Title: Particle tracing modeling of ion fluxes at geosynchronous orbit

Abstract

The initial results of a coupled MHD/particle tracing method to evaluate particle fluxes in the inner magnetosphere are presented. This setup is capable of capturing the earthward particle acceleration process resulting from dipolarization events in the tail region of the magnetosphere. On the period of study, the MHD code was able to capture a dipolarization event and the particle tracing algorithm was able to capture our results of these disturbances and calculate proton fluxes in the night side geosynchronous orbit region. The simulation captured dispersionless injections as well as the energy dispersion signatures that are frequently observed by satellites at geosynchronous orbit. Currently, ring current models rely on Maxwellian-type distributions based on either empirical flux values or sparse satellite data for their boundary conditions close to geosynchronous orbit. In spite of some differences in intensity and timing, the setup presented here is able to capture substorm injections, which represents an improvement regarding a reverse way of coupling these ring current models with MHD codes through the use of boundary conditions.

Authors:

Brito, Thiago V.  ^[1];

• Search DOE PAGES for author "Brito, Thiago V."
• Search DOE PAGES for ORCID "0000-0002-2531-5848"

Woodroffe, Jesse  ^[1];

• Search DOE PAGES for author "Woodroffe, Jesse"
• Search DOE PAGES for ORCID "0000-0002-2149-7883"

Jordanova, Vania K.  ^[1];

• Search DOE PAGES for author "Jordanova, Vania K."
• Search DOE PAGES for ORCID "0000-0003-0475-8743"

Henderson, Michael  ^[1];

• Search DOE PAGES for author "Henderson, Michael"
• Search DOE PAGES for ORCID "0000-0003-4975-9029"

Birn, Joachim ^[1]

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+ Show Author Affiliations

1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:

Tue Oct 31 00:00:00 EDT 2017

Research Org.:

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1408839

Report Number(s):

LA-UR-17-24955
Journal ID: ISSN 1364-6826; TRN: US1703078

Grant/Contract Number:  

AC52-06NA25396

Resource Type:

Accepted Manuscript

Journal Name:

Journal of Atmospheric and Solar-Terrestrial Physics

Additional Journal Information:

Journal Volume: 177; Journal ID: ISSN 1364-6826

Publisher:

Elsevier

Country of Publication:

United States

Language:

English

Subject:

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Heliospheric and Magnetospheric Physics; Geosynchronous fluxes; Substorms; Particle tracing