Donald Reames

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Donald Reames

  • EMERITUS
  • 301.286.6454 | 301.286.1215
  • NASA/GSFC
  • Mail Code: 661
  • GREENBELT , MD 20771
  • Employer: EMERITUS
  • Brief Bio

    Don Reames received his A. B. and Ph. D. degrees in physics from the University of California at Berkeley in 1958 and 1964, respectively. He applied this early background in nuclear physics to his work in experimental astrophysics at Goddard Space Flight Center since 1964. His early work involved the S9 Cosmic Ray Experiment flown on the Gemini XI mission and sounding rockets flown from Ft. Churchill. He subsequently worked with experiments on the ISEE-3, IMP-8, Helios 1 and 2, and Wind spacecraft. As a Co-I on the EPACT experiment on the Wind spacecraft, he was responsible for the design and con-struction of the Low Energy Matrix Telescope (LEMT). He is also a Co-I on IMPACT experiment for the STEREO mission. He has studied the physics of particle acceleration in a variety of sites throughout the heliosphere and the relationship of these particles to solar flares, shock waves, CMEs and to the radio, X-ray, and gamma-ray emission that they particles produce. This work has resulted in over 100 papers in the refereed scientific literature. Don Reames retired from the Civil Service in 2003 to continue in an Emeritus position at Goddard. In 2007 he joined the Institute for Physical Science and Technology at the University of Maryland, College Park, MD where he is a Senior Research Scientist.

    Research Interests

    Astrophysics

    Astrophysics of energetic-particle acceleration at the Sun, in the heliosphere and in the galaxy and of the secondary X-rays, gamma-rays and radio emission those particles produce. Design of particle telescopes and the related data acquisition and analysis systems.

    Current Projects

    Energetic Particles Acceleration Composition and Transport (EPACT) Experiment on the Wind Spacecraft

    Education

    1964 - PhD. - Physics, U. of California, Berkeley

    1958 - A.B. - Physics, U. of California, Berkeley

    Publications

    Refereed

    Tan, L., D. Reames, C. Ng, X. Shao, and L. Wang. 2011. "What Causes Scatter-Free Transport of Non-Relativistic Solar Electrons?" ApJ, 728: 133.

    Reames, D. 2010. "Remote Sensing of Magnetic-Cloud Topology." Solar Physics, 265: 187 [ 10.1007/s11207-010-9527-2]

    McDonald, F., W. Webber, and D. Reames. 2010. "Unusual Time Histories of Galactic and Anomalous Cosmic Rays at 1 AU over the Deep Solar Minimum of Cycle 23/24." Geophys Res Letters, 37: 18101.

    Reames, D., and N. Lal. 2010. "A Multi-Spacecraft View of Solar-Energetic-Particle Onsets in the 1977 November 22 Event." ApJ, 723: 550.

    Reames, D., and C. Ng. 2010. "Streaming-limited Intensities of Solar Energetic Particles on the Intensity Plateau." ApJ, 722: 1286.

    Reames, D. 2009. "Solar Energetic-Particle Release Times in Historic Ground-Level Events." ApJ, 706: 844.

    Reames, D., S. Kahler, and A. Tylka. 2009. "Anomalous Cosmic Rays as Probes of Magnetic Clouds." ApJ Letters, 700: L196.

    Tan, L., D. Reames, C. K. Ng, O. Saloniemi, and L. Wang. 2009. "Observational Evidence on the Presence of an Outer Reflecting Boundary in Solar Energetic Particle Events." ApJ, 701: 1753.

    Reames, D. 2009. "Solar Energetic-Particle Release Times in Historic Ground-Level Events." ApJ, 706: 844-850 [10.1088/0004-637X/706/1/844]

    Reames, D. 2009. "Solar Release Times of Energetic Particles in Ground-Level Events." ApJ, 693: 812.

    von Rosenvinge, T., I. Richardson, D. Reames, et al. C. Cohen, A. Cummings, R. Leske, R. Mewaldt, E. Stone, and M. Wiedenbeck. 2009. "The Solar Energetic Particle Event of December 14, 2006." Solar Physics, 256: 443.

    Tan, L., D. Reames, and C. Ng. 2008. "Ion Anisotropy and High-Energy Variability of Large Solar Particle Events: A Comparative Study." ApJ, 678: 1471.

    von Rosenvinge, T., D. Reames, R. Baker, et al. J. Hawk, J. Nolan, L. Ryan, S. Shuman, K. Wortman, R. Mewaldt, A. Cummings, W. Cook, A. Labrador, R. Leske, and M. Wiedenbeck. 2008. "The High Energy Telescope for STEREO." Space Science Revs, 136: 391.

    Ng, C., and D. Reames. 2008. "Shock Acceleration of Solar Energetic Protons: The First 10 Minutes." ApJ Letters, 686: L123.

    Aschwanden, M., L. Burlaga, M. Kaiser, et al. C. Ng, D. Reames, M. Reiner, T. Gombosi, N. Lugaz, W. Manchester, I. Roussev, T. Zurbuchen, C. Farrugia, A. Galvin, M. Lee, J. Linker, Z. Mikic, P. Riley, D. Alexander, A. Sandman, J. Cook, R. Howard, D. Odstrcil, V. Pizzo, J. Kóta, P. Liewer, J. Luhmann, B. Inhester, R. Schwenn, S. Solanki, V. Vasyliunas, T. Wiegelmann, L. Blush, P. Bochsler, I. Cairns, P. Robinson, V. Bothmer, K. Kecskemety, A. Llebaria, M. Maksimovic, M. Scholer, and R. Wimmer-Schweingruber. 2006. "Theoretical Modeling for the Stereo Mission." Space Science Revs, 136: 565.

    Tylka, A., C. Cohen, W. Dietrich, et al. M. Lee, C. Maclennan, R. Mewaldt, C. Ng, and D. Reames. 2006. "A Comparative Study of Ion Characteristics in the Large Gradual Solar Energetic Particle Events of 2002 April 21 and 2002 August 24." ApJ Suppl, 164: 536.

    Tylka, A., C. Cohen, W. Dietrich, et al. M. Lee, C. Maclennan, R. Mewaldt, C. Ng, and D. Reames. 2005. "Shock Geometry, Seed Populations, and the Origin of Variable Composition at High Energies in Large Graual Solar Particle Events." ApJ, 625: 474.

    Luhmann, J., D. Curtis, R. Lin, et al. D. Larson, P. Schroeder, A. Cummings, R. Mewaldt, E. Stone, A. Davis, T. von Rosenvinge, M. Acuna, D. Reames, C. Ng, K. Ogilvie, R. Mueller-Mellin, H. Kunow, G. Mason, M. Wiedenbeck, A. Sauvaud, C. Aoustin, P. Louarn, J. Dandouras, A. Korth, V. Bothmer, V. Vasyliunas, T. Sanderson, R. Marsden, C. Russell, J. Gosling, J. Bougeret, D. McComas, J. Linker, P. Riley, D. Odstrcil, V. Pizzo, T. Gombosi, D. Dezeeuw, and K. Kecskemety. 2005. "IMPACT: Science goals and firsts with STEREO." Adv Space Res, 36: 1534.

    Cliver, E., S. Kahler, and D. Reames. 2004. "Coronal Shocks and Solar Energetic Particles." ApJ, 605: 902.

    Reames, D. 2004. "Solar Energetic Particle Variations." Adv Space Res, 34 (2): 381.

    Reames, D., and C. Ng. 2004. "Heavy-Element Abundances in Solar Energetic Particle Events." ApJ, 610: 510.

    Kahler, S., and D. Reames. 2003. "Solar Energetic Particle Production by CME-Driven Shocks in Solar Fast-Wind Regions." ApJ, 584: 1063-1070.

    Reames, D., and F. McDonald. 2003. "Wind Observations of Anomalous Cosmic Rays from Solar Minimum to Maximum." Astrophys J Letters, 586: L99.

    Ng, C., D. Reames, and A. Tylka. 2003. "Modeling Shock-Accelerated Solar Energetic Particles Coupled To Interplanetary Alfvén Waves." ApJ, 591: 461.

    Berdichevsky, D., C. Farrugia, B. Thompson, et al. R. Lepping, D. Reames, M. Kaiser, J. Steinberg, S. Plunkett, and D. Michels. 2002. "Halo-Coronal Mass Ejections near the 23rd Solar Minimum: Lift-off, Inner Heliosphere, and in Situ Signatures." Annales Geophysicae, 20: 891.

    Reames, D., and A. Tylka. 2002. "Energetic Particle Abundances as Probes of an Interplanetary Shock Wave." ApJ (Letters), 575: L37.

    Reames, D., and C. Ng. 2002. "Angular Distributions of Fe/O from Wind: New Insights into SEP Transport." ApJ (Letters), 577: L59.

    Tylka, A., P. Boberg, C. Cohen, et al. W. Dietrich, C. MacLennan, G. Mason, C. Ng, and D. Reames. 2002. "Flare- and Shock-Accelerated Energetic Particles in the Solar Events of 2001 April 14 and 15." ApJ (Letters), 581: L119.

    Reames, D. 2002. "Magnetic Topology of Impulsive and Gradual Solar Energetic Particle Events." ApJ (Letters), 571: L63.

    McDonald, F., B. Klecker, R. McGuire, and D. Reames. 2001. "The Relative Recovery of Galactic and Anomalous Cosmic Rays at 1 AU: Further Evidence for Modulation in the Heliosheath." JGR, 107 (A8): [ 10.1029/2001JA000206]

    Reames, D., C. Ng, and D. Berdichevsky. 2001. "Angular Distributions of Solar Energetic Particles." Ap J, 550: 1064.

    Tylka, A., C. Cohen, W. Dietrich, et al. C. Maclennan, R. E. Mcguire, C. K. No, and D. Reames. 2001. "Evidence for Remnant Flare Suprathermals in the Source Population of Solar Energetic Particles in the 2000 Bastile Day Event." ApJ (Letters), 558: L59.

    Kahler, S., D. Reames, and N. Sheeley Jr. 2001. "Coronal Mass Ejections Associated with Impulsive Solar Energetic Particle Events." ApJ, 562: 558.

    Reames, D., and C. Ng. 2001. "On the Phase of the 27-Day Modulation of Anomalous and Galactic Cosmic Rays at 1 AU during Solar Minimum." ApJ (Letters), 563: L179.

    Lepping, D., D. Lepping, L. Burlaga, et al. A. Lazarus, J. Kasper, D. Desch, D. Desch, C. Wu, D. Reames, H. Singer, C. Smith, and K. Ackerson. 2001. "The Bastille Day Magnetic Clouds and Upstream Shocks: Near Earth Interplanetary Observations." Solar Physics, 204: 287.

    Reames, D., and A. nd Tylka. 2001. "Heavy Ion Abundances and Spectra and the Large Gradual Solar Energetic Particle Event of 2000 July 14." ApJ (Letters) 548, L233.:

    Reames, D., C. Ng, and A. Tylka. 2000. "Initial Time Dependence of Abundances in Solar Particle Events." ApJ Letters, 531: L83.

    Berdichevsky, D., I. Richardson, B. Thompson, et al. D. Reames, R. MacDowall, S. Plunkett, D. Michels, M. Kaiser, R. Lepping, K. Ogilvie, and R. Stone. 2000. "Examples of Fast Solar Wind Transients, Their Sources and the Forecast of Possible Geomagnetic Impact." Geofisica Internacional, 39: 5.

    Reames, D. 2000. "Abundances of Trans-Iron Elements in Solar Energetic Particle Events." ApJ (Letters), 540: L111.

    Tylka, A., D. Reames, and C. Ng. 1999. "Observations of Systematic Temporal Evolution in Elemental Composition During Gradual Solar Energetic Particle Events." Geophys Res Letters, 26: 2141.

    Ng, C., D. Reames, and A. Tylka. 1999. "Effect of Proton-Amplified Waves on the Evolution of Solar Energetic Particle Composition in Gradual Events." Geophys Res Letters, 26: 2145.

    Reames, D. 1999. "Particle Acceleration at the Sun and in the Heliosphere." Space Science Revs, 90: 413.

    Reames, D., C. Ng, and A. Tylka. 1999. "Energy-Dependent Ionization States of Shock-Accelerated Particles in the Solar Corona." Geophys Res Letters, 26: 3585.

    Reames, D. 1999. "Quiet-time Spectra and Abundances of Energetic Particles during the 1996 Solar Minimum." Astrophys J, 518: 473.

    Reames, D. 1999. "Solar Energetic Particles: Is There Time to Hide?" Radiation Measurements, 30 (3): 297.

    Brief Bio

    Don Reames received his A. B. and Ph. D. degrees in physics from the University of California at Berkeley in 1958 and 1964, respectively. He applied this early background in nuclear physics to his work in experimental astrophysics at Goddard Space Flight Center since 1964. His early work involved the S9 Cosmic Ray Experiment flown on the Gemini XI mission and sounding rockets flown from Ft. Churchill. He subsequently worked with experiments on the ISEE-3, IMP-8, Helios 1 and 2, and Wind spacecraft. As a Co-I on the EPACT experiment on the Wind spacecraft, he was responsible for the design and con-struction of the Low Energy Matrix Telescope (LEMT). He is also a Co-I on IMPACT experiment for the STEREO mission. He has studied the physics of particle acceleration in a variety of sites throughout the heliosphere and the relationship of these particles to solar flares, shock waves, CMEs and to the radio, X-ray, and gamma-ray emission that they particles produce. This work has resulted in over 100 papers in the refereed scientific literature. Don Reames retired from the Civil Service in 2003 to continue in an Emeritus position at Goddard. In 2007 he joined the Institute for Physical Science and Technology at the University of Maryland, College Park, MD where he is a Senior Research Scientist.

    Publications

    Refereed

    Tan, L., D. Reames, C. Ng, X. Shao, and L. Wang. 2011. "What Causes Scatter-Free Transport of Non-Relativistic Solar Electrons?" ApJ 728 133

    Reames, D. 2010. "Remote Sensing of Magnetic-Cloud Topology." Solar Physics 265 187 [ 10.1007/s11207-010-9527-2]

    McDonald, F., W. Webber, and D. Reames. 2010. "Unusual Time Histories of Galactic and Anomalous Cosmic Rays at 1 AU over the Deep Solar Minimum of Cycle 23/24." Geophys Res Letters 37 18101

    Reames, D., and N. Lal. 2010. "A Multi-Spacecraft View of Solar-Energetic-Particle Onsets in the 1977 November 22 Event." ApJ 723 550

    Reames, D., and C. Ng. 2010. "Streaming-limited Intensities of Solar Energetic Particles on the Intensity Plateau." ApJ 722 1286

    Reames, D. 2009. "Solar Energetic-Particle Release Times in Historic Ground-Level Events." ApJ 706 844.

    Reames, D., S. Kahler, and A. Tylka. 2009. "Anomalous Cosmic Rays as Probes of Magnetic Clouds." ApJ Letters 700 L196.

    Tan, L., D. Reames, C. K. Ng, O. Saloniemi, and L. Wang. 2009. "Observational Evidence on the Presence of an Outer Reflecting Boundary in Solar Energetic Particle Events." ApJ 701 1753

    Reames, D. 2009. "Solar Energetic-Particle Release Times in Historic Ground-Level Events." ApJ 706 844-850 [10.1088/0004-637X/706/1/844]

    Reames, D. 2009. "Solar Release Times of Energetic Particles in Ground-Level Events." ApJ 693 812.

    von Rosenvinge, T., I. Richardson, D. Reames, et al. C. Cohen, A. Cummings, R. Leske, R. Mewaldt, E. Stone, and M. Wiedenbeck. 2009. "The Solar Energetic Particle Event of December 14, 2006." Solar Physics 256 443.

    Tan, L., D. Reames, and C. Ng. 2008. "Ion Anisotropy and High-Energy Variability of Large Solar Particle Events: A Comparative Study." ApJ 678 1471.

    von Rosenvinge, T., D. Reames, R. Baker, et al. J. Hawk, J. Nolan, L. Ryan, S. Shuman, K. Wortman, R. Mewaldt, A. Cummings, W. Cook, A. Labrador, R. Leske, and M. Wiedenbeck. 2008. "The High Energy Telescope for STEREO." Space Science Revs 136 391.

    Ng, C., and D. Reames. 2008. "Shock Acceleration of Solar Energetic Protons: The First 10 Minutes." ApJ Letters 686 L123.

    Aschwanden, M., L. Burlaga, M. Kaiser, et al. C. Ng, D. Reames, M. Reiner, T. Gombosi, N. Lugaz, W. Manchester, I. Roussev, T. Zurbuchen, C. Farrugia, A. Galvin, M. Lee, J. Linker, Z. Mikic, P. Riley, D. Alexander, A. Sandman, J. Cook, R. Howard, D. Odstrcil, V. Pizzo, J. Kóta, P. Liewer, J. Luhmann, B. Inhester, R. Schwenn, S. Solanki, V. Vasyliunas, T. Wiegelmann, L. Blush, P. Bochsler, I. Cairns, P. Robinson, V. Bothmer, K. Kecskemety, A. Llebaria, M. Maksimovic, M. Scholer, and R. Wimmer-Schweingruber. 2006. "Theoretical Modeling for the Stereo Mission." Space Science Revs 136 565.

    Tylka, A., C. Cohen, W. Dietrich, et al. M. Lee, C. Maclennan, R. Mewaldt, C. Ng, and D. Reames. 2006. "A Comparative Study of Ion Characteristics in the Large Gradual Solar Energetic Particle Events of 2002 April 21 and 2002 August 24." ApJ Suppl 164 536.

    Tylka, A., C. Cohen, W. Dietrich, et al. M. Lee, C. Maclennan, R. Mewaldt, C. Ng, and D. Reames. 2005. "Shock Geometry, Seed Populations, and the Origin of Variable Composition at High Energies in Large Graual Solar Particle Events." ApJ 625 474.

    Luhmann, J., D. Curtis, R. Lin, et al. D. Larson, P. Schroeder, A. Cummings, R. Mewaldt, E. Stone, A. Davis, T. von Rosenvinge, M. Acuna, D. Reames, C. Ng, K. Ogilvie, R. Mueller-Mellin, H. Kunow, G. Mason, M. Wiedenbeck, A. Sauvaud, C. Aoustin, P. Louarn, J. Dandouras, A. Korth, V. Bothmer, V. Vasyliunas, T. Sanderson, R. Marsden, C. Russell, J. Gosling, J. Bougeret, D. McComas, J. Linker, P. Riley, D. Odstrcil, V. Pizzo, T. Gombosi, D. Dezeeuw, and K. Kecskemety. 2005. "IMPACT: Science goals and firsts with STEREO." Adv Space Res 36 1534.

    Cliver, E., S. Kahler, and D. Reames. 2004. "Coronal Shocks and Solar Energetic Particles." ApJ 605 902.

    Reames, D. 2004. "Solar Energetic Particle Variations." Adv Space Res 34 (2): 381.

    Reames, D., and C. Ng. 2004. "Heavy-Element Abundances in Solar Energetic Particle Events." ApJ 610 510.

    Kahler, S., and D. Reames. 2003. "Solar Energetic Particle Production by CME-Driven Shocks in Solar Fast-Wind Regions." ApJ 584 1063-1070

    Reames, D., and F. McDonald. 2003. "Wind Observations of Anomalous Cosmic Rays from Solar Minimum to Maximum." Astrophys J Letters 586 L99.

    Ng, C., D. Reames, and A. Tylka. 2003. "Modeling Shock-Accelerated Solar Energetic Particles Coupled To Interplanetary Alfvén Waves." ApJ 591 461.

    Berdichevsky, D., C. Farrugia, B. Thompson, et al. R. Lepping, D. Reames, M. Kaiser, J. Steinberg, S. Plunkett, and D. Michels. 2002. "Halo-Coronal Mass Ejections near the 23rd Solar Minimum: Lift-off, Inner Heliosphere, and in Situ Signatures." Annales Geophysicae 20 891.

    Reames, D., and A. Tylka. 2002. "Energetic Particle Abundances as Probes of an Interplanetary Shock Wave." ApJ (Letters) 575 L37.

    Reames, D., and C. Ng. 2002. "Angular Distributions of Fe/O from Wind: New Insights into SEP Transport." ApJ (Letters) 577 L59.

    Tylka, A., P. Boberg, C. Cohen, et al. W. Dietrich, C. MacLennan, G. Mason, C. Ng, and D. Reames. 2002. "Flare- and Shock-Accelerated Energetic Particles in the Solar Events of 2001 April 14 and 15." ApJ (Letters) 581 L119.

    Reames, D. 2002. "Magnetic Topology of Impulsive and Gradual Solar Energetic Particle Events." ApJ (Letters) 571 L63.

    McDonald, F., B. Klecker, R. McGuire, and D. Reames. 2001. "The Relative Recovery of Galactic and Anomalous Cosmic Rays at 1 AU: Further Evidence for Modulation in the Heliosheath." JGR 107 (A8): [ 10.1029/2001JA000206]

    Reames, D., C. Ng, and D. Berdichevsky. 2001. "Angular Distributions of Solar Energetic Particles." Ap J 550 1064.

    Tylka, A., C. Cohen, W. Dietrich, et al. C. Maclennan, R. E. Mcguire, C. K. No, and D. Reames. 2001. "Evidence for Remnant Flare Suprathermals in the Source Population of Solar Energetic Particles in the 2000 Bastile Day Event." ApJ (Letters) 558 L59

    Kahler, S., D. Reames, and N. Sheeley Jr. 2001. "Coronal Mass Ejections Associated with Impulsive Solar Energetic Particle Events." ApJ 562 558.

    Reames, D., and C. Ng. 2001. "On the Phase of the 27-Day Modulation of Anomalous and Galactic Cosmic Rays at 1 AU during Solar Minimum." ApJ (Letters) 563 L179.

    Lepping, D., D. Lepping, L. Burlaga, et al. A. Lazarus, J. Kasper, D. Desch, D. Desch, C. Wu, D. Reames, H. Singer, C. Smith, and K. Ackerson. 2001. "The Bastille Day Magnetic Clouds and Upstream Shocks: Near Earth Interplanetary Observations." Solar Physics 204 287.

    Reames, D., and A. nd Tylka. 2001. "Heavy Ion Abundances and Spectra and the Large Gradual Solar Energetic Particle Event of 2000 July 14." ApJ (Letters) 548 L233.

    Reames, D., C. Ng, and A. Tylka. 2000. "Initial Time Dependence of Abundances in Solar Particle Events." ApJ Letters 531 L83.

    Berdichevsky, D., I. Richardson, B. Thompson, et al. D. Reames, R. MacDowall, S. Plunkett, D. Michels, M. Kaiser, R. Lepping, K. Ogilvie, and R. Stone. 2000. "Examples of Fast Solar Wind Transients, Their Sources and the Forecast of Possible Geomagnetic Impact." Geofisica Internacional 39 5.

    Reames, D. 2000. "Abundances of Trans-Iron Elements in Solar Energetic Particle Events." ApJ (Letters) 540 L111

    Tylka, A., D. Reames, and C. Ng. 1999. "Observations of Systematic Temporal Evolution in Elemental Composition During Gradual Solar Energetic Particle Events." Geophys Res Letters 26 2141.

    Ng, C., D. Reames, and A. Tylka. 1999. "Effect of Proton-Amplified Waves on the Evolution of Solar Energetic Particle Composition in Gradual Events." Geophys Res Letters 26 2145.

    Reames, D. 1999. "Particle Acceleration at the Sun and in the Heliosphere." Space Science Revs 90 413.

    Reames, D., C. Ng, and A. Tylka. 1999. "Energy-Dependent Ionization States of Shock-Accelerated Particles in the Solar Corona." Geophys Res Letters 26 3585.

    Reames, D. 1999. "Quiet-time Spectra and Abundances of Energetic Particles during the 1996 Solar Minimum." Astrophys J 518 473.

    Reames, D. 1999. "Solar Energetic Particles: Is There Time to Hide?" Radiation Measurements 30 (3): 297.

                                                                                                                                                                                            
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