Heating of Plasmas in the Near-Earth Magnetotail by the Impact of an Interplanetary Shock

Details Heating of Plasmas in the Near-Earth Magnetotail by the Impact of an Interplanetary Shock Heating of Plasmas in the Near-Earth Magnetotail by the Impact of an Interplanetary Shock

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm41a2008l&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM41A-2008

Physics

Plasma Physics

[2139] Interplanetary Physics / Interplanetary Shocks, [2744] Magnetospheric Physics / Magnetotail, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions, [7846] Space Plasma Physics / Plasma Energization

Scientific paper

It has been reported that radiation belt particles are rapidly energized by the impact of an interplanetary shock. In this study we report the observations by Cluster spacecraft that strong heating of plasmas occurs in the near-Earth magnetotail at ~-17 RE when an interplanetary shock impacts Earth's magnetosphere. On 24 August 2005 an interplanetary shock impacted Earth's magnetosphere and induced a storm sudden commencement (SSC) and magnetic storm. After the SSC both the density and temperature of plasmas in the near-Earth magnetotail significantly increased. The increases are more clearly seen in electrons than ions. Also, the particle fluxes of ions and electrons with E > ~30 keV increased more than an order of magnitude after the SSC. For ions significant flux enhancement was observed up to ~92.2 keV. On the other hand, for electrons the enhancement was observed up to ~127.5 keV. These results suggest that the heating is more efficient on electrons than ions. We will discuss about the physical mechanism responsible for the heating of plasmas in the magnetotail due to the impact of an interplanetary shock.

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