de Soria-Santacruz M., K. G. Orlova, M. Martinez-Sanchez, Y. Y. Shprits, (2013), Scattering rates of inner belt protons by EMIC waves: A comparison between test particle and diffusion simulations, Geophysical Research Letters, 40, 4793-4797, doi:10.1002/grl.50925
Abstract
Inner belt energetic protons are a hindrance to development of space technologies. The emission of electromagnetic ion cyclotron (EMIC) waves from spaceborne transmitters has been proposed as a way to solve this problem. The interaction between particles and narrowband emissions has been typically studied using nonlinear test particle simulations. We show that this formulation results in a random walk of the inner belt protons in velocity space. In this paper we compute bounce-averaged pitch angle diffusion rates from test particle simulations and compare them to those of quasi-linear theory for quasi-monochromatic EMIC waves interacting with inner belt protons. We find that the quasi-linear solution is not sensitive to the frequency bandwidth for narrow distributions. Bounce-averaged diffusion coefficients from both approaches are in good agreement for all energies and pitch angles. The interaction with inner belt protons, therefore, can be addressed using quasi-linear diffusion codes, which allows faster exploration of parameter space.Authors (sorted by name)
de Soria-Santacruz Martinez-Sanchez Orlova ShpritsJournal / Conference
Geophysical Research LettersAcknowledgments
M. de Soria‐Santacruz acknowledges fellowship support from “Fundacion Caja Madrid”. Work at UCLA was supported by UC Lab Fee grant. The research of K. Orlova was supported by the NASA Living With a Star Jack Eddy Postdoctoral Fellowship Program, administered by the University Corporation for Atmospheric Research (UCAR). This research was also partially supported by NASA grant NNX10AK99G and MIT award No 019683‐150.Grants
019683‐150 12-LR-235337 Jack Eddy NNX10AK99GBibtex
@article{doi:10.1002/grl.50925,
author = {de Soria-Santacruz, M. and Orlova, K. G. and Martinez-Sanchez, M. and Shprits, Y. Y.},
title = {Scattering rates of inner belt protons by EMIC waves: A comparison between test particle and diffusion simulations},
year = {2013},
journal = {Geophysical Research Letters},
volume = {40},
number = {18},
pages = {4793-4797},
keywords = {EMIC, inner belt, wave-particle interactions},
doi = {10.1002/grl.50925},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/grl.50925},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/grl.50925},
abstract = {Inner belt energetic protons are a hindrance to development of space technologies. The emission of electromagnetic ion cyclotron (EMIC) waves from spaceborne transmitters has been proposed as a way to solve this problem. The interaction between particles and narrowband emissions has been typically studied using nonlinear test particle simulations. We show that this formulation results in a random walk of the inner belt protons in velocity space. In this paper we compute bounce-averaged pitch angle diffusion rates from test particle simulations and compare them to those of quasi-linear theory for quasi-monochromatic EMIC waves interacting with inner belt protons. We find that the quasi-linear solution is not sensitive to the frequency bandwidth for narrow distributions. Bounce-averaged diffusion coefficients from both approaches are in good agreement for all energies and pitch angles. The interaction with inner belt protons, therefore, can be addressed using quasi-linear diffusion codes, which allows faster exploration of parameter space.}
}