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Design, construction, and test of the Gas Pixel Detectors for the IXPE mission

Journal
Date Issued
2021
Author(s)
Baldini, L.
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Barbanera, M.
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Bellazzini, R.
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Bonino, R.
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Borotto, F.
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Brez, A.
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Caporale, C.
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Cardelli, C.
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Castellano, S.
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Ceccanti, M.
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Citraro, S.
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Di Lalla, N.
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Latronico, L.
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Lucchesi, L.
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Magazzù, C.
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Magazzù, G.
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Maldera, S.
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Manfreda, A.
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Marengo, M.
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Marrocchesi, A.
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Mereu, P.
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Minuti, M.
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Mosti, F.
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Nasimi, H.
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Nuti, A.
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Oppedisano, C.
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Orsini, L.
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Pesce-Rollins, M.
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Pinchera, M.
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Profeti, A.
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Sgrò, C.
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Spandre, G.
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Tardiola, M.
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Zanetti, D.
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Andersson, H.
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•
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Baumgartner, W.
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Carpentiero, R.
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Castronuovo, M.
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Cavalli, L.
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Cavazzuti, E.
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•
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D'Alba, E.
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D'Amico, F.
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Di Cosimo, S.
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•
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Donnarumma, I.
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•
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Ferrazzoli, R.
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Kitaguchi, T.
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•
•
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Lorenzi, P.
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Mangraviti, E.
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Matt, G.
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Meilahti, T.
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•
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Nakano, T.
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Negri, B.
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Nenonen, S.
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O'Dell, S. L.
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Pieraccini, S.
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Puccetti, S.
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Ramsey, B. D.
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Rankin, J.
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Ratheesh, A.
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Rubini, A.
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Sarra, P.
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Scalise, E.
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Sciortino, A.
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Tamagawa, T.
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Tennant, A. F.
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Uchiyama, K.
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Vimercati, M.
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Weisskopf, M. C.
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Zanetti, F.
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Zhou, Y.
DOI
Abstract
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.

Volume
133
Start page
102628
Uri
Url
Issn Identifier
0927-6505
Ads BibCode
2021APh...13302628B
Rights
open.access
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