of host publicationX-Ray, Optical, and Infrared Detectors for Astronomy IX
    EditorsAndrew D. Holland, James Beletic
    Place of PublicationBellingham, Washington
    PublisherSPIE
    Pages114540O-1-114540O-15
    Number of pages15
    ISBN (Electronic)9781510636965
    ISBN (Print)9781510636958
    DOIs
    Publication statusPublished - 14 Dec 2020
    EventX-Ray, Optical, and Infrared Detectors for Astronomy IX 2020 - Virtual, Online, United States
    Duration: 14 Dec 202022 Dec 2020

    Publication series

    NameProceedings of SPIE
    PublisherSPIE
    Volume11454
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Conference

    ConferenceX-Ray, Optical, and Infrared Detectors for Astronomy IX 2020
    Country/TerritoryUnited States
    CityVirtual, Online
    Period14/12/2022/12/20

    Keywords

    • CdZnTe
    • HgCdTe
    • Luminescence
    • Radiation effects

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