MAST and PET Publications

Atmospheric Losses of Radiation Belt Electrons, R. S. Selesnick, J. B. Blake, and R. A. Mewaldt, submitted to the Journal of Geophysical Research (2002).

Observations of Geomagnetic Cutoff Variations during Solar Energetic Particle Events and Implications for the Radiation Environment at the Space Station, R. A. Leske, R. A. Mewaldt, E. C. Stone, and T. T. von Rosenvinge, to be published in Journal of Geophysical Research (2002).

Fractionation of Solar Energetic Particles and Solar Wind According to First Ionization Potential, R. A. Mewaldt, C.M.S. Cohen, R. A. Leske, E. R. Christian, A. C. Cummings, E. C. Stone, T. T. von Rosenvinge, M. E. Wiedenbeck, Advances in Space Research, in press (2002).

Charge States of Iron Accelerated in a Hot Plasma. I. Formulation of Charge-Changing Processes, L. Kocharov, G.A. Kovlatsov, A.F. Barghouty, J. Tortsi, Astronomy & Astrophysics, submitted (2001).

Are Solar Energetic Particles an Accelerated Sample of Solar Wind? R. A. Mewaldt, C. M. S. Cohen, R. A. Leske, E. R. Christian, A. C. Cummings, E. C. Stone, T. T. von Rosenvinge, and M. E. Wiedenbeck, Proceedings of the 26th International Cosmic Ray Conference, (Hamburg), 8, 3132 (2001).

A Direct Measurement of the Geomagnetic Cutoff for Cosmic Rays at Space Station Latitudes" R. C. Ogliore, R. A. Mewaldt, R. A. Leske, E. C. Stone, and T. T. von Rosenvinge, ibid, 10, 4112 (2001).

High Energy Ionic Charge State Composition in Large Solar Energetic Particle Event, A. W. Labrador, R. A. Leske, R. A. Mewaldt, A. C. Cummings, E. C. Stone, and T. T. von Rosenvinge, ibid, 8, 3149, (2001).

Ionic States of Solar Energetic Particles using the Geomagnetic Method, R. A. Mewaldt, R. A. Leske, E. C. Stone, and T. T. von Rosenvinge, to be published in the SOHO/ACE Conference on Solar and Galactic Abundances, R. Wimmer-Schweingruber and P. Bochsler, editors, AIP Conference Proceedings #598, New, York, p. 171 (2001).

Charge States of Energetic Particles from Corotating Interaction Regions as Constraints on their Source", J. E. Mazur, G. M. Mason, and R. A. Mewaldt, Astrophysical Journal, in press (2001).

Simulation of Charge-Equilibration and Acceleration of Solar Energetic Ions, A. F. Barghouty and R. A. Mewaldt, in Acceleration and Transport of Energetic Particles Observed in the Heliosphere, R. A. Mewaldt, J. R. Jokipii, M. A, Lee, E. Moebius, and T.H. Zurbuchen, editors, AIP Conference Proceedings, #528, American Institute of Physics, p. 71 (2000).

Variable Fractionation of Solar Energetic Particles According to First Ionization Potential", R. A. Mewaldt, C. M. S. Cohen, R. A. Leske, E. R. Christian, A. C. Cummings, P. L. Slocum , E. C. Stone, T. T. von Rosenvinge, and M. E. Wiedenbeck, ibid, p. 123 (2000).

The Transition from Singly to Multiply-Charged Anomalous Cosmic Rays: Simulation and Interpretation of SAMPEX Observations, A. F. Barghouty, J. R. Jokipii, and R. A. Mewaldt, ibid, p. 337 (2000).

Statistical Analysis of the SAMPEX PET Proton Measurements, V. Pierrard, J. Lermaire, D. Heynderickx, M. Kruglanski, M. Looper, B. Blake, and R. Mewaldt, Nuclear Instruments and Methods in Physics Research A 449, 378 (2000).

Solar Cycle Dependence of the Geomagnetically Trapped Anomalous Cosmic Rays, R. S. Selesnick, A. C. Cummings, R. A. Leske, R. A. Mewaldt, E. C. Stone, and J. R. Cummings, Geophysical Research Letters, 26, 2349 (2000).

Argon and other Rare Elements in the 1-4 MeV/nucleon Trapped Anomalous Cosmic Ray Population, J. E. Mazur, G. M. Mason, J. B. Blake, M. D. Looper, R. A. Leske, and R. A. Mewaldt, to be published in Journal of Geophysical Research, (2000).

Simulation of the Charge States and Energy Spectra of Solar Energetic Iron, A. F. Barghouty and R. A. Mewaldt, Proceedings of the 26th International Cosmic Ray Conference (Salt Lake City, 6, 183 (1999).

Continuing SAMPEX Observations of Shock Injected Ultra-Relativistic Electrons, M. D. Looper, J. B. Blake, and R. A. Mewaldt, ibid, 6, 456 (1999).

"Re-Accelerated Solar Wind - A Source of Anomalous Cosmic Rays? R. A. Mewaldt, ibid, 7, 547 (1999).

Long Term Temporal Behavior of Interplanetary and Trapped Anomalous Cosmic Rays, R. A. Leske, R. A. Mewaldt, R. S. Selesnick, A. C. Cummings, T. T. von Rosenvinge, E. C. Stone, and M. E. Wiedenbeck, ibid, 7, 516 (1999).

Ionic Chare State Measurements of Solar Energetic Particles Using SAMPEX/MAST", D. J. Larson, R. A. Leske, R. A. Mewaldt, A. C. Cummings, T. T. von Rosenvinge, E. C. Stone, and M. E. Wiedenbeck, ibid, 7, 301 (1999).

Determining the Cutoff of Galactic Cosmic Rays Using the SAMPEX Satellite, Ryan Ogliore, Caltech Summer Undergraduate Research Fellowship (SURF) Report, 1999.

Charge States of Solar Energetic Particles Using the Geomagnetic Cutoff Technique: SAMPEX Measurements in the November 6, 1997, Solar Particle Event, J. E. Mazur, G. M. Mason, M. D. Looper, R. A. Leske, R. A. Mewaldt, Geophysical Research Letters, 26, 173 (1999).

Charge States of Solar Energetic Iron: Non-Equilibrium Calculation with Shock-Induced Acceleration, A. F. Barghouty, and R. A. Mewaldt, Ap. J. 520, L127, (1999).

Solar and Interplanetary Particles Re-Accelerated a the Solar Wind Termination Shock, R. A. Mewaldt, Advances in Space Research, 23, No. 3, p. 541, (1999).

Anomalous Cosmic Rays, B. Klecker, R. A. Mewaldt, J. W. Bieber, A. C. Cummings, L. Drury, J. Giacalone, J. R. Jokipii, F. C. Jones, M. B. Krainev, M. A. Lee, J. A. Le Roux, R. G. Marsden, F. B. McDonald, R. B. McKibben, C. D. Steenberg, M. G. Baring, D. C. Ellison, L. J. Lanzerotti, R. A. Leske,.J. E. Mazur, H. Moraal, M. Oetliker, V. S. Ptuskin, R. S. Selesnick, K. J. Trattner, Space Science Reviews 83, 259-308, (1998).

SAMPEX: NASA's First Small Explorer Satellite, G. M. Mason, D. N. Baker, J. B. Blake, R. E. Boughner, L. B. Callis, R. A. Leske, J. R. Cummings, D. C. Hamilton, D. Hovestadt, S. G. Kanekal, B. Klecker, X. Li, M. D. Looper, J. E. Mazur, R. A. Mewaldt, M. Oetliker, M. Scholer, R. S. Selesnick, E. C. Stone, T. T. von Rosenvinge, D. L. Williams, IEEE, 006 (1998).

Anomalous Cosmic Rays: Interstellar Interlopers in the Heliosphere and Magnetosphere, in "From the Sun - Auroras, Magnetic Storms, Solar Flares, Cosmic rays", S. T. Suess and B. T. Tsurutani, eds.American Geophysical Union, Washington D.C., p. 133, 1998.

Solar Energetic Particle Isotopic Composition, D. L. Williams, R. A. Leske, R. A. Mewaldt, and E. C. Stone, Space Science Reviews, 85, 379 (1998).

The Ionic Charge of Solar Energetic Particles with Energies of 0.3-70 MeV per Nucleon, M. Oetliker, B. Klecker, D. Hovestadt, G. M. Mason, J. E. Mazur, R. A. Leske, R. A. Mewaldt, J. B. Blake, M. D. Looper, Astrophysical Journal, 477:495-501 (1997).

Are Energetic Electrons in the Solar Wind the Source of the Outer Radiation Belt?, X. Li, D. N. Baker, M. Temerin, D. Larson, R. P. Lin, G. D. Reeves, M. Looper, S. G. Kanekal, R. A. Mewaldt, Geophysical Research Letters, 24, 923 (1997).

Multiply Charged Anomalous Cosmic Rays Above 15 MeV/nucleon, R. S. Selesnick, R. A. Mewaldt, J. R. Cummings, Proceedings of the 25th International Cosmic RayConference, 1997, 269 (1997).

Geomagnetic Cutoff Variations During Solar Energetic Particle Events - Implications for the Space Station, R. A. Leske, R. A. Mewaldt, E. C. Stone, T. T. von Rosenvinge, Proceedings of the 25th International Cosmic Ray Conference, 2, 381 (1997).

Geomagnetically Trapped Anomalous Cosmic Rays at Solar Minimum, R. S. Selesnick, R. A. Leske, R. A. Mewaldt, J. R. Cummings, Proceedings of the 25th International Cosmic Ray Conference, 2, 305 (1997).

Intensity Gradients of Anomalous Cosmic Ray Oxygen Throughout the Heliosphere, A. C. Cummings, E. C. Stone, B. Klecker, R. G. Marsden, R. A. Mewaldt, D. V. Reames, K. J. Trattner, T. T. von Rosenvinge, W. R. Webber, Proceedings of the 25th International Cosmic Ray Conference, 2, 257 (1997).

Updated Measurements of the Isotopic Composition of Interplanetary and Geomagnetically Trapped Anomalous Cosmic Rays, R. A. Leske, R. A. Mewaldt, A. C. Cummings, E. C. Stone, T. T. von Rosenvinge, Proceedings of the 25th International Cosmic Ray Conference, 2, 321 (1997).

A Study of the Composition and Energy Spectra of Anomalous Cosmic Rays Using the Geomagnetic Field, R. A. Mewaldt, J. R. Cummings R. A. Leske, R. S. Selesnick, E. C. Stone, and T. T. von Rosenvinge, Geophysical Research Letters, Vol.23, No.6, 617-620, (1996).

SAMPEX Observations of Energetic Hydrogen Isotopes in the Inner Zone, M. D. Looper, J. B. Blake, J. R. Cummings and R. A. Mewaldt, Radiation Measurements, Vol.26, No.6, 967-978, (1996).

The Isotopic Composition of Anomolous Cosmic Rays from SAMPEX , R. A. Leske, R. A. Mewaldt, A. C. Cummings, J. R. Cummings, E. C. Stone, T. T. von Rosenvinge, Space Science Reviews 78, 149-154, (1996).

Anomalous Cosmic Rays: A Sample of Interstellar Matter, R. A. Mewaldt, R. A. Leske, J. R. Cummings, Maryland Conference on Cosmic Abundances, edited by S. S. Holt and G. Sonneborn, Astronomy Society of the Pacific Conference Series, Vol. 99, 381-384, (1996).

Anomalous Cosmic Rays: The Principal Source of High Energy Ions in the Radiation Belts, R. A. Mewaldt, R. S. Selesnick and J. R. Cummings,  Radiation Belts: Models and Standards, American Geophysical Union, Geophysical Monograph 97,  p.35, (1996).

Precipitating Relativistic Electrons: Evidence for Effects on Mesospheric Odd Nitrogen, L. B. Callis, R. E. Boughner, D. N. Baker, R. A. Mewaldt, J. B. Blake, R. S. Selesnick, J. R. Cummings and M. Natarajan, Geophysical Research Letters 15, p.1901, (1996).

Modelling He and H Isotopes in the Radiation Belts, R. S. Selesnick, R. A. Mewaldt,  Radiation Belts: Models and Standards, American Geophysical Union, Geophysical Monograph 97,  p.123, (1996).

Jovian, Solar, and Other Possible Sources of Radiation Belt Particles, D. N. Baker, S. G. Kanekal, M. D. Looper, J. B. Blake and R. A. Mewaldt, Radiation Belts: Models and Standards, American Geophysical Union, Geophysical Monograph 97,  p.123, (1996).

Anomalous Cosmic Ray Studies Using the Geomagnetic Field, R. A. Mewaldt, J. R. Cummings, R. A. Leske, R. S. Selesnick and E. C. Stone, Proceeding 8th Solar Wind Conference, p.621, (1995).

Measurements of the Ionic Charge States of Solar Energetic Particles Using the Geomagnetic Field, R. A. Leske, J. R. Cummings, R. A. Mewaldt, E. C. Stone and T. T. von Rosenvinge. Astrophysical Journal 452, p. L149 (1995).

Charge State Measurements of Solar Energetic Particles Observed with SAMPEX, G. M. Mason, J. E. Mazur, M. D. Looper, R. A. Mewaldt,Astrophysical Journal 452, p. 901, (1995).

Observations of Anomalous Cosmic Rays in the Heliosphere from the SAMPEX, Ulysses, Voyager, and Pioneer Spacecraft, A. C. Cummings, J. R. Cummings, R. A. Mewaldt, E. C. Stone, B. Blake, M. Fraenz, B. Klecker, B. Hovestadt, and W. R. Webber. Advances in Space Research 16, p. 337, (1995).

Anomalous Cosmic Ray Gradients Throughout the Heliosphere, A. C. Cummings, R. A. Mewaldt, J. B. Blake, J. R. Cummings, M. Franz, D. Hovestadt, B. Klecker, G. M. Mason, J. E. Mazur, E. C. Stone, T. T. von Rosenvinge and W. R. Webber. Geophysical Research Letters, 22, p. 341, (1995).

Geomagnetically Trapped Anomalous Cosmic Rays, R. S. Selesnick, A. C. Cummings, J. R. Cummings, R. A. Mewaldt, and E. C. Stone. Journal of Geophysical Research, 100, p. 9503, (1995).

New Magnetospheric Results from the SAMPEX Mission, D.N. Baker, J.B. Blake, L.B. Callis, J.R. Cummings, D. Hosestadt, S. Kanekal, B.  Klecker, R.A. Mewaldt and R. Nakamura, Proceedings of the Taos Workshop on the Earth's Trapped Particle Environment, (1994).

Observations of the Remnants of the Ultrarelativistic Electrons Injected by the Strong SSC of 24 March 1991, M. D. Looper, J. B. Blake, R. A. Mewaldt, J. R. Cummings, and D. N. Baker. Geophysical Research Letters 21, p. 2079, (1994).

Relativistic Electron Acceleration and Decay Time Scales in the Inner and Outer Radiation Belts: SAMPEX, D. N. Baker, J. B. Blake, L. B. Callis, J. R. Cummings, D. Hovestadt, S. Kanekal, B. Klecker, R. A. Mewaldt, R. D. Zwickl. Geophysical Research Letters 21, p. 409 (1994).

Anomalous Cosmic Rays: Interstellar Interlopers in the Heliosphere and Magnetosphere, R.A. Mewaldt, A.C. Cummings, and E.C. Stone, EOS Transactions AGU, Vol. 75, No. 6, pages 185 and 193, 1994.

SAMPEX Measurements of Heavy Ions Trapped in the Magnetosphere, A. C. Cummings, J. R. Cummings, R. A. Mewaldt, R. S. Selesnick, E. C. Stone, T. von Rosenvinge, J. B. Blake. IEEE Transactions on Nuclear Science 40, p. 1458 (1993).

Coronal Abundances of Neon and Magnesium Isotopes from Solar Energetic Particles, R. S. Selesnick, A. C. Cummings, J. R. Cummings, R. A. Leske, R. A. Mewaldt, E. C. Stone, T. von Rosenvinge. Astrophysical Journal Letters 418, p. L45 (1993).

The Return of the Anomalous Cosmic Rays to 1 AU in 1992, R. A. Mewaldt, A. C. Cummings, J. R. Cummings, E.C. Stone, B. Klecker, D. Hovestadt, M. Scholer, G. M. Mason, J. E. Mazur D.C. Hamilton, T. von Rosenvinge, J. B. Blake. Geophysical Research Letters, 20, p. 2263 (1993).

New Evidence for Geomagnetically Trapped Anomalous Cosmic Rays, J. R. Cummings, A. C. Cummings, R. A. Mewaldt, R. S. Selesnick, E. C. Stone, T. T. von Rosenvinge. Geophysical Research Letters, 20, p. 2003 (1993).

PET: A Proton/Electron Telescope for Studies of Magnetospheric, Solar, and Galactic Particles., W. R. Cook, A. C. Cummings, J. R. Cummings, T. L. Garrard, B. Kecman, R. A. Mewaldt, R. S. Selesnick, E. C Stone, D. N. Baker, T. T. von Rosenvinge, J. B. Blake, L. B. Callis. IEEE Transactions on Geoscience and Remote Sensing 31, p. 565 (1993).

MAST: A Mass Spectrometer Telescope for Studies of the Isotopic Composition of Solar, Anomalous, and Galactic Cosmic Ray Nuclei., W. R. Cook, A. C. Cummings, J. R. Cummings, T. L. Garrard, B. Kecman, R. A. Mewaldt, R. S. Selesnick, E. C. Stone. IEEE Transactions on Geoscience and Remote Sensing, 31, p. 557 (1993).