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Maha Ashour-Abdalla

Roger Gendrin's Everlasting Impact on the Study of Wave Particle Interactions. Maha Ashour-Abdalla. Institute of Geophysics and Planetary Physics, and Department of Physics and Astronomy, University of California at Los Angeles. 2008 Roger Gendrin Memorial.

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Maha Ashour-Abdalla

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  1. Roger Gendrin's Everlasting Impact on the Study of Wave Particle Interactions Maha Ashour-Abdalla Institute of Geophysics and Planetary Physics, and Department of Physics and Astronomy, University of California at Los Angeles 2008 Roger Gendrin Memorial

  2. Journal of Atmospheric and Terrestrial Physics, 1968,Vol.30, pp. 1313-1330

  3. Gendrin, 1968

  4. Alain and Jacques were in London 1970 … Alain Roux Jacques Solomon

  5. … I met Roger in 1971 … … and joined Roger’s group at CNET in 1972

  6. Roger’s group … R. Gendrin, A. Meyer, R. Riguet, J. Etcheto in Kerguelen Islands N. Cornilleau, J. Solomon, S. Perrault

  7. Georges Laurent

  8. GEOS Geostationary European Orbiting Satellite S300 Electromagnetic study PI: R. Gendrin, On-board experiments The general aim of S300 experiment is to study electromagnetic waves in a frequency range a few hundredths of Hz up to 77 kHz (for electric fields) and 10 kHz (for magnetic fields). In addition, the parameters of local plasma will be measured through a study of its resonances by transmitting and receiving waves in the same frequency range. D. Jones, Introduction to the S-300 wave experiment onboard GEOS Space Science Reviews, 22, 327-332, 1978.

  9. GEOS: The first Geostationary European Satellite…

  10. GEOS Geostationary European Orbiting Satellite In the 1970’s Roger played a key role in the GEOS spacecraft by taking the lead of the wave consortium. GEOS-1: Launched on 20 April 1977 (lasted until 23 June 1978). Apogee & Perigee: 38000 km and 2050 km. GEOS-2: Launched on 14 July 1978 (lasted until January 1983). Geostationary orbit.

  11. GEOS-2 launched on July 14, 1978

  12. Roux et al., 1982

  13. GEOS Discovery of He+ Inspired two fundamental questions: 1) How the wave dispersion relation is affected by the presence of Helium?  include heavy ions, e.g., He+ into the linear dispersion relation 2) How do the observed waves affect the helium in terms of acceleration and heating?  carry out non-linear study, i.e., simulations

  14. Linear Dispersion Relation with He+ Gendrin et al., 1984

  15. R. Gendrin, B. Lembege, J. Dawson, J. Brackbill

  16. Heating of Thermal He+: A Simulation Study Omura, Ashour-Abdalla, Gendrin and Quest, 1985 Y. Omura

  17. Heating of Thermal He+: A Simulation Study Omura, Ashour-Abdalla, Gendrin and Quest, 1985

  18. "Once we set out on a voyage in the ocean, we never change the name of the ship" (Roger Gendrin, in response to a Yoshi Omura’s request the order of the authors for this Reply be changed)n Journal of Geophysical Research, 1985,Vol.91, No. A4, pp. 4593

  19. Viking was launched February 22, 1986 It investigated plasma processes in the auroral zone and high altitude ionosphere.

  20. Freja was launched October 6, 1992 Freja was designed to image the aurora and measure particles and fields in the upper ionosphere.

  21. Galileo was launched on October 18, 1989 and was the first orbiter of Jupiter It studied the atmosphere of Jupiter, its moons, and their interaction with the Jovian magnetosphere.

  22. Ulysses was launched on October 6, 1990 Its primary mission is to study the Sun and its heliosphere.

  23. Launched on October 15, 1997, Cassini-Huygens entered into orbit around Saturn on July 1, 2004 Cassini-Huygens is a NASA-ESA collaboration to study Saturn and its moons, in particular Titan.

  24. The Cluster spacecraft were launched in 2000 The four spacecraft are providing a detailed three-dimensional map of the magnetosphere.

  25. Cluster-1 Observations of Waves and Ions E field B field Ion energy Ion distributions February 14, 2001

  26. Electrostatic Wave Energy Time History Simulated and Observed Wave Spectrum SIMULATION SIMULATION STAFF OBSERVATIONS Strong wave growth occurs with saturation at about 8000 pet Comparison of simulated wave power spectra with observed waves

  27. New Paradigm for Studying Wave-Particle Interactions Identify Scientific Question Observations Analytical Theory Simulations Study Non-Linear Properties of the Plasma Study Linear Plasma Properties with Observed Parameters

  28. Review Papers • Gendrin, R., (1975), Waves and wave-particle interactions in the magnetosphere: A review, Space Science Reviews,18, 2, 145. • Gendrin, R. (1981), General relationships between wave amplification and particle diffusion in a magnetoplasma, Reviews of Geophysics and Space Physics, 19, 1, 171. • Gendrin, R. (1983), Wave particle interactions as an energy transfer mechanism between different particle species, Space Science Reviews, 34, 3, 271. • Gendrin, R. (1985), Consequences of hydromagnetic waves on magnetospheric particle dynamics, Space Science Reviews, 42, 3-4, 515.

  29. Birth of International School of Space Simulations In 1981, Roger Gendrin, Hiroshi Matsumoto, Tetsuya Sato and Myself realized the importance of numerical simulations for space physics

  30. Birth of International School of Space Simulations • Roger Gendrin suggested that a school be formed to teach young space physicists the art of plasma simulations • We agreed that such a school should include intensive tutorials and present the latest breakthroughs in the field of numerical simulations and space observations • The school should be international (France, Japan, USA) Kauai, 1985

  31. ISSS-1Kyoto, 1982

  32. ISSS-2Kauai, 1985

  33. ISSS-3 La Londe-les-Maures, 1987

  34. ISSS-3Beaulieu sur Mer, 1987

  35. …to the most recent ISSS-8 (Kauai, 2007) … and after 26 years the School continues with ISSS-9 to be held in July 2009 in Versailles.

  36. Herve de Feraudy Sylvaine Perraut Bertrand de la Porte Jean Berchem Bertrand Lembege Laurence Rezeau Claude de Villedary Maha Ashour-Abdalla Philippe Louarn Jacqueline Etcheto Gerard Belmont Philippe Savoini Nicole Cornilleau Patrick Robert Fabrice Mottez Alain Hilgerts Alain Roux Alain Meyer Roger Riguet Kuni Kodera Jacques Solomon Nicole Dupin Georges Laurent GerardChanteur Patrick Canu Bernard Higel

  37. The five space probes comprising the THEMIS mission were launched on February 17, 2007 Search Coil Magnetometer (SCM) Its primary mission is to establish where in Earth's magnetosphere substorms originate.

  38. Roger’s group … R. Gendrin, B. de la Porte, R. Riguet, J. Etcheto in Kerguelen Islands N. Cornilleau, J. Solomon, S. Perrault

  39. "Once we set out on a voyage in the ocean, we never change the name of the ship" (Roger Gendrin) Journal of Geophysical Research, 1985,Vol.91, No. A4, pp. 4593

  40. "Once we set out on a voyage in the ocean, we never change the name of the ship" (Roger Gendrin, in response to a request to change the order of the authors for this Reply that he wrote) Journal of Geophysical Research, 1985,Vol.91, No. A4, pp. 4593

  41. GEOS at ESTEC … Large Test Chamber White Room

  42. Birth of International School of Space Simulations • In 1981, Roger Gendrin, Hiroshi Matsumoto, Tetsuya Sato and Myself realized the importance of numerical simulations for space physics

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