Physics – Plasma Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11506101c&link_type=abstract
Journal of Geophysical Research, Volume 115, Issue A6, CiteID A06101
Physics
Plasma Physics
1
Space Plasma Physics: Charged Particle Motion And Acceleration, Solar Physics, Astrophysics, And Astronomy: Energetic Particles (2114), Space Weather: Space Radiation Environment, Solar Physics, Astrophysics, And Astronomy: Flares, Solar Physics, Astrophysics, And Astronomy: Coronal Mass Ejections (2101)
Scientific paper
We study the transport of solar energetic particles (SEPs) in the inner heliosphere in order to relate observations made by an observer at 1 AU to the number and total energy content of accelerated particles at the source, assumed to be near the Sun. We use a numerical simulation that integrates the trajectories of a large number of individual particles moving in the interplanetary magnetic field. We model pitch angle scattering and adiabatic cooling of energetic ions with energies from 50 keV nucleon-1 to 100 MeV nucleon-1. Among other things, we determine the number of times that particles of a given energy cross 1 AU and the average energy loss that they suffer because of adiabatic deceleration in the solar wind. We use a number of different forms of the interplanetary spatial diffusion coefficient and a wide range of scattering mean-free paths and consider a number of different ion species in order to generate a wide range of simulation results that can be applied to individual SEP events. We apply our simulation results to observations made at 1 AU of the 20 February 2002 solar energetic particle event, finding the original energy content of several species. We find that estimates of the source energy based on SEP measurements at 1 AU are relatively insensitive to the mean-free path and scattering scheme if adiabatic cooling and multiple crossings are taken into account.
Chollet Eileen
Giacalone Joe
Mewaldt Richard A.
No associations
LandOfFree
Effects of interplanetary transport on derived energetic particle source strengths 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 Effects of interplanetary transport on derived energetic particle source strengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of interplanetary transport on derived energetic particle source strengths will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1578061