Publications

2013
McConnell ML, Baring MG, Bloser PF, Greiner J, Harding AK, Hartmann D, Hill JE, Kaaret P, Kippen RM, Pearce M, et al. PETS - A GRB Polarimetry Mission on the International Space Station, in AAS/High Energy Astrophysics Division. Vol 13. ; 2013 :123.11–123.11.
McConnell ML, Bloser PF, Connor TP, Ertley C, Legere J, Ryan JM, Wasti SK. Plans for the next GRAPE balloon flight, in UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVIII. Vol 8859. ; 2013 :885909–885909.
Bloser PF, Legere J, Bancroft C, McConnell ML, Ryan JM, Schwadron N. Scintillator gamma-ray detectors with silicon photomultiplier readouts for high-energy astronomy, in UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVIII. Vol 8859. ; 2013 :88590A–88590A.
2012
Hunter SD, Bloser PF, Dion MP, DeNolfo GA, Legere J, McConnell ML, Nowicki SF, Ryan JM, Son S, Stecker FW. Development of a telescope for medium-energy gamma-ray astronomy, in Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray. Vol 8443. ; 2012 :84430F–84430F.
Ryan J, Bancroft C, Bloser P, Fourguette D, Larocque L, Legere J, Madden AC, McConnell ML, Pavlich J, Ritter G, et al. An imaging neutron/gamma-ray spectrometer, in SPIE Proceedings. ; 2012. Publisher's VersionAbstract
We present the design and development of a dual-species, neutron/γ-ray imaging spectrometer for the identification and location of radioactive and special nuclear materials (SNM). Real-time detection and identification is important for locating fissile materials. These materials, specifically uranium and plutonium, emit neutrons and γ rays via spontaneous or induced fission. Co-located neutron and γ-ray emissions are a sure sign of fissile material, requiring very few spatially correlated events for a significant detection. Our instrument design detects neutrons and γ rays from all sources in its field of view, constructs images of the emission pattern, and reports the spectra for both species. The detection principle is based upon multiple elastic neutron-proton scatters in organic scintillator for neutrons, and Compton scattering in organic scintillator followed by photoelectric absorption in inorganic scintillator for γ rays. The instrument is optimized for neutron imaging and spectroscopy in the 1-20 MeV range. We recorded images and spectra of a Cf-252 source from 0.5 - 10 MeV, and have done similarly for several γ-ray sources. We report the results of laboratory testing of this expanded instrument and compare them to detailed Monte Carlo simulations using Geant4.
Roming PWA, Bilén SG, Burrows DN, Falcone AD, Fox DB, Herter TL, Kennea JA, McConnell ML, Nousek JA. Joint Astrophysics Nascent Universe Satellite:. utilizing GRBs as high redshift probes. Memorie della Societa Astronomica Italiana Supplementi. 2012;21 :155–155.
Ertley C, Bloser P, Connor T, Legere J, McConnell ML, Ryan JM. Measuring the Polarization of Hard X-Ray Solar Flares with GRAPE. AGU Fall Meeting Abstracts. 2012.
2011
Bloser PF, Ryan JM, Julien M, Legere JS, McConnell ML, Kippen RM, Tornga S, Wallace M. A Fast Scintillator Compton Telescope for Medium-Energy Gamma-Ray Astronomy, in American Astronomical Society Meeting Abstracts #218. Vol 43. ; 2011 :132.12–132.12.
Lin RP, Krucker S, Caspi A, Hurford G, Dennis B, Holman G, Christe S, Shih AY, Bandler S, Davila J, et al. Solar Eruptive Events (SEE) Mission for the Next Solar Maximum, in AAS/Solar Physics Division Abstracts #42. Vol 43. ; 2011 :22.04–22.04.
Kontar EP, Brown JC, Emslie AG, Hajdas W, Holman GD, Hurford GJ, Kasparova J, Mallik PCV, Massone AM, McConnell ML, et al. Deducing Electron Properties from Hard X-ray Observations. SPACE SCIENCE REVIEWS [Internet]. 2011;159 :301–355. Publisher's Version
2010
McConnell ML. GRB polarimetry with POET, in ; 2010 :355–355.
Mallik P, MacKinnon AL, Ryan JM, Woolf RS, Bloser PF, Bravar U, Legere JS, McConnell ML, Flueckiger EO, Pirard B. Data Inversion Techniques for SONNE: a Fast Neutron Spectrometer for Solar Probe Plus, in American Astronomical Society Meeting Abstracts #216. Vol 41. ; 2010 :860–860.
Hunter SD, Bloser PF, Dion MP, McConnell ML, DeNolfo GA, Son S, Ryan JM, Stecker FW. Development of the Advance Energetic Pair Telescope (AdEPT) for medium-energy gamma-ray astronomy, in Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Vol 7732. ; 2010 :773221–773221.
Bloser PF, Ryan JM, Legere JS, Julien M, Bancroft CM, McConnell ML, Wallace M, Kippen RM, Tornga S. A fast scintillator Compton telescope for medium-energy gamma-ray astronomy, in Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Vol 7732. ; 2010 :773222–773222.
Connor TP, Bancroft CM, Bloser PF, Legere JS, McConnell ML, Ryan JM. Plans for the first balloon flight of the gamma-ray polarimeter experiment (GRAPE), in Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Vol 7732. ; 2010 :77324E–77324E.
Ryan J, Bancroft C, Bloser P, Bravar U, Fourguette D, Frost C, Larocque L, McConnell ML, Legere J, Pavlich J, et al. A portable neutron spectroscope (NSPECT) for detection, imaging and identification of nuclear material, in SPIE Proceedings. ; 2010. Publisher's VersionAbstract
We have developed, fabricated and tested a prototype imaging neutron spectrometer designed for real-time neutron source location and identification. Real-time detection and identification is important for locating materials. These materials, specifically uranium and transuranics, emit neutrons via spontaneous or induced fission. Unlike other forms of radiation (e.g. gamma rays), penetrating neutron emission is very uncommon. The instrument detects these neutrons, constructs images of the emission pattern, and reports the neutron spectrum. The device will be useful for security and proliferation deterrence, as well as for nuclear waste characterization and monitoring. The instrument is optimized for imaging and spectroscopy in the 1-20 MeV range. The detection principle is based upon multiple elastic neutron-proton scatters in organic scintillator. Two detector panel layers are utilized. By measuring the recoil proton and scattered neutron locations and energies, the direction and energy spectrum of the incident neutrons can be determined and discrete and extended sources identified. Event reconstruction yields an image of the source and its location. The hardware is low power, low mass, and rugged. Its modular design allows the user to combine multiple units for increased sensitivity. We will report the results of laboratory testing of the instrument, including exposure to a calibrated Cf-252 source. Instrument parameters include energy and angular resolution, gamma rejection, minimum source identification distances and times, and projected effective area for a fully populated instrument.
Ertley C, Bancroft C, Bloser P, Connor T, Legere J, McConnell ML, Ryan J. Simulations of a monolithic lanthanum bromide gamma-ray detector, in SPIE Proceedings. ; 2010. Publisher's VersionAbstract
We have been working on the development of a detector design for a large area coded aperture imaging system operating in the 10-600 keV energy range. The detector design is based on an array of Lanthanum Bromide (LaBr3) scintillators, each directly coupled to a Hamamatsu 64-channel multi-anode photomultiplier tube (MAPMT). This paper focuses on the development of the GEANT4-based simulations as an aid in the optimization of the detector design. The simulations have been validated by comparisons with various laboratory data sets. We will summarize the current status and latest findings from this study.
2009
Woolf RS, Ryan JM, Bloser PF, Bravar U, Flückiger EO, Legere JS, MacKinnon A, Mallik PC, McConnell ML, Pirard B. Advanced characterization and simulation of SONNE: a fast neutron spectrometer for Solar Probe Plus, in Solar Physics and Space Weather Instrumentation III. Vol 7438. ; 2009 :74380S–74380S.
Bloser PF, Ryan JM, Legere JS, Julien M, Bancroft CM, McConnell ML, Wallace M, Kippen RM, Tornga S. A new low-background Compton telescope using LaBr3 scintillator, in UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVI. Vol 7435. ; 2009 :74350H–74350H.
Bloser PF, Case GL, Cherry ML, Greiner J, Kanbach, Kippen RM, McConnell ML, Miller RS, Ryan JM, Shah K, et al. Advanced Scintillators and Readout Devices for High-Energy Astronomy, in astro2010: The Astronomy and Astrophysics Decadal Survey. Vol 2010. ; 2009.

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