Dr. Donald V. Reames

Position: Astrophysicist Emeritus

Office: GSFC , Building 34, Room W392, Mail Code 661

Phone: (301) 286-6454

Fax: (301) 286-1215

E-mail: donald.v.reames@nasa.gov, dvreames@umd.edu

Home page: http://epact2.gsfc.nasa.gov/don



Born and raised in south Florida, Don Reames attended the University of California at Berkeley for both his undergraduate and graduate work. Receiving a Ph.D. in nuclear physics of heavy-ion reactions in 1964, he came to Goddard to work with a group studying element abundances of the heavy ions from solar events and in the galactic cosmic rays, using sounding rockets flown from Ft. Churchill, the Gemini XI spacecraft and high-altitude balloons. Subsequently, he analyzed data from energetic-particle detectors on the ISEE-3/ICE spacecraft and from similar instruments on IMP-8 and Helios 1 and 2 to study particle acceleration at the Sun and throughout the heliosphere. He used particle abundances to study wave-particle interactions that produce the 3He-rich, Fe-rich ions from impulsive solar flares, and studied the element abundances of the solar corona using particles accelerated by shock waves from large coronal mass ejections (CMEs) and in corotating interaction regions of the solar wind. He has done extensive correlations of particle measurements with radio, optical, X-ray and gamma-ray observations in solar flares in an effort to relate the photons to the energetic particles that produce them. CMEs and the particles they accelerate also have significant terrestrial effects.

Don Reames participated in the design, construction and testing of the Energetic Particles, Acceleration, Composition and Transport (EPACT) experiment on the WIND spacecraft launched November 1, 1994. EPACT is 100 times more sensitive than previous instruments and continues to greatly extended the element and isotope resolution and the energy coverage of particle observations. Don is also a Co-investigator on the IMPACT experiment on the STEREO mission launched in 2006.

Over the years Don's primary interest has been to understand the physics of particle acceleration in astrophysical plasmas. However, the pursuit of that goal has involved diverse activities from direct participation in work on acceleration or transport theory, to transferring liquid helium in Ft. Churchill, to calibrating detectors in a gold beam at Oak Ridge, to writing and debugging C programs for real-time data acquisition or graphic display.

In 2003 Don retired from the Civil Service to continue in an Emeritus position at Goddard. In 2007 he joined the University of Maryland, College Park where he is now a Senior Research Scientist.

Don received the 2001 John C. Lindsay Memorial Award for Space Sciences from Goddard and the 2012 George Ellery Hale Prize from the Solar Physics Division of the American Astronomical Society (video).

Selected Recent (1997-2013) Publications:
  • "Late-Phase Acceleration of Energetic Ions in Corotating Interaction Regions," Reames, D. V., Ng, C. K., Mason, G. M., Dwyer, J. R., Mazur, J. E., and von Rosenvinge, T. T., 1997, Geophys. Res. Letters, 24, 2917.
  • "Spatial and Temporal Invariance in the Spectra of Energetic Particles in Gradual Solar Events," Reames, D. V., Kahler, S. W., and Ng, C. K., 1997, ApJ, (Dec. 10) 414.
  • "Streaming-Limited Intensities of Solar Energetic Particles," Reames, D. V. and Ng, C. K., 1998, ApJ 504, 1002.
  • "Solar Energetic Particles: Sampling Coronal Abundances," Reames, D. V., 1998, Space Science Revs. 85, 327.
  • "Quiet-time Spectra and Abundances of Energetic Particles during the 1996 Solar Minimum," Reames, D. V., 1999, Astrophys. J., 518, 473.
  • "Solar Energetic Particles: Is There Time to Hide?" Reames, D. V., 1999, Radiation Measurements 30/3, 297.
  • "Observations of Systematic Temporal Evolution in Elemental Composition During Gradual Solar Energetic Particle Events," Tylka, A. J., Reames, D. V., and Ng, C. K., 1999, Geophys. Res. Letters, 26, 2141.
  • "Effect of Proton-Amplified Waves on the Evolution of Solar Energetic Particle Composition in Gradual Events," Ng, C. K., Reames, D. V., and Tylka, A. J., 1999, Geophys. Res. Letters, 26, 2145.
  • "Particle Acceleration at the Sun and in the Heliosphere," Reames, D. V., 1999, Space Science Revs. 90, 413. (SSRev.pdf)
  • "Energy-Dependent Ionization States of Shock-Accelerated Particles in the Solar Corona," Reames, D. V., Ng, C. K., and Tylka, A. J., 1999, Geophys. Res. Letters, 26, 3585.
  • "Particle Acceleration at CME-Driven Shock Waves," Reames, D. V., 1999, Highlight Paper in 26th International Cosmic Ray Conf. (Salt Lake City), Eds. B. L. Dingus, D. B. Kieda, and M. H. Salamon, AIP Conf. Series 516, 289.
  • "Initial Time Dependence of Abundances in Solar Particle Events," Reames, D. V., Ng, C. K., and Tylka, A. J., 2000, ApJ (Letters), 531, L83.
  • "The Observational Consequences of Proton-Generated Waves at Shocks," Reames, D. V., 2000, in Acceleration and Transport of Energetic Particles Observed in the Heliosphere, eds. R.A. Mewaldt, J.R. Jokipii, M.A. Lee, E. Moebius, and T.H. Zurbuchen, AIP Conference Proceedings, AIP Conf. Proc. 528, 79.
  • "Abundances of Trans-Iron Elements in Solar Energetic Particle Events, " Reames, D. V., 2000, ApJ (Letters) 540, L111.
  • "Heavy Ion Abundances and Spectra and the Large Gradual Solar Energetic Particle Event of 2000 July 14," Reames, D. V., Ng, C. K. and Tylka, A. J. 2001, ApJ (Letters) 548, L233.
  • "Angular Distributions of Solar Energetic Particles " Reames, D. V., Ng, C. K., and Berdichevsky, D. 2001, Ap. J. 550, 1064.
  • "SEPs: Space Weather Hazard in Interplanetary Space, " Reames, D. V., 2001, in Space Weather eds. P. Song, H. J. Singer, and G. Siscoe, Geophysical Monograph 125 (AGU, Washington, DC) p 101.
  • "Evidence for Remnant Flare Suprathermals in the Source Population of Solar Energetic Particles in the 2000 Bastile Day Event," Tylka, A. J., Cohen, C. M. S., Dietrich, W. F., Maclennan, C. G., McGuire, R. E., Ng, C. K., and Reames, D. V. 2001, ApJ (Letters) 558, L59.
  • "Energetic Particle Composition," Reames, D. V. 2001, in Solar and Galactic Composition, ed. R. F. Wimmer-Schweingruber, AIP Conf. Proc. 598, 153.
  • "Coronal Mass Ejections Associated with Impulsive Solar Energetic Particle Events," Kahler, S. W., Reames, D. V., and Sheeley, N. R., Jr. 2001, ApJ 562, 558.
  • "On the Phase of the 27-Day Modulation of Anomalous and Galactic Cosmic Rays at 1 AU during Solar Minimum," Reames, D. V., and Ng, C. K. 2001, ApJ (Letters) 563, L179.
  • "Magnetic Topology of Impulsive and Gradual Solar Energetic Particle Events," Reames, D. V. 2002, ApJ (Letters) 571, L63.
  • "Interacting Coronal Mass Ejections and Solar Energetic Particles," Gopalswamy, N., Yashiro, S., Michalek, G., Kaiser, M. L., Howard, R. A., Reames, D. V., Leske, R., and von Rosenvinge, T. 2002, ApJ (Letters) 572, L103.
  • "Energetic Particle Abundances as Probes of an Interplanetary Shock Wave, " Reames, D. V., and Tylka, A. J. 2002, ApJ (Letters) 575, L37.
  • "Angular Distributions of Fe/O from Wind: New Insights into SEP Transport, " Reames, D. V., and Ng, C. K. 2002 ApJ (Letters) 577, L59.
  • "Flare- and Shock-Accelerated Energetic Particles in the Solar Events of 2001 April 14 and 15," Tylka, A. J., Boberg, P. R., Cohen, C. M. S., Dietrich, W. F., MacLennan, C. G., Mason, G. M., Ng, C. K., and Reames, D. V. 2002, ApJ (Letters) 581, L119.
  • "Solar Energetic Particle Production by CME-Driven Shocks in Solar Fast-Wind Regions," Kahler, S. W. and Reames, D. V. 2003, ApJ 584, 1063.
  • " Wind Observations of Anomalous Cosmic Rays from Solar Minimum to Maximum, " Reames, D. V. and F. B. McDonald, 2003 Astrophys. J. (Letters) 586, L99
  • "Modeling Shock-Accelerated Solar Energetic Particles Coupled To Interplanetary Alfven Waves," Ng, C. K., Reames, D. V., and Tylka, A. J, 2003, ApJ 591, 461.
  • "Coronal Shocks and Solar Energetic Particles," Cliver, E. W., Kahler, S. W., and Reames, D. V. 2004 ApJ 605, 902.
  • "Solar Energetic Particle Variations" Reames, D. V. 2003, Adv. Space Res. 34 (No. 2) 381.
  • "Heavy-Element Abundances in Solar Energetic Particle Events," Reames, D. V., and Ng, C. K. 2004 ApJ 610, 510.
  • "Shock Geometry, Seed Populations, and the Origin of Variable Composition at High Energies in Large Graual Solar Particle Events," Tylka, A. J., Cohen, C. M. S., Dietrich, W. F., Lee, M. A., Maclennan, C. G., Mewaldt, R. A., Ng, C. K., and Reames, D. V. 2005, ApJ 625, 474.
  • "Solar Sources of Impulsive Solar Energetic Particle Events and Their Magnetic Field Connection to the Earth," Nitta, N. V., Reames, D. V., DeRosa, M. L., Liu, Y., Yashiro, S., and Gopalswamy, N. 2006, ApJ 650, 438.
  • "Bulk Flow Velocity and First-Order Anisotropy of Solar Energetic Particles Observed on the Wind Spacecraft: Overview of Three "Gradual " Particle Events," Tan, Lun C., Reames, Donald V., and Ng, Chee K. 2007, ApJ 661, 1297 (preprint DOI:10.1086/516626).
  • "Ion Anisotropy and High-Energy Variability of Large Solar Particle Events: A Comparative Study," Tan, Lun C., Reames, Donald V., and Ng, Chee K. 2008, ApJ 678, 1471.
  • "Shock Acceleration of Solar Energetic Protons: The First 10 Minutes, " Ng, C. K., & Reames, D. V., 2008, ApJ (Letters) 686, L123.
  • "Solar Release Times of Energetic Particles in Ground-Level Events " Reames, D. V. 2009 ApJ 693, 812.
  • "Anomalous Cosmic Rays as Probes of Magnetic Clouds," Reames, D. V., Kahler, S. W., & Tylka, A, J 2009, ApJ 700, L196.
  • "Observational Evidence on the Presence of an Outer Reflecting Boundary in Solar Energetic Particle Events," Tan, L. C., Reames, D. V., Ng. C. K., Saloniemi, O., & Wang, L., 2009 ApJ 701, 1753.
  • "Solar Energetic-Particle Release Times in Historic Ground-Level Events" Reames, D. V., 2009 ApJ 706, 844
  • "Remote Sensing of Magnetic-Cloud Topology," Reames, D. V., 2010 Solar Physics, 265, 187 DOI 10.1007/s11207-010-9527-2
  • "Unusual Time Histories of Galactic and Anomalous Cosmic Rays at 1 AU over the Deep Solar Minimum of Cycle 23/24," McDonald, F. B., Webber, W. R., and Reames, D. V., Geophys. Res. Letters 37, 18101
  • "A Multi-Spacecraft View of Solar-Energetic-Particle Onsets in the 1977 November 22 Event," Reames, D. V., & Lal, N., 2010 ApJ 723, 550
  • "Streaming-limited Intensities of Solar Energetic Particles on the Intensity Plateau," Reames, D. V., & Ng, C. K., 2010 ApJ 723, 1286
  • "What Causes Scatter-Free Transport of Non-Relativistic Solar Electrons?" Tan, L. C., Reames, D. V., Ng, C. K., Shao, X., and Wang, L. 2011 ApJ 728, 133
  • "Use of Incident and Reflected Solar Particle Beams to Trace the Topology of Magnetic Clouds," Tan, L. C., Malandraki, O. E., Reames, D. V., Ng, C. K., Wang, L., and Dorrian, G., 2012 ApJ 750, 146
  • "The Longitudinal Properties of a Solar Energetic Particle Event Investigated using Modern Solar Imaging," Rouillard, A. P., Sheeley, N. R. Jr., Tylka, A., Vourlidas, A., Ng, C. K., Rakowski, C, Cohen, C., Mewaldt, R., Mason, G., Reames, D., Savani, N. P., St Cyr, O.C., and Szabo, A., 2012, ApJ 752:44
  • "Spatial Distributions of Solar Energetic Particles in the Heliosphere," Reames, D. V., Ng, C. K., & Tylka, A. J. 2012, Solar Physics 285, 233.
  • "Solar Energetic Particles: Shock Acceleration and Transport through Self-Amplified Waves," Ng. C. K., Reames, D. V., & Tylka, A. J., 2012, in Physics of the Heliosphere: A 10 Year Retrospective, AIP Conf. Proc. 1436, 212; doi: 10.1063/1.4723610.
  • "The Composition of the Solar Corona, Solar Wind, and Solar Energetic Particles," Schmelz, J. T., Reames, D. V., von Steiger, R., & Basu, S., 2012, ApJ 755:33.
  • "Particle Energy Spectra at Traveling Interplanetary Shock Waves," Reames, D. V., 2012, ApJ, 757:93.
  • "The Two Sources of Solar Energetic Particles," Reames, D. V., 2013, Space Sci. Rev., DOI: 10.1007/s11214-013-9958-9 (Springerlink.com)
  • "Comparison between Path Lengths Traveled by Solar Electrons and Ions in Ground-Level Enhancement Events" Tan, L. C., Malandraki, O. E., Reames, D. V., Ng, C. K., Wang, L., Patsou, I. and Papaioannou, A. 2013, ApJ 768:68.
  • "Element Abundances in Solar Energetic Particles and the Solar Corona" Reames, D. V. 2014, Solar Physics 289:977.
  • "Correlation of Electron Path Lengths Observed in the Highly Wound Outer Region of Magnetic Clouds With the Slab Fraction of Magnetic Turbulence in the Dissipation Range," Tan, L. C., Reames, D. V., Ng, C. K., Shao, X., and Wang, L. 2014 ApJ 786, 122.
  • "Abundance Enhancements in Impulsive Solar Energetic-Particle Events with Associated Coronal Mass Ejections," Reames, D.V., Cliver, E.W., and Kahler, S. W., Solar Physics (in press). DOI: 10.1007/s11207-014-0547-1

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    This file was last modified on Friday, 02-May-2014 16:41:55 EDT