Wave-particle interactions at dipolarization fronts

Details Wave-particle interactions at dipolarization fronts Wave-particle interactions at dipolarization fronts

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm13c2097k&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM13C-2097

Physics

Plasma Physics

[7829] Space Plasma Physics / Kinetic Waves And Instabilities, [7835] Space Plasma Physics / Magnetic Reconnection, [7846] Space Plasma Physics / Plasma Energization, [7867] Space Plasma Physics / Wave/Particle Interactions

Scientific paper

We report in situ observations by the Cluster spacecraft of wave-particle interactions in a magnetic flux pileup region created by a magnetic reconnection outflow jet in Earth's magnetotail. Two distinct regions of wave activity are identified: lower-hybrid drift waves at the front edge and whistler-mode waves inside the pileup region. The whistler-mode waves are locally generated by the electron temperature anisotropy, and provide evidence for ongoing betatron energization caused by magnetic flux pileup. The whistler-mode waves cause fast pitch-angle scattering of electrons and isotropization of the electron distribution, thus making the flow braking process nonadiabatic. The waves strongly affect the electron dynamics and thus play an important role in the energy conversion chain during plasma jet braking.

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