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 VersionAbstractWe 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 VersionAbstractWe 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.