Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm41a1837l&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM41A-1837
Physics
[2744] Magnetospheric Physics / Magnetotail, [2772] Magnetospheric Physics / Plasma Waves And Instabilities, [2790] Magnetospheric Physics / Substorms
Scientific paper
A theory was recently developed to derive the dispersion equation of kinetic ‘bounce’ modes that may develop in 2D current sheet (Tur et al, Physics of Plasmas). The purpose was to investigate the role of ballooning-type perturbations in the dynamics of current sheets and their possible destabilization by resonant interactions with electrons that bounce in the current sheet (trapped electrons), for potential application to substorm theory. It was shown that these modes are potentially unstable provided that the electron mean energy (Ee) is not too small compared to the ion one (Ee> 0.3-0.5 Ei). In the poster, we detail what can be some of the observables that can be extracted from CLUSTER and THEMIS data sets to verify whether such modes actually exist. As a first application, we use CLUSTER field and particle data and the AMDA service developed by CDPP to investigate whether fluctuations observed during phases of magnetotail activity might present the expected characteristics of kinetic ‘bounce’ modes.
Fruit G.
Génot Vincent
Jacquey Christian
Louarn Ph.
Palin L.
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