Theoretical study of amplitude pulsations of 'key-down' whistler mode signals in the geomagnetosphere

Details Theoretical study of amplitude pulsations of 'key-down' whistler mode signals in the geomagnetosphere Theoretical study of amplitude pulsations of 'key-down' whistler mode signals in the geomagnetosphere

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82..105n&link_type=abstract

Journal of Geophysical Research, vol. 82, Jan. 1, 1977, p. 105-116.

Physics

Earth Magnetosphere, Magnetoionics, Radio Signals, Very Low Frequencies, Vlf Emission Recorders, Whistlers, Amplitude Modulation, Continuous Spectra, Electromagnetic Wave Transmission, Electron Distribution, Energy Dissipation, Geomagnetic Pulsations, Geomagnetism, Gyrofrequency, Integral Equations, Plasma-Electromagnetic Interaction, Spatial Distribution

Scientific paper

Equations are derived which govern modulation of a continuous-wave whistler-mode transmission by gyroresonant electrons in a region limited in spatial extent. This model is similar to that used to explain the qualitative features of discrete VLF emissions in the geomagnetosphere. It is found that nonlinear wave-particle interaction results in amplitude modulation of the wave. An integral equation is then derived for the amplitude of the signal leaving the region. Numerical solutions of this equation for a loss-cone electron distribution and parameters typical of the geomagnetosphere at L = 3 result in quasi-periodic pulsations in amplitude for sufficiently high densities of resonant electrons. The frequency of these pulsations is in the several-hertz range, consistent with observations. Similarities of and differences between these calculations and previous theoretical studies of 'key-down' transmissions are discussed.

Affiliated with

Also associated with

No associations

Rating

Theoretical study of amplitude pulsations of 'key-down' whistler mode signals in the geomagnetosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Theoretical study of amplitude pulsations of 'key-down' whistler mode signals in the geomagnetosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theoretical study of amplitude pulsations of 'key-down' whistler mode signals in the geomagnetosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-952633