A pair production telescope for medium-energy gamma-ray polarimetry

We describe the science motivation and development of a pair production telescope for medium-energy (∼5–200MeV) gamma-ray polarimetry. Our instrument concept, the Advanced Energetic Pair Telescope (AdEPT), takes advantage of the Three-Dimensional Track Imager, a low-density gaseous time projection c...

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Published inAstroparticle physics Vol. 59; pp. 18 - 28
Main Authors Hunter, Stanley D., Bloser, Peter F., Depaola, Gerardo O., Dion, Michael P., DeNolfo, Georgia A., Hanu, Andrei, Iparraguirre, Marcos, Legere, Jason, Longo, Francesco, McConnell, Mark L., Nowicki, Suzanne F., Ryan, James M., Son, Seunghee, Stecker, Floyd W.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2014
Subjects
Angular resolution
Gamma rays
Pair production
Polarimetry
Sensitivity
Time projection chamber
Gamma rays
Pair production
Sensitivity
Angular resolution
Polarimetry
Time projection chamber
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Summary:We describe the science motivation and development of a pair production telescope for medium-energy (∼5–200MeV) gamma-ray polarimetry. Our instrument concept, the Advanced Energetic Pair Telescope (AdEPT), takes advantage of the Three-Dimensional Track Imager, a low-density gaseous time projection chamber, to achieve angular resolution within a factor of two of the pair production kinematics limit (∼0.6° at 70MeV), continuum sensitivity comparable with the Fermi-LAT front detector (<3×10−6MeVcm−2s−1 at 70MeV), and minimum detectable polarization less than 10% for a 10mCrab source in 106s.
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content type line 23
ISSN:0927-6505
1873-2852
DOI:10.1016/j.astropartphys.2014.04.002