Local time distributions of repetition periods for rising tone lower band chorus waves in the magnetosphere

Author
Keywords
Abstract
Whistler mode chorus waves generally occur outside the plasmapause in the magnetosphere. The most striking feature of the waves is their occurrence in discrete elements. One of the parameters that describe the discrete elements is the repetition period (Trp), the time between consecutive elements. The Trp has not been studied statistically before. We use high-resolution waveform data to derive distributions of Trp for different local times. We find that the average Trp for the nightside (0.56 s) and dawnside (0.53 s) are smaller than those for the dayside (0.81 s) and duskside (0.97 s). Through a comparison with the background plasma and magnetic fields, we also find that the total magnetic field and temperature are the main controlling factors that affect the variability of Trp. These results are important for understanding the generation mechanism of chorus and choosing parameters in simulations that model the acceleration and loss of electrons by wave-particle interactions.
Year of Publication
2015
Journal
Geophysical Research Letters
Volume
42
Number of Pages
8294-8301
Date Published
10/2015
URL
http://doi.wiley.com/10.1002/2015GL066107http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002\%2F2015GL066107
DOI
10.1002/2015GL066107