Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11a1583s&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM11A-1583
Physics
2716 Energetic Particles: Precipitating, 2730 Magnetosphere: Inner, 2768 Plasmasphere, 2772 Plasma Waves And Instabilities (2471), 2774 Radiation Belts
Scientific paper
Wave-particle interactions occurring in plasmaspheric plumes can significantly influence particle dynamics in the Earth's inner magnetosphere. Here we analyze electron precipitation loss to the atmosphere due to pitch- angle scattering by whistler-mode ELF hiss in plasmaspheric plumes.Using wave observations and inferred plasma densities from CRRES we analyze plume intervals for which well-determined hiss spectral intensities are available.We then select 14 representative plumes for detailed study,comprising 10 duskside plumes and 4 nonduskside plumes,with local hiss amplitudes ranging from maximum values of above 300 pT to minimum values of less than 1 pT.We estimate the electron loss timescale T due to pitch-angle scattering by hiss in each chosen plume as a function of L-shell and electron energy.We find that pitch-angle scattering by hiss in plumes can be efficient for inducing precipitation loss of outer-zone electrons with energies throughout the range 100 keV to 1 MeV,though the magnitude of T can be highly dependent on wave power,L-shell and electron energy. For 100- to 200-keV electrons,typically T is about 1 day while the minimum loss timescale (T)min is of the order of hours. For 500-keV to 1-MeV electrons, typically (T)min is of the order of days,while (T)min is less than 1 day in the case of large wave amplitude (~100's pT).Apart from inducing direct precipitation loss of MeV electrons,scattering by hiss in plumes may reduce the generation of MeV electrons by depleting the lower energy electron seed population. Comprehensive models of electron dynamics in Earth's inner magnetosphere should incorporate electron precipitation loss induced by ELF hiss scattering in plasmaspheric plumes.
No associations
LandOfFree
Electron Precipitation Loss due to Pitch-Angle Scattering by Whistler-Mode Hiss in Plasmaspheric Plumes 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 Electron Precipitation Loss due to Pitch-Angle Scattering by Whistler-Mode Hiss in Plasmaspheric Plumes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron Precipitation Loss due to Pitch-Angle Scattering by Whistler-Mode Hiss in Plasmaspheric Plumes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1092117