Observation of electron bunching during Landau growth and damping

Details Observation of electron bunching during Landau growth and damping Observation of electron bunching during Landau growth and damping

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9611371e&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, July 1, 1991, p. 11,371-11,378. Research supported by University of C

Computer Science

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Auroral Electrojets, Electron Bunching, Landau Damping, Plasma Waves, Rocket Sounding, Space Plasmas

Scientific paper

A high-frequency wave-particle correlator instrument has been flown for the first time on a recent auroral sounding rocket. The direct observation of electron bunching showed that large-amplitude Lagmuir waves were resonant with low-energy, field-aligned electrons, roughly corresponding to expectations. The observed electron bunching, however, appeared to be in phase (or 180 deg out of phase) with the electric field signal rather than the wave potential, indicating that an energy exchange was occurring. An elementary energy transfer analysis shows that Landau growth or damping could account for the electron bunching. A Monte Carlo test particle simulation supports this model.

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