Review of the Jovian Trapped Particle Environment Models: Past, Present, and Future (Invited)

Details Review of the Jovian Trapped Particle Environment Models: Past, Present, and Future (Invited) Review of the Jovian Trapped Particle Environment Models: Past, Present, and Future (Invited)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm11c..07j&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM11C-07

Other

[7984] Space Weather / Space Radiation Environment

Scientific paper

As Jupiter has the strongest magnetic field among the planets in the solar system, its trapped particle environments are higher both in energy and number density than the other planets thereby greatly enhancing the intensity of its radiation belts. Good predictive models of these trapped particle environments are critical to adequately designing spacecraft that will explore Jupiter or for explaining the phenomena associated with the trapped particle dynamics (e.g., aurora, synchrotron radiation emission, etc.) in the Jovian magnetosphere. The trapped particle environment at Jupiter includes electrons, protons, and heavy ions. The first models for these particles first appeared soon after the discovery of the “Jovian Van Allen belt” in the late 1950’s and early 1960’s. These models were based on theories of the Earth’s radiation belts and limited ground-based observations of jovian synchrotron radiation. Later, data returned by in-situ instruments onboard the Pioneer and Voyager spacecraft led to the first comprehensive Jovian trapped radiation environment models in 1980’s and 1990’s. Recently, major steps forward, especially in modeling the high energy electrons and heavy ions, were made possible by the instruments on the Galileo spacecraft during its extended mission from 1995 through 2003. In parallel, a physical model developed by the Europeans during this period has advanced our understanding of trapped particle diffusion in the Jovian magnetosphere. Current models being used in the community are by no means complete nor perfect. National and international efforts are in progress to slowly but surely advance our knowledge of this challenging environment. This talk is intended as a top level review of the Jovian radiation models: past efforts, the state-of-the-art models, and future directions.

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