Determining the release time of solar energetic particles regarding the perpendicular diffusion effect

Details Determining the release time of solar energetic particles regarding the perpendicular diffusion effect Determining the release time of solar energetic particles regarding the perpendicular diffusion effect

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh31b2012w&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH31B-2012

Physics

Plasma Physics

[7859] Space Plasma Physics / Transport Processes

Scientific paper

The onset time of solar energetic particle (SEP) events can be used to determine the release time of SEPs in the source with the velocity dispersion method, which assumes that the first arriving particles move along the magnetic field and the scattering can be ignored. However, with perpendicular diffusion, the first arriving particles may cross the interplanetary magnetic field (IMF) and the assumption for the velocity dispersion method might be invalid. In this article, we calculate SEPs' intensity time profiles including the perpendicular diffusion. Comparing the cases of SEPs transport simulations with and without perpendicular diffusion, we found that when the observer is directly connected with SEP source by IMF, the SEPs' release time calculated from the velocity dispersion method is accurate enough. However, if the observer is not connected with the SEP source by the IMF, the perpendicular diffusion causes the SEP event's onset time delayed significantly. Therefore, the velocity dispersion method can be only used when the observer is connected with the SEP source by IMF directly.

Affiliated with

Also associated with

No associations

Rating

Determining the release time of solar energetic particles regarding the perpendicular diffusion effect 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 Determining the release time of solar energetic particles regarding the perpendicular diffusion effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining the release time of solar energetic particles regarding the perpendicular diffusion effect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-878583