A Pair Production Telescope for Medium-Energy Gamma-Ray Polarimetry

Journal Article · Fri Aug 01 00:00:00 EDT 2014 · Astroparticle Physics, 59:18-28

DOI:https://doi.org/10.1016/j.astropartphys.2014.04.002· OSTI ID:1155124

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.

We describe the science motivation and development of a pair production telescope for medium-13 energy gamma-ray polarimetry. Our instrument concept, the Advanced Energetic Pair Telescope 14 (AdEPT), takes advantage of the Three-Dimensional Track Imager, a low-density gaseous time 15 projection chamber, to achieve angular resolution within a factor of two of the pair production 16 kinematics limit (~0.6° at 70 MeV), continuum sensitivity comparable with the Fermi-LAT front 17 detector (<3×10-6 MeV cm-2 s-1 at 70 MeV), and minimum detectable polarization less than 10% 18 for a 10 millicrab source in 106 seconds.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1155124
• Report Number(s): PNNL-SA-99591
• Journal Information: Astroparticle Physics, 59:18-28, Journal Name: Astroparticle Physics, 59:18-28
• Country of Publication: United States
• Language: English