Publications

2016
McConnell ML, Anderson H, Collmar W, Zoglauer A. GRB Polarimetry with CGRO/COMPTEL, in Eighth Huntsville Gamma-Ray Burst Symposium. Vol 1962. ; 2016 :4049–4049.
McConnell ML, Collmar W. GRB Polarization Measurements with CGRO/COMPTEL, in AAS/High Energy Astrophysics Division. Vol 15. ; 2016 :112.04–112.04.
McConnell ML, Collaboration LEAP. LEAP - A LargE Area Burst Polarimeter for the ISS, in Eighth Huntsville Gamma-Ray Burst Symposium. Vol 1962. ; 2016 :4051–4051.
Ogasawara K, Ehresmann B, Retherford KD, Mandt KE, Livi SA, Schwadron N, Bloser P, Legere JS, McConnell M, McClanahan TP, et al. Required Performances for Future Lunar and Asteroid Neutron Spectroscopy, in Annual Meeting of the Lunar Exploration Analysis Group. Vol 1960. ; 2016 :5028–5028.
Shirazi F, Bloser PF, Aliotta PH, Echt O, Krzanowski JE, Legere JS, McConnell ML, Tsavalas JG, Wong EN, Kippen RM. Simulation and Optimization of Soft Gamma-Ray Concentrator Using Thin Film Multilayer Structures, in AAS/High Energy Astrophysics Division. Vol 15. ; 2016 :116.03–116.03.
Bloser PF, Legere JS, Bancroft CM, Ryan JM, McConnell ML. Balloon flight test of a Compton telescope based on scintillators with silicon photomultiplier readouts. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT [Internet]. 2016;812 :92–103. Publisher's Version
2015
Ryan JM, Bloser P, McConnell M, Legere J, Bancroft C, Murphy R, de Nolfo G. Advanced Scintillator-Based Compton Telescope for Solar Flare Gamma-Ray Measurements, in AAS/AGU Triennial Earth-Sun Summit. Vol 1. ; 2015 :403.14–403.14.
McConnell M. The Future of High Energy Polarimetry, in APS Meeting Abstracts. ; 2015.
McConnell M. Future Prospects for Space-Based Gamma Ray Astronomy, in APS April Meeting Abstracts. ; 2015.
Bloser PF, Aliotta PH, Echt O, Krzanowski JE, Legere JS, McConnell ML, Shirazi F, Tsavalas JG, Wong EN, Kippen RM. A soft gamma-ray concentrator using thin-film multilayer structures, in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series. Vol 9603. ; 2015 :96031E–96031E.
2014
McConnell M, Bloser P, Ertley C, Legere J, Ryan J, Wasti S. Latest Results from the Gamma Ray Polarimeter Experiment (GRAPE), in APS April Meeting Abstracts. ; 2014.
McConnell ML, Bloser PF, Ertley C, Legere J, Ryan JM, Wasti S. Recent Results and Future Plans for the Gamma Ray Polarimeter Experiment (GRAPE), in American Astronomical Society Meeting Abstracts #223. Vol 223. ; 2014 :149.10–149.10.
McConnell ML, Bloser PF, Ertley C, Legere J, Ryan JM, Wasti SK. Current status of the GRAPE balloon program, in Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray. Vol 9144. ; 2014 :91443P–91443P.
Bloser PF, McConnell ML, Legere JS, Ertley CD, Hill JE, Kippen M, Ryan JM. A high-energy Compton polarimeter for the POET SMEX mission, in Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray. Vol 9144. ; 2014 :91441I–91441I.
McConnell ML, Baring M, Bloser P, Dwyer JF, Emslie AG, Ertley CD, Greiner J, Harding AK, Hartmann DH, Hill JE, et al. POET: a SMEX mission for gamma ray burst polarimetry, in Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray. Vol 9144. ; 2014 :91440O–91440O.
Bloser PF, Legere JS, Bancroft CM, McConnell ML, Ryan JM. Scintillators with silicon photomultiplier readouts for high-energy astrophysics and heliophysics, in Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray. Vol 9144. ; 2014 :914414–914414.
Hunter SD, Bloser PF, Depaola GO, Dion MP, DeNolfo GA, Hanu A, Iparraguirre M, Legere J, Longo F, McConnell ML, et al. A pair production telescope for medium-energy gamma-ray polarimetry. ASTROPARTICLE PHYSICS [Internet]. 2014;59 :18–28. Publisher's Version
Bloser PF, Legere JS, Bancroft CM, Jablonski LF, Wurtz JR, Ertley CD, McConnell ML, Ryan JM. Testing and simulation of silicon photomultiplier readouts for scintillators in high-energy astronomy and solar physics. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT [Internet]. 2014;763 :26–35. Publisher's Version
2013
Bloser PF, McConnell ML, Connor T, Ertley C, Legere JS, Ryan JM. The First Science Flight of the Gamma-RAy Polarimeter Experiment (GRAPE), in AAS/High Energy Astrophysics Division. Vol 13. ; 2013 :123.10–123.10.
Madden AC, Bloser P, Fourguette D, Larocque L, Lewis M, Legere J, McConnell ML, Rouseau M, Ryan J. An imaging neutron/gamma-ray spectrometer, in SPIE Proceedings. ; 2013. Publisher's VersionAbstract
We present the test results of a neutron/gamma-ray imaging spectrometer for the identification and location of radioactive and special nuclear materials. Radioactive materials that could be fashioned into a radiation dispersal device typically emit gamma rays, while fissile materials such as uranium and plutonium emit both neutrons and gamma rays via spontaneous or induced fission. The simultaneous detection of neutrons and gamma rays is a clear indication of the presence of fissile material. The instrument works as a double-scatter telescope, requiring a neutron or gamma ray to undergo an interaction in two detectors to be considered a valid event. While this requirement reduces the detector efficiency, it yields information about the direction and energy of the incident particle, which is then used to reconstruct an image of the emitting source. Because of this imaging capability background events can be rejected, decreasing the number of events required for high confidence detection and thereby greatly improving its sensitivity. The instrument is optimized for the detection of neutrons with energies from 1-20 MeV and gamma rays from 0.4 to 10 MeV. Images and energy spectra for neutron and gamma rays are reported for several sources including depleted uranium and plutonium. In addition, the effect of neutron source shielding is investigated.

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