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Accueil > Séminaires & Soutenances > Séminaires, soutenances de thèses et HDR précédents > 2009 > Séminaires 2009 > Le mardi 24 mars 2009 14h

Le mardi 24 mars 2009 14h

Kanako Seki (Université de Nagoya)

mardi 24 mars 14h

Saint-Maur salle de réunion

Investigation of particle acceleration and transport in Geospace :
The ERG project and related pre-launch activities for integrated data
analysis and modeling

Geospace storms are the largest electromagnetic disturbances in the
near-Earth space caused by CMEs and CIRs accompanied by the strong southward IMF.
During the geospace storms, it is observationally known that the
particle acceleration up to the relativistic energies are taking place as a
consequence of dynamic interactions of the magnetic and electric field and
particles. In the course of the acceleration processes, all charged particles in a wide energy range over 6 orders of magnitude (from <1eV to >MeV) are potentially
important. The occurrence frequency of geospace storms increases with increasing
solar activities.
Aiming at the next solar maximum, we are now developing the ERG
(Energization and Radiation in Geospace) project, which consists of the three parts :

1. Satellite
observation of equatorial inner magnetosphere with the particle sensor
package and wave instruments that cover potentially important energy and
frequency ranges,

2. Ground-based network observations of field configurations to
capture global features, and

3. Integrated data center to promote data analysis, modeling, and simulation studies to connect satellite and ground-based observations.

In this presentation, we report on the current status of the ERG
project and related pre-launch activities in Japan mainly focused on the 3rd part for
integrated data analysis and modeling, which includes recently started GEMSIS (Geospace Environment Modeling System for Integrated Studies) project of STEL,
Nagoya University. Key issues and scientific strategy of the data analysis,
modeling, simulation, and their combination in order to understand the physical
process of the plasma transport and particle acceleration in the inner
magnetosphere during the geospace storms will be also discussed.

CNRS Ecole Polytechnique Sorbonne Université Université Paris-Saclay Observatoire de Paris
©2009-2020 Laboratoire de Physique des Plasmas (LPP)

Mentions légales
Exploitant du site : Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Hébergeur : Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Directeur de la publication : Dominique Fontaine (Directrice)