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Characterization of scatterers for an active focal plane Compton polarimeter

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Title: Characterization of scatterers for an active focal plane Compton polarimeter
Authors: Fabiani, Sergio1,2 sergio.fabiani@iaps.inaf.it, Campana, Riccardo2, Costa, Enrico2, Del Monte, Ettore2, Muleri, Fabio2, Rubini, Alda2, Soffitta, Paolo2
Source: Astroparticle Physics. Apr2013, Vol. 44, p91-101. 11p.
Subjects: Polariscope, Compton scattering, X-rays, Monte Carlo method, Physics experiments, Polarization (Nuclear physics)
Abstract: Abstract: In this work we present an active Compton scattering polarimeter as a focal plane instrument able to extend the X-ray polarimetry towards hard X-rays. Other authors have already studied various instrument design by means of Monte Carlo simulations, in this work we will show for the first time the experimental measurements of “tagging efficiency” aimed to evaluate the polarimeter sensitivity as a function of energy. We performed a characterization of different scattering materials by measuring the tagging efficiency that was used as an input to the Monte Carlo simulation. Then we calculated the sensitivity to polarization of a design based on the laboratory set-up. Despite the geometry tested is not optimized for a realistic focal plane instrument, we demonstrated the feasibility of polarimetry with a low energy threshold of 20keV. Moreover we evaluated a minimum detectable polarization of 10% for a 10mCrab source in 100ks between 20 and 80keV in the focal plane of one multilayer optics module of NuSTAR. The configuration used consisted of a doped p-terphenyl scatterer 3cm long and 0.7cm of diameter coupled with a 0.2cm thick LaBr3 absorber. [Copyright &y& Elsevier]
Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 86920719
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Characterization of scatterers for an active focal plane Compton polarimeter
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  Data: <searchLink fieldCode="AR" term="%22Fabiani%2C+Sergio%22">Fabiani, Sergio</searchLink><relatesTo>1,2</relatesTo><i> sergio.fabiani@iaps.inaf.it</i><br /><searchLink fieldCode="AR" term="%22Campana%2C+Riccardo%22">Campana, Riccardo</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Costa%2C+Enrico%22">Costa, Enrico</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Del+Monte%2C+Ettore%22">Del Monte, Ettore</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Muleri%2C+Fabio%22">Muleri, Fabio</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Rubini%2C+Alda%22">Rubini, Alda</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Soffitta%2C+Paolo%22">Soffitta, Paolo</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Astroparticle+Physics%22">Astroparticle Physics</searchLink>. Apr2013, Vol. 44, p91-101. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Polariscope%22">Polariscope</searchLink><br /><searchLink fieldCode="DE" term="%22Compton+scattering%22">Compton scattering</searchLink><br /><searchLink fieldCode="DE" term="%22X-rays%22">X-rays</searchLink><br /><searchLink fieldCode="DE" term="%22Monte+Carlo+method%22">Monte Carlo method</searchLink><br /><searchLink fieldCode="DE" term="%22Physics+experiments%22">Physics experiments</searchLink><br /><searchLink fieldCode="DE" term="%22Polarization+%28Nuclear+physics%29%22">Polarization (Nuclear physics)</searchLink>
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  Data: Abstract: In this work we present an active Compton scattering polarimeter as a focal plane instrument able to extend the X-ray polarimetry towards hard X-rays. Other authors have already studied various instrument design by means of Monte Carlo simulations, in this work we will show for the first time the experimental measurements of “tagging efficiency” aimed to evaluate the polarimeter sensitivity as a function of energy. We performed a characterization of different scattering materials by measuring the tagging efficiency that was used as an input to the Monte Carlo simulation. Then we calculated the sensitivity to polarization of a design based on the laboratory set-up. Despite the geometry tested is not optimized for a realistic focal plane instrument, we demonstrated the feasibility of polarimetry with a low energy threshold of 20keV. Moreover we evaluated a minimum detectable polarization of 10% for a 10mCrab source in 100ks between 20 and 80keV in the focal plane of one multilayer optics module of NuSTAR. The configuration used consisted of a doped p-terphenyl scatterer 3cm long and 0.7cm of diameter coupled with a 0.2cm thick LaBr3 absorber. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.astropartphys.2012.12.008
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 91
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      – SubjectFull: Polariscope
        Type: general
      – SubjectFull: Compton scattering
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      – SubjectFull: X-rays
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      – SubjectFull: Monte Carlo method
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      – SubjectFull: Physics experiments
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      – SubjectFull: Polarization (Nuclear physics)
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      – TitleFull: Characterization of scatterers for an active focal plane Compton polarimeter
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            NameFull: Fabiani, Sergio
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              Text: Apr2013
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