Positions

Publications

Academic Article

Year Title
2018 Evidence of Energy and Charge Sign Dependence of the Recovery Time for the 2006 December Forbush Event Measured by the PAMELA Experiment.  Astrophysical Journal.  853:76-76. 2018
2017 Geomagnetically trapped, albedo and solar energetic particles: Trajectory analysis and flux reconstruction with PAMELA.  Advances in Space Research.  60:788-795. 2017
2015 COMPARATIVE MORPHOLOGY OF SOLAR RELATIVISTIC PARTICLE EVENTS.  Astrophysical Journal Letters.  811:L9-L9. 2015
2015 SOLAR INTERACTING PROTONS VERSUS INTERPLANETARY PROTONS IN THE CORE PLUS HALO MODEL OF DIFFUSIVE SHOCK ACCELERATION AND STOCHASTIC RE-ACCELERATION.  Astrophysical Journal.  806:80-80. 2015
2015 Misidentification of the source of a neutron transient detected by MESSENGER on 4 June 2011.  Journal of Geophysical Research.  120:1-11. 2015
2014 Testing and simulation of silicon photomultiplier readouts for scintillators in high-energy astronomy and solar physics.  Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.  763:26-35. 2014
2014 A pair production telescope for medium-energy gamma-ray polarimetry.  Astroparticle Physics.  59:18-28. 2014
2012 CONSTRAINTS ON THE EMISSION MODEL OF THE "NAKED-EYE BURST" GRB 080319B.  Astrophysical Journal Letters.  753:L31-L31. 2012
2012 SPECTRUM AND MORPHOLOGY OF THE TWO BRIGHTEST MILAGRO SOURCES IN THE CYGNUS REGION: MGRO J2019+37 AND MGRO J2031+41.  Astrophysical Journal.  753:159-159. 2012
2012 OBSERVATION AND SPECTRAL MEASUREMENTS OF THE CRAB NEBULA WITH MILAGRO.  Astrophysical Journal.  750:63-63. 2012
2012 On the sensitivity of the HAWC observatory to gamma-ray bursts.  Astroparticle Physics.  35:641-650. 2012
2011 Physics of solar neutron production: Questionable detection of neutrons from the 31 December 2007 flare.  Journal of Geophysical Research.  116. 2011
2009 Calibration of the Fast Neutron Imaging Telescope (FNIT) Prototype Detector.  IEEE Transactions on Nuclear Science.  56:2947-2954. 2009
2009 MILAGRO OBSERVATIONS OF MULTI-TeV EMISSION FROM GALACTIC SOURCES IN THE FERMI BRIGHT SOURCE LIST (vol 700, pg L127, 2009).  Astrophysical Journal.  703:L185-L185. 2009
2009 High energy neutron and pion-decay gamma-ray emissions from solar flares.  Chinese Astronomy and Astrophysics Chinese Journal of Astronomy and Astrophysics Research in Astronomy and Astrophysics.  9:11-40. 2009
2008 MEASUREMENT OF THE SPATIAL DISTRIBUTION OF DIFFUSE TeV GAMMA-RAY EMISSION FROM THE GALACTIC PLANE WITH MILAGRO.  Astrophysical Journal.  688:1078-1083. 2008
2008 Discovery of localized regions of excess 10-TeV cosmic rays..  Physical Review Letters.  101:221101. 2008
2006 The CASTER black hole finder probe.  New Astronomy Reviews Vistas in Astronomy.  50:633-636. 2006
2006 The MEGA project: Science goals and hardware development.  New Astronomy Reviews Vistas in Astronomy.  50:619-623. 2006
2006 The MEGA project for Medium Energy Gamma-ray Astronomy.  Chinese Astronomy and Astrophysics Chinese Journal of Astronomy and Astrophysics Research in Astronomy and Astrophysics.  6:388-392. 2006
2005 Development and calibration of the tracking Compton/Pair telescope MEGA.  Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.  541:310-322. 2005
2005 A fast neutron imaging telescope for inner hellosphere missions.  Advances in Space Research.  36:1399-1405. 2005
2005 Applications of a phoswich-based detector for fast (similar to 1-10 MeV) solar neutrons for missions to the inner heliosphere.  Advances in Space Research.  36:1432-1438. 2005
2004 Search for very high energy gamma rays from WIMP annihilations near the Sun with the Milagro detector.  Physical Review D.  70. 2004
2004 Single-sided CZT strip detectors.  IEEE Transactions on Nuclear Science.  51:2453-2460. 2004
2004 Limits on very high energy emission from gamma-ray bursts with the Milagro observatory.  Astrophysical Journal.  604:L25-L28. 2004
2004 Applications of gas imaging micro-well detectors to an advanced Compton telescope.  New Astronomy Reviews Vistas in Astronomy.  48:299-303. 2004
2004 Astrophysics challenges of MeV-astronomy instrumentation.  New Astronomy Reviews Vistas in Astronomy.  48:199-204. 2004
2004 Status and prospects for polarimetry in high energy astrophysics.  New Astronomy Reviews Vistas in Astronomy.  48:215-219. 2004
2004 Hard X-ray solar flare polarimetry with RHESSI.  Advances in Space Research.  34:462-466. 2004
2003 Observation of TeV gamma rays from the Crab Nebula with Milagro using a new background rejection technique.  Astrophysical Journal.  595:803-811. 2003
2003 The high-energy gamma-ray fluence and energy spectrum of GRB 970417a from observations with Milagrito.  Astrophysical Journal.  583:824-832. 2003
2002 Solar proton rigidity spectra from 1 to 10 GV of selected flare events since 1960.  Solar Physics.  208:113-140. 2002
2002 The soft gamma-ray spectral variability of Cygnus X-1.  Astrophysical Journal.  572:984-995. 2002
2001 A survey of the northern sky for TeV point sources.  Astrophysical Journal.  558:477-481. 2001
2001 Gamma-ray spectral variability of Cygnus X-1.  AIP Conference Proceedings.  587:96-100. 2001
2001 Improved analysis of COMPTEL solar neutron data, with application to the 15 June 1991 flare.  Iau Symposia.  203:573-576. 2001
2000 A high-sensitivity measurement of the MeV gamma-ray spectrum of Cygnus X-1.  Astrophysical Journal.  543:928-937. 2000
2000 Evidence for TeV Emission from GRB 970417a..  Astrophysical Journal.  533:L119-L122. 2000
2000 Solar energetic particles.  Space Science Reviews.  93:35-53. 2000
2000 The spectral variability of Cygnus X-1 at MeV energies.  AIP Conference Proceedings.  510:114-118. 2000
1999 Instrumented Water Tanks can Improve Air Shower Detector Sensitivity.  ArXiv Astrophysics e-prints.  1999
1999 An All-Sky Search for Steady VHE Gamma-Ray Sources.  ArXiv Astrophysics e-prints.  1999
1999 Calibration of the Milagro Cosmic Ray Telescope.  ArXiv Astrophysics e-prints.  1999
1999 Detection of 6 November 1997 Ground Level Event by Milagrito.  ArXiv Astrophysics e-prints.  510:574-578. 1999
1999 Milagrito Detection of TeV Emission from Mrk 501.  ArXiv Astrophysics e-prints.  1999
1999 Search for Short Duration Bursts of TeV Gamma Rays with the Milagrito Telescope.  ArXiv Astrophysics e-prints.  1999
1999 Search for a TeV Component of GRBs using the Milagrito Detector.  ArXiv Astrophysics e-prints.  1999
1999 Status of the Milagro Gamma Ray Observatory.  ArXiv Astrophysics e-prints.  1999
1999 Study of the Shadows of the Moon and the Sun with VHE Cosmic Rays.  ArXiv Astrophysics e-prints.  1999
1998 Development of a hard X-ray polarimeter for solar flares and gamma-ray bursts.  IEEE Transactions on Nuclear Science.  45:910-914. 1998
1998 COMPTEL measurements of the omnidirectional high-energy neutron flux in near-earth orbit..  Advances in Space Research.  21:1789-1792. 1998
1998 Characteristics of gamma-ray bursts at MeV energies measured by COMPTEL.  Advances in Space Research.  22:1097-1100. 1998
1998 The locations of gamma-ray bursts measured by COMPTEL.  Astrophysical Journal.  492:246-262. 1998
1997 Performance and simulation of CdZnTe strip detectors as sub-millimeter resolution imaging gamma radiation spectrometers.  IEEE Transactions on Nuclear Science.  44:922-928. 1997
1997 The relationship between solar flare gamma-ray emission and neutron production.  Solar Physics.  173:151-176. 1997
1997 Energetic neutrons, protons, and gamma rays during the 1990 May 24 solar cosmic-ray event.  Astrophysical Journal.  479:997-1011. 1997
1996 Development of an orthogonal-stripe CdZnTe gamma radiation imaging spectrometer.  IEEE Transactions on Nuclear Science.  43:1458-1462. 1996
1995 Evidence for Co-56 line emission from the type Ia supernova 1991T using COMPTEL.  Annals of the New York Academy of Sciences Annals of The Lyceum of Natural History of New York.  759:397-400. 1995
1993 SOLAR NEUTRON AND PROTON PRODUCTION DURING THE 1990 MAY 24 COSMIC-RAY FLARE INCREASES.  Astrophysical Journal.  409:822-829. 1993
1993 COMPTEL DETECTIONS OF THE QUASARS 3C-273 AND 3C-279.  Astronomy and Astrophysics Supplement Series.  97:97-100. 1993
1992 THE SOLAR-FLARE EVENT ON 1990 MAY 24 - EVIDENCE FOR 2 SEPARATE PARTICLE ACCELERATIONS.  Astrophysical Journal.  387:L51-L54. 1992
1990 TOSSED IN SPACE - ORBITAL DEBRIS ENDANGERS INSTRUMENTS AND ASTRONAUTS.  The Sciences.  30:14-20. 1990
1986 PARTICLE PROPAGATION EFFECTS ON SOLAR-FLARE X-RAY AND GAMMA-RAY TIME PROFILES.  Solar Physics.  105:365-382. 1986
1983 GAMMA-RAY OBSERVATIONAL CONSTRAINTS ON THE ORIGIN OF THE OPTICAL CONTINUUM EMISSION FROM THE WHITE-LIGHT FLARE OF 1980 JULY 1.  Astrophysical Journal.  272:L61-L65. 1983
1981 LIMIT ON A GALACTIC 6.13 MEV GAMMA-RAY LINE.  Astrophysical Journal.  244:1081-1086. 1981
1981 OBSERVATION OF THE 2.223 MEV GAMMA-RAY LINE ON THE SMM SATELLITE - THE EVENT OF 1980 JUNE 7.  Astrophysical Journal.  244:L171-L174. 1981
1981 OBSERVATIONS WITH THE SMM GAMMA-RAY SPECTROMETER - THE IMPULSIVE SOLAR-FLARES OF 1980 MARCH 29.  Astrophysical Journal.  244:L175-L178. 1981
1980 GAMMA-RAY SPECTROMETER FOR THE SOLAR MAXIMUM MISSION.  Solar Physics.  65:15-23. 1980
1977 ATMOSPHERIC GAMMA-RAY ANGLE AND ENERGY-DISTRIBUTIONS FROM 2 TO 25 MEV.  Journal of Geophysical Research.  82:3593-3601. 1977
1977 COSMIC DIFFUSE GAMMA-RAYS FROM 2 TO 25 MEV.  Astrophysical Journal.  218:920-927. 1977
Back-Tracing and Flux Reconstruction for Solar Events with PAMELA

Conference Proceeding

Year Title
2013 An imaging neutron/gamma-ray spectrometer.  Proceedings of SPIE - The International Society for Optical Engineering. 2013
2012 An Imaging Neutron/Gamma-Ray Spectrometer.  Proceedings of SPIE - The International Society for Optical Engineering. 2012
2010 A fast scintillator Compton telescope for medium-energy gamma-ray astronomy.  Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. 773222-773222. 2010
2010 A fast scintillator Compton telescope for medium-energy gamma-ray astronomy.  Proceedings of SPIE - The International Society for Optical Engineering. 132.12-132.12. 2010
2009 A new low-background Compton telescope using LaBr3 scintillator.  UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVI. 74350H-74350H. 2009
1981 A SEARCH FOR COSMIC AND SOLAR GAMMA-RAY LINES USING THE SMM GRE DETECTOR.  Bulletin- American Physical Society. 541-541. 1981
1981 EVIDENCE FOR IMPULSIVE ION-ACCELERATION DURING THE 0312-UT FLARE OF 1980, JUNE 7.  Bulletin- American Physical Society. 541-541. 1981
1976 ENERGY AND ANGULAR RESPONSES OF A DOUBLE COMPTON-SCATTERING TELESCOPE.  Bulletin- American Physical Society. 1307-1307. 1976

Patents And Disclosures

Year Title
Method and Apparatus for Imaging through 3-Dimensional Tracking of Protons
Neutron and Gamma-Ray Detection System
Neutron and Gamma-ray Detection System
Tri-Material Dual-Species Imaging Spectrometer

Principal Investigator On

  • New Techniques for Neutron Spectrometers  awarded by National Aeronautics and Space Administration (NASA) 2017 - 2020
  • Rejuvenation of the UNH Neutron Monitor Network  awarded by National Science Foundation (NSF) 2018 - 2019
  • Impulsive Ion Escape at the Sun  awarded by National Aeronautics and Space Administration (NASA) 2016 - 2019
  • The Origin of the High-Energy Solar Energetic Particles  awarded by National Aeronautics and Space Administration (NASA) 2014 - 2018
  • Identifying the Acceleration Processes of High-Energy Solar Particles with PAMELA Observations  awarded by National Science Foundation (NSF) 2011 - 2018
  • Energy Release, Acceleration, and Escape of Solar Energetic Ions  awarded by National Aeronautics and Space Administration (NASA) 2013 - 2018
  • Re-Deploying the Mt. Washington Neutron Monitor  awarded by National Science Foundation (NSF) 2014 - 2017
  • Optimization and Testing of the Three-Dimensional Track Imager (3-DTI) for Future Gamma-Ray Imaging Telescopes  awarded by National Aeronautics and Space Administration (NASA) 2012 - 2016
  • SMM-GRS Data Preservation and Publication  awarded by National Aeronautics and Space Administration (NASA) 2011 - 2015
  • Constraining the Sources and Acceleration Process of Solar Energetic Particles  awarded by National Aeronautics and Space Administration (NASA) 2012 - 2015
  • Real-Time Portable Neutron Spectroscope "NSPECT"  awarded by Michigan Aerospace Corporation 2011 - 2013
  • MAC-LIDI Army Hypersonic Program  awarded by Michigan Aerospace Corporation 2013
  • Development of an Advanced Scintillator Compton Tlescope  awarded by National Aeronautics and Space Administration (NASA) 2009 - 2011
  • Comparison of Accelerated Particle Populations at 1 Au and at the Sun  awarded by US DOD, Navy 2008 - 2011
  • Real-Time Portable Neutron Spectroscopy  awarded by Michigan Aerospace Corporation 2008 - 2010
  • Simulation, Modeling and Real-Time Algorithm Development for Fast Neutron Imaging Telescopes  awarded by US DOE, Department of Energy 2006 - 2010
  • Milagro: A Detector for Studying Solar Cosmic Rays  awarded by US DOE, Los Alamos National Laboratory 2007 - 2009
  • Advanced Development of 3-d Imaging, Thick, Co-planar Strip Detector/Spectrometer Arrays  awarded by National Aeronautics and Space Administration (NASA) 2005 - 2009
  • Development of Fast Neutron Imaging Telescope  awarded by US DOE, Department of Energy 2004 - 2008
  • SONTRAC Fiber Bundle  awarded by University of Alabama 2007 - 2008
  • Active Interrogation System for Detecting and Identifying SNM  awarded by Radiation Monitoring Devices, Inc. 2007
  • Real-Time Portable Neutron Spectroscopy  awarded by Michigan Aerospace Corporation 2007
  • Three-Dimensional Track Imaging Detectors for Next-Generation Gamma Ray Telescopes  awarded by National Aeronautics and Space Administration (NASA) 2005 - 2007
  • Cosmic Ray Modulation & Solar Particle Studies Neutron Monit  awarded by National Science Foundation (NSF) 2004 - 2007
  • Summer School in High-Energy Solar Physics  awarded by National Aeronautics and Space Administration (NASA) 2006 - 2007
  • SONTRAC Readout  awarded by University of Alabama 2004 - 2006
  • Neutron Scatter Camera  awarded by US DOE, Sandia Laboratory 2005 - 2006
  • Advanced Compton Telescope  awarded by University of California at Berkeley (UCB) 2004 - 2006
  • Fast Neutron Imaging Telescope  awarded by National Aeronautics and Space Administration (NASA) 2003 - 2005
  • Development of CZT Strip Detectors  awarded by National Aeronautics and Space Administration (NASA) 2001 - 2004
  • Lanthanum Bromide Scintillator Characterization  awarded by Radiation Monitoring Devices, Inc. 2002 - 2003
  • Scintillating Fiber Detectors For Gamma Ray Astronomy  awarded by National Aeronautics and Space Administration (NASA) 2001 - 2003
  • Gamma Ray Observatory Mission Operations & Data Analysis  awarded by National Aeronautics and Space Administration (NASA) 1984 - 2002
  • CZT Strip Detectors for Hard X-Ray Imaging with MARGIE  awarded by National Aeronautics and Space Administration (NASA) 1998 - 2001
  • Tracking & Imaging Gamma-Ray Experiment (TIGRE)  awarded by National Aeronautics and Space Administration (NASA) 1995 - 2001
  • Compton Symposium (Fifth)  awarded by National Aeronautics and Space Administration (NASA) 1999 - 2000
  • Consolidating the Vela Region I MeV Results  awarded by National Aeronautics and Space Administration (NASA) 1999 - 2000
  • Gamma-Ray Large Area Space Telescope (GLAST)  awarded by University of Alabama 1998 - 2000
  • SONTRAC - A Solar Neutron Tracking Device  awarded by National Aeronautics and Space Administration (NASA) 1998 - 2000
  • Minute-of-Arc Resolution Gamma Ray Imagining Experiment  awarded by Louisiana State University 1997 - 2000
  • ULDB Compton Telescope Mission Concept  awarded by National Aeronautics and Space Administration (NASA) 1997 - 2000
  • Minute-of-Arc Resolution Gamma Ray Imaging Experiment  awarded by National Aeronautics and Space Administration (NASA) 1996 - 2000
  • APD Arrays for Scintillating Fiber Readout  awarded by Radiation Monitoring Devices, Inc. 1998 - 1999
  • CGRO-Comptel Rapid Burst Response  awarded by National Aeronautics and Space Administration (NASA) 1998 - 1999
  • Solar Flare Nuclear Spectroscopy  awarded by National Aeronautics and Space Administration (NASA) 1998 - 1999
  • Cosmis Difuse Analysis  awarded by National Aeronautics and Space Administration (NASA) 1997 - 1998
  • Reprocessing Microflare Data  awarded by National Aeronautics and Space Administration (NASA) 1997 - 1998
  • Solar Physics Module (SPM) for the Milagro Telescope  awarded by US DOE, Los Alamos National Laboratory 1996 - 1998
  • Studies of Solar Microflares with BATSE  awarded by National Aeronautics and Space Administration (NASA) 1996 - 1997
  • Minute-of-Arc Resolution Gamma Ray Imaging Experiment  awarded by National Aeronautics and Space Administration (NASA) 1992 - 1997
  • SONTRAC, a Solar Neutron Track Chamber Telescope  awarded by National Aeronautics and Space Administration (NASA) 1994 - 1996
  • Gamma-Ray Burst Angular Distribution Studies with COMPTEL  awarded by National Aeronautics and Space Administration (NASA) 1993 - 1996
  • Gamma Ray Burst Detection Network  awarded by National Aeronautics and Space Administration (NASA) 1992 - 1996
  • Graduate Student Fellowship - Richard Miller  awarded by National Aeronautics and Space Administration (NASA) 1992 - 1994
  • Workshop on New Era of High Energy Solar Flare Measurements  awarded by National Aeronautics and Space Administration (NASA) 1992 - 1993

    • Investigator On

    Teaching Activities

  • Doctoral Research Taught course 2018
  • Electromagnetic Theory I Taught course 2018
  • General Physics II Recitation Taught course 2018
  • Electromagnetic Theory II Taught course 2017
  • General Physics I Recitation Taught course 2017
  • Electromagnetic Theory I Taught course 2017
  • General Physics II Recitation Taught course 2017
  • Electromagnetic Theory I Taught course 2016
  • Honors/General Physics I Taught course 2015
  • Doctoral Research Taught course 2015
  • General Physics II Recitation Taught course 2015
  • Optics Taught course 2015
  • General Physics I Studio Taught course 2014
  • Doctoral Research Taught course 2014
  • Experimental Physics I Taught course 2014
  • Experimental Physics I Taught course 2014

    • Education And Training

    Full Name

  • James Ryan