A 3D CZT hard x-ray polarimeter for a balloon-borne payload

E. Caroli, J. M. Alvarez, N. Auricchio, Carl Budtz-Jørgensen, R. M. Curado da Silva, S. Del Sordo, P. Ferrando, P. Laurent, O. Limousin, J. L. Galvez, C. P. Gloster, M. Hernanz, J. Isern, Irfan Kuvvetli, J. M. Maia, A. Meuris, J. B. Stephen, A. Zappettini

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    Today it is widely recognised that a measurement of the polarization status of cosmic sources high energy emission is a key observational parameter to understand the active production mechanism and its geometry. Therefore new instrumentation operating in the hard X/soft γ rays energy range should be optimized also for this type of measurement. In this framework, we present the concept of a small high-performance spectrometer designed for polarimetry between 100 and 1000 keV suitable as a stratospheric balloon-borne payload dedicated to perform an accurate and reliable measurement of the polarization status of the Crab pulsar, i.e. the polarization level and direction. The detector with 3D spatial resolution is based on a CZT spectrometer in a highly segmented configuration designed to operate as a high performance scattering polarimeter. We discuss different configurations based on recent development results and possible improvements currently under study. Furthermore we describe a possible baseline design of the payload, which can be also seen as a pathfinder for a high performance focal plane detector in new hard X and soft gamma ray focussing telescopes and/or advanced Compton instruments. Finally we present preliminary data from Montecarlo undergoing studies to determine the best trade-off between polarimetric performance and detector design complexity.
    Original languageEnglish
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Volume8443
    Pages (from-to)84434O
    Number of pages9
    ISSN0277-786X
    DOIs
    Publication statusPublished - 2012
    EventSPIE Astronomical Telescopes + Instrumentation 2012 - Amsterdam RAI Convention Center, Amsterdam, Netherlands
    Duration: 1 Jul 20126 Jul 2012
    Conference number: 8443

    Conference

    ConferenceSPIE Astronomical Telescopes + Instrumentation 2012
    Number8443
    LocationAmsterdam RAI Convention Center
    Country/TerritoryNetherlands
    CityAmsterdam
    Period01/07/201206/07/2012

    Keywords

    • Hard x-ray
    • Scattering polarimetry
    • CZT
    • 3D spectrometers
    • Balloon payload

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