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Dr. Louis M Barbier

Astrophysics Science Division
Code 661, Astroparticle Physics Laboratory
Greenbelt, MD 20771

tel: 301-286-4054
fax: 301-286-1682
e-mail: Louis.M.Barbier @

Present Position

Astropysicist, Astroparticle Physics Laboratory, NASA/GSFC
Associate Chief Scientist, NASA Engineering and Safety Center (NESC)

Brief Bio

I came to Goddard in 1987 as an NAS/NRC postdoc to work in the high energy cosmic ray group. My PhD was in high energy particle physics. At Goddard, my research has focused on the origin and evolution of galactic cosmic rays, the study of particle acceleration and transport within the solar system, measurements of the antimatter component of cosmic rays and searches for dark matter. More recently I have been working on Swift - an Explorer mission to study gamma-ray bursts.

My background is in hardware development and I work on the design and testing of new instruments for gamma ray detection and imaging and cosmic ray measurements. This background meshes nicely with my role in technology management and development in the Exploration of the Universe division.

I am a member of the American Physical Society (APS), the American Geophysical Union (AGU), the Institute of Electrical and Electronics Engineers (IEEE), and the American Institute of Aeronautics and Astronautics (AIAA).

I am the Deputy Balloon Project Scientist and the Associate Chief Scientist of the NASA Engineering and Safety Center (NESC)

When I'm not at work I enjoy tennis, hiking, and painting.

Educational Background

1987, PhD, Physics, Louisiana State University
1983, M.S., Physics, Louisiana State University
1979 B.S., Loyola University, New Orleans

Research Interests

Current Projects

Neutron Imaging Camera
Swift - Gamma Ray Burst MIDEX
CREAM - the Cosmic-Ray Energetics and Mass Experiment
NIGHTGLOW - A balloon-borne instrument to measure the near UV airglow
TIGER - the Trans-Iron Galactic Element Recorder, for ultraheavy cosmic-ray studies
POGO - a gamma-ray polarimeter instrument

Universe Theme Technologist for Goddard

Volunteer for the Cosmic and Heliospheric Learning Center "Ask a Physicist"

Selected Publications

Recent Invited Talks:

COSPAR (Beijing, China), "Ultra Heavy Cosmic ray Measurements and their Astrophysical Interpretation", July 2006

George Mason University, "Results from the first year of the Swift Gamma-ray Burst Mission", April 2006

IEEE/AIAA Aerospace Conference, “Astrophysics of the 21st Century –Exploring the Extreme Universe”, Big Sky, Montana, March 2006

AIAA Space 2005, “Beyond Einstein”, Long Beach, CA, August 2005

Bartol Research Institute, University of Delaware, "Solid State Detectors and Applications in Astrophysics", September 2002

University of Maryland, Dept. of Physics, "Near Ultraviolet Nightglow and Ultrahigh Energy Cosmic Rays", October 2002


"Astrophysics with 3-DTI Gamma-Ray Telescope", S. D. Hunter, R. G. Baker, L. M. Barbier, et al., 2006, IEEE Nuclear Science Symposium, October, San Diego.

"Are Short GRBs Really Hard?", T. Sakamoto, L. Barbier, S. Barthelmy, et al., Proc. "Gamma Ray Bursts in the Swift Era", eds. S. Holt, N. Gehrels, J. Nousek, 2006.

"Swift and XMM Observations of the Dark Burst 050326", A. Moretti, A. De Luca, D. Malesani, et al., 2006 Astron. and Astrophysics, 451, 777.

"Perfromance of a Dual Layer Silicon Charge Detector during CREAM Balloon Flights", S. Nam, H. S. Ahn, P. Allison, et al., 2006, IEEE RTSD Workshop.

"The CREAM Collaboration: Performance Tests and Flights", M. H. Lee, H. S. Ahn, P. Allison, et al., 2006, AIP Conf. Proc. 867, 167.

"Preliminary Results from the Second Flight of CREAM", P. S. Marrocchesi, H. S. Ahn, P. Allison, et al., 2006 COSPAR, Beijing, China.

"Global Properties of X-ray Flashes and X-ray-rich GRBs Observed by Swift", D. Hullinger, T. Sakamoto, L. Barbier, et al., submitted to ApJ, May 2006.

Confirmation of the Epeak-Eiso (Amati) Relation from XRF 050416A Observed by the Swift BAT", T. Sakamoto, L. Barbier, S. Barthelmy, J. Cummings, E. Fenimore, N. Gehrels, D. Hullinger, H. Krimm, C. Markwardt, D. Palmer, A. Parsons, G. Sato, & J. Tueller, 2006 ApJ, 636, L73.

"A Search for the signature of microquasars in the cosmic-ray iron spectrum measured by TIGER", S. Geier, L. M. Barbier, W. R. Binns, et al., 2006 Adv. in Space Research 37, 1955.

"A short gamma ray burst apparently associated with an elliptical galaxy at z=0.225", Gehrels, N., Barbier, L. M., Barthelmy, S. D., et al., 2005 Nature 437, 851.

"Gamma Ray Observations of a Giant Flare from the SGR 1806-20", Palmer, D. M., Barthelmy, S. D., Gehrels, N., et al., Letters to Nature, 28APR2005, 1107.

The Burst Alert Telescope on the Swift MIDEX Mission", S. Barthelmy, et al., 2005 Sp. Sci. Rev. , 120, 143.

"NIGHTGLOW: An Instrument to Measure the Earth's Nighttime Ultraviolet Glow - Results from the first Engineering Flight", Barbier, L. M., Smith, R., Murphy, S., et al., 2004 Astroparticle Physics, 22(5-6), 439.

"The Swift Gamma Ray Burst Mission", Gehrels, N., Chincarini, G., Giommi, P., et al., 2004 ApJ, 611, 1105.

"Observing the Ultrahigh Energy Universe with OWL Eyes", Stecker, F. W., Krizmanic, J. F., Barbier, L. M., et al., 2004 Nucl. Physics B, 136C, 433.

"PoGO: the Polarized Gamma-ray Observer", Larsen, S, et al., NIM A, submitted, October 2004.

"Large-Area Balloon Borne Gamma Ray Observer (PoGO)", Blandford, R., et al., IEEE Trans. Nucl. Sci, in press, 2004.

"Abundance of the Radioactive 10Be in the Cosmic Radiation up to 2 Gev per nucleon with the balloon-borne instrument ISOMAX1998", Hams, T., Barbier, L. M., Bremerich, M., et al., 2004 ApJ, 661, 892.

"Co/Ni Ratio in the Galactic Cosmic Rays between 0.8 and 4.3 GeV/nucleon", Sposato, S. H., Barbier, L. M., Binns, W. R., et al., 2000, AIP Conference Proceedings vol 528, editors R. A. Mewaldt, J. R. Jokippi, M. A. Lee, and T. H. Zirbuchen, page 473ff.

"The Absolute Flux of Protons and Helium at the Top of the Atmosphere using IMAX", Menn, W., Hof, M., Reimer, O., et. al., 2000, ApJ, 533(1), 281.

"CdZnTe and CdTe Detector Arrays for Hard X-Ray and Gamma-Ray Astronomy", Stahle, C. M., Parker, B. H., Parsons, A. M., et al., 1999, Nucl. Inst. and Methods 436A, 138.

"Large Area scintillating fiber time-of-flight hodoscope detectors for particle astrophysics experiments", D. J. Lawrence, L. M. Barbier, J. J. Beatty, et al., 1999, Nucl. Inst. and Methods A, 420, 402.

"XA Readout Chip Characteristics and CdZnTe Spectral Measurements", L. M. Barbier, F. Birsa, J. Odom, et al., 1999,IEEE Trans. on Nucl. Sci., vol. 46(1), 7.

"The POEMS Strip Detector ASIC Chip", Barbier, L. M., Karageorge, E., and Singh, S., 1998, Nucl. Inst. and Methods A, 417,354-359.

"The Cosmic Ray 3He/4He Ratio From 200 MeV/nucleon to 3.7 GeV/nucleon", O. Reimer, W. Menn, M. Hof, et al., 1998, ApJ, 496, 490.

"Performance of a Prototype Segmented CdZnTe Arrays", Parsons, A.M., Palmer, D., Kurczynski, P., et al., 1998, Material Research Society, 487.

"Fabrication of CdZnTe Strip Detectors for Large Area Arrays", Stahle, C.M., Shi, Z.Q., Hu, K, et al., 1998, Material Research Society, 487.

"Energy Spectra of Ions Accelerated in Impulsive and Gradual Solar Events",Reames, D. V., Barbier, L. M., von Rosenvinge, T. T., Mason, G. M., Mazur, J. E., and Dwyer, J. R., 1997, ApJ, 483, 515.

"CZT Strip Detectors for Imaging and Spectroscopy: Collimated Beam and ASIC Readout Experiments", Kurczynski, P., Krizmanic, J. F., Stahle, C. M, et al. 1997 IEEE Trans. Nuc. Sci., 44, 1011.

"Measurement of 0.2 - 3.2 GeV antiprotons in the cosmic radiation", Mitchell, J. W., Barbier, L. M., Christian, E. R., et al., 1996 PRL 76, 3057.

"WIND/EPACT Observations of Anomalous Cosmic Rays", Reames, D. V., Barbier, L. M., and von Rosenvinge, T. T., 1997 Adv. Space Res.,19, 809.

"CdZnTe Detectors for Gamma-ray Burst Arc Second Imaging and Spectroscopy", Stahle, C. M., Palmer, D., et al., 1996, NIM 380A, 486.

"The Spatial Distribution of Particles Accelerated by CME Driven Shocks", Reames, D. V., Barbier, L. M., and Ng, C. K., 1996, ApJ 466, 473.

"The EPACT Experiment", von Rosenvinge, T. T., et al. 1994, Space Sciences Review 71, 155.

"Isotopic Composition of Silicon and Iron in the Galactic Cosmic Radiation", Hesse, A., et al., 1995, A&A 314, 785.

"Performance of Drift Chambers in a Magnetic Rigidity Spectrometer for Measuring the Cosmic Radiation", Hof, M., et al., 1994, NIM A345, 561.

"Corotating MeV/amu Ion Enhancements at < 1 AU from 1978 to 1986", Richardson, I. G., Barbier, L. M. Reames, D. V. and von Rosenvinge, T. T. 1993, JGR 98, 12.

"The ALICE Instrument and the measured cosmic ray elemental abundances", Esposito, J. A., et al., 1992, Astroparticle Physics, 1, 33.

"On the Differences in Element Abundances of Energetic Ions From Corotating Events and From Large Solar Events", Reames, D. V., Richardson, I. G., and Barbier, L. M. 1991, Ap. J. Letters, 382, L43.

"Nucleus-Nucleus Interactions at 14.6, 60, and 200 GeV/n", Barbier, L. M. et al. 1989, Nuclear Physics A498, 535.

"Evidence for Intermittent Patterns of Fluctuations in Particle Production in High Energy Interactions in Nuclear Emulsion", Holynski, R., et al. 1989, PRL 62(7), 733.

"Central Collisions of 800 GeV Protons with Ag and Br Nuclei", Barbier, L. M., et al. 1989, PRD 39(1), 86.

"Single and Multiparticle Analysis of Nucleus-Nucleus Collisions and 14.6, 60, and 200 GeV/n" , von Gersdorff, H., Amundson, J., et al. 1989, PRC 39(4), 1385.

"Correlations Among Particles Produced in Proton Interactions with Emulsion Nuclei at 800 GeV", Barbier, L. M., Jones, W. V., et al. 1988, PRD 37(5), 1113.

"Central Collisions of 14.6, 60, and 200 GeV/n 16O Nuclei in Nuclear Emulsion", Barbier, L. M., et al. 1988, PRL 60(5), 405.

"Charged Particle Multiplicity and Angular Distributions in Proton Emulsion Interactions at 800 GeV", Abduzhamilov, A., Barbier, L. M., et al. 1987, PRD 35, 3537.

"Interactions of 800 GeV Protons from Fermilab with Emulsion Nuclei", Abdurazakova, Y. A., et al. 1987, Acta Phys. Pol. B18, 249.