Eigenmode Analysis of Energy and Pitch-Angle Diffusion of Energetic Electrons in the Outer Zone: 0.1-5 MeV

Details Eigenmode Analysis of Energy and Pitch-Angle Diffusion of Energetic Electrons in the Outer Zone: 0.1-5 MeV Eigenmode Analysis of Energy and Pitch-Angle Diffusion of Energetic Electrons in the Outer Zone: 0.1-5 MeV

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm41c..03o&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM41C-03

Physics

2720 Energetic Particles: Trapped, 2772 Plasma Waves And Instabilities (2471), 2774 Radiation Belts

Scientific paper

We extend our earlier eigenmode analysis of pitch-angle diffusion for 1-5 MeV electrons in the outer zone to a broader energy range: 0.1-5 MeV, and we include energy diffusion as well. The study is motivated by the fact that the projection of the observed particle distribution into the longest-lived eigenmode ought to be larger than the projection into shorter-lived eigenmodes. The analysis consists of determining the eigenvalues and eigenmodes of the drift-bounce averaged pitch-angle and energy diffusion operator under various assumptions about the ambient wave and plasma environment. In this study, we examine the relative contributions from chorus, hiss, and electromagnetic ion-cyclotron (EMIC) waves. By examining electron pitch-angle and energy distributions, we can refine our constraints on the contribution of EMIC waves (which primarily affect higher energy electrons) relative to hiss and chorus. We tune the free parameters of a simple model of the wave environment to achieve the greatest similarity between the observed energy and pitch-angle distribution and the first eigenmode of the diffusion operator. Thus, we are able to constrain the wave distribution on the entire drift shell from local energy- and pitch-angle distributions observed at a single location.

Affiliated with

Also associated with

No associations

Rating

Eigenmode Analysis of Energy and Pitch-Angle Diffusion of Energetic Electrons in the Outer Zone: 0.1-5 MeV 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 Eigenmode Analysis of Energy and Pitch-Angle Diffusion of Energetic Electrons in the Outer Zone: 0.1-5 MeV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eigenmode Analysis of Energy and Pitch-Angle Diffusion of Energetic Electrons in the Outer Zone: 0.1-5 MeV will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1097238