Suppression of resonant field line oscillations by a turbulent background

Details Suppression of resonant field line oscillations by a turbulent background Suppression of resonant field line oscillations by a turbulent background

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007p%26ss...55..694c&link_type=abstract

Planetary and Space Science, Volume 55, Issue 6, p. 694-700.

Physics

2

Scientific paper

Stochastic fluctuations of the magnetospheric plasma and background magnetic field, especially intense during geomagnetically active periods, can provide an additional mechanism of damping of Alfvén field line oscillations. To quantify this hypothesis, we consider a driven Alfvén field line resonator with stochastic fluctuations of the Alfvén resonant frequency. This problem is first considered analytically for a low level of fluctuations, then a more general numerical approach is introduced. The results of analytical calculations and numerical modeling both indicate the deterioration of resonant properties of the resonator owing to stochastic background fluctuations.

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