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arxiv: 2107.05496 · v1 · pith:2FZVKO3Anew · submitted 2021-07-12 · 🌌 astro-ph.IM · astro-ph.HE· physics.ins-det

Design, Construction, and Test of the Gas Pixel Detectors for the IXPE Mission

L. Baldini , M. Barbanera , R. Bellazzini , R. Bonino , F. Borotto , A. Brez , C. Caporale , C. Cardelli
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S. Castellano M. Ceccanti S. Citraro N. Di Lalla L. Latronico L. Lucchesi C. Magazz\`u G. Magazz\`u S. Maldera A. Manfreda M. Marengo A. Marrocchesi P. Mereu M. Minuti F. Mosti H. Nasimi A. Nuti C. Oppedisano L. Orsini M. Pesce-Rollins M. Pinchera A. Profeti C. Sgr\`o G. Spandre M. Tardiola D. Zanetti F. Amici H. Andersson P. Attin\`a M. Bachetti W. Baumgartner D. Brienza R. Carpentiero M. Castronuovo L. Cavalli E. Cavazzuti M. Centrone E. Costa E. D'Alba F. D'Amico E. Del Monte S. Di Cosimo A. Di Marco G. Di Persio I. Donnarumma Y. Evangelista S. Fabiani R. Ferrazzoli T. Kitaguchi F. La Monaca C. Lefevre P. Loffredo P. Lorenzi E. Mangraviti G. Matt T. Meilahti A. Morbidini F. Muleri T. Nakano B. Negri S. Nenonen S. L. O'Dell M. Perri R. Piazzolla S. Pieraccini M. Pilia S. Puccetti B. D. Ramsey J. Rankin A. Ratheesh A. Rubini F. Santoli P. Sarra E. Scalise A. Sciortino P. Soffitta T. Tamagawa A. F. Tennant A. Tobia A. Trois K. Uchiyama M. Vimercati M. C. Weisskopf F. Xie F. Zanetti Y. Zhou
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classification 🌌 astro-ph.IM astro-ph.HEphysics.ins-det
keywords detectorsixpeshalldesignexplorerimagingmissionperformance
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Due to be launched in late 2021, the Imaging X-Ray Polarimetry Explorer (IXPE) is a NASA Small Explorer mission designed to perform polarization measurements in the 2-8 keV band, complemented with imaging, spectroscopy and timing capabilities. At the heart of the focal plane is a set of three polarization-sensitive Gas Pixel Detectors (GPD), each based on a custom ASIC acting as a charge-collecting anode. In this paper we shall review the design, manufacturing, and test of the IXPE focal-plane detectors, with particular emphasis on the connection between the science drivers, the performance metrics and the operational aspects. We shall present a thorough characterization of the GPDs in terms of effective noise, trigger efficiency, dead time, uniformity of response, and spectral and polarimetric performance. In addition, we shall discuss in detail a number of instrumental effects that are relevant for high-level science analysis -- particularly as far as the response to unpolarized radiation and the stability in time are concerned.

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    astro-ph.HE 2026-04 accept novelty 2.0

    A user-oriented guide that collects best practices, data formats, and analysis strategies for extracting polarimetric information from IXPE observations.