Importance of the Landau resonance of a whistler-mode wave packet centered at half the gyrofrequency

Details Importance of the Landau resonance of a whistler-mode wave packet centered at half the gyrofrequency Importance of the Landau resonance of a whistler-mode wave packet centered at half the gyrofrequency

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37.1171v&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 37, Aug. 1975, p. 1171, 1172. Research supported by the Department of Space

Physics

Gyrofrequency, Plasma Resonance, Propagation Modes, Wave Packets, Whistlers, Electromagnetic Fields, Landau Damping, Plasma Frequencies, Very Low Frequencies

Scientific paper

If the group velocity of a wave pulse equals the phase velocity of its central wave, particles with an appropriate velocity component along the ambient magnetic field experience Landau resonance with the whole group of waves simultaneously. For whistlers, it occurs if the central frequency equals half the electron gyrofrequency. The enhanced Landau resonant diffusion thus caused makes Dungey's mechanism for preferential triggering of VLF emissions at this frequency more effective.

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